Discount + Tax Combined Calculator
Find the final price after a percentage discount and sales tax, with a full breakdown of savings and tax added.
Result
- Original price$100.00
- Discount (20%)โ $20.00
- Price after discount$80.00
- Sales tax (8% on discounted)+ $6.40
- Effective discount off list20.0%
Step-by-step
- Discount amount = $100.00 ร 20% = $20.00.
- Price after discount = $100.00 โ $20.00 = $80.00.
- Sales tax = $80.00 ร 8% = $6.40.
- Final price = $80.00 + $6.40 = $86.40.
How to use this calculator
- Enter the original (list) price.
- Enter the discount percentage and the sales-tax rate.
- Choose whether tax applies to the discounted price (standard) or the original price.
- Read the final price, your total savings, and the tax added.
About this calculator
This calculator combines two everyday adjustments to a price โ a percentage discount and sales tax โ and shows exactly what you will pay at the register. It first subtracts the discount from the original price, then applies sales tax. In the United States, sales tax is normally charged on the discounted price (the amount you actually pay) when the markdown is a store discount or store coupon, which is the default here; you can switch to taxing the original price for the less common cases. The breakdown separates how much you save from the discount and how much tax is added, and it shows the effective discount as a percentage of the list price so you can compare deals quickly.
How it works โ the formula
Discounted = Price ร (1 โ Discount%)
Tax = TaxBase ร Tax%
Final = Discounted + Tax
(standard US: TaxBase = Discounted)The discount is a fraction of the original price; the remaining amount is the discounted price. Sales tax is then a fraction of the tax base (normally the discounted price) and is added to reach the final total.
Worked examples
- Inputs:
- price=100, discount=20, tax=8, taxOn=discounted
- Output:
- $80 ร 1.08 = $86.40 (save $20)
- Inputs:
- price=50, discount=0, tax=10
- Output:
- $50 ร 1.10 = $55.00
- Inputs:
- price=200, discount=25, tax=7.25
- Output:
- $150 ร 1.0725 = $160.88
Limitations
- Applies a single percentage discount, not stacked or fixed-dollar discounts.
- Tax-on-original is offered but most US percent-off sales tax the discounted price.
- Does not handle tax-exempt items or mixed tax rates within one cart.
Sales-tax base rules vary by state and coupon type; verify locally for exact amounts.