# BR-DEC-24

> The allowed maximum number of decimals for the Invoice line allowance amount (BT-136) is 2.

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/br-dec-24

## Official rule text

The allowed maximum number of decimals for the Invoice line allowance amount (BT-136) is 2.

## Why did my invoice fail BR-DEC-24?

An Invoice line allowance amount (BT-136), a discount applied within a single invoice line, may carry at most two decimal places. This keeps line-level discounts at currency precision so they subtract cleanly from the line net amount.

## Common causes

- Calculating a percentage discount as a float without rounding (e.g. 5.005)
- Prorating a total discount across lines and emitting the raw quotient
- Passing through more decimals than the currency minor unit allows

## How do I fix it?

```
Round to 2 decimals: <cac:AllowanceCharge><cbc:ChargeIndicator>false</cbc:ChargeIndicator><cbc:Amount currencyID="EUR">5.00</cbc:Amount></cac:AllowanceCharge>
```