# BT-137 — Invoice line allowance base amount

> https://billhorse.com/en/terms/bt-137/

The amount the percentage discount is applied to. When BT-137 and BT-138 are both given, BT-136 must equal BT-137 × BT-138 / 100.

## Where does it live in the XML?

- UBL: `cac:InvoiceLine/cac:AllowanceCharge[cbc:ChargeIndicator=false]/cbc:BaseAmount`
- CII: `ram:SpecifiedTradeAllowanceCharge[ChargeIndicator=false]/ram:BasisAmount`