Montana Sales Tax: Rates, Rules, and How to Calculate It (2026)
Montana has no state sales tax—and no local sales tax either. That's it. If you're selling in Montana, there's simply no sales tax rate to calculate or remit. It's one of the most tax-friendly states for businesses.
| Statewide base rate | None (no state sales tax) |
|---|---|
| Typical combined rate | 0% in most areas |
| Are groceries taxed? | No state tax |
| Economic nexus threshold | None |
| Taxing jurisdictions tracked | 422 |
| Get the exact rate | Look up any Montana ZIP or address instantly |
How much is sales tax in Montana?
Montana's state rate is 0 percent. The combined minimum is 0 percent and the combined maximum is also 0 percent. While Montana has 422 local jurisdictions for other purposes, none of them levy a sales tax. Your effective rate everywhere in Montana is zero.
Because there's no sales tax in Montana at all, there's no reason to look up an address or zip code. The rate is identical everywhere in the state: zero. Address-based lookups aren't needed for sales tax purposes in Montana.
What's taxed and what's exempt in Montana
Groceries are not taxed in Montana, and clothing is not taxed. Montana's zero-sales-tax policy covers both of these categories completely.
SaaS and software are not taxed in Montana. Prescription medicine is not taxed. Prepared and restaurant food is not taxed. Montana exempts everything from sales tax.
Do you have to collect Montana sales tax? (Economic nexus)
Because Montana has no state sales tax, there's no economic-nexus threshold and nothing to register for or collect at the state level.
If you sell into Montana 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 Montana Department of Revenue or a tax professional.
How to calculate Montana sales tax
The math itself is simple: multiply the taxable price by the combined rate for the buyer's location. A $100 order at a local combined rate of, say, 5% means about $5.00 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 Montana sales tax rate for any ZIP
Enter a Montana ZIP code to see the live combined rate from the Sefro API.
Frequently asked questions
What is the sales tax rate in Montana?
Montana has no sales tax. The rate is 0 percent everywhere in the state, for every product and service. You won't owe any sales tax on any transaction, regardless of what you're selling or where in Montana the customer is located.
Are groceries taxed in Montana?
No, groceries are not taxed in Montana. There's no sales tax at all, so groceries—along with everything else—are completely untaxed.
Do I have to collect Montana sales tax if I sell online?
No. Montana doesn't have a state sales tax, so there's no obligation to collect one.
How do I find the exact rate for a Montana address?
You don't need to look up a Montana address for sales tax purposes because there is no sales tax to calculate. The rate is always zero everywhere. Even an API lookup will return 0 percent for any address in the state.
Is SaaS or digital software taxable in Montana?
No, SaaS and digital software are not taxable in Montana. Montana has no sales tax whatsoever, so digital products are entirely untaxed.
Does Montana have local sales taxes on top of the state rate?
No, Montana has no local sales taxes at all. There's no state rate and no local add-ons anywhere in the state. Montana is one of a handful of states with zero sales tax.
Handle Montana sales tax with one API call
Skip the rate tables and district lookups. Sefro returns the exact combined rate for any Montana 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 Montana Department of Revenue or a qualified professional. See our Terms.