US sales tax by state: add tax, take it out of a total, or find the rate
Shipping, discounts and coupons are taxed differently from state to state. These switches let you model the rule in your state; check your state revenue department for the rule. Tax is rounded to the nearest cent (half a cent rounds up).
State rates in force 1 July 2026; checked 18 October 2026.
Only the state base rate is a preset. Cities, counties and special districts add their own rates, and the average shown is population-weighted, not the rate for your address. Most states tax by the buyer's delivery address (destination sourcing); a minority use the seller's location (origin sourcing) for in-state sales, so the right local rate depends on the state. Many states run short sales-tax holidays, and what is exempt (groceries, clothing, medicine, digital goods, services) differs by state; use the exempt switch for items your state does not tax.
This is a calculation aid, not tax advice. Online sellers and businesses should confirm rules with the state revenue department.
This calculator's method was checked against the sources below on .
Works out US sales tax for one or many items using the state base rate (all 50 states and DC) plus an optional local rate, or any rate you enter. It can also take tax out of a total, find the rate from two prices, and model tax-exempt items, shipping, and store discounts versus manufacturer coupons.
tax = taxable price x rate / 100 total = price + tax price = total / (1 + rate/100)
ratecombined state + local sales tax rate in percenttaxable priceprice after store discounts, excluding exempt itemsSales tax = taxable price x combined rate. At 8.25% on a 100 item the tax is 8.25 and the total is 108.25. The combined rate is the state rate plus any city, county and special-district rates at the place the sale is sourced.
Divide the total by (1 + rate). For a 108.25 total at 8.25%: 108.25 / 1.0825 = 100.00. If part of the receipt is exempt or untaxed shipping, mark those lines so only the taxable part is divided.
Delaware, Montana, New Hampshire and Oregon have no statewide sales tax. Alaska has no state tax but many local governments charge their own, up to about 7.85%.
Most states let cities, counties and special districts add their own tax, so two addresses in the same state can have different rates. The calculator only presets the verified state base rate. You can enter your local rate, or use the state average (a population-weighted figure, not your address).
It depends on the kind of discount and the state. A store discount or sale price usually lowers the taxable price. A manufacturer coupon or rebate is often taxed on the full price in many states because the retailer is reimbursed. Choose the kind of discount under Advanced options to compare.
In some states delivery charges are taxable, in others they are exempt, and some depend on whether shipping is separately stated. Use the shipping switch to match your state's rule.
Destination sourcing taxes a sale at the buyer's delivery address, which most states do. A minority of states use the seller's location (origin) for sales made within the state. This matters for the local part of the rate, so check your state revenue department.
A short period, often a weekend in late summer, when a state exempts certain items such as school supplies or clothing under a price cap. The rules and dates are set by each state. During a holiday, mark the exempt items with the tax-exempt box.