CALCULATOR · FREE免费 · Free
Invoice Total Calculator
Enter a subtotal, discount and tax rate to get the discounted amount, tax and invoice total. The discount is applied before tax.
--Discount amount · currency
--Tax · currency
--Invoice total · currency
Estimates only; verify on site before ordering or building.
Example
| Item | Value | Unit |
|---|---|---|
| Subtotal | 1000 | currency |
| Discount | 10 | % |
| Tax rate | 8 | % |
| Discount amount | 100 | currency |
| Tax | 72 | currency |
| Invoice total | 972 | currency |
Where people go wrong
- Taxing before the discount, which overstates the tax.
- Entering a fixed discount amount where a percentage is expected.
- Using one tax rate when different line items have different rates.
FAQ
Should the discount apply before or after tax?
Usually the discount comes first and tax applies to the discounted amount; check local rules.
Can I use different tax rates per line?
Yes, but multiply each discounted line by its own rate and add them; this page handles one rate.