Final Sale Price Calculator

A “20% off” tag never tells you what you will actually pay, because the discount comes off first and sales tax is then charged on the reduced price. This calculator works out the true final price with a step-by-step breakdown, and it also runs the other two directions shoppers and sellers need: a markup mode that prices a product for resale, and a reverse mode that recovers the original price from the price you paid.

Quick Answer

How to use the final sale price calculator

Pick one of the three modes at the top of the card, enter its two or three numbers, and click Calculate. Each mode answers a different question, and the results stay hidden until you calculate.

1. Final price mode is the shopping mode. Enter the original price, choose a percent or flat discount, add any extra fees, and enter your sales tax rate. You get the discount amount, the price after discount, the tax amount, any fees, the final sale price, and the amount you save. The worked example ($150, 20% off, 8% tax) is pre-filled.
2. Markup price mode is the seller mode. Enter your cost price and the markup percentage you want. You get the selling price and the profit per unit. Marketplace sellers can sanity-check that selling price against the fees on a listing with the Amazon sale calculator before committing to it.
3. Find original price mode runs the first mode backwards. Enter the pre-tax price you paid and the discount that was applied, and you get the original price plus what the discount saved you. If you know both prices but not the percentage, the discount percent calculator solves for the percentage instead.

Two honest limits. The Final price mode checks that every entry is a number of zero or more, but it does not cap the discount at 100%, so an entry above 100% returns a negative price instead of an error; treat that as a mistyped entry. A flat discount is capped at the ticket price, so a coupon larger than the price zeroes the taxable amount instead of producing a negative total. Fees are added after tax, so they change neither the discount nor the tax amount. The Find original price mode does cap it, because at 100% off there is no original price to recover.

The three formulas, in the order the money moves

Every mode is one short chain of arithmetic. The final price chain applies the discount to the ticket price, then applies tax to what is left, which is the sequence state tax guides use for store discounts.

The reverse formula is the one people get wrong by hand. If you paid $750 after 25% off, you paid 75% of the original, so the original is $750 ÷ 0.75 = $1,000. Adding 25% back onto $750 gives $937.50, which is wrong, because the 25% was taken off the larger original price, not off the $750.

Worked example: a $150 jacket, checked line by line

The pre-filled example is a $150 jacket at 20% off with an 8% sales tax rate. Run it and the calculator returns a $30.00 discount, a $120.00 discounted price, $9.60 of tax, and a $129.60 final sale price.

Five more real runs of the same tool, covering all three modes, are in the table below. Type any row in and you will get the same figures back, to the cent.

Note the formatting quirk in the last markup row: this tool prints plain two-decimal figures with no thousands separators, so a large result shows as $17500.00 rather than $17,500.00. The value is the same; only the grouping differs.

Why the tax is charged after the discount, and when that changes

For a store’s own discount, tax is charged on the price the customer actually pays. The Texas Comptroller’s sales tax guidance works the same example this calculator uses: a $200 shirt discounted by 8.25% sells for $183.50, and the tax is calculated on $183.50, not on $200. That is why a 20% discount saves you slightly more than 20% of the taxed total you would otherwise have paid.

The rate you enter should be your combined state and local rate, since the two stack. The Tax Foundation’s midyear 2026 sales tax table puts the highest average combined rate at 10.13% in Louisiana, while Delaware, Montana, New Hampshire, and Oregon levy no statewide sales tax and Alaska has no state tax although some of its localities charge one. If you are in a no-tax state, enter 0 and the tool returns the discounted price on its own.

One exception is worth knowing before you rely on the order for a business. Manufacturer coupons and mail-in rebates are treated differently from store discounts in a number of states: because the manufacturer reimburses the store, the taxable price may stay at the pre-coupon figure there. This calculator models the standard store-discount sequence. For a coupon-heavy receipt, check your own state’s rule rather than assuming the discounted figure is the taxable one.

Markup is not margin: the seller-side trap

Markup divides profit by cost; margin divides profit by selling price. The same $20 profit on an $80 item is a 25% markup and a 20% margin, and a seller who targets a 25% margin but prices with a 25% markup gives away 5 points on every sale.

Use this page’s markup mode when your pricing rule is stated on cost (“add 40%”), and check the resulting margin before you publish the price. If your target is stated as a margin, work it as a margin from the start; the 20 percent margin calculator shows the same relationship from the margin side on a concrete case.

Stacked discounts: run the tool twice, never add the percentages

Two percentage discounts in a row multiply; they do not add. A store sale of 20% off followed by a 10% coupon takes you to 0.80 × 0.90 = 0.72 of the original price, which is 28% off in total, not 30%.

This tool takes one discount per run, so handle a stack in two passes: run Final price mode with the first discount and a tax rate of 0, note the discounted price, then run it again with that price as the original, the second discount, and your real tax rate. The tax belongs only in the second pass, because it is charged once, on the final discounted price. On a $100 item, that sequence gives $80.00 after the first pass and $72.00 before tax after the second, a $28.00 total saving.

What competing calculators miss

The pages ranking for this term each cover part of the job and stop there:

• Brave Calculator’s final sale price tool handles one flat discount with tax and explains the order well, but there is no markup mode and no way to recover an original price from a sale price.
• Vedantu’s sale price calculator mixes discount, markup, and tax into a single form, which is flexible but blurs which number is which; it also offers no reverse lookup, and its worked table is in rupees with no pre-tax versus post-tax receipt guidance.
• Pearson’s discount calculator is the strongest rival on modes, with $ off, stacked discounts, and a find-the-percent mode, plus step-by-step output. Its gap is the seller side: no markup pricing, and no per-mode breakdown you can copy as a receipt-style record.
• Calculator.net’s percent off calculator explains stacked discounts clearly and solves for any one missing value, but it has no sales tax field at all, so its final price is not the amount that leaves your account.
• The gap this page fills: the checkout question (discount, then tax, itemized), the seller question (cost plus markup, with profit per unit), and the receipt question (what was this before the discount) in one tool, each with its own copyable breakdown, and with the two failure modes (discounts above 100%, adding a percentage back on) called out instead of hidden.

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