Montana State Income Tax Calculator
Calculate your 2026 Montana state income tax. See your bracket breakdown, effective rate, and how Montana compares to neighboring states.
Your Tax Inputs
The annual amount is gross income minus entered pre-tax deductions and modeled federal and state income tax. Monthly and weekly amounts divide it by 12 and 52. These allocations exclude Social Security and Medicare (FICA), local taxes, other payroll taxes, and unmodeled paycheck deductions. They do not estimate paycheck take-home or actual withholding.
Effective State Income Tax Rate vs Neighboring States
About Montana state taxes (Tax year 2026)
For 2026, Montana taxes the first $47,500 of ordinary taxable income for single filers, $95,000 for joint filers or $71,250 for heads of household at 4.7%. Ordinary income above those amounts is taxed at 5.65%. For 2026, Montana uses federal basic standard deductions of $16,100 for single filers, $32,200 for joint filers and $24,150 for heads of household. This ordinary-income estimate excludes additional deductions, net long-term capital gains, other adjustments and credits.
Montana has no state or local sales tax. Some resort communities may charge a small local resort tax.
Montana's top rate of 5.65% is above the national average, but the complete absence of sales tax makes its overall tax burden moderate compared to most states.
Filing in Montana: returns for tax year 2026 are administered by the Montana Department of Revenue and are generally filed in 2027 by the federal April deadline unless Montana declares a state-specific extension. Tax type on this return: Progressive. Top marginal rate: 5.65%. State sales-tax rate: 0%. For the most current contact info, see the Federation of Tax Administrators directory.
Montana — What is Montana's income tax rate? For 2026, Montana taxes the first $47,500 of ordinary taxable income for single filers, $95,000 for joint filers or $71,250 for heads of household at 4.7%. Ordinary income above those amounts is taxed at 5.65%.
Montana — Does Montana have a sales tax? No, Montana has no state or local sales tax. It is one of five states with no sales tax. Some resort areas may charge a small local resort tax on lodging and restaurants.
Montana — How does Montana fund its government without sales tax? Montana relies on income taxes, property taxes, resource extraction taxes (mining, oil, gas), and various fees to fund state and local government services.
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How this page is reviewed
See methodology, assumptions & sources
| Risk tier | High YMYL |
|---|---|
| Author | Calculover Editorial Team Tax education |
| Editorial owner | Calculover Tax & Payroll Desk State-tax methodology owner |
| Reviewer | Calculover Editorial Review Government-source and limitation review |
| Last reviewed | 2026-11-06 |
| Last verified | 2026-11-06 |
| Data effective date | 2026-01-01 |
| Jurisdiction | Montana |
Methodology
These pages estimate annual state income tax for the selected 2026 jurisdiction and filing status. The route's coverage panel identifies the supported income basis, deductions, credits and exclusions.
Assumptions
- Enter the income basis and eligible pre-tax deductions requested by the calculator; gross wages, federal AGI and state AGI are not interchangeable.
- Some methods require confirmed state facts or explicit projection assumptions. An unavailable component is not zero tax.
Limitations
- The estimate excludes unmodeled income, adjustments, local taxes and special filing situations. Utah's indexed-credit assumptions remain provisional while final 2026 instructions are pending.
- Annual liability differs from withholding and paycheck take-home. Confirm the current official forms and source versions for a complete return.
Sources
- State Tax Rates, Federation of Tax Administrators
- State Individual Income Tax Rates and Brackets, Tax Foundation
- State Government Resources, Internal Revenue Service
Professional guidance: This page is for state-tax education only and is not tax, legal, financial, or investment advice. State tax decisions and multi-state filing should be reviewed with a CPA or enrolled agent licensed in the relevant states.