# BR-AE-07 Reverse charge document charge VAT rate must be zero

In a document level charge (BG-21) where the document level charge VAT category code (BT-102) is "Reverse charge" (AE), the document level charge VAT rate (BT-103) shall be 0 (zero).

## Problem Description

In a document level charge (BG-21) where the document level charge VAT category code (BT-102) is "Reverse charge" (AE), the document level charge VAT rate (BT-103) shall be 0 (zero).

> **ERROR**: XRechnung 3.0

## Context and Significance

This is the charge-level counterpart of BR-AE-05 and BR-AE-06, keeping the entire reverse charge category at a zero rate so the buyer accounts for the tax.

## Solution

Set the reverse charge charge cac:TaxCategory/cbc:Percent (BT-103) to 0 to match the zero-rated AE lines and allowances.

- validate
- convert

## Valid Examples

- AE document charge with BT-102 = AE and BT-103 = 0

## Invalid Examples

- AE document charge with BT-102 = AE but BT-103 = 7

## Code Examples

### Valid XML
```
<cac:AllowanceCharge>
  <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
  <cbc:Amount currencyID="EUR">30.00</cbc:Amount>
  <cac:TaxCategory>
    <cbc:ID>AE</cbc:ID>
    <cbc:Percent>0</cbc:Percent>
  </cac:TaxCategory>
</cac:AllowanceCharge>
```

### Invalid XML
```
<cac:AllowanceCharge>
  <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
  <cbc:Amount currencyID="EUR">30.00</cbc:Amount>
  <cac:TaxCategory>
    <cbc:ID>AE</cbc:ID>
    <cbc:Percent>7</cbc:Percent>
  </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-AE-05](/resources/kosit-validator-errors/br-ae-05-reverse-charge-line-rate-zero)
- [BR-AE-06](/resources/kosit-validator-errors/br-ae-06-reverse-charge-allowance-rate-zero)
- [BR-AE-04](/resources/kosit-validator-errors/br-ae-04-reverse-charge-charge-seller-buyer-vat-id)

## Validation Tools

- [Official KoSIT Validator](https://erechnungsvalidator.service-bw.de/): Validate your XRechnung files against all BR-DE rules.
- [Convert PDF to XRechnung](/pdf-to-xrechnung): Automatic validation error fixes when converting.

## Related Resources

- [Official Specification](https://xeinkauf.de/xrechnung/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)
- [Complete Error List](/resources/kosit-validator-errors): Overview of all German XRechnung validation rules.