Discount + Tax Calculator
Apply a discount and tax in one step.
Discount then tax, correctly
Order matters at the register: the discount comes off first, then tax applies to the reduced price. A $100 item at 20% off then 8% tax is $86.40, not $88.
It is useful for pricing at the register or building a quote, where applying a promo code and then sales tax in the wrong order produces a total that is off by a few percent.
Local rules vary
Some regions tax the pre-discount price, so confirm your local rule. The math runs entirely in your browser. The prices you enter are never uploaded.
Frequently asked questions
Is the discount applied before or after tax?
Before. The discount comes off the original price, then tax is charged on the discounted subtotal. $150 with 20% off and 8.75% tax is $120 plus $10.50 tax, or $130.50.
Does the order matter?
For a percentage discount and percentage tax, the final price is the same either way. It matters for coupons in fixed dollars, where most US states tax the price after the store discount.
Why is my receipt a cent different?
Stores round tax per item or per line, while the calculator rounds once at the end. Small rounding gaps are normal.
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