Commercial Discount

On the invoice line:

you can mention a the line net price (no indication of commercial discount)
you can include discount information (if customer wants to know the discount details)

Data that can be obtained after creation of the invoice:

Property	Sample Value	Info
DiscountPercentage	25	Discount percentage

Example:

{
 "OrderType": "Invoice",
 "OrderDirection": "Income",
 "OrderNumber": "QS-50001",
 "OrderDate": "2025-09-15",
 "ExpiryDate": "2025-10-30",
  "PaymentDiscountPercentage": 1.50,
  "PaymentReductionDays": 8,
  "Customer": {
   "Name": "Customer Name",
   "VATNumber": "BE0759529999",
   "PartyType": "Customer",
   "Addresses": [
        {
        "AddressType": "InvoiceAddress",
        "Name": "Customer Name",
        "Street": "Oktrooiplein",
        "StreetNumber": "1",
        "City": "Ghent",
        "Zip": "9000",
        "CountryCode": "BE"
        },
   ]
   },
  "OrderLines": [
            {
              "Quantity": 14,
              "UnitPriceExcl": 2.23,
              "Description": "my order line1",
              "ReductionPercentage": 25,  // % commercial discount
              "VATPercentage": 21.0
            }
            ],
}

Below an example how it will be included in the UBL when it is sent via Open/Peppol:

Specific fields in the UBL:

Property	Sample Value	Info
1	ChargeIndicator	false : it is a discount
2	AllowanceChargeReason	fixed text set by Billit : allowance
3	Amount	Total amount of the line discount, calculated by Billit based on ReductionPercentage