Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Montana has no state-level sales tax -- add local sales tax (if any applies where you are) onto a price, or reverse a tax-inclusive total.
Montana's state base sales tax rate is pre-filled at 0% (as of September 17, 2026, per the Tax Foundation and U.S. Department of Labor). Most cities/counties add local sales tax on top, so your actual combined rate at checkout is often higher -- edit the rate below if you know your local combined rate, and always verify at your state's department of revenue for anything that matters.
Montana does not levy a state-level sales tax (as of September 17, 2026, per the Tax Foundation and U.S. Department of Labor). Depending on where exactly you are, a local jurisdiction may still charge its own sales tax on top -- this tool pre-fills 0% as the state-level starting point, and you can edit the rate to your actual local rate if one applies.
Enter a pre-tax amount to add Montana's sales tax onto it, or switch to "Reverse" mode and enter a tax-inclusive total to back out the pre-tax price. The rate field is pre-filled but fully editable.
Montana is one of 5 jurisdictions in this data set with no state-level sales tax at all (Alaska, Delaware, Montana, New Hampshire, Oregon). Every other jurisdiction listed charges a state rate between 2.9% and 7.25%, with a simple unweighted average of about 5.66%.
Jurisdictions with the state rates closest to Montana's are Alaska (0%), Delaware (0%), New Hampshire (0%). 4 other jurisdictions (Alaska, Delaware, New Hampshire, Oregon) charge exactly the same state rate. Keep in mind that a state rate is only the first layer: the number that matters for a real purchase is the combined rate at the spot where you buy.
For context, Montana's general minimum wage is $10.85/hour -- see the Montana minimum wage calculator for how far that goes after this tax.
Because Montana's state rate is 0%, the state adds nothing to a price. If a local jurisdiction where you shop did charge a tax, for example a hypothetical 2%, a $200.00 purchase would carry $4.00 in tax for a $204.00 total -- enter that local figure in the rate field to model it.
In reverse mode at a 0% rate the pre-tax price equals the total, since nothing was added. Reverse mode is most useful when a local rate applies to you and you only have the tax-inclusive total from a receipt.
Taxable spending of $12,000.00 in a year carries $0.00 of Montana state sales tax. Taxable spending of $24,000.00 in a year carries $0.00 of Montana state sales tax. Taxable spending of $36,000.00 in a year carries $0.00 of Montana state sales tax. For comparison, the same three spending levels at the 5.66% average state rate among taxing jurisdictions would come to $679.30, $1,358.61, $2,037.91 respectively, so the state-level saving in Montana is the full amount shown. Only a share of household spending is actually taxable (groceries, rent, and services are often exempt or taxed differently), so treat these as ceilings for planning rather than predictions of your real bill.
The 0% figure here is Montana's state-level rate only, pulled from a single published table -- it doesn't capture city/county add-on taxes where Montana permits them, special district taxes, or the product-specific rules that tax groceries, clothing, prepared food, or digital goods differently from ordinary merchandise. For a large purchase like a vehicle or appliances, look up the exact combined rate for the delivery address with Montana's own tax agency and enter that in the rate field instead. Businesses collecting and remitting sales tax have their own separate registration and filing requirements this calculator doesn't cover.
Montana itself charges no state sales tax, but check whether your specific city/county charges a local sales tax, since that would be the rate that actually applies to you.
Your state's Department of Revenue (or equivalent) publishes the current official rate and any local rate lookups -- always verify there for anything that matters, since rates can change.
At Montana's 0% state rate the state adds nothing: a $100.00 purchase stays $100.00 before any local tax.
With a 0% state rate the receipt total already equals the pre-tax price, unless a local tax applies.
Montana sets its base sales tax at 0%, meaning no state sales tax applies. Compared with the 5.106% average across 51 jurisdictions, Montana is 5.106% below the average and ranks tied for 47th highest of 51 jurisdictions (with 4 others). 5 of them charge no state sales tax at all.
Montana's general minimum wage is $10.85 an hour -- see the Montana minimum wage calculator for how far that goes after this tax.
| Purchase price | State sales tax | Total at the state rate |
|---|---|---|
| $20 | $0.00 | $20.00 |
| $50 | $0.00 | $50.00 |
| $100 | $0.00 | $100.00 |
| $500 | $0.00 | $500.00 |
| $1,000 | $0.00 | $1,000.00 |
| $10,000 | $0.00 | $10,000.00 |
This is the state rate only. Many cities and counties add their own tax on top, and some items (groceries, clothing, medicine) are taxed differently, so the rate at your register can be higher than the figure above.
Of Montana's 4 bordering states, 4 charge a higher rate and 0 charge a lower one.
| Neighbouring state | State sales tax rate |
|---|---|
| Idaho | 6% |
| North Dakota | 5% |
| South Dakota | 4.2% |
| Wyoming | 4% |
Does Montana have a state sales tax?
No -- Montana is one of the 5 states with no state-level sales tax.
How much sales tax would you pay on a $250 purchase in Montana?
At the 0% state rate, a $250 purchase adds $0.00 in state sales tax, for a total of $250.00 before any local add-on.
Is Montana's sales tax higher or lower than the national average?
Montana's 0% rate is 5.106% below the average of 5.106% across the 51 jurisdictions in this dataset, tied for 47th highest of 51 jurisdictions (with 4 others).
Do city or county taxes add to Montana's rate?
Often, yes. The 0% figure above is the state-level rate only; many cities and counties layer their own local sales tax on top, so the rate at checkout can be higher.
Rates are as of September 17, 2026, per the Tax Foundation and U.S. Department of Labor. Confirm the rate for your exact address with your state department of revenue.
Reference: Internal Revenue Service