Invoice Software for Hungary

Choosing invoicing software for Hungary primarily means ensuring seamless compliance with the National Tax and Customs Administration (NAV) regulations. A critical feature is real-time electronic reporting compliance with the Hungarian Online Számla system (also known as KOBAK). Your software must automatically transmit sales invoice data to NAV immediately upon issuance, before delivery to the customer, for all B2B, B2G, and B2C transactions, regardless of the VAT amount. This data must be generated in a mandatory XML format, specifically XML schema version 3.0 as of May 15, 2025, which is considered the legally authentic invoice. Furthermore, robust integration with ERP systems is essential, allowing for automated data transmission via a secure web service interface (HTTPS) to the Online Számla system, eliminating manual intervention.

When evaluating invoicing software for Hungary, focus on its ability to meet strict tax authority standards.

1. Customization and Accreditation: The software should offer customization options to align with evolving NAV requirements. All invoicing software must undergo mandatory accreditation, demonstrating its capability to generate compliant invoices and block non-compliant data. Look for solutions that proactively manage these updates.
2. Streamlined Invoicing for B2B and B2C: While real-time data reporting is mandatory for all transaction types, consider how efficiently the software handles both B2B and B2C invoicing processes. Hungary is moving towards mandatory e-invoicing for domestic B2B and cross-border EU transactions, with the XML file serving as the legally binding document.
3. Pricing Models: Evaluate pricing structures, such as subscription-based models versus one-time purchases, to find a solution that aligns with your budget and operational scale. Ensure the chosen model includes ongoing compliance updates.

Non-compliance with Hungary's e-invoicing regulations carries significant risks. The consequences of non-compliance can include administrative penalties of up to HUF 500,000 (approximately €1,252) per unreported or incorrectly reported invoice. For companies, general penalties can reach HUF 1,000,000, with repeated non-compliance potentially incurring fines of up to HUF 1,000,000 per invoice. Beyond monetary penalties, non-compliance may trigger VAT audits and could lead to deduction denials for buyers. Therefore, ensuring your software provides full support for the Online Számla system is paramount. This includes establishing a technical user with specific credentials (username, password, XML key, XML exchange key) within the NAV system and correctly configuring your software to use these for automated, real-time data transmission. Always verify that your software connects to the live NAV system, not a test environment.