What is the sales tax rate in Great Falls, Montana?

The combined sales tax rate in Great Falls, Montana is 0.000% as of 2026. This includes the Montana state rate of 0.000% plus local jurisdiction taxes.

How is the Great Falls sales tax calculated?

Multiply your purchase amount by 0.000% (or 0.00000) to get the tax owed. For example, a $100 purchase incurs $0.00 in sales tax.

What is the Montana state sales tax rate?

The base Montana state sales tax rate is 0.000%. Local jurisdictions may add additional taxes on top of this rate.

Does Great Falls have a county sales tax?

Great Falls does not levy an additional county-level sales tax beyond the state base rate.

When was the Great Falls sales tax rate last updated?

The Great Falls sales tax rate was last verified on March 27, 2026. We cross-reference all rates against the official State Department of Revenue data.

Live Data: April 2026

Great Falls, MT Sales Tax Rate 2026

The combined sales tax rate in Great Falls, Montana is 0.000%.

Combined Rate 0.000%

State0.000%

Great Falls Sales Tax Breakdown

Jurisdiction	Rate
Montana State Sales Tax	0.000%
Total Combined Rate	0.000%

Which County Is Great Falls In?

Great Falls falls within Cascade, Montana. Cascade imposes a 0.000% county-level sales tax in addition to the Montana state base rate.

Great Falls ZIP Codes

The following ZIP codes are mapped to Great Falls for sales tax purposes. All listed codes apply the 0.000% combined rate.

59401 59404 59405

Business Nexus in Montana

Economic Nexus Threshold

Selling into Montana from out of state? Once you exceed $0 in annual sales or 0 transactions, you must register and collect Montana sales tax.

FAQ: Great Falls Sales Tax

The combined sales tax rate in Great Falls, Montana is 0.000% as of 2026.

Multiply your purchase price by 0.000% to find the tax owed. A $500 purchase would include $0.00 in sales tax.

Groceries are generally taxable in Montana. Check the official Department of Revenue for specific exemptions.

Vehicle purchases in Great Falls are subject to the 0.000% combined rate, though some states apply different rules for vehicle sales. Verify with the Montana Department of Revenue or DMV.

Register for a sales tax permit through the official Montana Department of Revenue website. Registration is typically free and required before collecting any sales tax.

Sales Tax Calculator

Using 0.000% rate for Great Falls, MT

Purchase Amount ($)

Tax Amount $0.00

Total with Tax $100.00

Rate applied: 0.000% combined

Official Tax Authority

Montana Department of Revenue

Filing Deadline: Montana has no general sales tax. Business license taxes apply; contact DOR for specifics.

Visit Official Portal (406) 444-6900