Connect your POS and ERP systems to Poland’s national e-invoicing system (KSeF) via a secure, unified API.
efsta’s KSeF solution automates invoice creation, validation, transmission, and monitoring - both online and offline - so you can comply with Polish KSeF requirements with minimal effort and risk.
Poland is introducing KSeF obligations in phases. The dates that matter:
From February 1, 2026: Mandatory issuance of invoices in KSeF for taxable businesses whose turnover in 2024, including VAT, exceeded 200 million Polish złoty (PLN).
From April 1, 2026: Mandatory issuance of invoices in KSeF for all other taxable businesses, subject to certain exceptions.
From 1 February 2026, receiving B2B invoices via KSeF is mandatory for all taxpayers, regardless of when they must start issuing them.
Taxable companies that are required to use KSeF may continue to issue paper or electronic invoices outside of KSeF if the total monthly value of the invoices, including VAT, does not exceed 10,000 PLN.
If this limit is exceeded in a given month, all subsequent invoices for that month must be issued via KSeF.
Some invoices are not subject to the KSeF requirement, including:
efsta provides a compliant KSeF integration that connects your POS, ERP and back‑office systems to the Polish KSeF platform via efsta’s proven fiscal and e‑invoicing infrastructure.
With efsta, you do not need to connect each cash register or system directly to KSeF. Instead, efsta E-Invoicing solution for KSeF handles the full KSeF process for you.
Result:
You get end-to-end KSeF processing without having to develop or maintain a complex integration yourself.
