Poland is introducing legislation to establish the continuous transaction control (CTC) system. The Polish CTC system, called Krajowy System of e-Faktur (KSeF), was made available for all taxpayers in 2022 for voluntary adoption.

To comply with these legal requirements, the following functionality is implemented and available as public preview: Electronic invoicing for Poland.

Generation of XML files for Sales, Project, and Advance electronic invoices in the legally required format provided by KSeF.
Automatic submission of generated electronic invoices to KSeF.
Import of incoming vendor electronic invoices issued and available for recipients on the KSeF platform.

The Polish Ministry of Finance confirms that the KSeF e-invoicing mandate is scheduled as:

February 1, 2026 - for large taxpayers (over PLN 200 million per annum).
April 1, 2026 - for all taxpayers.

In May 2025, the Polish authorities also published the following updated timeline for releasing the KSeF 2.0 technical specifications and testing availability:

June 2025: Publish detailed KSeF 2.0 specifications, including version 3 of the structured invoice schema and new API documentation.
September 30, 2025: Make testing of the new KSeF 2.0 API available.
November 2025: Release a test version of the KSeF 2.0 Taxpayer Application.