# BR-DEC-25

> The allowed maximum number of decimals for the Invoice line allowance base amount (BT-137) is 2.

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/br-dec-25

## Official rule text

The allowed maximum number of decimals for the Invoice line allowance base amount (BT-137) is 2.

## Why did my invoice fail BR-DEC-25?

The Invoice line allowance base amount (BT-137), the amount the line-level allowance percentage is applied to, may have at most two decimal places. Keeping the base at currency precision ensures the allowance amount (base x percentage) reconciles correctly.

## Common causes

- Deriving the base from an unrounded intermediate calculation
- Currency conversion of the base amount producing 3+ decimals
- Emitting full float precision instead of quantizing to 2 places

## How do I fix it?

```
Round the base amount: <cac:AllowanceCharge><cbc:ChargeIndicator>false</cbc:ChargeIndicator><cbc:BaseAmount currencyID="EUR">100.00</cbc:BaseAmount></cac:AllowanceCharge>
```