`BR-Z-06`

EN 16931 · validation rule

EN 16931Error

The VAT rate (BT-96) of a document level allowance with category Z (Zero rated) must be 0 (zero). Category Z means the supply is taxable but at a 0 % rate; if VAT is actually charged, the category must be S with the real rate instead.

Field: allowances[].tax.rate (BT-96)
Rule set: EN 16931
Rule-set version: EN 16931 validation artefacts 1.3.17 · in force since 2026-10-13 · Rule-set changelog
Who has to fix it: The sender

This is a property of the file you received, so it cannot be corrected on your side without changing the document — ask the supplier to reissue it.

Check your own invoice

Drop the file that failed. We parse it, run the official rule sets against it and list every finding with a fix — 20 invoices per day, no key, nothing stored.

Open the live demo

Same explanation over the API: GET /v1/rules/BR-Z-06?lang=en