Polish Parliament Approves B2B E-Invoicing law starting February 1, 2026

Approval Date and Implementation: On July 30, 2025, the Polish Parliament approved the phased rollout of the National e-Invoice System (KSeF), making e-invoicing mandatory starting February 1, 2026, for large businesses, with full adoption expected by 2027.
Implementation Timeline: The rollout will occur in stages: large businesses (over PLN 200 million in sales) must comply by February 1, 2026; all remaining entrepreneurs by April 1, 2026; and small businesses (monthly sales up to PLN 10,000) by January 1, 2027.
Support Measures for Businesses: The reform includes delayed penalties for invoicing errors and a transition period allowing traditional cash registers until the end of 2026. Additionally, the VAT refund period will be shortened from 60 days to 40 days, enhancing cash flow for businesses during the transition.

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