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 1 February 2026
Mandatory issuing of invoices in KSeF for taxpayers whose 2024 turnover (incl. VAT) exceeded 200 million PLN.
From 1 April 2026
Mandatory issuing in KSeF for all other taxpayers, subject to specific exclusions.
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 offers 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 don’t have to connect every cash register or system directly to KSeF. Instead, efsta’s e-invoicing solution handles the entire KSeF process for you.
Result:
You get end-to-end KSeF processing without having to develop or maintain a complex integration yourself.
