Hawaii Sales Tax Calculator
Estimate sales tax in Hawaii at the average combined rate of 4.5%. 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.
Hawaii sales tax rate
| State sales tax rate | 4% |
| Average local sales tax rate | 0.5% |
| Average combined rate | 4.5% |
Population-weighted averages as of July 1, 2025 (Tax Foundation). Your exact rate depends on your city and county.
How sales tax works in Hawaii
Hawaii charges a statewide rate of 4%. Counties and cities add their own rates on top, which is why the combined total varies by location. The 0.5% 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 Hawaii's average combined rate of 4.5% adds $4.50 in sales tax, for a $104.50 total.
Frequently asked questions
What is the sales tax rate in Hawaii?
Hawaii's statewide rate is 4%. With an average local rate of 0.5%, the typical combined rate is about 4.5%.
How much is sales tax on $100 in Hawaii?
At the average combined rate of 4.5%, sales tax on a $100 purchase is about $4.50, for a total of $104.50. Your exact rate depends on your city and county.
Why is my local rate different?
Counties and cities in Hawaii set their own add-on rates, so the total varies by location. 0.5% 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.