KSeF in an online shop:what changes.
Poland's National e-Invoicing System has stopped being a topic for the future. For most sellers the obligation is already running, and for the smallest it begins at the start of 2027.
This text describes deadlines; it is not legal advice. We give only the dates and thresholds from the Ministry of Finance's materials, checked on 4 September 2026, and we do not interpret the law. If you are unsure whether your company falls under one of the thresholds, that is a question for your accountant, not for a shop platform. The source addresses are under the text.
Who, and from when
The duty to issue invoices in KSeF came in stages. From 1 February 2026 it covered the largest taxpayers, those whose 2024 sales including tax exceeded 200 million zł. From 1 April 2026 it covered the remaining companies. Both of those dates are already behind us.
One stage is left. Taxpayers whose monthly sales documented by invoices do not exceed 10,000 zł had the obligation deferred and enter the system on 1 January 2027. A separate point that matters more to many shops: these dates concern issuing. For receiving invoices in KSeF, every taxpayer was meant to be ready as early as 1 February 2026.
What it means for an online shop
For a shop the change is not about whether you issue invoices, but about the road they travel. An invoice for an order stops being a PDF emailed to the customer and becomes a structured document sent into the system. In practice that means three things: the shop has to produce an invoice in the required structure, it has to collect the invoicing details correctly already in the basket, and it has to know what to do with a correction when goods come back. The third one causes the most trouble, because in e-commerce returns are routine rather than exceptional.
How it works with us
In Torveo, KSeF e-invoices are part of the orders module rather than a separate app to buy. You issue VAT invoices and proformas from the panel, the customer gives the invoicing details with the order, and correcting documents are created in the same place as the return. We do not act as an intermediary in your accounts and we do not replace your accountant: we give you a tool that issues the document and sends it where it has to go.
If you run a shop and the invoice-correction-return path is not yet closed, that is exactly the thing to sort out before January. The rest is paperwork your platform should be taking off your hands.