What causes the BR-O-01 error?

VAT category O (out of scope) must not have a VAT percentage.

How do I fix BR-O-01?

Recalculate the value in `cac:InvoiceLine` to match the expected formula. Verify all contributing amounts are correct (BR-O-01). This error involves a protected field — Invoice Navigator flags it in your pipeline so your team can correct it at the source.

Is BR-O-01 a critical error?

Yes, BR-O-01 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.

Can BR-O-01 be automatically fixed?

BR-O-01 involves a financial or legal field that cannot be auto-modified by policy. Invoice Navigator detects and flags this error immediately, but the correction must be made manually in your ERP or invoicing software.

Which accounting software causes BR-O-01?

BR-O-01 is commonly seen in exports from All invoicing software. These software packages sometimes generate invoices that need adjustment to meet full compliance standards.

Error codes · EN 16931

BR-O-01Partly

Out of scope requires single VAT category in breakdown

This is the rejection, word for word: „[BR-O-01] If invoice uses VAT category O, the VAT breakdown must contain exactly one category code equal to O.“

What to have readyThe correct figures from your bookkeeping; we show you which field is affected.

What we doRecalculate the value in `cac:InvoiceLine` to match the expected formula. Verify all contributing amounts are correct (BR-O-01).

Choose the rejected invoiceor drop it here

XRechnung XML or ZUGFeRD PDF. Checking is free · corrected file €1.90 · the first every 30 days is free · no sign-up.

If you enter it yourself in your invoicing software

Before

<Invoice>
  <cac:InvoiceLine>999.99</cac:InvoiceLine>
  <!-- Does not match expected calculation -->
</Invoice>

After

<Invoice>
  <cac:InvoiceLine>100.00</cac:InvoiceLine>
  <!-- Matches expected calculation -->
</Invoice>

What the finding looks likeExample

FindingNeeds your check · BR-O-01

Location//cac:TaxCategory[cbc:ID="O"]/cbc:Percent

From youThe correct figures

ThenChecked again

ProofSHA-256 and /verify link after the check

Often appears together with

BR-E-01Exempt VAT requires VAT breakdown BR-Z-01Zero-rated VAT must be in breakdown