BR-S-05:Standard rate taxable amount calculation
VAT category S taxable amount must equal sum of S-rated amounts.
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: VAT rate (%)
What is BR-S-05?
BR-S-05 is a fatal validation rule defined in the EN 16931 specification. It validates the Percent element under Item > ClassifiedTaxCategory in the UBL invoice XML.
When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.
Target path: //cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory[cbc:ID='S']/cbc:Percent
Why This Error Matters
Invoice will be rejected. Standard rated VAT (category S) requires seller VAT registration, positive VAT rate, and correct tax calculations. Missing elements prevent tax compliance verification.
BR-S-05 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: BR-S-05
- ·Specification: EN 16931
How to Fix It
Sum S-rated amounts
Lines + charges - allowances with category S
Update breakdown
Set TaxableAmount to match sum
Before / After
<Invoice> <cac:InvoiceLine>INVALID_CODE</cac:InvoiceLine> </Invoice>
<Invoice> <cac:InvoiceLine>VALID_CODE</cac:InvoiceLine> </Invoice>
Technical Reference
//cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory[cbc:ID='S']/cbc:PercentCommon Causes
- ·Standard rated line has zero or missing VAT rate
- ·BT-152 must be greater than 0 for category S
- ·cbc:Percent on S category line is 0 or absent
- ·Standard rate requires positive percentage
- ·VAT rate not populated for standard rated item
Seeing this in production? The API handles BR-S-05 automatically. See the fix response →
Frequently Asked Questions
VAT category S taxable amount must equal sum of S-rated amounts.
This requires user input to resolve. Provide the correct value for `cac:InvoiceLine` (BG-25) (BR-S-05). Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, BR-S-05 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
BR-S-05 requires specific business data to resolve. Invoice Navigator detects the error and guides you through providing the needed information, then applies the fix with full audit documentation.
Related Content
Last updated: 3 March 2026
Resolve BR-S-05 with Guided Input
The compliance engine detects this error and prompts for the required business data before applying a safe, auditable fix.