Poland is moving fast on digital invoicing with their B2B eInvoicing mandate going live in April 2026. The Ministry of Finance is rolling out Krajowy System e-Faktur (KSeF) 2.0, the next-generation eInvoicing platform, and recent updates make it clear: businesses that act early will gain a serious advantage.
Here’s what’s happening and why your business should pay attention.
Certification is live: 1 November 2025
On 1 November 2025, the Ministry of Finance released the Certification and Authorization Module (MCU) for KSeF 2.0, letting businesses:
- Register and obtain certificates
- Manage access rights of other users
- Authorise additional certificates on behalf of their business entity.
Early adoption helps businesses streamline IT integrations and gets your business ready for mandatory B2B eInvoicing from April 2026. From 1 February 2026, legal obligations relating to certificate-based issuance and receipt of invoices kick in. The Ministry also cautions that granting MCU access must be done responsibly, as holders of an MCU certificate may legally issue and receive invoices on behalf of the entity. Businesses should ensure to grant access responsibly.
Software testing and integration environment
Since 30 September 2025, KSeF 2.0 has offered an open testing environment for software vendors and taxpayers.
Key features include:
- Fully documented API for seamless system integration
- Technical support from the KSeF 2.0 team
- Comprehensive instruction manuals covering communication protocols, validation rules, and security requirements.
Testing now avoids last-minute headaches. Ensuring your accounting and finance systems work flawlessly with KSeF reduces risk, saves time and avoids compliance issues when the mandate starts.
Pre-production demo version available
A major milestone was reached on 15 November 2025, when the KSeF 2.0 application became available in a pre-production demo version, allowing users with hands-on experience before going live.
You can:
- Issue, receive and review invoices and corrections
- Search and download invoices in XML, HTML, or PDF format
- Manage subsidiaries and VAT group
- Download Official Receipt Certificates for individual or batch invoices
- View session history
- Manage QR codes and invoice access
- Generate and maintain tokens (valid until 31 December 2026)
- Access invoices anonymously
- Access invoices issued offline
- Visualise and download invoices
- Manage user permissions management
- Apply for and download certificates
Why does this matter? The demo environment is risk-free with no real data affected and no certificates or permissions are altered. It’s your chance to train staff, test processes and ensure smooth adoption ahead of April 2026.
Progress and alignment with EU ViDA
KSeF 2.0 is on track, backed by extensive documentation, stable APIs, and active guidance from the Ministry of Finance. This puts Poland ahead in digital VAT compliance and aligns national systems with the upcoming EU VAT in the Digital Age (ViDA) framework targeted for 2030.
Businesses that prepare now not only meet compliance obligations but also gain efficiency, reduce errors and position themselves for future EU-wide digital VAT initiatives.
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Authors
Lisa Dowling
Specialising in International VAT Compliance solutions, Lisa brings a wealth of knowledge and insight in her dealings with a host of international clients ranging from start-ups through to multinationals. With 21 years VAT experience behind her, Lisa has managed VAT compliance issues and solutions globally for over 11 years. Fintua have 12,000 + corporate clients in over 109 countries and many of these are members of the Fortune 500.
