Hungary continues strengthening its digital tax controls with enhancements to KOBAK, the national Online Invoice System used for real‑time VAT reporting. All suppliers issuing invoices in Hungary are required to register with KOBAK, which serves as the central platform for submitting invoice data directly to the Hungarian tax authority, Nemzeti Adó‑ és Vámhivatal (NAV). [docs.sovos.com]
Under the KOBAK system, businesses must transmit invoice data immediately upon issuance. The platform validates each submission and returns one of three responses: acceptance, rejection, or error notification. When an error occurs, taxpayers are required to correct and resubmit the invoice data within three days of the original transmission, ensuring high‑quality data and timely compliance. [docs.sovos.com]
The system’s expanding role supports Hungary’s broader digitalisation strategy, helping minimize the VAT gap and increasing transparency across domestic transactions. KOBAK’s real‑time architecture strengthens audit readiness while reducing administrative burdens associated with post‑period reporting.
With continuous improvements planned for 2026, businesses operating in Hungary are encouraged to review their invoicing processes, ensure system compatibility with KOBAK, and prepare for stricter near real‑time oversight.
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