Montana Sales Tax Calculator
Add or remove Montana sales tax from a price, using the state rate plus the average local rate.
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About the Montana Sales Tax Calculator
This Montana sales tax calculator adds sales tax to a price or removes it from a total. It starts with the average combined Montana rate of 0.00% (state rate 0.00% plus average local rate). Change the rate to match your city or county.
How to use it
- Enter a price or a total.
- Keep the average combined rate or type your local rate.
- Choose add or remove sales tax and press Calculate sales tax.
Montana sales tax rate in 2026
Montana has no statewide sales tax and no local sales tax in the Tax Foundation 2026 data.
Source: Tax Foundation, 2026 state and local sales tax rates (as of July 1, 2026).
Montana sales tax examples at 0.00%
| Price | Sales tax | Total |
|---|---|---|
| $10 | $0.00 | $10.00 |
| $25 | $0.00 | $25.00 |
| $50 | $0.00 | $50.00 |
| $100 | $0.00 | $100.00 |
| $250 | $0.00 | $250.00 |
| $500 | $0.00 | $500.00 |
| $1,000 | $0.00 | $1,000.00 |
How to calculate sales tax
Sales tax = price × rate. To remove tax from a total, divide the total by (1 + rate). For example, $108 at 8% includes $8 of tax on a $100 price.
Frequently asked questions
What is the sales tax in Montana?
There is no statewide or local sales tax. Your actual rate depends on your location.
Does Montana have local sales tax?
No, not in the 2026 data.
How do I calculate sales tax in Montana?
Multiply the price by the sales tax rate, then add it to the price. The calculator above does it for you.
What is $100 with sales tax in Montana?
At the average combined rate of 0.00%, $100 costs $100.00.
Where can I find my exact Montana rate?
Use the Montana department of revenue rate lookup tool for your address.
Last reviewed: November 2026. Rates are averages. Confirm your local rate with the state department of revenue.