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

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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 — a percentage discount and sales tax — 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 — the formula

Discounted = Price × (1 − Discount%)
Tax       = TaxBase × 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.

Source: Investopedia — Sales Tax

Worked examples

Example 1

$100, 20% off, 8% tax (on discounted)

Inputs:: price=100, discount=20, tax=8, taxOn=discounted
Output:: $80 × 1.08 = $86.40 (save $20)

Example 2

$50, no discount, 10% tax

Inputs:: price=50, discount=0, tax=10
Output:: $50 × 1.10 = $55.00

Example 3

$200, 25% off, 7.25% tax

Inputs:: price=200, discount=25, tax=7.25
Output:: $150 × 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.

Frequently asked

Is sales tax applied before or after a discount?+

For ordinary store discounts and store coupons in the US, sales tax is charged on the discounted price — the amount you actually pay. Manufacturer coupons are sometimes treated differently (tax on the pre-coupon price), and rules vary by state, so this tool lets you pick the tax base.

How do I calculate a price after discount and tax?+

Multiply the price by (1 − discount%) to get the discounted price, then multiply that by (1 + tax%). For example, $100 with 20% off and 8% tax: $100 × 0.80 = $80, then $80 × 1.08 = $86.40.

What is the "effective discount off list"?+

It is your dollar savings expressed as a percentage of the original list price (savings ÷ original × 100). It equals the discount percentage when tax is excluded, and helps you compare the real value of competing offers.

Does the order of discount and tax change the total?+

When tax is applied to the discounted price, the answer is the same whether you think "discount then tax" or factor it as price × (1−d) × (1+t) — multiplication is commutative. The total only differs if tax is applied to the original price instead.

Can I use this for multiple discounts?+

This tool applies a single percentage discount. For stacked discounts (e.g. 20% then an extra 10%), apply them in sequence: each percentage is taken off the already-reduced price, which is less than simply adding the percentages together.

Why is the final price higher than the discounted price?+

Because sales tax is added after the discount. The discount lowers the price, then tax is calculated on that lower amount and added back, so the final total sits between the discounted price and the original.