What Is a Structured Invoice in KSeF?
A structured invoice (e-invoice) is an electronic document issued using KSeF – Poland’s National e-Invoicing System, to which the system assigns a unique identification number (the KSeF number). From a technical perspective, an e-invoice is an XML file created in accordance with a strictly defined logical structure. As of 1 February 2026, this structure is in force in the FA(3) version, which applies to enterprises operating in Poland and subject to Polish VAT regulations. In this article, you will learn how e-invoices are issued in KSeF 2.0 and how the VAT document flow operates between the invoice issuer and the buyer within the Polish e-invoicing framework.
KSeF: What Is the National e-Invoicing System Introduced by the Polish Ministry of Finance?
This year, the National e-Invoicing System (KSeF) will become mandatory for the majority of businesses operating in Poland. This change will significantly impact financial and accounting processes, document circulation, and taxpayers’ responsibilities. Companies doing business in Poland should therefore prepare in advance for the upcoming regulatory and operational changes.In this article, we address the most common questions about KSeF in Poland.
PIP on the offensive: How to Protect Your Company from Reclassification of Contracts?
360 new inspectors, 55,000 inspections, 200 targeted audits — the inspection schedule of the National Labour Inspectorate (Państwowa Inspekcja Pracy, PIP) for 2026 is already overflowing. For businesses operating under Polish law, this scale of activity signals a new reality: significantly more intensive and uncompromising verification of B2B contracts and civil-law mandates. All of this stems from the revolutionary changes planned in the draft amendment to the PIP Act.
How to Choose the Right Form of Taxation and Protect Your Profits
Business owners know well how much conscious financial decisions matter for a company’s growth. Success can depend not only on a well-negotiated contract or the choice of a strong business partner, but also — perhaps most importantly — on selecting the right form of taxation. The topic may not sound exciting, but in practice it can be a turning point on the path to higher profits, improved liquidity, and reduced unnecessary expenses.
Tax Explanations of the Minister of Finance from 3 July 2025: Withholding Tax (WHT) and Holding Companies – What Is Changing
After many years, Polish entrepreneurs have finally received official tax explanations from the Ministry of Finance regarding withholding tax – more specifically, the so-called beneficial owner concept, i.e., the real owner for withholding tax purposes. The explanations were published on 3 July 2025.