Poland's National e-Invoicing System (KSeF) is mandatory for large companies from February 2026 and all companies from April 2026. eConnect supports Peppol‑based e-invoicing for organisations with Polish entities or Polish suppliers.
Discuss your Polish KSeF requirements
B2C invoices are excluded. The Offline24 mode allows invoices to be prepared offline and uploaded by the next working day. No penalties are imposed for KSeF errors until end of 2026 (transition period). Companies using KSeF benefit from faster VAT refunds (40 vs 60 days).
Key dates for the Polish e-invoicing obligation:
The national KSeF XML format for domestic B2B invoices submitted to the Polish government platform.
Peppol‑based exchange via the Polish Electronic Invoicing standard (PEF) for cross-border and Peppol‑network transactions.
eConnect connects your ERP or platform to the Peppol network. Discuss KSeF-specific requirements with our specialists.
The Polish KSeF uses two complementary formats:
Organisations with Polish entities face a tight deadline. Speak with an eConnect specialist about your KSeF requirements.
Schedule a meeting
Ask Cora
Ask Cora