Key Dates & Changes
- New enforcement start date: postponed from July 1 to September 15, 2025, for stricter validation rules in NAV’s Online Számla system
- Validation tightening: 21 message types previously classified as warnings will be upgraded to errors, causing invoice submissions to be rejected if violated
What’s being enforced
- Examples of reclassified messages include:
- VAT number errors within VAT groups
- Misreported VAT status (e.g., flagging intra-community vs. domestic incorrectly)
- Currency exchange discrepancies
- Errors in correction or cancellation invoices—like invalid sequence or already canceled invoices
- A newly added warning will flag mismatches between buyer VAT status and provided Hungarian VAT numbers
Impact on businesses
- Blocked submissions: From Sept 15, any invoice with one of the 21 error conditions will be rejected.
- Testing period: Use NAV’s sandbox from Sept 1 to ensure everything works smoothly
- Penalties: Errors left unresolved after formal NAV notices may lead to default fines
✅ Recommended Next Steps
- Audit current Online Számla setups and identify recurring warnings.
- Adjust invoicing systems—especially in areas like VAT number formats, currency data, and invoice correction flows.
- Participate in the SANDBOX testing window (Sept 1–15) to pre-empt issues.
- Coordinate with software providers to ensure compliance with the new rules by the deadline.
- Monitor NAV communication for any updates or additional guidance.
TL;DR
Hungary has pushed its planned stricter e‑invoicing validation from July 1 to September 15, 2025, reclassifying 21 warning checks as errors that will stop invoice submissions. Businesses must use the summer lead time to clean up invoice data, test systems, and avoid penalties.
- See also
- Join the Linkedin Group on Global E-Invoicing/E-Reporting/SAF-T Developments, click HERE
