BR-CO – Conditions and calculations

BR-CO-12: sum of charges (BT-108) does not add up

ErrorEN 16931 business rule (CEN)

Official message

[BR-CO-12]-Sum of charges on document level (BT-108) = Σ Document level charge amount (BT-99).

Source: CEN EN 16931, version 1.3.16

What the message means

In the totals of your invoice stands a sum of charges that differs from the individual charges at document level. The norm requires the sum to equal exactly the addition of all charge amounts, rounded to two decimals; the receiving software recalculates it and rejects the invoice on any difference. Usually a charge was added afterwards, a line charge was counted in, or the VAT on the charge was included in the sum.

Common causes

A charge such as shipping costs was added after the totals were calculated.
Line charges were included in the document level sum.
The sum contains the gross amount of the charge instead of the net amount.

How to fix it

Calculate BT-108 as the sum of all document level charge amounts, net and rounded to two decimals, and enter it in cbc:ChargeTotalAmount. Without charges leave the element out or set 0.

Before – invalid

<cac:AllowanceCharge>
  <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
  <cbc:AllowanceChargeReason>Shipping costs</cbc:AllowanceChargeReason>
  <cbc:Amount currencyID="EUR">12.90</cbc:Amount>
</cac:AllowanceCharge>
<cac:LegalMonetaryTotal>
  <cbc:ChargeTotalAmount currencyID="EUR">15.35</cbc:ChargeTotalAmount>
</cac:LegalMonetaryTotal>

After – corrected

<cac:AllowanceCharge>
  <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
  <cbc:AllowanceChargeReason>Shipping costs</cbc:AllowanceChargeReason>
  <cbc:Amount currencyID="EUR">12.90</cbc:Amount>
</cac:AllowanceCharge>
<cac:LegalMonetaryTotal>
  <cbc:ChargeTotalAmount currencyID="EUR">12.90</cbc:ChargeTotalAmount>
</cac:LegalMonetaryTotal>

Frequently asked

Does the VAT on the shipping costs belong in BT-108?

No. BT-108 is a net sum. The tax on charges flows into the total through the VAT breakdown.

What if a charge was calculated in another currency?

All amounts of the invoice stand in the invoice currency BT-5; convert the charge before entering it, otherwise the sums never match.

Fields concerned

BT-108
BT-99
BG-21
BG-22

Related rules

BR-CO-13
BR-DEC-11
BR-CO-11

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Technical details

UBL · Context (XPath): cac:LegalMonetaryTotal
UBL · Schematron test: xs:decimal(cbc:ChargeTotalAmount) = (round(sum(../cac:AllowanceCharge[cbc:ChargeIndicator=true()]/xs:decimal(cbc:Amount)) * 10 * 10) div 100) or (not(cbc:ChargeTotalAmount) and not(../cac:AllowanceCharge[cbc:ChargeIndicator=true()]))
CII · Context (XPath): //ram:SpecifiedTradeSettlementHeaderMonetarySummation
CII · Schematron test: (not(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeAllowanceCharge[ram:ChargeIndicator/udt:Indicator=true()])and not (ram:ChargeTotalAmount)) or ram:ChargeTotalAmount = (round(sum(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeAllowanceCharge[ram:ChargeIndicator/udt:Indicator=true()]/ram:ActualAmount[1])* 10 * 10 ) div 100)
CII · Context (XPath): //ram:SpecifiedTradeSettlementHeaderMonetarySummation
CII · Schematron test: (not(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeAllowanceCharge[ram:ChargeIndicator/udt:Indicator=true()])and not (ram:ChargeTotalAmount)) or ram:ChargeTotalAmount = (round(sum(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeAllowanceCharge[ram:ChargeIndicator/udt:Indicator=true()]/ram:ActualAmount)* 10 * 10 ) div 100)

Explanation written on 14 September 2026