# BR-O-07 Category O document charge must not carry a VAT rate

A document level charge (BG-21) whose VAT category code (BT-102) is "Not subject to VAT" (O) shall not contain a Document level charge VAT rate (BT-103).

## Problem Description

> **ERROR**: EN 16931 VAT category rule

## Context and Significance

Category O amounts are outside the scope of VAT, so a rate on a document level charge is forbidden, even 0. In practice, the error occurs when a pass-through cost is added as a charge with the rate field pre-filled.

## Solution

Delete cbc:Percent (BT-103) from the charge cac:TaxCategory; category O carries no rate.

- [Validate XML](/en/xrechnung-validator?source=resource&rule=BR-O-07)
- [Convert invoice](/en/pdf-to-xrechnung?source=resource&rule=BR-O-07)

## Valid Examples

- Document charge with cac:TaxCategory/cbc:ID = O and no cbc:Percent

## Invalid Examples

- Document charge with cbc:ID = O but cbc:Percent = 0 present (BT-103)

## Code Examples

### Valid XML
```
<cac:AllowanceCharge>
  <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
  <cbc:Amount currencyID="EUR">15.00</cbc:Amount>
  <cac:TaxCategory>
    <cbc:ID>O</cbc:ID>
    <cac:TaxScheme><cbc:ID>VAT</cbc:ID></cac:TaxScheme>
  </cac:TaxCategory>
</cac:AllowanceCharge>
```

### Invalid XML
```
<cac:AllowanceCharge>
  <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
  <cbc:Amount currencyID="EUR">15.00</cbc:Amount>
  <cac:TaxCategory>
    <cbc:ID>O</cbc:ID>
    <cbc:Percent>0</cbc:Percent>
    <cac:TaxScheme><cbc:ID>VAT</cbc:ID></cac:TaxScheme>
  </cac:TaxCategory>
</cac:AllowanceCharge>
```

## Affected Fields

- [BT-102 Document level charge VAT category code](/resources/xrechnung/bt-102-document-level-charge-vat-category-code)
- [BT-103 Document level charge VAT rate](/resources/xrechnung/bt-103-document-level-charge-vat-rate)

## Related Rules

- [BR-O-01](/resources/kosit-validator-errors/br-o-01-not-subject-vat-breakdown-required)
- [BR-O-05](/resources/kosit-validator-errors/br-o-05-line-forbids-vat-rate)
- [BR-O-06](/resources/kosit-validator-errors/br-o-06-allowance-forbids-vat-rate)

## Validation Tools

- [Official KoSIT Validator](https://github.com/itplr-kosit/validator): Run the official KoSIT validator with the XRechnung configuration to check EN 16931 and XRechnung rules.
- [Convert PDF to XRechnung](/pdf-to-xrechnung): Find validation errors during conversion and review each correction.

## Related Resources

- [Official Specification](https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)
- [All validation errors](/resources/kosit-validator-errors): Overview of the EN 16931, XRechnung and Peppol validation rules explained here.