Sales Tax Calculator

To add sales tax, multiply the price by the tax rate and add the result. A $100 item at 8.25% tax has $8.25 in tax, for a total of $108.25. To remove tax from a total, divide by (1 + rate), so $108.25 / 1.0825 = $100. This tool does both.

Enter the price and the tax rate, then pick a mode. Tax Exclusive adds tax on top of the price you typed. Tax Inclusive treats your number as a total that already includes tax, and splits out the pre-tax price and the tax inside it. Both modes show the total, the tax amount and the price before tax.

The reverse calculation catches many people out. You cannot just take 8.25% off a tax-included total. On $108.25, 8.25% is $8.93, which is too much. The tax is 8.25% of the pre-tax price, not of the total, so dividing is the right method.

In the US, sales tax is set by states, counties and cities, so the total rate depends on where you buy. Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire and Oregon, though some Alaska towns charge a local one. Many other countries use VAT, which is usually already included in shelf prices. Tax Inclusive mode suits those prices. Look up your exact combined rate with your state or local tax agency. For sale prices, apply the discount first with the Discount Calculator. To put tax on a bill for a client, use the Invoice Generator.