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Verified April 2026

Montana Sales Tax Rates: 2026 County Guide

Complete sales tax breakdown for all 54 counties in Montana. Select a county to see city-level rates and How-To guides.

Rates verified: March 2026
Combined Rate 0.000%
State0.000%

Montana Base State Tax Rate

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

Economic Nexus Threshold

If your business exceeds $0 in annual Montana sales or 0 transactions, you must register and collect sales tax — even from out of state.

Avg Local Tax Rate

The average combined local tax rate across Montana is 0.00%. The highest local rate is 0.00%.

All 54 Montana Counties

Sales Tax Calculator

Using 0.000% rate for Montana

$
Tax Amount $0.00
Total with Tax $100.00

Rate applied: 0.000% combined