Montana Sales Tax Calculator (State & Local Rates)

Montana has no statewide general sales tax and, with a small number of narrow resort-area exceptions in a handful of tourist towns, no meaningful local sales tax either. The 0.00% rate used throughout this calculator reflects what the overwhelming majority of retail transactions in the state actually pay.

That absence of a sales tax shapes retail pricing across Montana in a way shoppers in most other states never experience. The sticker price stays close to the final price. It also means Montana businesses selling into other states still have to learn and follow those states' sales tax rules on the buyer's end, even though they collect nothing on the seller's end at home.

Montana funds its state and local government primarily through property tax and individual income tax instead, which is a different revenue mix than most of its neighbors in the Mountain West. For anyone comparing the cost of a large purchase (a vehicle, equipment, building materials) against a bordering state like Idaho or Wyoming, the missing sales tax line is the single biggest variable in that comparison.

Montana has no general sales tax. There is no state rate and no county rate, so a $1,000 purchase costs $1,000 and this calculator returns zero. The narrow exception is the resort tax: a small number of tourism-dependent communities, places such as Whitefish, Big Sky and West Yellowstone, are permitted to levy a local tax on lodging, prepared food and some retail. Those levies are limited to qualifying resort communities and are not part of a statewide average, so they do not appear in this result.

Both rate terms are zero, but the general form still applies:

The calculator still runs the full sequence:

1. Take the entered amount as the base. No adjustments are made to the price before tax is computed.
2. No item-level exemption filtering. With no general sales tax there is no taxable base to filter.
3. Compute the state portion. The base is multiplied by the state statutory rate.
4. Apply the local surcharge. Montana's resort community taxes are not included in a statewide average, so this term is zero and the result is zero.
5. Sum and total. The state and local amounts are added to give total tax, and the total is added back to the price to give the out-of-pocket cost.

For a $1,000 retail purchase in Montana:

1. Starting purchase price. The buyer rings up a $1,000.00 taxable retail purchase in Montana, the baseline amount before any tax consideration.
2. State statutory rate applied. Montana is one of the five NOMAD states (alongside the other four with no general sales tax), so its state sales tax rate is 0.00%: $1,000.00 × 0.00% = $0.00 in state tax owed.
3. No state tax due. Because the statutory rate is zero, the state sales tax line item is $0.00 regardless of the purchase amount, whether it is $10 or $10,000.
4. Total out-of-pocket cost. With no state sales tax added, the buyer's total out-of-pocket cost equals the original purchase price: $1,000.00.

This example reflects only the statewide rate. Some localities within Montana may still impose limited local option or municipal taxes on specific purchases, so a shopper's actual receipt total can differ slightly from the $1,000.00 shown here depending on where the purchase takes place.

The twelve-row schedule under the result steps the purchase amount from $166.67 in row 1 to $2,000.00 in row 12, and the "State Tax" and "Local Tax" columns print $0.00 at every single row. The "Total Cost" column is therefore a copy of the purchase column: $166.67 in row 1 and $2,000.00 in row 12. A $30,000 vehicle purchase returns $0.00 of tax and $30,000.00 out the door.

Each additional $100 of spending costs $0.00 in Montana sales tax. That is the marginal figure, and it holds at every purchase size the input accepts.

The local surcharge toggle does nothing here. Switch "Include Average Local / County Surcharge" off and the answer is still $0.00 on $1,000, because Montana's stored average local rate is 0.00%. On the sibling pages in this family that switch moves the number: it is the only input on this page that is genuinely inert.

The reverse question, and why it has no answer. "How much can I spend before the sales tax reaches $100" is the natural query, and here there is none: at $30,000 the tax is still $0.00, and the input's $10,000,000 ceiling would return $0.00 as well.

What the zero is worth, in figures from the neighbouring calculators. The same $1,000 purchase returns $69.80 of tax on the Nebraska page, $82.40 on the Nevada page and $76.75 on the New Mexico page. On a $30,000 purchase those become $2,094.00, $2,472.00 and $2,302.50. That gap, not the $0.00 itself, is what a border shopper is actually deciding about.

One thing the $0.00 genuinely omits. Montana's resort communities levy their own local tax on lodging, prepared food and some retail. That levy exists, it is not part of any statewide average, and the calculator has no input for it, so a purchase in one of those towns is understated by the whole resort tax.

• Resort community taxes are not modelled. They are levied by qualifying tourism communities on lodging, prepared food and some retail, are excluded from the statewide average, and no input on this page reaches them.
• The local toggle has no effect, because Montana's stored average local rate is 0.00%.
• Statutory exemptions on unprepared groceries, prescription medications, or manufacturing equipment.
• Special industry excise taxes (lodging hotel taxes, vehicle rental fees, alcohol/tobacco excise).
• Use tax compliance on out-of-state untaxed online purchases.
• B2B resale certificate exemptions or direct pay permit programs.

• Confusing State and Combined Rates: Quoting the state base rate without factoring in local city and county add-on taxes.
• Overlooking Consumer Use Tax: Failing to self-report and remit use tax on untaxed out-of-state purchases on your state income tax return.
• Missing Annual Sales Tax Holidays: Many states offer annual tax-free weekends for back-to-school items, severe weather supplies, or energy-efficient appliances.
• Failing to Collect Resale Certificates: Selling wholesale without collecting valid exemption certificates exposes sellers to full sales tax liability upon audit.

• Montana Department of Revenue: 2026 Sales and Use Tax Rate Schedules. mtrevenue.gov
• Streamlined Sales Tax Governing Board (SSTGB): State Taxability Matrix. streamlinedsalestax.org/for-businesses/taxability-matrix