E-invoicing in Austria: A Complete Guide for Businesses

What is Austria e-invoicing?

Austria mandates structured electronic invoicing for suppliers to the federal government, under the IKT-Konsolidierungsgesetz and E-Rechnungsverordnung. The B2G obligation for federal suppliers has been in place since 2014, making Austria one of the EU's earliest adopters of mandatory e-invoicing.

Austrian public sector e-invoicing is supported via two channels: the national ebInterface XML format (Austria's proprietary standard, predating EN 16931) and the Peppol network using Peppol BIS Billing 3.0. Since the EU mandate for cross-border public procurement came into force, Peppol has become the preferred channel for most federal and regional public entities.

For B2B, there is currently no mandate. Austria follows a voluntary approach for commercial transactions, though Peppol adoption among Austrian businesses is growing, particularly among companies that also supply the public sector.

The Peppol BIS Billing 3.0 / ebInterface format

Austria supports two formats for B2G:

Peppol BIS Billing 3.0:

• Standard EN 16931 CIUS as implemented by OpenPeppol
• UBL 2.1 or CII syntax
• Delivered via Peppol AS4 transport
• Participant identifier scheme: 9915 (Austrian VAT number, format ATU12345678, 9 characters after country code)

ebInterface (Austrian-specific):

• Proprietary XML format developed by WKO (Austrian Federal Economic Chamber)
• Current version: ebInterface 4.3 / 5.0
• Submission via the federal portal (USP — Unternehmensserviceportal) or direct API
• Supports Austrian-specific fields (e.g. OrderingPartyOrderID for purchase order reference)

For new integrations, Peppol BIS Billing 3.0 is recommended — it covers both Austrian B2G and cross-border EU requirements with a single format.

Who does it apply to?

Austria has signalled no near-term B2B mandate, though EU-level developments (e.g. the ViDA — VAT in the Digital Age — directive) may change this in the 2027–2030 timeframe.

Timeline / key dates

• 2014: Federal B2G e-invoicing mandate via USP portal (ebInterface)
• 2016–2019: State and municipal B2G mandates phased in
• 2019: Peppol accepted alongside ebInterface for EU cross-border B2G
• No confirmed date: B2B mandate not currently planned

How Clearvo handles Austria e-invoicing

Clearvo supports both Peppol BIS Billing 3.0 delivery and ebInterface XML generation for Austrian recipients.

Key points:

• For Peppol delivery, Austrian recipients are identified using scheme 9915 (AT VAT number without the AT prefix, e.g. 9915:U12345678)
• For USP portal submission (ebInterface), Clearvo generates compliant ebInterface 4.3 XML and handles USP authentication
• Clearvo automatically selects the appropriate format and channel based on whether the recipient is registered on Peppol or requires USP submission
• Purchase order reference (OrderID) is passed via the orderReference field and mapped to the correct element in both formats

What you send: standard invoice fields plus customer.peppolId or customer.vatNumber (AT format), and buyerCountry: "AT".

What you get back: delivery receipt and the generated XML (BIS 3.0 UBL or ebInterface, depending on channel used).

{
  "invoiceNumber": "INV-2026-00055",
  "issueDate": "2026-03-01",
  "dueDate": "2026-03-31",
  "currency": "EUR",
  "supplier": {
    "name": "Acme Software GmbH",
    "vatNumber": "ATU12345678",
    "peppolId": "9915:U12345678",
    "address": {
      "street": "Mariahilfer Straße 100",
      "city": "Wien",
      "postalCode": "1070",
      "country": "AT"
    }
  },
  "customer": {
    "name": "Bundesministerium für Finanzen",
    "vatNumber": "ATU37671700",
    "peppolId": "9915:U37671700",
    "address": {
      "street": "Johannesgasse 5",
      "city": "Wien",
      "postalCode": "1010",
      "country": "AT"
    }
  },
  "orderReference": "BESTELLUNG-2026-0042",
  "lines": [
    {
      "description": "IT consulting services — March 2026",
      "quantity": 15,
      "unitPrice": 1200.00,
      "taxRate": 20,
      "taxCategory": "S"
    }
  ],
  "paymentTerms": "30 Tage netto",
  "bankAccount": {
    "iban": "AT483200000012345864",
    "bic": "RLNWATWWXXX"
  }
}

Getting started

Peppol delivery for Austrian B2G, ebInterface format generation, and USP portal submission are documented at clearvo.io/docs. Use the environment: "sandbox" parameter to test against the Austrian USP pre-production environment.

Related country guides

• Germany — XRechnung 3.0, B2B mandate from 2027
• Switzerland — Peppol BIS 3.0, SIX/MWST voluntary
• Slovakia — Peppol BIS 3.0, B2B mandate roadmap