Discount Calculator

Calculate sale price after discount with optional sales tax. Supports stacked percentage discounts.

By Konstantin Iakovlev · Updated April 2026 · Source: BLS

$
Discount Type
%
%

You Save

$20.00

Sale Price

$80.00

Discount Breakdown

Original Price$100.00
First Discount- $20.00
Total Savings$20.00
Effective Discount20.0%
Sale Price$80.00

Use the Discount Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

Figuring out what you'll actually pay after a sale, with sales tax folded in, takes more arithmetic than most price tags suggest. Feed in the original price, one or more discounts, and an optional tax rate to land on the real total. Shoppers, household budgeters, and businesses setting their own prices all benefit from seeing the genuine number. With inflation projected to be around 2.2% in 2026, knowing the true cost of a marked-down item carries more weight than it used to.

Everything starts from the original price. Percentage discounts are applied one after another against the current running price rather than the original figure, which mirrors how stacked deals really behave: 20% off, then an additional 10% off the already-reduced amount. If you've entered a sales tax rate, it's calculated on that final discounted price and added on to produce the total.

Stacking trips people up constantly. It is tempting to read 20% and 10% as a flat 30% off, but that math is wrong and always overstates the savings, since the second cut comes off the lower price, not the sticker. Tax treatment is another regional wrinkle: some places tax before discounts and some after. This tool applies sales tax once every discount has been taken.

Example: Buying a new high-tech gadget in 2026

  1. 1 Imagine you're eyeing a new 'Quantum Leap' smart display, originally priced at $799.99 in mid-2026. The store offers a 15% promotional discount, and you have an additional 5% loyalty coupon. Sales tax in your state is 7.5%.
  2. 2 First, apply the 15% discount: $799.99 * (1 - 0.15) = $679.99. Next, apply the 5% loyalty coupon to this new price: $679.99 * (1 - 0.05) = $645.99. Finally, add the 7.5% sales tax: $645.99 * (1 + 0.075) = $694.44.
  3. 3 The final price you would pay for the 'Quantum Leap' smart display is $694.44.
  4. 4 This example demonstrates how applying discounts sequentially (stacked) and then adding sales tax provides the accurate final cost. This approach helps you budget precisely for your 2026 purchases, especially with the fluctuating prices of tech goods.

Source: BLS · Last updated: April 2026

Frequently Asked Questions

How do I calculate the price after a percentage discount?
Multiply the original price by (1 minus the discount percentage). For a 25% discount on a $80 item: $80 x 0.75 = $60. Or calculate 25% of $80 ($20) and subtract it.
How do stacked discounts work?
Stacked discounts are applied sequentially, not added together. A 20% discount followed by a 10% discount is not 30% off. On a $100 item: 20% off = $80, then 10% off $80 = $72. The total discount is 28%, not 30%.
Is sales tax calculated before or after the discount?
Sales tax is calculated on the discounted (final sale) price, not the original price. If an item is 30% off from $100 to $70, sales tax applies to $70.

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