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As of Oct 29, 2026

Montana income tax calculator

Estimate your 2026 Montana and federal income tax and whether you will get a refund. A single filer earning $75,000 owes about $2,877 in Montana income tax and $7,676 in federal income tax.

By John Crane, MBA & the Editorial Team · Updated for the 2026 tax year. How we check our numbers

A You
Filing status

You, and your spouse if filing jointly

State
B Income
$

W-2 box 1, after pre-tax 401(k) and benefits

$

Taxable interest, short-term gains, other ordinary income

$

W-2 box 12; already left out of wages. A few states tax it.

$
$
$
$

Deductible IRA, HSA, student loan interest

C New 2026 deductions
$
$

Only the extra half of time-and-a-half pay

$

US-assembled new vehicle, loan after 2024

$

Market price minus strike, times shares, for incentive stock options exercised and held past year end. It counts only for the alternative minimum tax. Stock option calculator

D Itemized deductions
$
$

Or sales tax, if larger

$

Federal cap: $40,400 for both combined

$
$

Only the part over 7.5% of AGI counts

$
E Family

Children who lived with you over half the year

Children under 13, or a dependent or spouse unable to care for themselves

$

Day care, after-school care, day camp. Up to $3,000 for one person, $6,000 for two or more

F Tax already paid
$

W-2 box 2 (the paycheck calculator shows a yearly total)

$
$

Estimated federal amount owed

$876.00

Federal tax $9,876 · Montana owed $3,442

Federal tax$9,87611.6%
Montana and local tax$3,4424.0%
Income after these taxes$71,68284.3%
Adjusted gross income
$85,000
Taxable income
$68,900
Deduction used
Standard $16,100
Federal bracket
22%
Effective federal rate
11.6%
MT tax after credits
$3,442

Where your federal tax comes from

Ordinary income by bracket
  • 10% bracket on $12,400$1,240
  • 12% bracket on $38,000$4,560
  • 22% bracket on $18,500$4,070

Federal return summary

Form 1040, 2026
LineAmount
Total income$85,000.00
Adjustments-$0.00
Adjusted gross income$85,000.00
Standard deduction-$16,100.00
Taxable income$68,900.00
Income tax$9,876.00
Total federal tax$9,876.00
Withholding and estimated payments$9,000.00
Federal amount owed$876.00

Montana return

2026 rules
LineAmount
State taxable income$68,900.00
Tax before credits$3,441.60
State tax after credits$3,441.60
State withheld$0.00
State amount owed$3,441.60
  • 2026 brackets and EITC are final; the 65+ subtraction uses the 2025 amount until the 2026 figure is published.

Income tax in Montana

  • Montana taxes ordinary income at 4.7% up to $47,500 ($95,000 joint, $71,250 head of household) and 5.65% above that in 2026, with rates of 3.0% and 4.1% for net long-term capital gains.
  • It starts from federal taxable income, so the federal standard or itemized deduction is already built in, and there is no separate personal exemption.
  • Social Security is taxed to the extent it is federally taxable, while filers 65 or older get a separate subtraction.
  • The Montana earned income credit doubles to 20% of the federal credit for 2026 and is refundable.

2026 income tax at common incomes (wages only, standard deduction)

IncomeFederal tax, singleMontana tax, singleMontana rate, singleMontana tax, married
$40,000$2,623$1,1232.8%$367
$60,000$5,023$2,0633.4%$1,307
$75,000$7,676$2,8773.8%$2,012
$100,000$13,176$4,2894.3%$3,187
$150,000$24,734$7,1144.7%$5,753

Rates

Top rate 5.65%. At $75,000 of wages, each extra $1,000 adds about $57 of Montana tax.

Family example

A married couple earning $60,000 with two children and $4,000 of child care: Montana tax of $1,307 before credits, credits of Montana EITC ($248), for $1,058 owed.

Local income tax

None figured on the Montana return.

Examples assume wages only, the standard deduction and no other income. See what comes out of each check in the Montana paycheck calculator.

More for Montana: Montana paycheck calculator · Montana mortgage calculator · Montana home affordability calculator

Income tax calculators for other states

How this is calculated

Federal return

The 2026 Form 1040: standard or itemized deduction, the new Schedule 1-A deductions, tax rates, child tax credit, child and dependent care credit and EITC.

Montana

Montana's 2026 resident return: its starting point, Social Security and retirement adjustments, deductions, exemptions, rates and main credits.

Sources

Official Montana tax guidance (3 sources), checked for 2026. 2026 brackets and EITC are final; the 65+ subtraction uses the 2025 amount until the 2026 figure is published.

Sources

  1. IRS Revenue Procedure 2025-32: 2026 tax brackets, standard deduction and other inflation adjustments
  2. IRS Form 1040 instructions
  3. IRS Form 6251, Alternative Minimum Tax
  4. State revenue departments, via the Federation of Tax Administrators

Related guides

Questions

How much Montana income tax do I pay on $75,000?

About $2,877 for a single filer with only wage income and the standard deduction (3.8% of income), or $2,012 for a married couple filing jointly on the same income. Federal income tax on $75,000 for a single filer is about $7,676.

What is Montana's top income tax rate in 2026?

5.65% on the highest incomes. At $75,000 of wages, each extra $1,000 adds about $57 of Montana tax.

Does Montana tax Social Security and retirement income?

Partly. A single retiree aged 67 with $30,000 of Social Security and $30,000 of pension or IRA withdrawals owes about $660 in Montana income tax in 2026. Exclusions depend on age, income and the type of retirement income.