KSeF — the National e-Invoicing System. We're ready. Are you?
KSeF (Krajowy System e-Faktur, the National e-Invoicing System) is a Ministry of Finance system that will ultimately replace traditional paper and PDF invoices. TAX NINJA is ready for this obligation — we have rolled out e-invoice handling as part of our services and guide clients through the entire transition.
The KSeF implementation process
Audit
We review your current invoicing system and integrations.
Configuration
We set up the token, authorizations, and the KSeF integration.
Service
We verify invoices and handle offline mode and corrections.
Using Comarch Optima, Comarch ERP XL, Symfonia, or another ERP system? We have experience with KSeF integrations across various platforms. Get in touch with us.
What is KSeF?
KSeF is a central IT system operated by the Ministry of Finance. Invoices issued in KSeF receive a unique identifying number (KSeF ID) and are stored for 10 years on Ministry of Finance servers. Every B2B invoice issued by a Polish company will have to go through KSeF.
What does TAX NINJA do as part of KSeF support?
- Rolling out e-invoicing in the system you already use
- Setting up the KSeF integration (token, authorizations)
- Handling KSeF offline mode — invoicing when there is no connection
- Verifying the correctness of the XML FA(3) before submission
- Archiving and access to invoices in line with regulations
- Advisory on corrective invoices, duplicates, and notes
When will KSeF become mandatory?
Mandatory KSeF for active VAT taxpayers is planned for 2026 (the deadline may change — we keep up with the latest news). TAX NINJA keeps clients informed of changes as they happen and implements them as part of ongoing service — at no additional charge.
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