Idaho Sales Tax Calculator
Estimate sales tax in Idaho at the average combined rate of 6.03%. Add tax to a price or back it out of a total.
Enter your combined state + local rate. U.S. sales tax rates vary by city and county.
Idaho sales tax rate
| State sales tax rate | 6% |
| Average local sales tax rate | 0.03% |
| Average combined rate | 6.03% |
Population-weighted averages as of July 1, 2025 (Tax Foundation). Your exact rate depends on your city and county.
How sales tax works in Idaho
Idaho charges a statewide rate of 6%. Counties and cities add their own rates on top, which is why the combined total varies by location. The 0.03% figure above is the population-weighted average. To add tax, multiply the price by the rate; to back it out of a tax-inclusive total, divide by 1 plus the rate.
Worked example
A $100 purchase at Idaho's average combined rate of 6.03% adds $6.03 in sales tax, for a $106.03 total.
Frequently asked questions
What is the sales tax rate in Idaho?
Idaho's statewide rate is 6%. With an average local rate of 0.03%, the typical combined rate is about 6.03%.
How much is sales tax on $100 in Idaho?
At the average combined rate of 6.03%, sales tax on a $100 purchase is about $6.03, for a total of $106.03. Your exact rate depends on your city and county.
Why is my local rate different?
Counties and cities in Idaho set their own add-on rates, so the total varies by location. 0.03% is the population-weighted average; enter your exact combined rate for a precise figure.
Sales tax by state
Or use the general sales tax calculator with any rate.