# BT-147 Item Price Discount

A price-level discount subtracted from the gross item price.

## Quick answer

A price-level discount subtracted from the gross item price.

> **Line items**: The goods or services on each invoice line, including quantities, prices, and VAT.

- validate
- convert

## In plain language

A price-level discount subtracted from the gross item price.

A price-level discount subtracted from the gross item price.

Describes how the invoice line price is derived, including base quantity and any price-level discount, so automated checks can recalculate line totals.

## What you usually enter here

Decimal amount in invoice currency

Typical valid values include: 10.00

Defined by EN 16931 for line price calculation data; required fields must satisfy the listed BR and Peppol calculation constraints.

## What goes wrong often

Avoid values like: -10.00

Relevant rule codes: PEPPOL-EN16931-R044, PEPPOL-EN16931-R046

## Examples in context

Describes how the invoice line price is derived, including base quantity and any price-level discount, so automated checks can recalculate line totals.

Defined by EN 16931 for line price calculation data; required fields must satisfy the listed BR and Peppol calculation constraints.

## Valid Examples

- 10.00

## Invalid Examples

- -10.00

## Related Fields

Describes how the invoice line price is derived, including base quantity and any price-level discount, so automated checks can recalculate line totals.

- [BT-146 Item Net Price](/resources/xrechnung/bt-146-item-net-price)
- [BT-148 Item Gross Price](/resources/xrechnung/bt-148-item-gross-price)

## XML mapping and field facts

Open the technical reference if you need XML paths, validator rule codes, legal wording, or schema-specific mapping details.

### Field ID:
BT-147

### Data Type:
amount

### Cardinality:
0..1

### Requirement:
Optional

### Since Version:
Optional

## XML Implementation

### UBL 2.1 Syntax
```
/Invoice/cac:InvoiceLine/cac:Price/cac:AllowanceCharge/cbc:Amount
```

## Validation Rules

### PEPPOL-EN16931-R044
PEPPOL-EN16931-R044

### PEPPOL-EN16931-R046
PEPPOL-EN16931-R046

## Why the standard cares about this field

### Business Context
Describes how the invoice line price is derived, including base quantity and any price-level discount, so automated checks can recalculate line totals.

### Legal Requirement
Defined by EN 16931 for line price calculation data; required fields must satisfy the listed BR and Peppol calculation constraints.

## Official sources and tools

- [KoSIT Validator](https://erechnungsvalidator.service-bw.de/)
- [Invoice Converter](/pdf-to-xrechnung)
- [XRechnung Standard](https://xeinkauf.de/xrechnung/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)