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E-invoice error explained

BR-DE-18: Cash discount (Skonto) line has the wrong format

XRechnung has a fixed notation for cash discount (Skonto) in the payment terms (BT-20), so the buyer's software can calculate the deduction.

What the rule checks

XRechnung has a fixed notation for cash discount (Skonto) in the payment terms (BT-20), so the buyer's software can calculate the deduction. The rule only checks lines in BT-20 that start with #. Plain text payment terms without # are not affected.

Official rule text

Skonto lines in rsm:CrossIndustryInvoice must match this regular expression: (^|\r?\n)#(SKONTO)#TAGE=([0-9]+#PROZENT=[0-9]+\.[0-9]{2})(#BASISBETRAG=-?[0-9]+\.[0-9]{2})?#$. Information on granting a cash discount (Skonto) must be transmitted in the element "Payment terms" (BT-20) as follows: the first segment is "SKONTO", the second "TAGE=n", the third "PROZENT=n". Percentages are given without a sign and with two decimal places separated by a point. If the amount to be discounted is not BT-115 "Amount due for payment" but only part of the amount due, the base amount for the discount is given as a fourth segment "BASISBETRAG=n" according to the semantic data type Amount. Each entry starts with a #, the segments are separated by a #, and a line ends with a #. A complete Skonto entry must be followed by an XML-conformant line break. All Skonto information must be in capital letters. Additional whitespace (spaces, tabs or line breaks) is not allowed. Characters or text other than those stated above are not allowed.

Source: KoSIT configuration XRechnung 3.0.2 (31 Jan 2026).

Typical causes

  • Lower-case letters, for example #Skonto#Tage=14#.
  • Percentage without two decimals or with a comma: PROZENT=2 or PROZENT=2,00.
  • Spaces inside the line, for example TAGE = 14.
  • The closing # is missing, or no line break follows the last Skonto line.

How to fix it

Put each discount tier on its own line: #SKONTO#TAGE=14#PROZENT=2.00# followed by a line break. If the discount only applies to part of the amount, add BASISBETRAG: #SKONTO#TAGE=14#PROZENT=2.00#BASISBETRAG=1000.00#. Readable text such as "Payable within 30 days net" may stand on separate lines without #. In CII the field is ram:SpecifiedTradePaymentTerms/ram:Description.

Example

Wrong (CII)

<ram:SpecifiedTradePaymentTerms>
  <ram:Description>#Skonto#Tage=14#Prozent=2,0#</ram:Description>
</ram:SpecifiedTradePaymentTerms>

Right (CII)

<ram:SpecifiedTradePaymentTerms>
  <ram:Description>#SKONTO#TAGE=14#PROZENT=2.00#
</ram:Description>
</ram:SpecifiedTradePaymentTerms>

In Dynamics 365, Business Central and Finance

Sales / Project Operations: Sales and Project Operations have no e-invoice output out of the box. In the WBS Invoice Accelerator for Dynamics 365 the payment term is plain text in BT-20, for example "Zahlbar innerhalb 14 Tagen ohne Abzug." The Accelerator writes no Skonto lines, so BR-DE-18 does not come from its output.

Business Central: Cash discount is set up in Payment Terms with Discount % and Discount Date Calculation. If your export turns these into Skonto lines, check their format in the file.

Related error codes

All error codes

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