Montana Income Tax Calculator 2026

Calculate your Montana state income tax for 2026. Montana uses a progressive tax system with rates up to 5.65%.

By Konstantin Iakovlev · Updated October 19, 2026 · Methodology

$
Deduction

Federal Income Tax

$7,670.00

Effective Tax Rate

10.23%

Marginal Tax Rate

22%

FICA (SS + Medicare)

$5,737.50

Total Tax Burden

$16,284.10

After-Tax Income

$58,715.90

Tax Calculation Breakdown

Gross Income$75,000.00
Above-the-Line Deductions- $0.00
Adjusted Gross Income (AGI)$75,000.00
Standard Deduction- $16,100.00
Taxable Income$58,900.00
10% on $0.00 – $12,400.00$1,240.00
12% on $12,400.00 – $50,400.00$4,560.00
22% on $50,400.00 – $105,700.00$1,870.00
Federal Income Tax (before credits)$7,670.00
Federal Income Tax (after credits)$7,670.00
Social Security (6.2%)$4,650.00
Medicare (1.45%)$1,087.50
Total FICA$5,737.50
Montana Taxable Income$58,900.00
Montana Income Tax$2,876.60
Total Tax$16,284.10
After-Tax Annual Income$58,715.90
Monthly Take-Home$4,892.99

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

Montana Income Tax Overview

Montana levies its own income tax on top of what the IRS collects, and it's structured as a progressive system rather than a flat rate. Income is taxed in tiers, with the marginal rate climbing as earnings rise and peaking at 5.65% on the highest band. Before any rate applies, Montana lets single filers subtract a standard deduction of $16,100, which shields the first slice of income from state tax entirely and pushes the effective rate below the headline ceiling for most households.

Nearly everyone who earns wages, self-employment income, or other taxable income while living in Montana owes this tax, and part-year and nonresidents owe it on income sourced to the state. The Montana Department of Revenue administers filing, which generally tracks your federal return as a starting point. Because the state tax sits alongside federal income tax, your total income-tax bite is the sum of the two, though the state portion is the smaller piece for the vast majority of filers.

Montana Income Tax Brackets 2026 (Single Filer)

Taxable Income Rate
$0 – $47,500 4.7%
Over $47,500 5.65%

Montana Tax Snapshot

State Sales Tax 0.00%
Avg. Property Tax 0.59%
Minimum Wage $10.85/hr

Official Sources:

Montana Income Tax FAQ

What is Montana's top income tax rate for 2026?
Montana's income tax is progressive and tops out at 5.65%. That top rate applies only to the highest band of taxable income, so it's a marginal rate, not the rate you pay on every dollar. Lower portions of your income are taxed at lower rates beneath that ceiling.
Who has to pay Montana state income tax?
Montana residents owe state income tax on essentially all of their taxable income, while part-year residents and nonresidents owe it on income earned from Montana sources. Filing is handled through the Montana Department of Revenue and generally begins with figures from your federal return, so most people who file a federal return and have Montana income also file a state return.
How does the standard deduction work in Montana?
Montana offers a standard deduction that reduces the income subject to state tax. For single filers it's $16,100, meaning that amount of income is sheltered before any rate applies. Because of this deduction and the graduated brackets, a filer's effective state rate is typically well under the 5.65% top rate.
Does Montana income tax stack on top of federal tax?
Yes. The state tax is entirely separate from federal income tax, so your total income-tax obligation is the federal amount plus the Montana amount. For most filers the federal portion is far larger, with the Montana share capped by the 5.65% top rate and reduced further by the standard deduction.

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