Accounting
KSeF 2026 — mandatory e-invoicing: who and from when?
KSeF, the National e-Invoicing System, changes how invoicing works in Poland — invoices are issued and received through a central system of the tax administration. We explain who is covered, from when, and how to prepare without chaos.
What KSeF is
KSeF is a central system that processes structured invoices (XML). Instead of paper or PDF you issue the invoice in the system; it receives a unique KSeF number and is automatically available to your counterparty. Issue and receipt dates follow from the system, which standardises settlements.
Who is covered and from when
The obligation enters in stages — the largest taxpayers first, the rest later. The timeline has shifted before, so the key step is to confirm the date applicable to your company in advance.
- Active VAT payers — as a rule covered according to sales volume.
- Smaller and VAT-exempt taxpayers — at a later stage / under special rules.
- Check the current timeline — we will confirm the date for your company.
How to prepare
- Check whether your accounting/ERP system supports sending and receiving KSeF invoices.
- Grant and organise permissions for issuing invoices in KSeF.
- Define the invoice workflow (who issues, who approves, how you archive KSeF numbers).
- Test issuing and receiving in the test environment before the obligation starts.
- Train the team — most problems come from missing procedures, not technology.
In short: we will confirm from when KSeF covers your company and help implement the e-invoicing workflow — from permissions to system integration.
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