How Montana Sales Tax Works
Montana does not charge a general state sales tax. Most purchases of goods are tax-free at the state level — there is no statewide rate to add to retail prices.
Montana has no general sales tax — almost unique outside the no-income-tax states. The 2026 top rate also dropped from 5.9% to 5.65%.
How Montana Compares to Neighboring States
Sales tax on a $1,000.00 purchase in Montana versus neighboring states, using each state's average combined rate (state + local):
| State | State Rate | Combined Rate | Tax on $1,000 | vs. Montana |
|---|---|---|---|---|
| Montana (here) | 0.00% | 0.00% | $0.00 | — |
| Idaho | 6.00% | 6.03% | $60.30 | +$60.30 |
| Wyoming | 4.00% | 5.44% | $54.40 | +$54.40 |
| South Dakota | 4.20% | 6.11% | $61.10 | +$61.10 |
| North Dakota | 5.00% | 7.04% | $70.40 | +$70.40 |
A negative "vs." figure means a lower sales tax bill on the same purchase. Specific addresses can vary materially from the state-wide average.
Frequently Asked Questions
What is the Montana sales tax rate for 2026?
Montana has no general state sales tax.
Is sales tax calculated before or after discounts in Montana?
Montana follows the standard rule used by virtually all states: sales tax is calculated on the final discounted price, not the original price. If a $200 item is on sale for $150, you pay sales tax on $150. Manufacturer coupons can be treated differently in some states.
How is this Montana sales tax estimate calculated?
Montana has no general state sales tax — the calculator applies a 0% state rate. Enter any local rate manually if you're shopping in a jurisdiction that imposes one.