E-invoicing mandate

E-invoicing in Poland

A sourced summary of the structured e-invoicing program in Poland. It is a starting point, not a compliance certificate or proof of delivery.

At a glance

Scope: Business-to-business
Status: Phasing in
First receiving phase: 2026-02-01
First issuing phase: 2026-02-01
Network or channel: KSeF (national clearance platform)
Format: FA(3) XML (via KSeF 2.0)

What this means for you

KSeF began on 1 February 2026 for businesses whose 2024 gross sales exceeded PLN 200 million and on 1 April 2026 for most others. Sellers at or below PLN 10,000 of in-scope monthly gross invoiced sales remain deferred until 1 January 2027.

What FreeBillGen can verify

For eligible saved invoices, FreeBillGen can prepare generic OASIS UBL and UN/CEFACT CII mappings and run its named internal checks. These mappings are not EN 16931, Factur-X, Peppol, national-CIUS or clearance-platform validation. FreeBillGen does not transmit them through a provider network.

Check this route in Invoice Passport

The free Inbox can manually parse selected UBL/CII supplier files for review. Syntax recognition is not profile validation; manual upload is not a Peppol or government-network receiving endpoint and does not by itself satisfy a receive obligation. Open manual upload

Official sources used

Polish Ministry of Finance - KSeF 2.0 rollout (opens in a new tab) Source reviewed 2026-08-17
Polish Ministry of Finance - issuing and receiving invoices in KSeF (opens in a new tab) Source reviewed 2026-08-17

General information only; not legal, tax, accounting, conformance, or delivery-provider advice. Confirm the current scope, technical profile, and channel with the official source or a qualified adviser.