Finance Ministry Launches Pre-Production Demo of KSeF 2.0 Taxpayer Application

Summary

Pre-production environment launched: On 15 November 2025, the Ministry of Finance made the KSeF 2.0 pre-production (Demo) environment available for businesses to simulate real invoicing processes before the mandatory rollout in 2026. [ksef.podatki.gov.pl]
Purpose of the Demo: It allows users to test issuing and receiving invoices using real authentication data (e.g., NIP) but with fictional invoice content, ensuring no tax or legal consequences. [ksef.podatki.gov.pl]
Key functionalities: Users can create, view, and download invoices in XML, HTML, or PDF formats, manage permissions, generate QR codes, and obtain official receipt confirmations (UPO). [ksef.podatki.gov.pl]
Integration readiness: The environment mirrors production conditions, enabling IT teams and software providers to validate API integrations and workflows ahead of the February/April 2026 mandate. [gov.pl]
Mandatory timeline: Large enterprises (turnover > PLN 200M) must use KSeF from 1 February 2026, while all other businesses follow from 1 April 2026; micro-businesses under PLN 10,000 monthly join in January 2027. [ksef.podatki.gov.pl]

KSeF pre-production environment is now available!

KSeF 2.0 Taxpayer Application in Demo Version – A Practical Test Tool for Entrepreneurs

The KSeF 2.0 Taxpayer Application is now available in a pre-production environment, allowing companies to test its functionalities before the mandatory National e-Invoicing System is officially launched.
The demo version enables users to verify authentication processes, manage permissions, and test structured invoices, while actions taken in this environment do not have legal effects.
Deloitte provides comprehensive support for businesses preparing for KSeF implementation, including assistance with electronic seals and technical compliance verification for structured invoices.

The Ministry of Finance launched the pre-production (Demo) environment of the KSeF 2.0 Taxpayer Application on November 15, 2025.
This environment allows users to test features that will be available in the production version from February 1, 2026, using real authentication data but only fictitious invoice data.
Actions in the pre-production environment have no legal or tax consequences, and data is periodically deleted.
The application supports issuing, receiving, and viewing invoices, searching and downloading invoices, QR code handling, session history, permissions management, and more.
Technical support is available, and user feedback will help optimize the final product before its official launch.

Source:

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