How sales tax by state calculator works
This calculator applies the base sales tax rate for the US state you choose to your pre-tax amount, then adds any optional local rate you supply. Enter the amount, pick a state from the dropdown, and (if you know it) add your city, county, or special-district local rate. The calculator shows the tax amount and the total.
State base rates are curated from public Department of Revenue data. Several states (Oregon, Delaware, Montana, and New Hampshire) have no state sales tax, so their base rate is 0 percent; Alaska also has no statewide sales tax but local areas may levy one, which you can add via the local rate field. The combined rate is the state rate plus the local rate.
Local sales tax rates vary widely by city, county, and special district and change often, so this tool applies the state base automatically and leaves the local portion to you. Always confirm the exact combined rate with your state or local tax authority before relying on a figure. Everything runs in your browser.
Frequently asked questions
Which states have no sales tax?
Oregon, Delaware, Montana, and New Hampshire levy no state sales tax, and Alaska has no statewide sales tax (though local areas may). This calculator returns a 0 percent state rate for those states; add a local rate if your jurisdiction charges one.
How do I add my local sales tax rate?
Enter your city, county, or special-district rate in the Local rate field. The calculator adds it to the state base rate to get your combined rate. Local rates vary by jurisdiction and change often, so check your local tax authority for the exact figure.
Where do the state rates come from?
State base rates are curated from public Department of Revenue data. They reflect the statewide base rate and not local add-ons. Rates can change, so treat the figure as a reference and confirm the current rate with your state tax authority.
How is the sales tax amount calculated?
Tax equals the pre-tax amount times the combined rate divided by 100. The total is the pre-tax amount plus the tax. For example, 100 dollars at a combined 8 percent rate gives 8 dollars of tax and a 108 dollar total.
