Mandatory Feb 2026EuropePoland KSeF eInvoicing: National eInvoice System Guide
Poland's KSeF platform makes eInvoicing mandatory for all businesses from February 2026.
Overview
Poland's Krajowy System e-Faktur (KSeF) is the national platform for issuing, receiving, and storing structured electronic invoices. After a delay from the original July 2024 date, the mandate becomes effective in February 2026.
Key Requirements
All invoices must be issued through the KSeF platform in structured XML format
Invoices receive a unique KSeF identification number upon acceptance
Real-time validation by the tax authority before delivery
B2C invoices are exempt but can optionally use KSeF
Integration via API or authorized billing software required
Timeline
KSeF launched as voluntary system
Mandatory for all VAT-registered businesses
Non-Compliance Penalties
Fines of up to 100% of the VAT amount on invoices not issued through KSeF
Administrative penalties for repeated non-compliance
Invoices outside KSeF may not be recognized for VAT deduction
How Taxera Helps with Poland Compliance
Taxera provides direct KSeF API integration with automated XML generation and real-time submission from SAP.
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