What is the idaho sales tax calculator?
In short
In Idaho, the state sales-tax rate is 6% (average combined 6.03% with local add-ons). Expect $6.00 of state tax on a $100 item — $106.00 all in. Idaho keeps things simple: the 6% state rate applies almost everywhere, with local tax only in ~30 voter-approved resort cities (up to 3%); none in major cities. Boise itself adds nothing.
Enter a price and this Idaho tool returns the sales tax and total at the 6% state base rate, with a field to swap in your local combined rate. Idaho is unusual in taxing groceries at the full state rate but rebating the cost through a per-person income-tax credit instead of exempting food at checkout.
How to use this calculator
- 1Start with the sticker price — the amount before any tax is added.
- 2Idaho is pre-selected at its 6% state base rate.
- 3Adjust the rate only if a special local district applies — most of Idaho uses the 6% rate.
- 4The tax and total appear instantly below; reverse mode backs the pre-tax price out of a receipt total.
The formula
- pre-tax price
- — Amount charged before tax is applied
- rate
- — Idaho base 6%; combined avg 6.03%
- sales tax
- — Dollar amount of tax added
- total
- — Pre-tax price plus sales tax
Worked example
The scenario
A $500 purchase in Boise, Idaho, where the combined rate is 6%.
The result
At the 6% state base rate the state tax is $30.00 ($530.00 total); at Boise's 6% combined rate you'd pay more once local tax is added.
Common use cases
- Estimating the out-the-door cost of a Idaho purchase before you buy
- Comparing tax on a big-ticket item between Boise (6%) and a lower-rate locality
- Seeing why your receipt differs from the 6% headline — local sales taxes exist only in a small set of voter-approved 'resort cities' — small tourism towns under a population threshold — not in major cities.
- idaho's average combined rate of 6.03% is among the lowest in the nation precisely because almost no localities levy a local tax
Limitations & assumptions
- This tool uses the Idaho state base rate (6%); combined local rates vary — local tax only in ~30 voter-approved resort cities (up to 3%); none in major cities.
- Groceries are taxed at the full 6% rate, but Idaho rebates it through a refundable grocery-tax credit of about $155 per person rather than exempting food at the register.
- Rates change: The grocery-tax credit rose to $155 per person via 2025 legislation (House Bill 231), effective for tax year 2025; the rate itself was unchanged. Confirm with the Idaho State Tax Commission before filing.
- This is a budgeting estimate, not formal tax advice.
Frequently asked questions
What is the sales-tax rate in Idaho?
What is the combined sales-tax rate in Boise, Idaho?
Are groceries taxed in Idaho?
How much is sales tax on a $100 purchase in Idaho?
Has the Idaho sales-tax rate changed recently?
Disclaimer: KalkWise calculators are provided for general informational and educational purposes only and do not constitute financial, investment, tax, or legal advice. Results are estimates based on the figures you enter and the assumptions described above. Actual outcomes will vary. Consult a qualified professional before making financial decisions.