E-invoicing in Poland: Ministry of Finance launches demo version of KSeF 2.0 API

Poland’s Ministry of Finance has launched the pre-production (Demo) environment for the new KSeF 2.0 API, enabling businesses and software providers to test integrations under real authentication conditions. The demo, accessible at ksef-demo.mf.gov.pl, mirrors live system functionality without legal effects, supporting companies in preparing for mandatory e-invoicing rollout

The Ministry of Finance has officially released the pre-production (Demo) environment for the new KSeF 2.0 API, part of Poland’s National e-Invoice System.

This demo version allows financial and accounting software providers to test their systems using real authentication methods, ensuring they are ready for full integration with the mandatory KSeF 2.0 system.

Demo offers:

• Simulates real production conditions for testing
• Uses actual company data and login permissions
• No legal consequences for issuing invoices in this environment
• Data is protected just like in the live system.

The demo is available at ksef-demo.mf.gov.pl.

Companies integrating with the KSeF 2.0 API can get help from the Ministry’s technical team on business days from 7:00 a.m. to 7:00 p.m. via the support form at ksef.podatki.gov.pl/formularz.

This release is a key step toward full implementation of KSeF 2.0, helping businesses prepare for the upcoming e-invoicing requirements.