The timeline for Krajowy System e-Faktur (KSeF) implementation in Poland depends on a company’s gross sales in 2024. Businesses exceeding 200 million PLN in gross sales during 2024 must begin using KSeF for invoicing on February 1, 2026. Other companies will face a later deadline of April 1, 2026, though certain small businesses and cash register users receive an extension until the end of 2026. The gross sales calculation includes domestic, export, and intra-EU supplies, and related preparatory steps include the availability of offline certificate downloads starting November 1, 2025, and KSeF attachment notifications beginning January 1, 2026.
Source: ksiegowosc.infor.pl
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.
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