Poland: KSeF becomes mandatory for the smallest micro-entrepreneurs; penalties start
The smallest Polish sole traders and micro companies; all Polish businesses regarding penalties.
Opmerking bij de datum: Large taxpayers (2024 sales above PLN 200M) started issuing invoices via KSeF on 2026-02-01; from that same date, receiving invoices through KSeF also became mandatory for all registered VAT taxpayers regardless of size. Penalties for KSeF errors are suspended until 2027-01-01.
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Since 1 April 2026 all businesses in Poland must issue B2B invoices through the National e-Invoicing System (KSeF) in the FA(3) XML schema; the system assigns the legal invoice number and the buyer receives it via KSeF. Only micro-entrepreneurs with monthly sales up to PLN 10,000 (gross) have until 2027. Paper and PDF invoices are no longer valid B2B invoices.
Every VAT-registered business in Poland, including foreign companies with a Polish fixed establishment.
Groottes: micro, klein, middelgroot, groot · Sectoren: Alle sectoren · Geldt als: Wij factureren aan andere bedrijven (B2B)
Connect your ERP or invoicing tool to KSeF 2.0 with authentication tokens or a qualified signature, implement the FA(3) schema and offline24 fallback mode, and train staff on retrieving purchase invoices from KSeF. Use the 2026 penalty-free period to fix errors.
Penalties for non-compliance apply from 2027-01-01
Laatst geverifieerd op 8 september 2026. Uitsluitend ter informatie, geen juridisch advies.
The smallest Polish sole traders and micro companies; all Polish businesses regarding penalties.