E-Invoicing Country

Poland

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Live since February 2026

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Mandate Overview

The mandate

Poland's mandatory B2B e-invoicing system, the Krajowy System e-Faktur (KSeF), launched its first phase on February 1, 2026 for approximately 4,200 large taxpayers (turnover above 200M PLN in 2024). All other VAT-registered businesses must onboard by April 1, 2026, and micro taxpayers (monthly invoicing under 10,000 PLN gross) follow on January 1, 2027. A penalty-free grace period runs through year-end 2026.

Timeline

Key milestones

2026
Feb 1, 2026

  • KSeF mandatory for large taxpayers (turnover over 200M PLN)

Apr 1, 2026

  • KSeF mandatory for all other VAT-registered businesses

2027
Jan 1, 2027

  • KSeF mandatory for micro taxpayers

Flowie Coverage

How Flowie supports Poland

Flowie generates and validates KSeF FA(2) XML invoices and submits them through the Polish Ministry of Finance KSeF API. Lifecycle handling, KSeF identifiers, and offline-mode rules are built into the platform.

FAQ

Common questions

When does the mandate apply to my company?

KSeF is mandatory from February 1, 2026 for large taxpayers (over 200M PLN turnover in 2024) and from April 1, 2026 for all other VAT-registered businesses. Micro taxpayers under 10,000 PLN monthly invoicing follow on January 1, 2027.

What format is required?

The Polish FA(2) XML schema, submitted through the central KSeF platform run by the Ministry of Finance. Paper and PDF invoices lose legal validity for in-scope domestic B2B transactions once the mandate hits.

Ready for Poland?

Flowie keeps you compliant, automatically.

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