What you should know about KSeF - a brief guide
The National e-Invoicing System (KSeF) is one of the largest tax digitalization projects in Poland. As early as 2026, most entrepreneurs will be required to send Structured Invoices to the Ministry of Finance's system, and from 2027, the regulations will also cover the smallest taxpayers. Although the change may seem purely technical, it actually impacts work organization in companies, accounting processes, document flow, and owners' responsibilities.