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Montana Income Tax Calculator 2026

Calculate your Montana state income tax, federal tax, FICA, and take-home pay for 2026. Free — no signup required.

Annual Income

$

Filing Status

Take-Home Pay

$57,585

$4,799/mo

Total Taxes

$17,415

23.22% effective

Montana State Tax

$3,564

5.90% marginal

Tax Type	Amount	Rate
Federal Income Tax	$8,114	22.00% marginal
Montana State Tax	$3,564	5.90% marginal
Social Security (OASDI)	$4,650	6.2%
Medicare	$1,088	1.45%
Total Tax	$17,415	23.22%

Take-Home Pay by Period

Annual	$57,585
Monthly	$4,799
Bi-Weekly	$2,215
Weekly	$1,107

Montana Tax Brackets 2026

Montana uses a flat tax rate of 5.90% on all taxable income.

Montana Deductions & Exemptions

Type	Single	Married Filing Jointly
Standard Deduction	$14,600	$29,200

Montana Tax Facts

•Montana moved to a flat 5.9% rate for 2024+
•Previously had graduated rates up to 6.75%

Frequently Asked Questions

Does Montana have a state income tax?

Yes, Montana has a state income tax. It uses a flat rate of 5.90%.

What is the Montana income tax rate for 2026?

Montana has a flat income tax rate of 5.90% for 2026.

What is the standard deduction in Montana?

The Montana standard deduction is $14,600 for single filers and $29,200 for married filing jointly.

Compare with Neighboring States

North Dakota

Flat 1.95%

South Dakota

No income tax

Wyoming

No income tax

Idaho

Flat 5.80%

Tax rates are approximate for 2025/2026 and may not reflect recent legislative changes. This calculator is for informational purposes only — consult a tax professional for advice. Part of BriskTool's free calculator tools.