# BR-43 Invoice line charge amount is required

Each Invoice line charge (BG-28) shall have an Invoice line charge amount (BT-141).

## Problem Description

Each Invoice line charge (BG-28) shall have an Invoice line charge amount (BT-141).

> **ERROR**: XRechnung 3.0

## Context and Significance

This rule comes from the EN16931 core semantic model enforced by the KoSIT XRechnung 3.0.2 Schematron, ensuring invoices carry the mandatory data needed for automated processing.

## Solution

Add cbc:Amount to the invoice line cac:AllowanceCharge where cbc:ChargeIndicator is true.

- validate
- convert

## Valid Examples

- BT-141 = 1.50 on an invoice line charge

## Invalid Examples

- Line charge with reason but no BT-141 amount

## Code Examples

### Valid XML
```
<cac:InvoiceLine>
  <cac:AllowanceCharge>
    <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
    <cbc:AllowanceChargeReason>Handling</cbc:AllowanceChargeReason>
    <cbc:Amount currencyID="EUR">1.50</cbc:Amount>
  </cac:AllowanceCharge>
</cac:InvoiceLine>
```

### Invalid XML
```
<cac:InvoiceLine>
  <cac:AllowanceCharge>
    <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
    <cbc:AllowanceChargeReason>Handling</cbc:AllowanceChargeReason>
  </cac:AllowanceCharge>
</cac:InvoiceLine>
```

## Affected Fields

- [BT-141 Invoice line charge amount](/resources/xrechnung/bt-141-invoice-line-charge-amount)

## Related Rules

- [BR-44](/resources/kosit-validator-errors/br-44-line-charge-reason-required)
- [BR-41](/resources/kosit-validator-errors/br-41-line-allowance-amount-required)

## 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.