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E-Invoice Validator

KoSIT Validator

Check XRechnung against the Schematron published by KoSIT, the German Coordination Office for IT Standards — the same official rules the KoSIT validator applies, running here in your browser.

  • Hosted in the EU
  • GDPR compliant
  • No storage
  • No use of AI
  • No cookies, no tracking
  • Official EN 16931 regulations
  • Always current official regulations

Official rule sets up to date: EN 16931 1.3.17 · Peppol BIS 3.0.20 · XRechnung 3.0.2 (KoSIT 2.6.0). Last checked against the sources on 12.10.2026.

Which version is running here?

XRechnung Schematron 2.6.0, which applies to XRechnung 3.0.2, together with the CEN EN 16931 rules 1.3.17 and Peppol BIS Billing 3.0 3.0.20. The version appears in every result and at /readyz, so a finding stays traceable.

What KoSIT additionally demands

The KoSIT rules (BR-DE) come on top of the EN 16931 rules. They cover the Leitweg-ID as the buyer reference (BT-10), the seller contact group (BG-6), IBAN validation and the payment means.

All 1755 error codes explained

The KoSIT validator is KoSIT's own reference implementation. This service is an independent validator and is not affiliated with KoSIT.