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Stacked Rebate & Coupon Calculator

Enter the price, coupon percentage, and rebate to see your final price.

How it is calculated

The tool applies the two offers in a fixed order: after coupon = price × (1 − coupon % / 100), then final = after coupon − rebate. The price and the rebate are money amounts in dollars, the coupon is a percentage from 0 to 100. If the rebate is larger than the discounted price, the final price is floored at $0.00 rather than going negative. Savings are price − final and the effective discount is savings / price × 100, shown as a percentage of the original price. All three fields are required, so type 0 for a missing rebate or coupon. Taxes and shipping are not included.

Worked example

A monitor is listed at $249.99. You have a 20% coupon and a $30 mail-in rebate. After the coupon: 249.99 × 0.80 = 199.99. After the rebate: 199.99 − 30 = $169.99 (the tool carries the unrounded values, 199.992 − 30 = 169.992). Total savings: 249.99 − 169.99 = $80.00, which is 80 / 249.99 = 32.00% of the list price. Note that the rebate is not reduced by the coupon: it stays a flat $30.

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Common mistakes

  • Adding the percentages and dollars as if they were one discount, such as "20% plus $30 off" subtracted from the price together. The rebate is subtracted after the coupon, not before it.
  • Applying the coupon to the price after the rebate. In this tool the coupon reduces the sticker price first, so a 20% coupon never reduces the flat rebate.
  • Counting the rebate as instant. Mail-in rebates are often paid weeks later, so the cash you pay at checkout is the after-coupon price, not the final price.
  • Leaving the rebate or coupon field empty. Both are required; type 0 for "none", otherwise no result appears.

About this calculator

Retail promotions often stack two discounts in sequence: a percentage-off coupon applied at checkout, followed by a flat mail-in or app-based rebate credited later. Because the rebate is a fixed dollar amount, not a percentage, the order matters — the coupon percentage first reduces the sticker price, and only then is the flat rebate subtracted from that already-discounted total.

This calculator applies both steps in order to reveal your true final price and total savings versus the original price — useful for shoppers comparing a “20% off + $10 mail-in rebate” deal against a simpler flat discount to see which actually saves more.

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Comments (1)

  • Editorial team

    The effective discount is measured against the list price, which makes it handy for comparing two offers on items with different prices: a small flat rebate on a cheap item can beat a larger coupon percentage on a pricey one, or the reverse. For the cash you hand over at the register, run it again with the rebate set to 0. What stacking rules have you met that this fixed order does not cover?

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