InvoiceValidator.eu

E-invoicing in Iceland

Public sector only

Mandatory for B2G since 1 January 2020 — and a PDF does not count.

Timeline

1 Jan 2020B2G e-invoicing mandatory for all central and sub-central authorities
B2B and B2C remain voluntary, on the same Peppol infrastructure

What you have to send

Format: Peppol BIS Billing 3.0 with the Icelandic CIUS ÍST TS 236
Transmission: Peppol

Iceland implemented EU Directive 2014/55/EU in full: since 1 January 2020 every invoice to the public sector must be a structured e-invoice, and a PDF is explicitly not accepted — which is the mistake that actually gets suppliers rejected, because emailing a PDF feels electronic. The national CIUS is ÍST TS 236, a narrowing of Peppol BIS Billing 3.0 rather than a separate format, so a valid Peppol invoice is most of the way there. This validator checks the 10 Icelandic IS-R rules automatically when the seller is Icelandic — you do not need to select anything. B2B and B2C are voluntary and run on the same Peppol network.

Check an invoice against it

Validate a Iceland invoice against the profile that applies here — Peppol BIS Billing 3.0 (+ national rules).

See a worked example → · Upload your own →

The Peppol profile also applies this country's own rules, and they are switched on automatically from the seller's country — no extra parameter. See the 10 Iceland rules this validator checks →

Verified 2026-08-31. Deadlines move. Always confirm with the national tax authority before you rely on a date.

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