The National e-Invoice System (KSeF) is a new tax administration tool that will soon become mandatory for most entrepreneurs in Poland. This is an important change that is worth preparing for in advance.
What is KSeF?
KSeF is a system for registering and exchanging structured invoices, i.e., electronic documents in a uniform XML format. It applies to all transactions carried out by entities with their business headquarters in Poland. The system was designed to enable: 1. Sellers – to issue invoices compliant with VAT regulations and clearly marked with the issue date, 2. Buyers – to receive structured invoices securely and automatically, 3. Both transaction parties – access to all invoices issued in the system, 4. Tax authorities – ongoing access to invoice data and the ability to analyze and control them.
When Will KSeF Be Mandatory?
KSeF implementation will occur in two stages:
Stage I – from February 1, 2026
Applies to entrepreneurs whose sales value (including VAT) exceeded PLN 200 million in 2024. Note: Data from 2024 will be decisive – not 2025! It is worth analyzing your turnover now.
Stage II – from April 1, 2026
The obligation to use KSeF will cover all other entrepreneurs, regardless of the scale of business.
What Should You Do Now?
- Check your 2024 revenues – do you exceed PLN 200 million? - Talk to your accountant about how to prepare systems for e-invoice handling. - Follow our blog – we will regularly publish practical information on how to implement KSeF without stress.
Fengo Accounting Office supports its clients in implementing KSeF – from analysis to integration. Contact us: biuro@fengo.pl www.fengo.pl/biuro accounting
