Montana Auto Tax
Estimate sales or use tax on a vehicle purchase in Montana.
About Montana Auto Tax
Car purchase tax in Montana: the tax applies to the price minus trade-in (where allowed) at the state/local car-sales-tax rate you enter, typically 3–8% plus local additions.
Formula
Tax
Tax = (price − trade-in) × rate + fees
Worked example
With the default values below, Montana Auto Tax returns Estimated Vehicle Tax of $2,100.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Vehicle priceminimum 0
- 35,000
- Trade-in valueminimum 0
- 5,000
- Sales/use tax rateaccepts 0–15
- 7
- Title/registration feesminimum 0
- 200
Results
- Estimated Vehicle Tax
- $2,100.00
- Taxable Amount
- $30,000.00
- Total Cost
- $37,300.00
Step by step
- 1Values used
- 2Tax
- 3Estimated Vehicle Tax= 2,100.00
- 4Taxable Amount= 30,000.00
- 5Total Cost= 37,300.00
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- Estimate — exact rules vary by state and locality.
- This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Montana rules are not built in
Montana-specific rules are not built into this calculator. It uses the same general calculation as Alaska Auto Tax. Check current figures with Montana’s official source before relying on the result.
Tax year: not verified · Source: none built in
Estimate — exact rules vary by state and locality.
Frequently Asked Questions
Is the trade-in always tax-deductible?
Many states allow subtracting the trade-in, but rules vary.
How accurate is this estimate?
Rates are approximate reference values. Local rates, exemptions and rules can differ, so treat the output as a planning figure only.