- In 2026, invoicing software for e-commerce must comply with mandatory KSeF requirements, including FA(3) format, KSeF 2.0 integration, and an issuer certificate from the e-Tax Office.
- A suitable invoicing system must handle high order volumes automatically and integrate smoothly with sales platforms and payment gateways, while being confirmed KSeF-ready.
- Mandatory KSeF rollout starts on 01.02.2026 for receiving invoices by all firms and for issuing e-invoices by the largest businesses; from 01.04.2026 it applies to all other active VAT taxpayers.
- Exceptions include low-value invoices up to 450 PLN under certain turnover limits, and B2C invoices without the buyer’s NIP.
- Businesses must personally obtain and upload the issuer certificate to enable the software to send invoices to KSeF on their behalf.
Source: eurofiscalis.com
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.
