E-Invoicing in Hungary
Hungary uses a Real-Time Invoice Reporting (RTIR) model where all invoice data must be reported to NAV before delivery to the customer. The actual invoice format is flexible (paper, PDF, or electronic). Sector-specific e-invoicing mandates apply for energy (Jul 2025) and water utilities (Jan 2026). A full B2B e-invoicing mandate is expected from 2027+ aligned with ViDA.
Mandate Status
| Phase | Status | Scope |
|---|---|---|
| RTIR (all invoices) | Live (Jul 2020) | All VAT-registered businesses — every invoice reported |
| NAV XML 3.0 | Live (May 2025) | Version 3.0 mandatory (2.0 discontinued) |
| B2B e-invoicing (energy) | Live (Jul 2025) | Electricity and gas sectors |
| B2B e-invoicing (water) | Jan 2026 | Water utilities |
| Full B2B mandate | 2027+ | Expected under ViDA |
Technical Specifications
Implementation Notes
RTIR is not e-invoicing. The critical distinction: Hungary mandates real-time reporting of invoice data to NAV, not the exchange of structured e-invoices between parties. Your pipeline must report via the Online Számla API before delivering the invoice to the customer. The actual invoice can still be PDF. NAV XML 3.0 is mandatory from May 2025 — version 2.0 is discontinued.
API integration. Reporting must happen in real-time via HTTPS web service. An Offline24 mode is available for system outages. The API has rate limits and the NAV XML 3.0 schema has strict validation. Fines up to HUF 500,000 (~€1,250) per unreported invoice.
Common Rejection Patterns
| # | Code | Description | |
|---|---|---|---|
| 1 | HU-R-001 | Hungarian tax number required | Fix guide |
| 2 | HU-R-002 | NAV Online Invoice reporting required | Fix guide |
| 3 | HU-R-003 | NAV technical user required | Fix guide |
| 4 | HU-R-004 | Hungarian VAT code required | Fix guide |
Invoice Navigator auto-remediates these at pipeline speed. See how →
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