Idaho Sales Tax: Rates, Rules, and How to Calculate It (2026)
Idaho's tax picture is deceptively complex—the state rate is 6.5%, but some areas have no local tax at all (a 0% combined minimum) while others reach 9.4%. Your address is the only way to know for sure.
| Statewide base rate | 6.5% |
|---|---|
| Typical combined rate | 0%–9.4% |
| Are groceries taxed? | Taxable |
| Economic nexus threshold | ≈$100,000/yr (verify) |
| Taxing jurisdictions tracked | 343 |
| Get the exact rate | Look up any Idaho ZIP or address instantly |
How much is sales tax in Idaho?
The base is 6.5%, but combined rates range from zero in some jurisdictions up to 9.4% in Farmington. That full spectrum means one address might pay no sales tax while a town five miles away pays 9.4%—an enormous swing caused by 343 different local taxing jurisdictions making independent decisions.
Idaho's patchwork of local taxes makes ZIP code lookups unreliable. A single ZIP might contain areas with 0% combined rates and areas with 9.4%, so you have to enter the street address to get the actual number that applies to your sale.
What's taxed and what's exempt in Idaho
Both groceries and clothing are taxable in Idaho. Unlike many states, you'll pay tax on food purchases, so factor that into your grocery budget.
SaaS subscriptions and digital software are taxable in Idaho. Prescription medicine is exempt. Restaurant food and prepared items are subject to the combined rate. Don't assume anything is tax-free—verify the product category with a lookup to be certain.
Do you have to collect Idaho sales tax? (Economic nexus)
Like most states after the 2018 Wayfair decision, Idaho requires out-of-state sellers to register and collect once their sales into the state cross an economic-nexus threshold. That line is commonly around $100,000 of sales into Idaho per year, and some states also count a number of separate transactions — but the exact figure, and whether the transaction count still applies, change from time to time. Confirm Idaho's current threshold before you rely on it.
If you sell into Idaho from out of state, the practical question is whether you've crossed that line. Watching your sales into each state is how you know when you're on the hook — and it's the kind of thing that's easy to miss until a notice shows up.
Nexus rules change often and vary by state (reviewed 2026-01-01). This is general information, not tax advice — confirm your obligations with the Idaho Department of Revenue or a tax professional.
How to calculate Idaho sales tax
The math itself is simple: multiply the taxable price by the combined rate for the buyer's location. A $100 order at 6.044% means about $6.04 in tax. The hard part is getting the right rate for every address, keeping it current as rates change, and doing it fast enough to run inside a checkout.
That's what Sefro does. One API call returns the combined state, county, city, and special-district rate for any US address, sourced from state Departments of Revenue and refreshed weekly. You can also calculate the full tax on an order, validate addresses, and pull return-ready reports. See how the data is sourced or pricing to start.
Look up the Idaho sales tax rate for any ZIP
Enter an Idaho ZIP code to see the live combined rate from the Sefro API.
Frequently asked questions
What is the sales tax rate in Idaho?
Idaho's state sales tax is 6.5%, but local taxes push combined rates anywhere from 0% to 9.4% depending on your location.
Are groceries taxed in Idaho?
Yes. Groceries are subject to Idaho's combined state and local sales tax.
Do I have to collect Idaho sales tax if I sell online?
Once your sales into Idaho cross its economic-nexus threshold — commonly around $100,000 a year, sometimes with a transaction count — you generally must register and collect. Because states adjust these rules, check Idaho's current figure before relying on it.
How do I find the exact rate for an Idaho address?
Enter your exact street address (not just ZIP code) into a lookup because neighboring areas can have dramatically different rates. Sefro's API provides the combined rate for any Idaho address.
Is SaaS or digital software taxable in Idaho?
Yes. SaaS and digital software are taxable in Idaho.
Does Idaho have local sales taxes on top of the state rate?
Idaho has 343 local taxing jurisdictions, and some areas have no local tax while others add significant amounts, making combined rates swing from 0% to 9.4%.
Handle Idaho sales tax with one API call
Skip the rate tables and district lookups. Sefro returns the exact combined rate for any Idaho address in one request — start with a free trial.
Rates and rules on this page are provided for general information only and are not tax or legal advice. Rates change; confirm the current rate and your filing obligations with the Idaho Department of Revenue or a qualified professional. See our Terms.