`BR-IP-09`

EN 16931 · validation rule

EN 16931Error

In the VAT breakdown with category M (IPSI) the VAT amount (BT-117) must equal taxable amount (BT-116) x rate (BT-119) / 100. Recompute cbc:TaxAmount / ram:CalculatedAmount; summing per-line VAT amounts with their own rounding is a frequent cause of a 0.01 difference.

Field: tax_breakdown[].tax_amount (BT-117)
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-IP-09?lang=en