- From February 1, 2026, large VAT taxpayers (over 200 million PLN sales in 2024) must issue invoices via the National e-Invoicing System (KSeF); all others from April 1, 2026.
- Until December 31, 2026, invoices outside KSeF are allowed if monthly sales on such invoices do not exceed 10,000 PLN (VAT included); exceeding this limit triggers mandatory KSeF invoicing from that invoice onward.
- From February 1, 2026, all taxpayers must receive invoices via KSeF.
- The new regulation defines methods for invoice marking, user permissions, authentication, and technical requirements for KSeF.
- KSeF 2.0 will introduce new features, including mandatory logical structure FA(3), the ability to attach files to invoices, and new types of KSeF certificates for authentication and offline invoicing.
Source: ksiegowosc.infor.pl
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.
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