Which format does Hungary use for e-invoicing?

NAV Online Számla 3.0. Documents go to NAV.

Does Oltrano control the invoice number in Hungary?

Yes. Numbering is gap-free and sequential, resets on your schedule and never reuses a number.

Is Hungary a clearance country?

No. Hungary uses a post-audit regime: you issue the invoice, then report it.

What is the Peppol EAS code for Hungary?

9910. It identifies the electronic address scheme used for parties in Hungary.

E-invoicing in HungaryNAV Online Számla 3.0

Invoice data is reported to NAV; the invoice itself stays yours to issue.

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The facts

What issuing in Hungary actually involves

Format	NAV Online Számla 3.0
Goes to	NAV
Regime	Post-audit — you issue, then report
Invoice number	Stays ours: gap-free, sequential, yours to control
Seller tax ID	VAT number
Buyer tax ID	VAT number
Peppol EAS code	9910
Integration	Billingo

The part that costs a day

The catch nobody writes down

Reporting is about the data, not the document: you keep your own numbering and your own PDF, and what travels is the XML. People expect a portal to hand them an invoice and it never does.

Your numbering stays yours

We issue gap-free, sequential numbers that reset on your schedule and are never reused — including for voided documents, which keep theirs. The authority takes the document as numbered.

Tax is computed from the base

Never extracted from the gross. The two formulas differ by a cent and the wrong one gets the file rejected. The leftover cent is declared as payment rounding (BT-114), where the standard puts it.

Straight talk

What we do not do in Hungary.

We do not hold your signing certificate, we do not file your periodic returns, and we are not your accountant.

No third-party provider is required: we build and validate the document ourselves, and you can still connect one if your accountant prefers it.