The dates
| When | Who | What changes |
|---|---|---|
| 1 February 2026 | Taxpayers whose 2024 sales, VAT included, exceeded PLN 200 million | Must issue their invoices through KSeF.1 |
| 1 February 2026 | All taxpayers | Receive their invoices through KSeF.2 |
| 1 April 2026 | All other taxpayers | Must issue their invoices through KSeF.1 |
| Until 31 December 2026 | Taxpayers whose invoices total up to PLN 10,000 a month, VAT included | May still issue those invoices outside KSeF, as may cash registers.1 2 |
| 1 January 2027 | All taxpayers | Penalties for KSeF errors apply, and the smallest taxpayers issue through KSeF too.2 |
What it means for your cash
KSeF changes how invoices travel, not when customers pay. Payment terms and late payment stay as they are.
An invoice that arrives as a structured file is faster to check, and checking is what a funder needs before it pays an invoice early.
What Advanta reads today
Companies based in Poland cannot sign up to Advanta yet: it works in euro, for sellers in the euro area. A Polish company can already be the customer on an invoice that a seller in the euro area brings to Advanta. Advanta reads KSeF invoices, ready for when Poland opens.
Sources
- Ministry of Finance, KSeF: “Podstawy prawne oraz kluczowe terminy”
- Ministry of Finance, KSeF: “Najczęściej zadawane pytania o KSeF 2.0”
- Act of 5 August 2025 amending the VAT Act (Dz. U. 2025 poz. 1203)
Official sources, read on 26 September 2026.
Get your invoices paid sooner
Request access, then connect your software or upload your e-invoices. The team replies within one business day.