Invoicing Software with KSeF in 2026 - How to Choose
How to choose invoicing software with KSeF in 2026: what features matter, how to verify integration, and what not to overlook as a sole proprietor.
Prefer to read with AI?
In 2026, choosing invoicing software is no longer just about PDF aesthetics. With KSeF, what matters most is whether the tool helps you complete the entire process without manual workarounds.
Key questions before comparing tools
- Do I need just invoicing or full accounting (ZUS, tax advance payments)?
- Will the software handle KSeF submission automatically?
- Does it support the test environment for trial runs?
Must-have KSeF features
- Direct KSeF submission -- not just XML export
- UPO retrieval -- automatic confirmation download
- Error handling -- clear messages when KSeF rejects an invoice
- Batch processing -- for months with many invoices
- Test environment -- ability to test before going live
Recommended software for sole proprietors
| Software | KSeF ready | AI features | Starting price |
|---|---|---|---|
| Bookeper AI | Planned | Yes | PLN 0/mo (beta) / PLN 50/mo (planned) |
| iFirma | Yes | No | PLN 59/month |
| inFakt | Yes | No | PLN 29/month |
| wFirma | Yes | No | PLN 49/month |
Bookeper AI is currently free during beta. The planned entry price after beta is PLN 50/month while the KSeF rollout is still marked as planned.
Useful calculators
Related articles
Automatyzuj swoją księgowość
Bookeper AI automatycznie oblicza ZUS, generuje deklaracje i przypomina o terminach. Oszczędź czas i unikaj błędów.
Wypróbuj za darmoZastrzeżenie: This article is for informational purposes only and does not constitute tax or legal advice. If in doubt, consult a tax advisor or accountant. Tax regulations may change.