About KSeF Narzędzia
Radif Partners is an independent publisher. For KSeF Narzędzia it reads the Polish VAT Act as amended by the Act of 5 August 2025 (Journal of Laws 2025 item 1203), the Finance Minister's regulations (2025 items 1740 and 1815), the FA(3) logical structure and the KSeF 2.0 API documentation, and turns them into tools that run entirely in your browser. It is not a tax authority or a tax adviser and gives no tax advice.
Why this site exists
Since 2026 every business in Poland receives invoices through KSeF, and soon issues them there too. Many people get an XML file from the system that is hard to read, and hear conflicting dates: one in 2025 articles, another in autumn 2026 notices. Many guides also sell invoicing software on the side. This site does something else: in a minute it tells you when KSeF applies to your business, works out the limit and deadlines, and shows the XML invoice as an ordinary document without sending it anywhere.
Who publishes it
The publisher is Radif Partners, a company that builds tools from public rules and data. Radif Partners is not an authority, a tax adviser or an accounting firm. The site is not linked to the Ministry of Finance, the National Revenue Administration or any software vendor and uses none of their logos. It sells no software and carries no affiliate links.
Radif Partners
49 rue du Ressort
63000 Clermont-Ferrand, Francja / France
kontakt@ksefnarzedzia.pl
Where the rules and formats come from
The obligation and deadlines come from the Polish VAT Act as amended by the Act of 5 August 2025, the KSeF regulations and the Ministry of Finance pages. The invoice format is the FA(3) logical structure; codes and numbers follow the KSeF 2.0 API documentation. How we calculate is on the method page; how we fix errors, in the editorial policy.
Your data
The tools process invoices and amounts only in your browser. There is no account, no form that sends your data to us and no storage for your files. Details in the privacy policy.
What the site does not do
It does not log in to KSeF, issue or send invoices, keep books or give tax advice. You can issue invoices free of charge in the Ministry of Finance’s apps or in your own software.
Write to us
kontakt@ksefnarzedzia.pl if you spot a wrong rule, an outdated deadline or a file the reader shows incorrectly.