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BR-27 - Item net price must not be negative

The item net price (BT-146) must not be negative.

BR-27 - Item net price must not be negative

The item net price (BT-146) must not be negative.

Invoice linesEN 16931BT-146 Error

What this rule checks

The item net price (BT-146) must not be negative.

How to fix it

Use a non-negative net price; model reductions as allowances, not a negative price.

Validate against this rule

This rule is part of EN 16931. Check your invoice with the validator that matches your format:

UBL / PeppolXRechnungFactur-X / ZUGFeRD

Related rules

BR-21Each invoice line needs an identifierBR-22Each invoice line needs a quantityBR-23Each invoice line needs a unit of measureBR-24Each invoice line needs a net amountBR-25Each invoice line needs an item nameBR-26Each invoice line needs a net price

Source: CEN EN 16931 Schematron · Last verified: 2026-07-10

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