Find the sale price after one or two stacked discounts, add sales tax, and see exactly how much you save.
Original: $80.00 · Sale price: $60.00
Good deal
25%A 25% effective discount saves $20.00, bringing the price to $60.00.
Each discount reduces the running price: first discount applied to the original, the second (if any) applied to the result. Sales tax is added after all discounts.
Effective discount = 1 minus (1 minus d1/100) times (1 minus d2/100). For example, 25% then 10% off is not 35% off — it is 32.5% off.
A stacked discount applies a second percentage off the already-discounted price, not the original. 25% then 10% off means you pay 75% then 90% of that — totalling 67.5% of the original price.
Tax is calculated on the sale price in most jurisdictions. Enter your local sales-tax rate and this calculator will show the final amount including tax.
When two discounts are stacked the combined saving is less than their sum. The effective discount is the single equivalent percentage that produces the same saving.
This calculator shows you the sale price after one or two stacked discounts, lets you add optional sales tax, and tells you exactly how much you save. Use it to check a deal at the checkout, compare two promotions, or verify that a "double discount" lives up to its name.
The headline figures are the sale price and the total amount saved. When you enter a second discount, the effective percentage shown is the combined rate — always lower than simply adding the two percentages together, because the second discount bites into an already-reduced price. If you add sales tax, the final figure reflects tax applied after all discounts.
Original price 80, first discount 25%, second discount 10%, sales tax 8%.
After the 25% discount the price drops to 60. The 10% second discount then takes it to 54 — a combined saving of 26 (32.5% effective). With 8% sales tax the final amount you pay is 58.32.
A stacked discount applies a second percentage off to the already-reduced price, not the original. A 25% discount followed by 10% gives a 32.5% combined saving — not 35% — because the second reduction is calculated on the lower base.
Each discount multiplies what is left after the previous one. After a 25% cut you have 75% of the original; a further 10% cut leaves 67.5%, which means 32.5% gone in total. Adding the rates (35%) overstates the saving.
After, which is the standard in most jurisdictions. Tax is calculated on the final discounted price, so discounting first always gives you a lower tax charge than if tax were applied upfront.
Leave the second discount field blank or set it to zero. The calculator works with a single discount too, and the effective percentage will simply equal the one rate you entered.
Yes. Enter the clearance markdown as the first discount and the coupon percentage as the second. The result shows the price you would actually pay at the register, plus any tax you owe.
The sale price is the original price multiplied by each discount factor in turn: sale price = original × (1 − d1 ÷ 100) × (1 − d2 ÷ 100). The amount saved equals original minus sale price. The effective discount percentage is (1 − combined multiplier) × 100, which is always less than d1 + d2 when both are positive. Sales tax is then added to the discounted price: final = sale price × (1 + tax ÷ 100). If only one discount is entered the second factor is 1 and drops out of the calculation.
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