Discount Amount
$20.00
Discount and Tax Calculator
Calculate final price after applying a discount and sales tax.
Final Price
$66.00
Price After Discount
$60.00
Tax Amount
$6.00
How to use the Discount and Tax Calculator
The Discount and Tax Calculator is free and runs entirely in your browser — no sign-up, and nothing you enter leaves your device. It opens pre-filled with a realistic example, so you can see how it works before replacing any figure with your own; the results update as you type. Press Calculate to refresh the result panel, or Reset to return to the example.
The inputs it asks for:
- Original Price — a dollar amount.
- Discount % — a percentage (enter 6 for 6%).
- Sales Tax % — a percentage (enter 6 for 6%).
The formula
It applies the discount first, then charges sales tax on the reduced price — the order a register rings up a sale:
Final = Price × (1 − discount%) × (1 + tax%)- discount%
- the markdown off the original price
- tax%
- the sales-tax rate applied after the discount
Order matters. Tax is charged on the discounted price, not the original — so a coupon lowers the tax too. (A few jurisdictions and certain coupon types tax the pre-discount price; this uses the common case.)
Worked example
Using the example values — Original Price $80.00, Discount % 25%, Sales Tax % 10% — the Discount and Tax Calculator returns a Final Price of $66.00. It also reports Discount Amount ($20.00), Price After Discount ($60.00), Tax Amount ($6.00).
Prefer your own numbers? Change any field above and this recomputes instantly.
Key terms
- Discount
- An amount or percentage off the original price.
- Sales tax
- A percentage added at purchase, here applied to the after-discount price.
- List price
- The original price before any markdown.
Frequently asked questions
Is tax applied before or after the discount?
After, in the usual case — you're taxed on what you actually pay. This calculator discounts first, then taxes.
Does a coupon reduce the tax too?
Usually yes, because the tax is on the lower price. Some manufacturer coupons and jurisdictions are exceptions and tax the original price.
Can I stack multiple discounts?
This handles a single percentage. For stacked discounts, apply them one at a time — the second comes off the already-reduced price.