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Sales Tax Calculator
Free sales tax calculator. Add sales tax to a price or back it out of a total for any tax rate.
Price vs. Tax
Frequently Asked Questions
How do I calculate sales tax on a purchase?
Multiply the pre-tax price by the tax rate as a decimal, then add it to the price. A $100 item at a 7.25% rate carries $7.25 in tax for a $107.25 total. The calculator does this for any rate and quantity.
How do I figure out the price before tax?
Divide the total by 1 plus the tax rate. A $107.25 total at 7.25% works out to $100 before tax and $7.25 in tax. Switch the calculator to "already includes tax" to run it in reverse.
What sales tax rate should I enter?
Enter the combined rate for the address where the sale happens, which usually stacks state, county, city, and special district rates. Rates change by location and over time, so confirm the current rate with your state revenue department.
Is sales tax charged on the discounted price?
In most states tax applies to the price after a store discount but before a manufacturer coupon reimbursed to the retailer. Rules vary by state, so check your state's guidance when the difference matters.