Montana Income Tax Calculator
Calculate your Montana state income tax alongside federal tax. See the full bracket breakdown, effective rate, and combined tax liability.
Last updated: · Tax Foundation (2025 state brackets) + IRS Rev. Proc. 2025-32 (2026 federal)
On a $75,000 salary in Montana (single filer, 2025), your estimated state income tax is $3,317.60 (4.4% effective rate). Combined with federal tax of $7,670.00, your total income tax is $10,987.60 (14.7% combined effective rate). Montana has progressive brackets with a top rate of 5.90%. Source: Tax Foundation, state revenue department.
Montana Deduction: $14,600.00
Standard deduction: $14,600.00
Simplified to 2 brackets in 2024. Top rate of 5.9% reduced from previous 6.75%. No sales tax.
Federal estimates use 2026 IRS brackets. State estimates use 2025 state rate data.
Results
Montana Tax Bracket Breakdown
| Rate | Range | Tax |
|---|---|---|
| 4.70% | $0 – $20,500 | $963.50 |
| 5.90% | $20,500 – ∞ | $2,354.10 |
| Total Montana Tax | $3,317.60 | |
Compare Montana with Other States
How This Is Calculated
Montana uses a progressive income tax system. Each bracket's rate applies only to income within that range.
| Rate | Income Range (Single) |
|---|---|
| 4.70% | $0 – $20,500 |
| 5.90% | $20,500 – No limit |
Data source
State bracket data from the Tax Foundation (2025 State Individual Income Tax Rates and Brackets). Cross-referenced with the Montana revenue department. Federal brackets from IRS Rev. Proc. 2025-32 (2026).
Frequently Asked Questions
- How much is Montana income tax on $75,000?
- On a $75,000 salary in Montana, you would owe approximately $3,317.60 in state income tax (4.4% effective rate) plus $7,670.00 in federal income tax, for a combined total of $10,987.60 (14.7% combined effective rate).
- What is the Montana income tax rate for 2025?
- Montana uses a progressive income tax system with rates ranging from 4.70% to 5.90%. Simplified to 2 brackets in 2024. Top rate of 5.9% reduced from previous 6.75%. No sales tax.