# BR-DEC-01

> The allowed maximum number of decimals for the Document level allowance amount (BT-92) is 2.

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/br-dec-01

## Official rule text

The allowed maximum number of decimals for the Document level allowance amount (BT-92) is 2.

## Why did my invoice fail BR-DEC-01?

The Document level allowance amount (BT-92), which is the value of a discount applied to the whole invoice rather than a single line, must be expressed with at most two decimal places. EN 16931 caps monetary amounts at 2 decimals so that totals reconcile exactly and rounding behaves predictably across systems.

## Common causes

- Passing through an unrounded computed discount such as 12.505 or 12.5001 from a percentage calculation
- Using full floating-point precision from an internal ERP field without rounding to currency scale
- Storing amounts in a base unit with 4 decimals and emitting them directly

## How do I fix it?

```
Round to 2 decimals before serializing: <cbc:Amount currencyID="EUR">12.51</cbc:Amount> inside the document-level cac:AllowanceCharge with cbc:ChargeIndicator=false.
```