CTC / Continuous Transaction Controls Analysis for Senior Leadership — Ecuador

Executive Summary:

Ecuador operates one of Latin America’s most mature “clearance-model” e-invoicing regimes, known as comprobantes electrónicos (electronic vouchers), under the authority of the Servicio de Rentas Internas (SRI). The system, which began as a pilot in 2012, achieved near-universal mandatory coverage by November 29, 2022. A significant upcoming change is the shift to real-time transmission of e-invoices to the SRI from January 1, 2026, which removes the deferred-transmission buffer and significantly raises operational requirements for taxpayers. The regime utilizes a bespoke national XML format, signed with a XAdES-BES electronic signature, and is characterized by a “self-authorization” model where the taxpayer generates its own authorization number (clave de acceso). Penalties for non-compliance are substantial, including business closure and significant fines, with the critical consequence that an unauthorized or non-transmitted voucher is invalid for claiming IVA input credit or expense deductibility.

Introduction and Country Context

Ecuador was an early adopter of electronic invoicing in Latin America, establishing its legal framework with the Ley de Comercio Electrónico in 2002. The program’s primary rationale is IVA/VAT control and closing the compliance gap, aiming to increase the SRI’s visibility over transactions [1.2].

Pioneering LATAM Model: Ecuador belongs to the Latin American cohort that pioneered clearance-model e-invoicing, sitting alongside countries like Chile, Brazil, Mexico, Peru, Colombia, and Argentina. With the 2026 real-time rule, it is “tightening toward near-continuous reporting” [1.3].
Domestic Framework: The system is purely domestic, based on Ecuadorian law and SRI resolutions, and is not an EU Member State, thus unaffected by EU VAT in the Digital Age (ViDA) provisions [1.4].

Regulatory Framework and Key Timelines

The e-invoicing mandate is built upon a foundation of primary tax legislation (Ley de Régimen Tributario Interno – LRTI) and numerous SRI resolutions.

Legal Validity: The Ley de Comercio Electrónico (2002) grants signed electronic messages the same validity as paper documents [1.1].
Key Milestones:2012: Voluntary pilot scheme launched [5.1].
2014-2018: Phased mandatory adoption for specific sectors (financial, telecoms, exporters, public sector) [5.1].
January 1, 2018: Migration to the current “offline self-authorization scheme” [5.1].
November 29, 2022: Universal mandate came into effect, obliging “essentially all RUC holders obliged to issue sales receipts” to use e-invoicing [5.3].
November 2024: Transmission window temporarily extended to 4 business days due to electrical emergency [5.5].
August 1, 2025: Tighter rules for voucher annulment come into effect [5.6].
January 1, 2026: Mandatory real-time/immediate transmission of e-invoices to the SRI [5.5].
From 2026: Final-consumer B2C invoices can no longer be cancelled [5.6].

Scope of the Mandate

The obligation is broad, covering most transaction types and taxpayers.

Transactions in Scope: Covers domestic B2B, B2G, and B2C transactions, with exports also included. “The obligation attaches to the issuer’s status rather than the counterparty type” [3.1]. Transactions with the State of USD 1,000 or more have required electronic receipts since 2021 [3.1].
Special Transactions: Includes electronic notas de crédito and notas de débito for corrections, and comprobantes de retención for Ecuador’s extensive withholding regime. Liquidaciones de compra serve as a functional equivalent to self-billing for purchases from non-issuers [3.2, 11].
Taxpayers in Scope: All sociedades (companies) and personas naturales (individuals) obliged to issue comprobantes, including public-sector entities and withholding agents [4.1].
Main Carve-outs/Exemptions:RIMPE negocios populares (annual turnover ≤ USD 20,000) are the principal exception; they may issue physical notas de venta but must issue an electronic factura if a customer requires one [3.3, 4.4].
Galápagos-province residents without mainland operations [3.3].
Force majeure contingency pre-printed documents are capped at 1% of total issuances [3.3].

Operational Model: How it Works

Ecuador employs a CTC (Continuous Transaction Control) clearance model, specifically the offline self-authorization variant.

Model Type: “The taxpayer generates its own 49-digit clave de acceso (which itself is the authorization number), signs the XML and transmits it to the SRI” [6.1].

Invoice Lifecycle:XML Generation: Includes the unique 49-digit clave de acceso.
Signature: The XML is signed with a XAdES-BES electronic signature using a digital certificate from an ARCOTEL-accredited CA.
Reception: The signed XML is sent to the SRI web service.
Authorization: SRI validates and returns AUTORIZADO, NO AUTORIZADO, or EN PROCESAMIENTO.
Delivery: The human-readable RIDE (Representación Impresa del Documento Electrónico) plus the authorized XML is delivered to the buyer [6.2].

Clave de Acceso & RIDE: The clave de acceso is a 49-digit key encoding transaction details. The RIDE is the printed/PDF representation with full tax and legal validity, carrying a GS1-128 barcode with the clave de acceso [6.6].
Offline/Contingency Mode: The system’s design inherently supports a form of contingency: “because the self-generated clave de acceso is the authorization number, a document is valid on delivery even before the SRI has authorized it” [6.4]. However, from January 1, 2026, “genuine contingencies (connectivity loss) rely on prompt catch-up transmission once service resumes” [6.4].
Buyer-Side Workflow: Buyers receive the RIDE and authorized XML and can verify authenticity via SRI en Línea. “Only a valid, authorized comprobante supports the buyer’s IVA input credit… and expense deduction” [6.5].
Mandatory Format: The mandatory format is XML per SRI XSD schemas (current version v2.32, Nov 2025). The XML is the legally valid original [7.1]. It does not implement EN 16931, Peppol, UBL, or UN/CEFACT CII [7.2].
Corrections: Corrections are made using electronic notas de crédito (reducing/annulling) and notas de débito (increasing), both referencing the original document [9.1]. From August 1, 2025, voucher annulment must occur by the 7th of the following month, and from January 1, 2026, e-invoices issued to a final consumer (B2C) cannot be cancelled [9.1].

Penalties and Enforcement

Non-compliance carries significant penalties, impacting both the issuer and the recipient.

Business Closure (Clausura): Failure to issue comprobantes or issuing them without legal requirements can result in a 7-day temporary closure of the establishment [14.1].
Monetary Fines: Graduated fines from 1 to 30 unified basic salaries (RBU) for non-issuance/non-delivery and non-transmission. For large taxpayers, this can be “up to ~USD 14,000+” [14.2].
Loss of Tax Rights: “The most significant commercial consequence is that an unauthorized or non-transmitted comprobante is invalid: it does not support IVA input credit (Art. 66 LRTI) or expense deductibility (Art. 10 LRTI)” [14.3]. This provides a strong incentive for buyers to ensure they receive authorized e-invoices.

Archiving and Reporting

The SRI plays a central role in managing and storing e-invoice data.

Central Storage by SRI: Authorized comprobantes are received and stored by the SRI, which holds “the authoritative transactional record” [13.1].
Taxpayer Retention: Both issuer and receiver must archive the signed XML (not just the RIDE) for at least 7 years [13.3].
E-Reporting: IVA is declared monthly (Formulario 104), and transactional detail is reported via the Anexo Transaccional Simplificado (ATS). The e-invoice XML feeds into the reconciliation process [8.2]. The system is “directionally” moving towards pre-filled VAT returns, with the 2026 real-time transmission increasing the timeliness of data for this purpose [15.1, 15.3].

International Perspective & Readiness

Ecuador’s e-invoicing system is a domestic solution with regional influences.

ViDA Alignment: N/A: Ecuador is a non-EU country, so the EU VAT in the Digital Age (ViDA) package has “no direct effect” [16.1].
National Standard: The national SRI XML schema is “not aligned with ViDA’s Digital Reporting Requirements, EN 16931, Peppol or UBL” [16.2].
Regional Kinship: Its framework is conceptually similar to other LATAM XML clearance schemas [16.2].
Business Implications: For multinationals, the Ecuadorian solution requires “bespoke national integration” rather than a plug-in to a global standard [16.4].

Impact on SMEs and Implementation Considerations

Ecuador has taken steps to support small and medium-sized enterprises (SMEs), but implementation still presents challenges.

SME Support:RIMPE Carve-out: Negocios populares are exempt from mandatory e-invoicing [17.1].
Free SRI Tools: The SRI provides “free online and downloadable desktop tools” (Facturador SRI) for most taxpayers [17.2].
Compliance Costs: The “principal cost driver is the firma electrónica certificate,” which has an official/market rate of roughly USD 16-60 for renewal [17.5].
Key Implementation Risks & Pitfalls:Real-time Transition (from 2026): Requires robust “connectivity and system resilience” [19.6].
Digital-Certificate Dependency: Ensuring valid, renewed certificates from ARCOTEL-accredited CAs [19.6].
Tighter Correction/Annulment Rules: Adhering to new deadlines and the inability to cancel final-consumer B2C invoices from 2026 [19.6].
Loss of IVA Credit/Deductions: For unauthorized vouchers, making buyer validation crucial [19.6].
ERP/Finance System Impacts: Larger businesses integrate with SRI web services (directly or via providers), requiring resilient, low-latency connectivity for 2026 [18.1].

Key Takeaways & Actionable Items:

Real-time is Coming (Jan 1, 2026): Businesses must verify system latency, retry logic, and contingency handling to ensure immediate transmission to the SRI. This is the most material live change.
Digital Certificate Management: Establish robust controls for firma electrónica lifecycle (issuance, renewal, custody) as it’s a prerequisite and recurring cost/risk.
Strict Annulment Rules: Be aware of the tighter annulment deadlines (by 7th of following month) and the inability to cancel final-consumer B2C invoices from 2026.
Buyer Due Diligence: Buyers must continue to validate that supplier comprobantes are authorized by the SRI to claim IVA credit and expense deductibility, as an invalid voucher leads to loss of tax rights.
Bespoke Integration: For international businesses, treat Ecuador as a unique national integration, not a Peppol/ViDA build.

One-line orientation: Ecuador operates a mandatory Continuous Transaction Controls (CTC) clearance e-invoicing system administered by the Servicio de Rentas Internas (SRI). Taxpayers required or authorised to issue electronic tax documents must generate electronic invoices in the prescribed XML format, digitally sign them, and submit them to the SRI for validation and authorisation before they are delivered to the customer. The SRI issues an electronic authorisation code (clave de acceso/authorisation) confirming the fiscal validity of the document. The regime covers B2B, B2C, and B2G transactions, as well as other tax documents such as credit notes, debit notes, withholding certificates, and delivery guides, making Ecuador one of Latin America’s established real-time clearance CTC jurisdictions.

Chapter 0 — Executive Summary (At-a-Glance)

Ecuador operates one of Latin America’s mature CTC e-invoicing regimes: comprobantes electrónicos (electronic vouchers) issued under the Servicio de Rentas Internas (SRI) clearance/authorization model [1][22]. A pilot began in 2012 and near-universal coverage was reached on 29 November 2022; the most material live change is the shift to real-time transmission from 1 January 2026 [2][15][37].

Status

Live and near-universal. Mandatory for essentially all RUC holders obliged to issue sales receipts since 29 November 2022; RIMPE *negocios populares* (turnover ≤ USD 20,000) are the main exception [13][36].

Model

CTC clearance / self-authorization (“esquema offline”). Since 2018 the taxpayer generates its own 49-digit clave de acceso (which is the authorization number), signs the XML and transmits it to the SRI; from 1 January 2026 transmission must be immediate/real-time [14][22][15].

Mandatory format(s)

XML per SRI XSD schemas (Ficha Técnica Esquema Offline v2.32, Nov 2025), signed with a XAdES-BES electronic signature; the human-readable RIDE carries a GS1-128 barcode with the clave de acceso. No Peppol / EN 16931 [3][4][24].

Key go-live dates

Pilot 2012; phased mandatory 2014–2018; offline scheme 2018; universal mandate 29 November 2022; transmission window 72h → 4 business days (Nov 2024) → real-time from 1 January 2026 [22][29][15].

Taxpayers in scope (headline)

All sociedades and personas naturales obliged to issue comprobantes (B2B, B2G, B2C), RIMPE *emprendedores*, and withholding agents; *negocios populares* and Galápagos residents without mainland operations are the principal carve-outs [13][2].

Central platform / operator

The SRI; free issuance via the Facturador SRI (online and desktop) and validation via SRI en Línea; own/third-party software connects to SRI web services [5][6].

Penalty exposure (headline range)

Clausura (7-day business closure) for non-issuance, plus graduated fines of 1 to 30 unified basic salaries (RBU) for non-issuance/non-transmission — up to ~USD 14,000+ for large taxpayers — and loss of IVA input credit and expense deductibility for unauthorized vouchers [18][17][20].

IVA (VAT) rate

Standard IVA 15% since 1 April 2024 (reduced 5% on some construction materials; 0% on basics and exports) [19][7].

ViDA alignment

N/A. Ecuador is non-EU; the EU VAT in the Digital Age package (adopted 11 March 2025) has no direct effect. Ecuador is a mature LATAM clearance-model CTC country, not Peppol/EN 16931 [43][44].

Top 3 open risks / uncertainties

(1) Real-time transition (from 1 Jan 2026) removes the deferred-transmission buffer, raising the operational bar for connectivity and system resilience [15][27].
(2) Tighter correction/annulment rules (2025 resolutions) — shorter annulment windows and no cancellation of final-consumer B2C invoices from 2026 [16][27].
(3) Digital-certificate dependency — a valid firma electrónica from an ARCOTEL-accredited CA is a prerequisite and a recurring SME cost/renewal risk [21][39].

Information cut-off date

6 July 2026. All cited URLs were checked during research on this date [49].

Chapter 1 — Introduction & Country Context

1.1 Tax digitalisation journey

Ecuador was an early Latin American adopter of electronic invoicing. The legal foundation for electronic documents and signatures is the Ley de Comercio Electrónico, Firmas Electrónicas y Mensajes de Datos (Ley 67, 2002), which gives a signed electronic message the same validity as paper [1]. The SRI opened electronic issuance as a voluntary/pilot scheme in 2012, moved to phased mandatory adoption from 2014, adopted the current offline self-authorization scheme in 2018, and reached near-universal coverage on 29 November 2022 [22][2].

1.2 Rationale (IVA control, fraud, modernisation)

The programme’s rationale is IVA/VAT control and closing the compliance gap: at the time of the universal mandate roughly 2 million of Ecuador’s ~2.27 million registered taxpayers had not yet adopted e-invoicing, and the SRI paired the obligation with a free issuance tool to ease adoption [36]. Real-time transmission from 2026 further tightens the SRI’s visibility over transactions [37][15].

1.3 Positioning — mature LATAM clearance model

Ecuador belongs to the Latin American cohort that pioneered clearance-model e-invoicing, alongside Chile, Brazil (NF-e), Mexico (CFDI), Peru, Colombia and Argentina [44][45]. It sits just behind the earliest and most granular systems (Brazil, Mexico, Chile) but is a mature adopter, and with the January 2026 real-time rule it is tightening toward near-continuous reporting [46][22].

1.4 Supranational authorisation / derogation

Not applicable. Ecuador is not an EU Member State, so no EU Council Implementing Decision or Article 218/232 VAT Directive derogation is required, and Directive 2014/55/EU does not apply [43]. Ecuador’s model is a purely domestic SRI framework; international alignment, where relevant, is with regional LATAM CTC practice rather than any binding supranational instrument [45].

Chapter 2 — Regulatory Framework

2.1 Primary legislation

The substantive tax statute is the Ley de Régimen Tributario Interno (LRTI) with its Reglamento de Aplicación; the Ley de Simplificación y Progresividad Tributaria (enacted 31 December 2019, in force 1 January 2020) reformed Article 103 LRTI to establish electronic issuance as the general rule for comprobantes and created the RIMPE regime [9][2]. IVA input credit requires a valid authorized comprobante (Art. 66 LRTI) and expense deductibility requires supporting comprobantes meeting the requirements (Art. 10 LRTI) [20]. The Ley de Comercio Electrónico (Ley 67, 2002) underpins the legal validity of the signed electronic document [1].

2.2 Implementing regulations & SRI resolutions

The operative regulation is the Reglamento de Comprobantes de Venta, Retención y Documentos Complementarios (RCVRDC), which defines the document types and their electronic issuance [11]. The CTC detail is set by SRI resolutions (Resoluciones NAC-DGERCGC): the pilot (NAC-DGERCGC12-00105, 2012); phased mandates (NAC-DGERCGC14-00157 and successors, 2014–2018); the offline scheme (NAC-DGERCGC18-00000233, 2018); and the universal mandate (NAC-DGERCGC22-00000024), published 27 May 2022 with a deadline of 29 November 2022 [14][13]. Recent resolutions tightened corrections (NAC-DGERCGC25-00000014, effective 1 August 2025) and mandate real-time transmission from 1 January 2026 (NAC-DGERCGC25-00000017) [16][15].

2.3 Circulars, rulings & the correct enabling law

An important clarification: the universal 29 November 2022 mandate was created not by the 2019 Simplicidad law but by the Ley Orgánica para el Desarrollo Económico y la Sostenibilidad Fiscal tras la Pandemia COVID-19 (published 29 November 2021), operationalised by NAC-DGERCGC22-00000024 [10][13]. The two laws are distinct and are cited separately in this booklet: the 2019 law established the general e-invoicing rule and RIMPE, while the 2021 law drove the universal deadline [9][10]. IVA-rate and withholding parameters were reset by later resolutions (e.g. NAC-DGERCGC24-00000008) [7].

2.4 Supranational / international legal basis

Not applicable / N/A. As a non-EU jurisdiction, Ecuador relies on no Council Implementing Decision, no Article 218/232 derogation and no Directive 2014/55/EU obligation [43]. Its framework rests entirely on domestic law and SRI resolutions [1][14].

Chapter 3 — Scope of the Mandate

3.1 Transactions in scope

The obligation attaches to the issuer’s status rather than the counterparty type, so it covers domestic B2B, B2G and B2C; transactions with the State of USD 1,000 or more have required electronic receipts since 2021, reinforcing B2G [2]. Exports (tarifa 0%) are in scope and exporters were among the earliest mandated groups [2][7]. Imports settle IVA at customs rather than through a domestic sales comprobante, with domestic on-sale then invoiced electronically; liquidaciones de compra cover purchases from non-issuers [11].

3.2 Special transactions

Corrections use electronic notas de crédito and notas de débito (Chapter 9) [11]. Ecuador runs an extensive IVA and income-tax withholding regime documented through fully electronic comprobantes de retención, which were included in the 29 November 2022 universal deadline [17][2]. Liquidaciones de compra handle acquisitions from persons who cannot issue their own comprobante (Chapter 11) [11].

3.3 Excluded / exempt transactions

Zero-rated (tarifa 0%) supplies — basic foodstuffs, agricultural inputs, medicines, education, health and exports — and out-of-scope (no objeto) transfers are defined by the LRTI/IVA rules; a factura is still issued electronically with the 0% code where a supply is zero-rated [7]. The principal exclusions from the e-invoicing obligation itself are RIMPE negocios populares (who may issue physical *notas de venta*, but must issue an electronic factura when a customer requires one) and Galápagos-province residents without mainland operations; force-majeure contingency pre-printed documents are capped at 1% of total issuances [2][32].

Chapter 4 — Taxable Persons in Scope

4.1 Established domestic entities

Under the universal mandate, all income-tax subjects (sociedades and personas naturales) obliged to issue comprobantes must do so electronically, together with public-sector entities and withholding agents (who must issue the ATS version of the electronic comprobante de retención) [13][2]. The obligation is comprehensive across established businesses regardless of size, subject to the RIMPE carve-out below [13].

4.2 Non-established entities

The e-invoicing obligation is framed around Ecuadorian RUC holders; the public sources reviewed do not document a distinct comprobante-issuance obligation for purely foreign, non-established suppliers without an Ecuadorian RUC, whose transactions are instead addressed through import IVA at customs, withholding and liquidaciones de compra [11][7]. Cross-border digital-services taxation should be confirmed against current SRI guidance where relevant [7].

4.3 Voluntary participation

Before their phase-in, smaller taxpayers could voluntarily request authorization to issue electronic comprobantes; today the SRI authorizes issuers de oficio (automatically) rather than on request, and negocios populares may opt into electronic facturas voluntarily [22][1].

4.4 Sector-specific rules & RIMPE

The RIMPE (Régimen Simplificado para Emprendedores y Negocios Populares) splits small taxpayers into two categories: negocios populares (annual turnover ≤ USD 20,000), who may keep issuing physical notas de venta and are not obliged to e-invoice except on request; and emprendedores (up to USD 300,000), who must issue electronic comprobantes [8][34]. Historically the earliest mandated sectors were financial institutions, credit-card issuers, telecoms, exporters and the public sector (Chapter 5) [22].

Chapter 5 — Implementation Timeline

5.1 Legislative history & milestones

2012 — NAC-DGERCGC12-00105: electronic issuance opened as a voluntary/pilot scheme (~38 companies issued the first signed comprobantes) [22][34].
2013 — NAC-DGERCGC13-00236: implementation timeline for mandatory adoption established [2].
2014–2015 — phased mandate by group: credit-card issuers, financial institutions, telecoms, qualified exporters, additional contribuyentes especiales, e-commerce and the public sector [22][2].
2017–2018 — extension to state suppliers, medium enterprises and mining/alcohol/sugar sectors; importers and customs agents from June 2018 [2].
1 Jan 2018 — migration to the offline self-authorization scheme (NAC-DGERCGC18-00000233) [14][24].
31 Dec 2019 — Ley de Simplificación y Progresividad Tributaria reforms Art. 103 LRTI (general e-invoicing rule) and creates RIMPE [9].

5.2 Voluntary / pilot phases

The 2012–2013 voluntary phase allowed taxpayers to request authorization to issue electronic comprobantes before their group’s mandatory date, supported by SRI test environments and free tools [34][5].

5.3 Mandatory go-live — the universal deadline

The Ley de Desarrollo Económico y Sostenibilidad Fiscal (published 29 November 2021) drove the universal mandate, operationalised by NAC-DGERCGC22-00000024 (published 27 May 2022): from 29 November 2022, essentially all RUC holders obliged to issue comprobantes de venta, retención and complementary documents must do so electronically; around 2 million taxpayers (~88% of RUC holders) migrated [10][13][36].

5.4 Grace periods & transitional provisions

RIMPE negocios populares remained on physical notas de venta as the main transitional carve-out, and force-majeure pre-printed documents were capped at 1% of issuances [32][2]. Withholding agents had to move both to electronic comprobantes de retención and the ATS annex by the same 29 November 2022 date [2].

5.5 Transmission-deadline evolution (a live development)

Historically: within 72 hours to transmit the signed XML to the SRI after issuance under the offline scheme [29].
November 2024: extended to 4 business days by SRI Boletín 061 during the national electrical emergency [29].
From 1 January 2026: real-time / immediate transmission required (NAC-DGERCGC25-00000017), eliminating the deferred window; the offline architecture (self-generated clave de acceso as authorization number) is retained, but the timing changes [15][27].

5.6 Recent correction & sanction reforms

The Ley de Eficiencia Económica y Generación de Empleo (R.O. Sup. 461, 20 December 2023) added graduated fines for non-issuance/non-transmission, implemented by NAC-DGERCGC24-00000022 (Chapter 14) [17]. Resolution NAC-DGERCGC25-00000014 (effective 1 August 2025) tightened voucher annulment, and from 2026 final-consumer B2C invoices can no longer be cancelled [16][27].

Chapter 6 — Operating Model (How It Really Works)

6.1 Model type & role of the tax authority

Ecuador uses a CTC clearance model in the offline (self-authorization) variant: the taxpayer generates its own 49-digit clave de acceso, which itself is the authorization number, issues and delivers the document, and transmits the signed XML to the SRI for authorization [14][3]. The SRI validates the XML and returns a state (RECIBIDA, then AUTORIZADO or NO AUTORIZADO); it authorizes issuers de oficio and no longer requires a prior request to become an e-issuer [3][22]. From 1 January 2026 the transmission must be immediate/real-time [15].

6.2 Invoice lifecycle

XML generation — including the 49-digit clave de acceso [3].
Signature — the XML is signed with a XAdES-BES electronic signature (RSA-SHA1, 2048-bit, PKCS#12 .p12 certificate) [3].
Reception — the signed XML is sent to the SRI web service, returning RECIBIDA (or DEVUELTA on structural rejection) [3].
Authorization — the SRI returns AUTORIZADO, NO AUTORIZADO or EN PROCESAMIENTO (stated maximum processing time 24 hours) [3].
Delivery — the RIDE plus the authorized XML is delivered to the buyer (e.g. by email) [3].

6.3 Authentication & digital signature

Issuance requires a valid firma electrónica — a digital certificate (.p12 file or token) from a certification authority accredited by ARCOTEL (e.g. Banco Central/ECIBCE, Security Data, ANF AC, Uanataca, Consejo de la Judicatura) [21][3]. The signature standard is XAdES-BES (enveloped, RSA-SHA1, 2048-bit) [3].

6.4 Offline / contingency mode

The offline scheme is itself the contingency-tolerant design: because the self-generated clave de acceso is the authorization number, a document is valid on delivery even before the SRI has authorized it, with transmission following within the applicable window [3][29]. From 1 January 2026 the standard becomes real-time transmission, so genuine contingencies (connectivity loss) rely on prompt catch-up transmission once service resumes [15][27].

6.5 Buyer-side workflow

The buyer receives the RIDE and authorized XML and can verify authenticity through SRI en Línea (validez de comprobantes) [6]. Only a valid, authorized comprobante supports the buyer’s IVA input credit (Art. 66 LRTI) and expense deduction (Art. 10 LRTI), so buyers have a direct incentive to confirm authorization [20]. Receivers get 5 business days to accept or reject credit notes, debit notes and withholding vouchers [28].

6.6 Clave de acceso & RIDE

The clave de acceso is a 49-digit key encoding the emission date, document type, issuer RUC, environment (test/production), establishment and emission-point series, sequential number, a random numeric code, the emission type and a check digit [3][48]. The RIDE (Representación Impresa del Documento Electrónico) is the printed/PDF representation with full tax and legal validity, carrying a GS1-128 barcode with the clave de acceso [3][24].

Chapter 7 — Acceptable E-Invoice Formats

7.1 Mandatory format(s)

The mandatory format is XML per the SRI-defined XSD schemas in the Ficha Técnica de Comprobantes Electrónicos, Esquema Offline (current version v2.32, November 2025); the XML is the legally valid original and the RIDE its printed representation [4][3]. Six document types are supported: factura (01), liquidación de compra (03), nota de crédito (04), nota de débito (05), guía de remisión (06) and comprobante de retención (07) [3][22].

7.2 Relationship to international standards

Ecuador’s XML is a national SRI schema and does not implement EN 16931, Peppol, UBL or UN/CEFACT CII [24][22]. There is no CIUS. For multinationals this is a bespoke national integration rather than a plug-in to a Peppol/EN 16931 landscape, though it is conceptually similar to other LATAM XML clearance schemas [44].

7.3 Voluntary / legacy / hybrid formats

No hybrid PDF/XML formats (Factur-X, ZUGFeRD) are used; the RIDE is a representation of the XML, not an independent legal document. Pre-printed paper vouchers survive only in narrow contingency (capped at 1% of issuances) and for negocios populares’ notas de venta [32][2].

7.4 Attachments

The public materials focus on the XML schema and RIDE; a formal attachment framework beyond the RIDE and XML is not separately detailed in the accessible sources and, where relevant, should be confirmed against the SRI Ficha Técnica [3][4].

Chapter 8 — Technical & Functional Requirements

8.1 E-invoice specifications

Mandatory data (per the XSD infoTributaria/infoFactura blocks) includes the issuer RUC and razón social/nombre comercial, establishment address, clave de acceso, document code/number, environment and emission type, buyer identification (type and number), line items, the IVA tax breakdown by rate/code, totals and forma de pago; the definitive field lists are the SRI XSD schemas [3]. IVA is coded at the applicable rate (15% standard; 5% reduced; 0%) [7].

8.2 E-reporting specifications

IVA is declared on Formulario 104 (monthly, or semi-annual for certain taxpayers), and transactional detail is reported through the Anexo Transaccional Simplificado (ATS) — a free online annex reporting purchases, sales, withholdings and exports [3][12]. As e-invoicing coverage approached universality, the e-invoice XML became the authoritative transactional record the SRI already holds, feeding reconciliation and reporting [12][3].

8.3 Digital signature & integrity

Integrity and authenticity rest on the mandatory XAdES-BES electronic signature (enveloped, RSA-SHA1, 2048-bit, PKCS#12 certificate from an ARCOTEL-accredited CA), so each XML is cryptographically bound to its issuer and tamper-evident, and the SRI authorization state confirms validity [3][21].

8.4 Processing mode & performance

Under the offline scheme the document is valid on issuance (self-authorized via the clave de acceso) with SRI authorization returned within a stated maximum of 24 hours; from 1 January 2026 transmission to the SRI must be immediate/real-time, moving the system toward near-continuous reporting [3][15].

Chapter 9 — Correction of Errors

9.1 E-invoice corrections

Corrections use electronic notas de crédito (código 04) — reducing or annulling a prior invoice for returns, discounts or corrections — and notas de débito (código 05) — increasing a prior invoice for interest or additional charges; each references the original document [3][11]. Under the 2025 reforms, voucher annulment (anulación) must occur by the 7th of the following month (previously the 10th), credit notes may only be issued in cases defined by regulation, and from 1 January 2026 e-invoices issued to a final consumer (consumidor final) cannot be cancelled [16][27]. Receivers have 5 business days to accept or reject credit notes, debit notes and withholding vouchers [28].

9.2 E-reporting corrections

Because comprobantes feed the ATS and the IVA return, corrective notes flow into the taxpayer’s reporting; general amended-return and assessment rules under the Código Tributario and LRTI apply, and an unauthorized or non-transmitted voucher is invalid for both output and input purposes [17][20]. The monthly IVA cycle (Formulario 104) governs the timing of corrective declarations [3].

Chapter 10 — Transmission & Workflow

10.1 Central platform

The central platform is the SRI, which receives, authorizes and stores comprobantes electrónicos and exposes web services for reception and authorization; public verification is via SRI en Línea [3][6].

10.2 Transmission channels

There are three issuance routes: (a) the free SRI online tool (Facturador SRI / SRI en Línea); (b) the free downloadable desktop tool; and (c) own or third-party software consuming the SRI SOAP web services (RecepcionComprobantesOffline and AutorizacionComprobantesOffline, with separate production and test endpoints) [5][3]. The free tools are available to all taxpayers except *grandes contribuyentes* [8].

10.3 Accredited providers / certification

Ecuador has no PAC/OSE-style licensing of e-invoicing agents (it is a self-authorization model); software vendors act as technology facilitators that homologate with the SRI schema [24][22]. The regulated accreditation that does matter is the firma electrónica certificate, issued by ARCOTEL-accredited certification authorities [21].

10.4 Interoperability with B2G / Peppol / cross-border

B2G supplies use the same comprobante electrónico channels (with the USD 1,000 State-transaction threshold reinforcing electronic receipts); there is no Peppol interoperability or cross-border e-invoice exchange [2][24]. Cross-border goods flows are handled through Customs [11].

10.5 Deadlines & timing

Issuance is immediate via the self-generated clave de acceso; transmission to the SRI evolved from 72 hours → 4 business days (Nov 2024) → real-time from 1 January 2026 [29][15]. The IVA return (Formulario 104) is filed monthly (or semi-annually for certain taxpayers), with the ATS annex on its own schedule [3][12].

Chapter 11 — Self-Billing

Ecuador’s functional equivalent of self-billing is the liquidación de compra de bienes y prestación de servicios (código 03) — an electronic document the buyer issues to document a purchase from a supplier who is not obliged or able to issue their own comprobante (e.g. certain non-registered persons), self-documenting the transaction and any related withholding [11][3]. This is a defined SRI document type with its own XSD schema, transmitted and authorized like other comprobantes [3]. Beyond the liquidación de compra, the public sources do not document a general recipient-created-invoice (self-billing) regime for ordinary B2B supplies; where a specific self-billing arrangement is contemplated it should be confirmed against the RCVRDC and current SRI guidance [11]. The sub-topics of a classic self-billing regime — platform routing, prior authorisation, a self-billing flag, foreign-buyer restrictions and buyer-side approval — are therefore addressed, to the extent they exist, through the liquidación de compra mechanics rather than a distinct self-billing framework [11][3].

Chapter 12 — Triangulation & Special Scenarios

12.1 Triangulation

Triangulation is not separately addressed in the accessible public SRI sources; the comprobante obligation attaches to each Ecuadorian issuer’s supply, so each domestic leg is invoiced electronically where it occurs, and cross-border legs follow import/export and withholding rules rather than a dedicated triangulation mechanism — to be confirmed with the SRI/advisers for specific structures [11][7].

12.2 Chain transactions

Chain-transaction sequencing likewise has no dedicated comprobante treatment in the public materials; each domestic supply is documented as an ordinary factura where it occurs in Ecuador [11][7].

12.3 Withholding & reverse-charge-type mechanisms

Rather than an EU-style reverse charge, Ecuador operates an extensive withholding regime (retenciones de IVA and income tax) documented through electronic comprobantes de retención (código 07); withholding percentages are set by SRI resolution (e.g. NAC-DGERCGC24-00000008 after the IVA-rate change) and the retention voucher is a core part of the electronic ecosystem [17][7]. Import IVA is settled at customs [11].

12.4 Zero-rated & exempt supplies

Standard IVA is 15%; tarifa 0% covers basic foods, agricultural inputs, medicines, education, health and exports, and certain transfers are no objeto (out of scope); a factura is still issued electronically with the appropriate IVA code, and a reduced 5% applies to some construction materials [7][19].

12.5 Local nuances

Distinctive Ecuadorian features include the RIMPE small-taxpayer split (Chapter 4), the Galápagos exemption for residents without mainland operations, the extensive electronic retenciones regime, and occasional temporary IVA rates set by decree (e.g. an 8% tourism-sector rate on specific holiday weekends) [2][7]. These follow the general LRTI/IVA framework and are captured within the standard comprobante types [7].

Chapter 13 — Archiving & Retention

13.1 Central storage by the SRI

Authorized comprobantes are received and stored by the SRI, which holds the authoritative transactional record and exposes it for verification through SRI en Línea [3][6].

13.2 Mandatory archiving format

The legally valid original is the signed XML; the RIDE is its printed representation. Taxpayers retain the XML (not merely the RIDE) as the document of record [3][22].

13.3 Retention period

Both issuer and receiver must archive the electronic vouchers (XML) for at least 7 years, consistent with the general books-and-records retention obligation under Ecuadorian tax law [22][3].

13.4 Storage location

The reviewed sources do not impose a specific domestic-only storage mandate beyond the retention obligation; the taxpayer must be able to produce the authorized XML on request within the seven-year window, and the SRI independently holds the authorized records [22][3].

13.5 Integrity, authenticity, readability

Integrity and authenticity are assured by the mandatory XAdES-BES signature and the SRI authorization; the RIDE’s GS1-128 barcode with the clave de acceso links the printed representation back to the authorized XML for verification [3][24].

13.6 Audit accessibility

Because the SRI holds the authorized comprobantes centrally, much audit access is platform-based; taxpayers nonetheless retain and produce the XML records on request within the seven-year period [3][22].

Chapter 14 — Penalties & Enforcement

14.1 Business closure (clausura)

Failure to issue comprobantes de venta, or issuing them without the legal/regulatory requirements, is sanctioned by clausura (temporary closure) of the establishment for 7 days, under the Ley para la Reforma de las Finanzas Públicas (Ley 99-24, Disposición General Séptima) operating with the Código Tributario; reincidence can extend closure [18][34].

14.2 Monetary fines (non-issuance / non-transmission)

A provision added after Art. 103 LRTI by the Ley de Eficiencia Económica y Generación de Empleo (R.O. Sup. 461, 20 December 2023), implemented by Resolución NAC-DGERCGC24-00000022, introduced graduated fines of 1 to 30 unified basic salaries (RBU) for non-issuance/non-delivery and non-transmission of electronic comprobantes [17][30]. The scale rises by taxpayer type — for example roughly 20 RBU (non-issuance) / 30 RBU (non-transmission) for grandes contribuyentes, 10/15 RBU for contribuyentes especiales, 7/10 RBU for sociedades obligated to keep accounts, 4/5 RBU for personas naturales, and 1/1 RBU for RIMPE negocios populares and unregistered persons; at the 2026 RBU (unified basic salary) the top figure is on the order of USD 14,000+ [30][31]. Exact lower-tier figures should be confirmed against the Registro Oficial text [17].

14.3 Contravenciones, faltas reglamentarias & loss of tax rights

Invoicing failures are also sanctioned as contravenciones and faltas reglamentarias under the Código Tributario (fixed USD amounts by taxpayer type) [30]. The most significant commercial consequence is that an unauthorized or non-transmitted comprobante is invalid: it does not support IVA input credit (Art. 66 LRTI) or expense deductibility (Art. 10 LRTI), so the enforcement bite combines penalty exposure with loss of the buyer’s tax rights [20][11].

14.4 Article references & links

The governing instruments are the LRTI (Arts. 10, 66 and 103), the RCVRDC, the Ley 99-24 (clausura), the Ley de Eficiencia Económica y Generación de Empleo (2023) and Resolución NAC-DGERCGC24-00000022, with amounts scaling to the annual unified basic salary (RBU) [20][18][17]. Named-advisor analyses (jezl-auditores, PBP Law) provide the current fine tables [30][31].

Chapter 15 — Pre-Filled VAT (IVA) Returns

15.1 Available today?

Directionally yes, but confirm the mechanism. The SRI already holds every authorized comprobante as the authoritative transactional record and operates the ATS annex, which positions it to feed pre-populated (“declaración sugerida”) returns; however, the accessible public sources do not establish a single binding SRI rule that the IVA return (Formulario 104) is automatically pre-filled solely from e-invoice data, so this should be verified against current SRI guidance before being relied upon as a hard rule [3][12].

15.2 Fields pre-filled vs input required

What is well-sourced is that (a) the e-invoice XML is the authoritative transactional record the SRI already holds, and (b) the ATS remains the formal transactional annex reporting sales, purchases, withholdings and exports; these feed reconciliation of the IVA return [12][3].

15.3 Announced plans & timeline

The move to real-time transmission from 1 January 2026 increases the timeliness and completeness of the data available for pre-population, consistent with the broader LATAM trend toward suggested returns, though no distinct dated SRI “fully pre-filled IVA return” project was confirmed in the reviewed sources [15][12].

15.4 Dependency on e-invoicing/e-reporting data

Any pre-population depends wholly on authorized comprobante data and the ATS; only valid, authorized vouchers count for IVA and deductions, so the quality of the pre-fill tracks e-invoicing coverage and accuracy [20][3].

15.5 Alignment with ViDA pre-filled provisions

ViDA does not apply to Ecuador (Chapter 16); nonetheless, the real-time-data-to-return direction is conceptually consistent with modern CTC systems’ move toward suggested/pre-filled returns [15][43].

Chapter 16 — ViDA / International Digital Reporting Readiness

16.1 Country position

ViDA is N/A — Ecuador is a non-EU country and the EU VAT in the Digital Age package (adopted 11 March 2025) binds EU Member States only [43]. Benchmarked against OECD/LATAM CTC trends, Ecuador is a mature clearance-model adopter and, with real-time transmission from 2026, is tightening toward near-continuous reporting [44][15].

16.2 Alignment of national format & model

Ecuador uses a national SRI XML clearance model with XAdES-BES signatures and a self-generated access key, and is not aligned with ViDA’s Digital Reporting Requirements, EN 16931, Peppol or UBL — the principal gap for organisations pursuing a single global standard [24][22]. Its kinship is regional (LATAM XML clearance schemas) rather than European [44][45].

16.3 Cross-border digital reporting & regional peers

Ecuador does not participate in ViDA’s cross-border B2B digital reporting or any equivalent supranational feed; the system is domestic, with cross-border flows through Customs [43][11]. Among LATAM peers it sits alongside Chile, Brazil (NF-e), Mexico (CFDI), Peru, Colombia and Argentina — behind the earliest/most granular systems (Brazil, Mexico, Chile) but a mature adopter moving to real-time reporting [44][46].

16.4 Business implications

For multinationals, the Ecuadorian solution is a bespoke national integration (SRI XSD, XAdES-BES signature, ARCOTEL certificate) not reusable as a Peppol/ViDA build; the January 2026 real-time rule and the strict authorization-for-credit link make robust, resilient SRI integration and certificate management the key future-proofing steps [22][15].

Chapter 17 — Impact on SMEs and Startups

17.1 Phased onboarding & the RIMPE carve-out

SMEs were phased in through 2014–2022 and are now broadly covered; the key SME nuance is RIMPE, under which negocios populares (≤ USD 20,000) are not obliged to e-invoice (they may issue physical notas de venta, electronic only on request), while emprendedores (≤ USD 300,000) must e-invoice [8][34].

17.2 Free / low-cost government tools & education

The SRI provides the Facturador SRI (free online and downloadable desktop tools) to all taxpayers except grandes contribuyentes, supporting facturas, notas de crédito/débito, retenciones, guías de remisión and liquidaciones [5][8]. Public validation and taxpayer guidance are available through SRI en Línea and the SRI portal [6][1].

17.3 Simplified regimes & threshold exemptions

The RIMPE regime taxes negocios populares on a small progressive fixed quota and emprendedores on a progressive table, easing the small-trader burden; negocios populares’ exemption from mandatory e-invoicing is the principal simplification within the e-invoicing mandate itself [8][34].

17.4 Subsidies, tax credits, grants

No dedicated subsidy or grant for e-invoicing adoption was identified; affordability rests on the free SRI tools plus low-cost private options, with the digital certificate being the main unavoidable cost [5][39].

17.5 Compliance costs

The principal cost driver is the firma electrónica certificate: official/market rates run from roughly USD 16–60 (e.g. ~USD 19.80 for a two-year ICERT-EC certificate), renewable periodically; SME invoicing software plans start around USD 6.99/month, while the SRI tools are free [39][42]. Connectivity becomes more important under the 2026 real-time rule [15].

17.6 Cash-flow & operational benefits

Benefits include recognised tax documents that secure IVA credit and deductions, faster reconciliation, and reduced paper handling; the electronic retención vouchers streamline Ecuador’s extensive withholding administration [20][17].

17.7 Net administrative burden vs simplification

The balance is mixed: mature, well-tooled and broadly adopted, but with a real certificate cost, an extensive withholding regime to operate, and the higher connectivity bar of real-time transmission from 2026 [39][15].

17.8 Market & competitive impact

The authorization-for-credit link advantages compliant, authorized issuers in B2B markets, since buyers need a valid authorized comprobante to claim IVA and deductions [20][11].

17.9 Official assessments of SME readiness

The SRI’s staged rollout and free tools, and the ~88% migration achieved by the 2022 universal deadline, indicate high overall readiness, with negocios populares deliberately kept on a lighter regime [36][8].

Chapter 18 — Practical Implementation Considerations

18.1 ERP / finance-system impacts

Larger businesses integrate their ERP with the SRI web services (directly or via a provider): SAP (Document Compliance / partners, with a documented Ecuador offline-model transition), Microsoft Dynamics 365 (partner localizations) and Oracle (via middleware such as EDICOM, Sovos or Gosocket), alongside local ERPs like Contifico/Siigo [22][24]. The 2026 real-time rule raises the importance of resilient, low-latency SRI connectivity [15].

18.2 Master-data prerequisites

Key prerequisites are a valid RUC, a firma electrónica certificate from an ARCOTEL-accredited CA, correct establishment/emission-point series for the clave de acceso, buyer identification data, and IVA rate/withholding configuration; there are no Peppol IDs, as Peppol is not used [3][21][24].

18.3 Common pitfalls in early rollout

Documented pitfalls include lapsed or misconfigured digital certificates (blocking valid signatures), missing or late SRI transmission (now real-time from 2026), incorrect clave de acceso construction, mishandling annulment deadlines (by the 7th of the following month; no cancellation of final-consumer B2C from 2026), and treating the RIDE rather than the XML as the document of record [3][16][27].

18.4 Vendor / service-provider landscape

Because Ecuador has no PAC/OSE licensing, providers are technology facilitators that homologate with the SRI schema; active vendors include EDICOM, Datil, Contifico/Siigo, The Factory HKA, Gosocket, Facturero Móvil, GroupSeres and Sovos, among others [23][40][41][42]. ERP localizations exist for SAP, Dynamics 365 and Oracle via partners/middleware [22][24].

18.5 Governance & internal control

Because the SRI holds the authorized record, internal controls should cover certificate lifecycle management (issuance, renewal, custody), monitoring of transmission/authorization states (RECIBIDA/AUTORIZADO), reconciliation of comprobantes to the ATS and the IVA return, disciplined handling of notas de crédito/débito and annulment windows, and validation that suppliers’ comprobantes are authorized before claiming IVA credit [3][20][28].

Chapter 19 — Summary & Key Takeaways

19.1 Scope

Domestic B2B/B2G/B2C plus exports for essentially all RUC holders obliged to issue comprobantes; RIMPE negocios populares and Galápagos residents (without mainland operations) are the main carve-outs [13][2].

19.2 Format

National SRI XML (XSD, Ficha Técnica v2.32) with XAdES-BES signature, 49-digit clave de acceso and RIDE; no Peppol/EN 16931 [3][24].

19.3 Timeline

Pilot 2012; phased 2014–2018; offline scheme 2018; universal mandate 29 Nov 2022; transmission 72h → 4 days (Nov 2024) → real-time from 1 Jan 2026 [22][13][15].

19.4 How it works

Offline self-authorization: the taxpayer’s 49-digit clave de acceso is the authorization number; XML is signed, delivered (RIDE + XML) and transmitted to the SRI, now in real time [14][3].

19.5 Key obligations

Hold a valid firma electrónica, issue authorized XML comprobantes for every supply, transmit in real time (from 2026), operate the electronic retención regime, retain XML seven years, and file the IVA return (Formulario 104) with the ATS [21][3][22].

19.6 Main risks

Real-time-transmission resilience, tighter annulment/correction rules, certificate lifecycle, and loss of IVA credit/deductions for unauthorized vouchers [15][16][20].

19.7 SME implications

Free SRI tools lower the barrier; negocios populares exempt from mandatory e-invoicing; main cost is the digital certificate (~USD 16–60) [5][39].

19.8 ViDA / international readiness

ViDA N/A; mature LATAM clearance model, non-interoperable with Peppol/EN 16931; domestic-only [43][44].

19.9 Critical dates & next steps (actionable)

In force now (from 1 Jan 2026): real-time transmission to the SRI — verify system latency, retry logic and contingency handling [15].
Standing controls: manage firma electrónica renewals; validate supplier authorization before claiming IVA credit; respect annulment by the 7th of the following month and the no-cancellation rule for final-consumer B2C [21][16].
Verify with SRI/advisers: any pre-filled IVA-return mechanism, self-billing beyond liquidaciones de compra, and the exact lower-tier fine figures against the Registro Oficial [12][11][17].

Chapter 20 — Official References & Sources

All URLs were checked during research on the information cut-off date, 6 July 2026. Sources flagged [>12 months] are older than 12 months and used for historical/background context (they remain the primary record for the events they describe). Where a primary text was a scanned PDF or a figure varied across sources, the position is identified in the body text and the caveat disclosed. Numbering [1]–[48] is stable across the booklet; [49] is the verification note.

20.1 Government portals (SRI, ARCOTEL, gob.ec)

[1] Facturación Electrónica (comprobantes electrónicos; legal validity; de-oficio authorization). SRI — Servicio de Rentas Internas, accessed 2026. https://www.sri.gob.ec/facturacion-electronica

[2] Contribuyentes obligados a emitir comprobantes electrónicos (phased calendar; scope; exemptions). SRI — Servicio de Rentas Internas, accessed 2026. https://www.sri.gob.ec/en/contribuyentes-obligados-a-emitir-comprobantes-electronicos

[3] Ficha Técnica — Comprobantes Electrónicos Esquema Off-line (lifecycle, clave de acceso, signature, web services, RIDE). SRI — Servicio de Rentas Internas, accessed 2026. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar/fb95cafc-a8ca-4a4c-afb6-12c4153165f0/FICHA%20TECNICA%20COMPROBANTES%20ELECTR%C3%93NICOS%20ESQUEMA%20OFFLINE.pdf

[4] Ficha Técnica Esquema Offline v2.32 (November 2025). SRI — Servicio de Rentas Internas, Nov 2025. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar/29562323-2e76-42f5-abb6-cb7ac542c3c6/

[5] Facturador SRI (free online & desktop tool). SRI — Servicio de Rentas Internas, accessed 2026. https://www.sri.gob.ec/facturador-sri

[6] SRI en Línea — validez de comprobantes electrónicos. SRI — Servicio de Rentas Internas, accessed 2026. https://srienlinea.sri.gob.ec/comprobantes-electronicos-internet/

[7] Impuesto al Valor Agregado (IVA) — rates, 0%, withholding. SRI — Servicio de Rentas Internas, accessed 2026. https://www.sri.gob.ec/en/impuesto-al-valor-agregado-iva

[8] RIMPE — Régimen Simplificado para Emprendedores y Negocios Populares. SRI — Servicio de Rentas Internas, accessed 2026. https://www.sri.gob.ec/en/rimpe

[9] Ley Orgánica de Simplificación y Progresividad Tributaria (Art. 103 LRTI; RIMPE). SRI — Servicio de Rentas Internas, 2019/2020. https://www.sri.gob.ec/en/ley-organica-de-simplificacion-y-progresividad-tributaria

[10] Ley Orgánica para el Desarrollo Económico y Sostenibilidad Fiscal tras la Pandemia COVID-19 (universal mandate driver). SRI — Servicio de Rentas Internas, 2021. https://www.sri.gob.ec/en/ley-organica-para-el-desarrollo-economico-y-sostenibilidad-fiscal-tras-la-pandemia-covid-19

[11] Reglamento de Comprobantes de Venta, Retención y Documentos Complementarios (RCVRDC). SRI — Servicio de Rentas Internas, accessed 2026. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar/c3a2c922-5960-4c08-9a73-bde19fadce42/REGLAMENTO+DE+COMPROBANTES+DE+VENTA,+RETENCI%D3N+Y+DOCUMENTOS+COMPLEMENTARIOS.pdf

[12] Anexo Transaccional Simplificado (ATS) — trámite. gob.ec / SRI, accessed 2026. https://www.gob.ec/sri/tramites/anexo-transaccional-simplificado-ats

[21] Entidades de certificación de firma electrónica (accredited CAs). ARCOTEL, accessed 2026. https://www.arcotel.gob.ec/entidades-de-certificacion-firma-electronica/

20.2 SRI resolutions & legislation (Resoluciones NAC-DGERCGC; leyes)

[13] Resolución NAC-DGERCGC22-00000024 (universal mandate; deadline 29 Nov 2022). SRI — Servicio de Rentas Internas, 27 May 2022. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar?id=c508d69a-4ea4-4940-8777-fbe89fef2fac&nombre=NAC-DGERCGC22-00000024.pdf [>12 months]

[14] Resolución NAC-DGERCGC18-00000233 (esquema offline). SRI — Servicio de Rentas Internas, 2018. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar/32be159b-8d66-47ad-86da-4d674321da7a/NAC-DGERCGC18-00000233.pdf [>12 months]

[15] Resolución NAC-DGERCGC25-00000017 (real-time transmission from 1 Jan 2026). SRI — Servicio de Rentas Internas, Jul 2025. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar?id=e98fc8a6-299e-4ea9-8de7-2f6c70dbb4f5&nombre=NAC-DGERCGC25-00000017.pdf

[16] Resolución NAC-DGERCGC25-00000014 (anulación; effective 1 Aug 2025). SRI — Servicio de Rentas Internas, 27 Jun 2025. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar?id=137046a6-787c-47fb-a2d7-176595d292dc&nombre=NAC-DGERCGC25-00000014.pdf

[17] Resolución NAC-DGERCGC24-00000022 (sanciones — non-issuance/non-transmission fines). SRI — Servicio de Rentas Internas, 2024. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar?id=02272baf-02db-4b03-bf07-67b85a46629b&nombre=NAC-DGERCGC24-00000022.pdf [>12 months]

[18] Ley para la Reforma de las Finanzas Públicas (Ley 99-24 — clausura 7 días). SRI (official PDF), 1999. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar/a61140b6-ada9-4cc4-9d08-de6b0148f3b7/LEY+PARA+LA+REFORMA+DE+LAS+FINANZAS+P%DABLICAS.pdf [>12 months]

[19] Ley Orgánica para Enfrentar el Conflicto Armado Interno (IVA raised to 15%, 1 Apr 2024). SRI (official PDF), 12 Mar 2024. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar/f03ecb3a-1e12-412a-bf42-8e4c8efe746c/Ley_enfrentar_Conflicto_Armado_publicado12032024.pdf [>12 months]

[20] LRTI Art. 10 (Deducciones) — deductibility requires valid comprobantes (with Art. 66 IVA credit). SRI (official PDF), accessed 2026. https://www.sri.gob.ec/o/sri-portlet-biblioteca-alfresco-internet/descargar/b1055d62-8021-4a3c-9679-58f9c8cd38f7/Art.+10+Deducciones.pdf

20.3 Advisor, legal & technology publications

[22] Factura electrónica en Ecuador: requisitos, normativa (history; offline scheme; 2026 real-time). EDICOM, upd. 25 Nov 2025. https://edicomgroup.com/blog/electronic-invoicing-in-ecuador

[23] Electronic invoicing in Ecuador — country page (providers; 7-year archiving). EDICOM, accessed 2026. https://edicomgroup.com/electronic-invoicing/ecuador

[24] Electronic invoicing in Ecuador (country page; XML/XSD; GS1-128 RIDE barcode). Sovos, upd. 23 May 2025. https://sovos.com/vat/tax-rules/electronic-invoicing-in-ecuador/

[25] 4 Key Changes in Ecuador’s New Offline E-Invoicing Model (self-generated access key). Sovos, 2017/2019. https://sovos.com/blog/vat/4-key-changes-in-ecuadors-new-offline-e-invoicing-model/ [>12 months]

[26] Ecuador: cambios en la normativa de facturación electrónica (nov 2022; negocios populares). Sovos SSA, 4 Jul 2022. https://sovos.com/es/cambios-regulatorios/iva/ecuador-cambios-normativa-facturacion-electronica-entran-vigor-noviembre-2022/ [>12 months]

[27] SRI: actualización normativa (Resolución NAC-DGERCGC25-00000017; deadlines; annulment). HLB Ecuador, 2025. https://www.hlbecuador.com/sri-actualizacion-en-la-normativa-de-comprobantes-electronicos-resolucion-nac-dgercgc25-00000017/

[28] Plazos del SRI para los comprobantes electrónicos en Ecuador (5-day receiver window; 2026). GroupSeres, 11 Mar 2026. https://blog.groupseres.com/latam/plazos-del-sri-para-los-comprobantes-electronicos-en-ecuador

[29] SRI extiende plazos para la facturación electrónica (72h → 4 días history). Facturero Móvil, 2024. https://www.factureromovil.com/articulos/sri-extiende-plazos-para-la-facturacion-electronica-en-ecuador-lo-que-debes-saber/b [>12 months]

[30] Multa por no entrega de comprobantes (fine table by taxpayer type). jezl-auditores, 2026. https://www.jezl-auditores.com/index.php/tributario/122-multa-por-no-entrega-de-comprobantes

[31] SRI emite normas para sanciones por falta de entrega y transmisión de comprobantes. PBP Law, 2024. https://www.pbplaw.com/publicaciones/sri-emite-normas-para-la-aplicacion-de-sanciones-por-la-falta-de-entrega-y-transmision-de-comprobantes-de-venta/ [>12 months]

[32] Emisión obligatoria de comprobantes bajo modalidad electrónica (2022 alert; negocios populares; 1% contingency). Sempértegui Abogados, 6 Jun 2022. https://www.sempertegui.com/alertas/emision-obligatoria-de-comprobantes-de-venta-retencion-y-documentos-complementarios-bajo-la-modalidad-electronica/ [>12 months]

[33] IVA 15% en Ecuador para 2025 (rate maintained). NMS Law, 9 Dec 2024. https://nmslaw.com.ec/blog/2024/12/09/iva-15-ecuador-2025/ [>12 months]

[34] Obligados a facturar electrónicamente (history; resolutions; clausura). Siigo / Contifico, accessed 2026. https://www.siigo.com/ec/blog/contabilidad-y-finanzas/obligados-a-facturar-electronicamente

[35] Ecuador — Other taxes (VAT/IVA overview). PwC Worldwide Tax Summaries, accessed 2026. https://taxsummaries.pwc.com/ecuador/corporate/other-taxes

[39] Precios de firma electrónica (certificate cost range). firmar.ec, 2026. https://firmar.ec/precios/

[40] Datil — facturación electrónica (authorized provider). Datil, accessed 2026. https://datil.com/

[41] The Factory HKA Ecuador — facilitador tecnológico (FAQs; 7-yr storage). The Factory HKA, accessed 2026. https://www.thefactoryhka.com.ec/preguntas-frecuentes/

[42] Todo sobre la factura electrónica en Ecuador (provider network). Gosocket, accessed 2026. https://gosocket.net/todo-sobre-la-factura-electronica-ecuador/

20.4 Media, comparative & tracker references

[36] Facturación electrónica es obligatoria desde noviembre de 2022 (~2M taxpayers). Primicias, 25 Jun 2022. https://www.primicias.ec/noticias/economia/facturacion-electronica-obligatoria-noviembre/ [>12 months]

[37] Transmisión de facturas electrónicas al SRI obligatoria desde enero 2026. Primicias, 30 Dec 2025. https://www.primicias.ec/economia/transmision-facturas-electronicas-sri-obligatoria-enero2026-112780/

[38] Facturación electrónica ya es obligatoria en Ecuador (2022; physical vouchers still valid). El Universo, 2022. https://www.eluniverso.com/noticias/economia/facturacion-electronica-ya-es-obligatoria-en-ecuador-que-comprobantes-fisicos-siguen-teniendo-vigencia-nota/ [>12 months]

[43] Adoption of the VAT in the Digital Age (ViDA) package (11 March 2025). European Commission — Taxation and Customs Union, 11 Mar 2025. https://taxation-customs.ec.europa.eu/news/adoption-vat-digital-age-package-2025-03-11_en

[44] Electronic Invoicing in Latin America (Barreix & Zambrano). Inter-American Development Bank (IADB), 2018. https://publications.iadb.org/publications/english/document/Electronic-Invoicing-in-Latin-America.pdf [>12 months]

[45] Electronic invoicing — a Latin American innovation with global reach. CIAT, accessed 2026. https://www.ciat.org/electronic-invoicing-a-latin-american-innovation-with-global-reach/?lang=en

[46] E-invoicing and CTC models (clearance taxonomy). Pagero / Thomson Reuters, accessed 2026. https://europe.thomsonreuters.com/blog/e-invoicing-ctc-models

[47] User-supplied reference — E-invoicing Developments Tracker (Ecuador entry). VATupdate.com, 9 Sep 2025. https://www.vatupdate.com/2025/09/09/e-invoicing-developments-tracker/

[48] Clave de acceso SRI — decoder / field structure. Factuplan, accessed 2026.

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