HU

Hungary

NAV 3.x / 4.0

Online Számla

Hungary's real-time invoice reporting XML. NAV 4.0 includes additional operation tags and VAT rate modifiers.

Overview

Online Számla is Hungary's real-time invoice reporting system operated by NAV (Nemzeti Adó- és Vámhivatal — National Tax and Customs Administration). Mandatory since July 2018 (v2.0) and upgraded to v3.0 (2021) / v4.0 (2025), it requires every B2B invoice over HUF 100,000 and all B2C invoices to be reported to NAV in real-time or within 24 hours. The XML schema supports operation tags (CREATE, MODIFY, STORNO) and detailed VAT rate modifiers.

Technical Specification

Standard BodyNAV (National Tax and Customs Administration) — Hungary
Namespace URIhttp://schemas.nav.gov.hu/OSA/3.0
Root ElementInvoiceData
Version4.0 (from January 2025)
Mandatory Sincev2.0: July 2018. v3.0: January 2021. v4.0: January 2025.
SignatureNAV reporting protocol (timestamp + transaction ID) — no embedded XML signature

Fields Extracted by InvoSnap

NAV transaction ID and reporting timestamp
Invoice number (invoiceNumber), issue date, delivery date
Supplier tax number, name, address (supplierInfo/supplierTaxNumber)
Customer tax number, name, address (customerInfo/customerTaxNumber)
Invoice net total, VAT total, gross total, currency (HUF or foreign)
VAT rate breakdown (standard/reduced/exempt)
Line items — name, quantity, unit, net price, VAT rate, amount
Operation type (CREATE / MODIFY / STORNO)
Payment method and due date
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Frequently Asked Questions

What are NAV operation tags (CREATE, MODIFY, STORNO)?

NAV requires every invoice reporting to specify the operation: CREATE for new invoices, MODIFY for corrections, STORNO for cancellations. InvoSnap extracts the operation type.

What is the reporting threshold for NAV Online Számla?

All B2B invoices over HUF 100,000 must be reported within 24 hours. All B2C invoices (any amount) must be reported. InvoSnap reads the exported NAV XML.

Does InvoSnap connect to the NAV API?

No. InvoSnap processes NAV XML files exported from your ERP or billing software. Direct NAV API integration is not supported.

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