Montana Sales Tax Calculator 2025

Montana has no statewide sales tax. No general sales tax (a NOMAD state); some resort-area local taxes. On a typical retail purchase you pay no state sales tax, so the tax shown for Montana in this calculator is $0.00. Bear in mind that if you bring goods into another state, that state may charge use tax. For exact local rules, check the relevant municipal authority before a large purchase.

In Montana, groceries are exempt from sales tax and clothing is exempt from sales tax. No general sales tax (a NOMAD state); some resort-area local taxes. Prepared food and restaurant meals are generally taxable even where unprepared groceries are exempt. Because exempt categories are taxed at $0 (or a reduced rate in some states), the combined 0.00% rate this calculator applies will overstate the tax on those specific items — apply it only to taxable goods. For the precise treatment of a particular product, consult the Montana department of revenue.

To calculate sales tax, multiply the pre-tax price by the combined sales tax rate and add it to the price: Total = Price × (1 + rate). For Montana at 0.00%, a $50 item costs $50.00 with $0.00 in tax. To work backward from a tax-included total — a reverse sales tax calculation — divide the total by (1 + rate): Net = Total ÷ (1 + rate). This is useful for separating the tax on a receipt for expense reports or bookkeeping. The calculator above does both: choose "Add tax to amount" for a pre-tax price, or "Extract tax from total" to recover the price and tax from a tax-inclusive amount.

Yes, in almost all cases. Since the 2018 Supreme Court decision in South Dakota v. Wayfair, Montana — like other states that do levy sales tax — can require out-of-state online sellers to collect sales tax once they cross an economic-nexus threshold (commonly $100,000 in sales or 200 transactions). Major retailers and marketplaces like Amazon, eBay, and Etsy now collect applicable sales tax automatically based on your shipping address. If a seller doesn't collect, you may owe use tax to your home state. Because Montana has no statewide sales tax, purchases shipped to Montana generally have no state sales tax applied.

Sales tax holidays are temporary periods — usually a weekend — when a state suspends sales tax on certain goods such as clothing, school supplies, or emergency-preparedness items, subject to per-item price caps. About 17 states hold at least one each year. Montana has no statewide sales tax year-round, so a sales tax holiday is moot for state-level tax here.