Calculate sales tax amounts, tax-inclusive and tax-exclusive prices for any tax rate or jurisdiction.
Type the subtotal amount before tax.
Enter the sales tax percentage for your location.
See the tax amount and final price including tax.
Sales tax math is a single multiplication, but the direction trips people up. The tool runs two ways. Give it a pre-tax price and a rate, and it returns the tax and the grand total. Give it a total that already includes tax, and it divides by one plus the rate to recover the pre-tax price and the tax hidden inside it. The common mistake is applying the rate to an inclusive total, which double-counts tax and overstates it. Rates are often combined state-plus-local figures, and the tool accepts any rate you enter.
A concrete input and expected output from the current implementation.
Input
Price $200.00, rate 7% (tax not included); total $214.00, rate 7% (tax included)
Expected output
From $200.00 at 7%: tax $14.00, total $214.00. From $214.00 at 7%: pre-tax $200.00, tax $14.00.
7% of $200.00 is $14.00, so the total is $214.00. In the other direction, $214.00 already holds the tax, so dividing by 1.07 gives the $200.00 base and the $14.00 inside it. Both directions reconcile to the same numbers.
You enter a price that has no tax in it yet and a percentage rate. Tax equals the price times the rate, and the total equals the price plus that tax. With $200.00 at 7%, the tax is $14.00 and the total is $214.00. The rate is interpreted as a percentage, so 7 means 0.07, and results round to cents.
When a total already contains the tax, the pre-tax price is the total divided by one plus the rate, not the total minus the rate applied to the total. For $214.00 at 7%, that is 214 divided by 1.07, which gives $200.00 with $14.00 of tax inside. This direction is what invoice verification and reimbursement work need.
Because $107.00 already includes the tax. The pre-tax price is 107 divided by 1.07, which is $100.00, so the tax inside is $7.00. Applying 7% to the full $107.00 gives $7.49 and counts the tax a second time. This is the direction most people get backwards.
No. It applies exactly the rate you enter and keeps no jurisdiction tables, because rates change and differ by address. For a current rate, check your state revenue department or the Streamlined Sales Tax Governing Board's rate directory; for VAT, see the European Commission's VAT rates database.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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