How much is sales tax on a $100 purchase in Montana?

There is no state sales tax in Montana, so a $100 item costs $100.00 total (state tax: $0.00). Some local municipalities may levy their own tax.

How much is sales tax on a $500 purchase in Montana?

Montana has no state sales tax, so a $500 item costs $500.00 total (no state tax added).

How much is sales tax on a $1,000 purchase in Montana?

No state sales tax applies in Montana. A $1,000 item costs $1,000.00 (state tax: $0.00).

How do I calculate sales tax for Montana?

Montana has no state sales tax, so no calculation is needed at the state level. Multiply your price by any applicable local tax rate if your city levies one.

Montana Sales Tax Calculator | KalkWise

By the KalkWise Editorial Team Reviewed for accuracy Updated June 2026

What is the montana sales tax calculator?

In short

Montana has no state sales tax, so there is no state-level tax on most purchases. Montana has no sales tax at either the state or local level.

This Montana sales tax calculator applies the 0% state base rate to any purchase price and shows the tax amount and total cost instantly. Montana has no sales tax at either the state or local level.

How to use this calculator

1Enter the pre-tax price of your item or service.
2Montana is pre-selected — the 0% state rate is filled in automatically.
3Adjust the rate field if your city or county adds a local surcharge on top of the state rate.
4Read the sales tax amount and total (pre-tax + tax) below.
5Use the reverse mode to back-calculate the pre-tax price from a tax-inclusive total.

The formula

tax amount=price×rate100

total=price+tax amount

reverse:price=total1+rate100

Montana state sales tax = $0 (no state sales tax). Total price = pre-tax price.

pre-tax price: — The listed price of the item before any tax is added
tax rate: — Montana state base sales tax rate: 0%
sales tax: — Dollar amount of tax added to the pre-tax price
total price: — Pre-tax price plus sales tax — what you actually pay

Worked example

The scenario

Buying a $100 item at the Montana state base sales tax rate of 0%.

gives

The result

No state sales tax applies. You pay exactly $100.00.

Common use cases

Checking the total cost of a purchase before buying in Montana
Comparing the tax burden on a large purchase (car, appliance, electronics) across states
Calculating the pre-tax price from a receipt that shows only the total
Budgeting for a trip or online order shipped to Montana

Limitations & assumptions

This calculator uses the Montana state base rate (0%). County and city add-ons vary — enter your actual combined local rate for a precise figure.
Some categories (groceries, prescription drugs, clothing) may be exempt or taxed at a reduced rate under state law.
Rates change annually — verify against the official state department of revenue before filing or remitting tax.
This is an estimate tool, not tax advice.

Frequently asked questions

Montana has no state sales tax — the rate is 0%. Montana has no sales tax at either the state or local level.

Disclaimer: KalkWise calculators are provided for general informational and educational purposes only and do not constitute financial, investment, tax, or legal advice. Results are estimates based on the figures you enter and the assumptions described above. Actual outcomes will vary. Consult a qualified professional before making financial decisions.

Tax details