In force · PL
E-invoicing in Poland.
B2B live through KSeF: large taxpayers from 1 February 2026, everyone from 1 April 2026.
The calendar
| Date | Who | What becomes mandatory |
|---|---|---|
| 2019-04-18 | Public sector entities | Receiving structured invoices compliant with EN 16931, under the Act of 9 November 2018. |
| 2026-02-01 | Businesses above PLN 200 million annual revenue | B2B invoicing through KSeF. |
| 2026-04-01 | All remaining B2B transactions | B2B invoicing through KSeF. |
Verified on 2026-08-17 against European Commission, eInvoicing in Poland. Mandate calendars move, and several of these have moved once already. If you are reading this well after that date, check the source before acting on it, and tell us if it has changed.
How invoices actually move
KSeF, the Krajowy System e-Faktur, a central national platform. Like Italy and unlike Belgium, invoices pass through the state rather than directly between trading partners.
What the document has to be
EN 16931, with Peppol BIS Billing 3.0 used on the public procurement side and Polish extensions for some sectors such as utilities.
What most summaries get wrong
- This mandate has already slipped once, publicly. It was set for 2024, then 1 July 2024, and an act of 9 May 2024 moved it to 2026. Anything written before mid-2024 about Polish dates is wrong, and that history is the reason to check the source rather than a summary.
- Both 2026 dates have now passed, so the obligation is fully live for every business rather than only the largest.
- The threshold is revenue in zloty, roughly EUR 46 million, and it only ever governed who started in February rather than April.
Where we fit
InvoiceForge builds and checks the document: it generates an EN 16931 invoice, validates one against the rules a real validator reports, and reads one back into structured data. An agent can call it directly.
It does not transmit. Reaching Poland means going through the network above, and that is a separate piece we would rather name than blur. You need both, and knowing which one you are missing is worth more than a page that implies one product does everything.
We are not affiliated with the European Commission, OpenPeppol, or any tax authority. The dates on this page come from the Commission's own country factsheets and, where one exists, the national portal linked above.