Key takeaways
- Idaho sales tax rates: The state rate is 6%, and some resort cities add up to about 3%, for combined rates of roughly 9%. Groceries are taxed at the full 6%.
- Economic nexus: Remote sellers must collect once sales to Idaho customers exceed $100,000 in the current or previous calendar year. There is no transaction-count threshold.
- Filing & penalties: Returns are due on the 20th of the month after the period. Late filing costs 5% per month and late payment 0.5% per month, each up to 25%.
Idaho sales tax key facts (2026)
| Item | Idaho |
|---|---|
| Statewide rate | 6% |
| Local option taxes | Up to ~3% in some resort cities (max ~9%) |
| Economic nexus threshold | $100,000 (no transaction count) |
| Sourcing | Destination-based |
Collect and file Idaho sales tax with Taxually: LumaTax monitors your nexus, registers you and files your returns.
Is SaaS taxable?
No.
| Item | Idaho |
|---|---|
| Groceries | Taxable at 6% (income-tax grocery credit available) |
| Return due date | 20th of the month after the period |
| Governing agency | Idaho State Tax Commission |
What is the sales tax rate in Idaho?
Idaho’s statewide sales and use tax rate is 6%. Most of the state charges only that rate, but certain resort cities and auditorium districts (such as Sun Valley and Ketchum) add a local option tax of up to about 3%, pushing the combined rate as high as roughly 9% in those areas.
Because local option taxes apply only in specific places, the rate depends on the buyer’s location.
Do you have sales tax nexus in Idaho?
Nexus is the connection that obligates your business to collect and remit Idaho sales tax. You can establish it two ways — physically or economically. Either one is enough.
Physical nexus
You have physical nexus if you have a tangible presence in Idaho, such as:
- An office, warehouse, sales or sample room, or storage place in Idaho
- A stock of goods (inventory) kept in the state
- A salesperson, agent, or representative who comes to Idaho to sell, deliver, install, or take orders
- Renting or leasing property (other than real property) used in Idaho
- Servicing tangible personal property in Idaho
Economic nexus
Effective June 1, 2019, out-of-state sellers have economic nexus once their sales to Idaho customers exceed $100,000 in the current or previous calendar year. Idaho uses a dollar threshold only — there is no transaction-count test (so the “200 transactions” rule that applies in many states does not apply here).
What is taxable in Idaho?
Most tangible personal property is taxable, with exceptions such as prescription drugs. Services are generally not taxable unless they involve producing or fabricating a product. Prewritten (canned) software is taxable, whether delivered on media or downloaded.
Is SaaS taxable in Idaho?
No. Idaho does not tax SaaS — remotely accessed software and digital subscriptions are exempt. (Downloaded prewritten software, by contrast, is taxable.)
How is food taxed in Idaho?
Idaho is unusual in taxing groceries at the full 6% rate (prepared meals are taxable too). To offset this, Idaho residents can claim a grocery tax credit on their state income tax — but that doesn’t change your obligation to collect tax at the point of sale.
How to register for an Idaho sales tax permit
Register before collecting. Taxually can handle it, or you can apply online through the Taxpayer Access Point (TAP) or by paper Form 850. Registration is free.
Have ready: personal identification (name, SSN), business identification (name, owners, address, incorporation date, EIN), entity type, your reason for applying, and the date you’ll start collecting.
How to collect sales tax in Idaho
Idaho is destination-based — charge tax based on where the buyer takes possession. Apply the 6% state rate plus any local option tax that applies at the buyer’s location. Remote sellers with nexus collect the same way.
Filing and paying Idaho sales tax
Most businesses file monthly; those owing less than $750 per quarter may file quarterly, and low-volume sellers may file semiannually or annually. Returns are due the 20th of the month following the period (next business day if a weekend or holiday).
File and pay through TAP or by mail. Taxually’s software automates the full process.
Penalties for late or non-compliant filing
Failing to file or pay on time triggers these penalties:
- Late filing: 5% of the tax due per month, up to 25%.
- Late payment: 0.5% of the tax due per month, up to 25%.
- Interest accrues on unpaid tax at the current rate.
Frequently asked questions
What is the sales tax rate in Idaho in 2026?
The state rate is 6%. A few resort cities and auditorium districts add a local option tax of up to about 3%, so combined rates can reach roughly 9% in those areas.
What is the economic nexus threshold for Idaho?
$100,000 in sales to Idaho customers in the current or previous calendar year. Idaho has no transaction-count threshold.
Is SaaS taxable in Idaho?
No. Remotely accessed software and digital subscriptions are exempt. Downloaded prewritten software is taxable.
Are groceries taxed in Idaho?
Yes, at the full 6% rate. Idaho residents can claim a grocery tax credit on their income tax to offset it.
When are Idaho sales tax returns due?
The 20th of the month following your reporting period.
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