How US sales tax works
The US has no national sales tax. States set a base rate (from 0% to 7.25%), and many counties, cities and special districts add their own, so the rate on a purchase depends on where you buy. Shelf prices exclude tax, which is added at the register.
Worked examples
- $100 in California: 7.25% state + about 1.78% average local = $109.03. Local rates in California range up to 5.25%.
- $100 in Texas with a 2% city rate: 6.25% + 2% = $108.25.
- $100 in Oregon: no sales tax, $100.
Finding your exact rate
Your state's department of revenue publishes a rate lookup by address. Leave the local field empty to use the state's average local rate, or type your exact local rate for a precise figure.
Exemptions
Many states exempt or lower the rate on groceries, prescription drugs and sometimes clothing, and some hold tax holidays. This calculator applies the general rate.
How this works
The page adds the state's general sales tax rate to your local rate (or to the state's average local rate if you leave it empty) and multiplies the price by the combined rate. Rates come from the Tax Foundation's midyear 2026 compilation of state rates. The tax and the total are rounded to the cent.
Frequently asked
Which states have no sales tax?
Delaware, Montana, New Hampshire and Oregon have none; Alaska has no state tax but allows local ones.
Which state has the highest sales tax?
California has the highest state rate, 7.25%; Louisiana has the highest average combined rate, about 10.1%.
How do I find my local rate?
Use your state's revenue department lookup by address or ZIP code.
Is sales tax charged on groceries?
Many states exempt groceries or tax them at a lower rate.
Sources
- Tax Foundation — State and Local Sales Tax Rates, Midyear 2026
- Wikipedia — Sales taxes in the United States
Reviewed Oct 17, 2026 · test vectors fixtures/calculators/finance/us/sales-tax-calculator/