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Montana Sales Tax Calculator (2026)

Updated June 2026 · Written & fact-checked by the NumberBench editorial team · How we calculate

Calculate sales tax in Montana. The statewide base rate is 0% — Montana has no statewide sales tax. Enter an amount and add your local (county or city) rate to see the combined rate and total.

Montana has no general statewide sales tax (a few resort communities levy local ones). This tool lets you add any local rate that applies.
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Montana tax snapshot

In Montana, the statewide sales-tax base rate is 0% — the 49th-highest of the 50 states + DC, versus a national average near 5.11%. By the other measures, Montana property tax is about 0.74% (the 34th-highest) and its sales-tax base is 0% (the 49th-highest); montana levies a state income tax. For context, New Jersey has the highest effective property tax (2.23%) and Hawaii the lowest (0.27%); California has the highest statewide sales tax (7.25%) and Oregon has none (0%).

Compare across Montana: Paycheck · Property tax · Sales tax.

📊 Benchmark: the U.S. average combined sales-tax rate is ~7.5%, from 0% (five states) to ~9.5% (Louisiana/Tennessee). Tax Foundation, 2025.

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Montana has no statewide sales tax

Montana is one of a few states with no state-level sales tax, so the base rate is 0%. Some local jurisdictions may still levy their own tax — enter any local rate above to include it.

Sales tax by state

Jump to your state’s calculator:

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How it’s calculated

Sales tax = purchase amount × (state base rate + local rate). Your combined rate is Montana’s state base rate plus any county or city tax you enter.

State base rate as of the latest published rates; local rates vary by jurisdiction and change over time. Confirm your local combined rate. Estimate only.

Results update as you type and are estimates, not professional advice — verify important decisions with a qualified professional.

Worked example

A $100 purchase in Montana has $0.00 in sales tax at the 0% base rate, for a $100.00 total before any local tax.

Common mistakes

  • Adding only the state base rate and forgetting county or city taxes on top.
  • Applying the rate to a tax-included total instead of the pre-tax price.

Where it is used

  • Pricing products, quotes, or invoices for customers in Montana.
  • Checking the sales tax line on a receipt or purchase.

Frequently asked questions

What is the sales tax rate in Montana?

Montana has no statewide sales tax, though some local jurisdictions may add their own.

How do I find my local sales tax rate?

Your county or city tax authority, or the state Department of Revenue, lists combined rates by address or ZIP code.

Does this calculator include local taxes?

It applies the state base rate. Add your local rate in the field above to get the combined total.