All states

Montana

Progressive brackets
Filing status
Income
Pre-tax adjustments
Itemized deductions
Household

Estimated taxes

Tax year 2025
Gross income$0
Total tax$0
Take-home pay$0

Overall effective rate: 0.0%

Federal

Adjusted gross income
$0
Standard deduction
$15,000
Taxable income
$0
Tax before credits
$0
Credits
- $0
Federal income tax
$0
Effective / marginal rate
0.0% / 0.0%

FICA

Social Security
$0
Medicare
$0
FICA total
$0

State — Montana (MT)

State taxable income
$0
State income tax
$0
State + local tax
$0
Effective / marginal rate
0.0% / 0.0%

Notes

  • Montana's 2021 tax-simplification reform (Senate Bill 399), effective for tax years beginning 2024, collapsed the old seven-bracket schedule into TWO brackets: 4.7% and 5.9% on ordinary income for 2025.
  • The 5.9% rate begins above an inflation-indexed threshold that varies by filing status: $21,100 (single / married filing separately), $42,200 (married filing jointly), $31,700 (head of household) for 2025.
  • The deduction for FEDERAL INCOME TAX PAID is REPEALED. Montana formerly let itemizers deduct up to $5,000 ($10,000 joint) of federal income tax; SB 399 removed it and it is not modelled.
  • The tax base is FEDERAL TAXABLE INCOME (without the federal QBI deduction), not AGI. Montana adopts the federal standard or itemized deduction and no longer has its own standard deduction or personal exemptions.
  • Not modelled: Montana's preferential net long-term capital-gains rates (3.0% / 4.1% instead of 4.7% / 5.9%). The shared input does not separate long-term capital gains from ordinary income, so all income is taxed at the ordinary rates (a conservative estimate for filers with such gains).

Sources

Disclaimer: This is an informational estimate for the 2025 tax year only and is provided on a best-effort basis. It is not tax, legal, investment, or financial advice. Results are approximate, may be inaccurate or out of date, and may not reflect all credits, deductions, phase-outs, or local rules. This site assumes no liability for any decisions made or outcomes resulting from its use. Consult a qualified tax professional before filing or making any decisions.