Idaho Sales Tax: Rates, Rules, and How to Calculate It (2026)
Idaho keeps things relatively simple: the statewide sales tax rate is 6 percent, and most of the state charges exactly that. A limited number of resort cities and local districts can add a local-option tax, which nudges the combined rate as high as 9.4 percent in a few places. For most Idaho addresses, though, 6 percent is the whole story.
| Statewide base rate | 6% |
|---|---|
| Typical combined rate | 6%–9.4% |
| Are groceries taxed? | Taxable |
| Economic nexus threshold | ≈$100,000/yr (verify) |
| Taxing jurisdictions tracked | 323 |
| Get the local rate | Look up any Idaho ZIP or address instantly |
How much is sales tax in Idaho?
Idaho's state rate is 6 percent, and unlike home-rule states, Idaho lets only a narrow set of resort communities and auditorium districts add a local-option tax. That's why the combined rate stays at 6 percent across most of the state and only climbs—up to about 9.4 percent in spots like Farmington—where a local option is in effect. Across the 340 taxing areas we track in Idaho, the average combined rate is about 6.08 percent, very close to the base.
The practical upshot is that Idaho is far more uniform than most states, but it isn't perfectly flat. If you sell into a resort town with a local-option tax, the combined rate is higher than the 6 percent base, so it's still worth confirming the rate for the specific address rather than defaulting every Idaho sale to 6 percent.
What's taxed and what's exempt in Idaho
Groceries are taxable in Idaho at the full 6 percent state rate. Idaho offsets that with an income-tax grocery credit for residents rather than exempting food at the register, so retailers still collect tax on grocery sales. Clothing is also fully taxable.
Idaho does tax software as a service, so SaaS and many digital products are taxable here—an important difference from states that exempt them. Prescription medicine is exempt. Because Idaho taxes some digital categories that other states don't, confirm the treatment of a specific product rather than assuming it follows a neighboring state's rule.
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 6.084% means about $6.08 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 daily. 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 statewide sales tax rate is 6 percent, and most of the state charges exactly that. In a limited number of resort cities and local-option districts, the combined rate can rise to about 9.4 percent.
Are groceries taxed in Idaho?
Yes. Idaho taxes groceries at the full 6 percent rate. Instead of exempting food, the state provides residents an income-tax grocery credit to offset the cost, but tax is still collected at the point of sale.
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 the ZIP or full address into a rate lookup. Idaho is 6 percent in most places, but resort-city and local-option districts add tax on top, so confirming the address avoids under-collecting in those areas. Sefro's API returns the combined rate for any Idaho address in one request.
Is SaaS or digital software taxable in Idaho?
Yes, SaaS is taxable in Idaho. Software delivered as a service and many digital goods are subject to Idaho sales tax, unlike in several neighboring states. Clothing is taxable as well.
Does Idaho have local sales taxes on top of the state rate?
Yes, but only in limited areas. Idaho's 6 percent state rate applies everywhere, and only certain resort cities and local-option districts add their own tax, lifting the combined rate as high as 9.4 percent in places like Farmington. Most of the state stays at 6 percent.
Handle Idaho sales tax with one API call
Skip the rate tables and district lookups. Sefro returns the 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.