Percent discount

Configuration fields

Field	Description	Required	Default
`value`	Percentage to discount (e.g., 20 = 20%)	Yes	N/A
`label`	Display label on invoice	No	N/A
`order`	Execution order when stacking multiple discounts	No	N/A

Validation rules

Rule	Valid	Invalid
`value` between 0 and 100	20	−5, 150

Core calculation

Start from the gross bill amount (after quantity discounts, the pricing model, and commitments), then subtract any fixed discount that runs ahead of it in the stack, per the default order.
Apply the percentage: discount = value% × amount.
Subtract: invoice_amount = amount − discount, floored at $0.

Order of operations (full calculation stack)

Raw usage
Quantity discount: adjusted quantity
Minimum quantity: effective quantity
Pricing model: gross amount
Minimum spend: max(gross, min spend)
Fixed discount: amount minus fixed (floored at $0)
Percent discount: amount × (1 − value%)
Final total

Natural ordering when stacking discount types

Step	Discount type	Reduces
1	Quantity discount	Units
2	Fixed discount	Dollars (flat)
3	Percent discount	Remainder (%)

Multiple percent discounts compound rather than add: 20% + 10% = 1 − (0.8 × 0.9) = 28%, not 30%. The order between multiple percent discounts never changes the result, since compounding is commutative.

Invoice presentation

The discount appears as a line item on the invoice using the configured label. Each period produces a breakdown record tracking: amounts before and after, discount applied, and percentage.

Risks and edge cases

Scenario	Handling
100% discount	Customer pays $0 indefinitely; confirm this is intentional

Glossary

Term	Definition
Percent discount	Percentage deduction from gross bill amount; stateless
Gross amount	Bill total after quantity discount, pricing model, and commitments, and before percent or fixed discounts
Compounding	Two sequential percent discounts multiply: 20% + 10% = 28%, not 30%

Out of scope / deferred

Feature	Description
Cross-product discounts	A shared percent discount across multiple products
Discount validity / expiry	Independent start and end dates on the discount itself

Getting started

Product modules

Security

Model context protocol (MCP)

Pricing models

Third-party integrations

Roadmap

Configuration fields

Validation rules

Core calculation

Order of operations (full calculation stack)

Natural ordering when stacking discount types

Invoice presentation

Risks and edge cases

Glossary

Out of scope / deferred

​Configuration fields

​Validation rules

​Core calculation

​Order of operations (full calculation stack)

​Natural ordering when stacking discount types

​Invoice presentation

​Risks and edge cases

​Glossary

​Out of scope / deferred

Configuration fields

Validation rules

Core calculation

Order of operations (full calculation stack)

Natural ordering when stacking discount types

Invoice presentation

Risks and edge cases

Glossary

Out of scope / deferred