PEPPOL-EN16931-R055
Invoice total VAT amount and Invoice total VAT amount in accounting currency MUST have the same operational sign
What does this rule mean?
The total VAT amount (BT-110) and the VAT in accounting currency (BT-111) have different signs.
Both describe the same tax in two currencies — they may differ in magnitude, never in sign.
Official rule message (standard)
Invoice total VAT amount and Invoice total VAT amount in accounting currency MUST have the same operational sign
Where the rule applies
Syntax: CII · UBL
The same rule, expressed twice: UBL and CII name the same fields with different paths. Running a CII file against the UBL rules is why you get errors that mean nothing.
UBL
ubl-creditnote:CreditNote | ubl-invoice:Invoice
CII
ram:ApplicableHeaderTradeSettlement
Technical test
The rule passes when this Schematron expression holds true:
not(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:TaxCurrencyCode) or (ram:SpecifiedTradeSettlementHeaderMonetarySummation/ram:TaxTotalAmount[@currencyID = $taxCurrencyCode] < 0 and ram:SpecifiedTradeSettlementHeaderMonetarySummation/ram:TaxTotalAmount[@currencyID = $documentCurrencyCode] < 0) or (ram:SpecifiedTradeSettlementHeaderMonetarySummation/ram:TaxTotalAmount[@currencyID = $taxCurrencyCode] >= 0 and ram:SpecifiedTradeSettlementHeaderMonetarySummation/ram:TaxTotalAmount[@currencyID = $documentCurrencyCode] >= 0)How to fix it
A missing or incorrect business entry only you can supply. Add or correct it, then re-check.
Correct the sign of the diverging amount.
Correct the affected entry in your XML, then re-check the invoice. Validation runs locally in your browser — your file never leaves your machine.
Check an e-invoice here
Drop an XML or ZUGFeRD PDF file here. Validation runs locally in your browser against EN 16931 — your file never leaves your machine.