How do I use the Idaho sales tax calculator?

Enter the ZIP code where the buyer receives the order, or start typing the address and pick a suggestion, then enter the price. The calculator shows the combined rate for that ZIP and its state, county, city and district parts, the sales tax on the price, and the total.

Why do Idaho ZIP codes have different rates?

On top of the 6% state rate, counties, cities and special districts charge their own sales taxes, so combined rates run from 6% to 9% depending on location. A ZIP code can also cross a city or district line, so treat the result as an estimate for the ZIP and confirm the rate for the exact address.

How is Idaho sales tax calculated on a price?

Multiply the price by the combined rate for the location and round the tax to the nearest cent. At the 6% state rate alone, a $100.00 sale carries $6.00 in tax; local taxes add to that where they apply.

Does the calculator include every tax that applies in Idaho?

It uses the general sales tax rate for the ZIP code. It doesn’t account for products taxed at a different rate or exempt, or for exemptions that depend on the buyer. The Idaho sales tax guide covers what’s taxable and when you have to collect.

Can I work backward from a total that already includes tax?

Yes. The reverse sales tax calculator takes a tax-inclusive total and a ZIP code and splits the total into the price before tax and the sales tax.

Rates as of September 2026

Idaho Sales Tax Calculator

Idaho’s state sales tax rate is 6%. Local taxes add 0%–3%, for combined rates of 6%–9%.

Results

Enter an Idaho ZIP code to see its combined state, county, city and district rate.

Calculate tax on a sale

Sale amount

Look up a rate, then enter an amount to see the tax and total.

This is an estimate based on location alone. The tax you owe also depends on what you sell, who you sell to and the exact delivery address. If you intend to rely on these rates, use the Kintsugi platform (opens in a new tab).

How the Idaho calculator works

Enter a ZIP code and the calculator adds up the state, county, city and district rates for it, multiplies your amount by the total and rounds the tax to the nearest cent. For the formula and worked examples, see how to calculate sales tax. Rates are as of September 2026.

Read the Idaho sales tax guide for what’s taxable, when you have to register and how to file. For other states, use the US sales tax calculator, and to split a tax-inclusive total, the reverse sales tax calculator.

Idaho sales tax rates at a glance

ZIP codes in the rate data: 316
Lowest combined rate: 6%, in Pocatello (Bannock County)
Highest combined rate: 9%, in Sun Valley (Blaine County)
Most common combined rate: 6%, in 94% of ZIP codes
Counties with their own sales tax: 0

Sales tax rates in major Idaho cities

The 10 cities with the most ZIP codes in the rate data, with the parts that make up each combined rate.

City	Combined	State
Boise (Ada County)	6%	6%
Idaho Falls (Bonneville County)	6%	6%
Pocatello (Bannock County)	6%	6%
Nampa (Canyon County)	6%	6%
Caldwell (Canyon County)	6%	6%
Coeur D Alene (Kootenai County)	6%	6%
Meridian (Ada County)	6%	6%
Rexburg (Madison County)	6%	6%
Moscow (Latah County)	6%	6%
Post Falls (Kootenai County)	6%	6%

When you have to collect Idaho sales tax

A remote seller has to register and collect Idaho sales tax once its sales into the state meet the economic nexus threshold: $100,000 in sales in the current or previous calendar year, per the state tax agency. A physical presence such as an office, employees or inventory creates nexus on its own. The Idaho sales tax guide covers registration and filing once you do.

Frequently Asked Questions

Using the calculator

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