Discount Calculator

See the real sale price, including stacked discounts and sales tax.

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Enter your numbers

e.g. "an extra 10% off sale prices". Stacked discounts are not added together.

Your results will appear here as you type.

How this is calculated

Sale price = Price × (1 − Discount ÷ 100) × (1 − Extra discount ÷ 100). Tax is applied to the sale price. Two discounts of 20% and 10% equal 28% off, not 30%.

Assumptions

  • Stacked discounts are applied one after another. Sales tax, if entered, is applied to the discounted price.

Estimates for planning and education only. Not financial, tax or legal advice, and not an official government calculation. Calculations run in your browser; nothing you enter is stored or sent.

How stacked discounts really work

“An extra 20% off sale prices” is applied after the first discount, not added to it. A $100 item at 30% off is $70; an extra 20% off $70 is $56. That is 44% off in total, not 50%.

Example

A $120 jacket is 25% off ($90). At checkout you apply a 10% coupon: $90 × 0.90 = $81. With 7% sales tax, you pay $86.67. Your total discount is 32.5%.

Is it really a deal?

  • Compare the final price with what other stores charge, not with the “original” price on the tag.
  • Check the return policy: final-sale items can cost more if they don’t work out.
  • Watch shipping costs and minimums that cancel out a coupon.

More ways to spend less: our money-saving guides.

Frequently asked questions

Is sales tax charged on the original price or the sale price?

In general, sales tax applies to the price you actually pay after store discounts. Manufacturer coupons can be treated differently in some states.

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