1Oklahoma
Lowest21.6%
Overall effective tax rate
- Net
- Federal
- State
- FICA
- Federal income tax
- $7,670
- State income tax
- $2,830
- Payroll tax (FICA)
- $5,738
- Total tax
- $16,237
- Net income (annual)
- $58,763
Tax year 2026 · state vs state
Montana vs Oklahoma Income Tax Comparison (2026)
On a $75,000 salary (single filer, 2026), you pay $47 less state income tax a year in Oklahoma than in Montana, which is about $4 a month. At $150,000 the gap is $910 in favor of Oklahoma.
Montana: up to 5.65%Oklahoma: up to 4.5%Updated October 10, 2026
Compare Montana and Oklahoma for your income
Estimate for education only, not tax advice. 2026 federal and state rules, standard deductions, no local taxes. How we calculate.
State comparison
Comparing 2 states, sorted by lowest overall tax rate.
2Montana
21.7%
Overall effective tax rate
- Net
- Federal
- State
- FICA
- Federal income tax
- $7,670
- State income tax
- $2,877
- Payroll tax (FICA)
- $5,738
- Total tax
- $16,284
- Net income (annual)
- $58,716
Advanced analysis (optional)
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💰 Monthly breakdown
Your take-home pay, spread across the year
Oklahoma
Monthly gross$6,250
Monthly tax$1,353
Monthly take-home$4,897
Montana
Monthly gross$6,250
Monthly tax$1,357
Monthly take-home$4,893
Estimates use 2026 federal and state rates, the standard deduction for your filing status and no local taxes. Rankings use state income tax only.
Montana vs Oklahoma: how the two systems differ
| Montana | Oklahoma | |
|---|---|---|
| Wage income tax | Progressive, 2 brackets | Progressive, 3 brackets |
| Top rate | 5.65% | 4.5% |
| Lowest rate | 4.7% | 2.5% |
| Deductions and credits (single) | $16,100 standard deduction | $6,350 standard deduction, $1,000 personal exemption |
State income tax and take-home pay at every salary
The same salary can leave you with different take-home pay depending on the state. This table applies each state’s 2026 rules to a single filer with no pre-tax contributions.
| Income | MT state tax | OK state tax | Difference | MT take-home | OK take-home |
|---|---|---|---|---|---|
| $30,000 | $653 | $805 | $151 less in Montana | $25,632 | $25,481 |
| $40,000 | $1,123 | $1,255 | $131 less in Montana | $33,197 | $33,066 |
| $50,000 | $1,593 | $1,705 | $111 less in Montana | $40,762 | $40,651 |
| $60,000 | $2,063 | $2,155 | $91 less in Montana | $48,327 | $48,236 |
| $75,000 | $2,877 | $2,830 | $47 less in Oklahoma | $58,716 | $58,763 |
| $100,000 | $4,289 | $3,955 | $335 less in Oklahoma | $74,891 | $75,226 |
| $150,000 | $7,114 | $6,205 | $910 less in Oklahoma | $106,677 | $107,587 |
| $250,000 | $12,764 | $10,705 | $2,060 less in Oklahoma | $170,418 | $172,478 |
Single filer, 2026, federal standard deduction. Take-home is after federal, state and payroll tax. No local taxes.
Married filing jointly
| Income | MT state tax | OK state tax | Difference | MT take-home | OK take-home |
|---|---|---|---|---|---|
| $75,000 | $2,012 | $2,284 | $272 less in Montana | $62,611 | $62,339 |
| $100,000 | $3,187 | $3,409 | $222 less in Montana | $81,523 | $81,301 |
| $150,000 | $5,753 | $5,659 | $94 less in Oklahoma | $117,432 | $117,526 |
| $250,000 | $11,403 | $10,159 | $1,244 less in Oklahoma | $186,065 | $187,309 |
Married filing jointly, 2026, federal standard deduction. Uses each state's joint brackets where they differ.
Does the lower-tax state change as income rises?
For a single filer, Montana and Oklahoma charge the same state income tax (nothing) up to roughly $12,500 of income. Above that, Montana is the lower-tax state. The order flips again near $72,500, so the better state depends on where your income falls.
Rates side by side
Montana (single filers)
| 4.7% | Up to $47,500 |
| 5.65% | Over $47,500 |
Oklahoma (single filers)
| 2.5% | $3,751 to $4,900 |
| 3.5% | $4,901 to $7,200 |
| 4.5% | Over $7,200 |
Full details for each state: Montana income tax calculator and Oklahoma income tax calculator. Federal rates are on the 2026 federal tax brackets page.
Montana vs Oklahoma FAQ
Which has lower income tax, Montana or Oklahoma?+
Oklahoma is lower at $75,000: $2,830 of state income tax versus $2,877 in Montana. At $150,000 it is $7,114 in Montana and $6,205 in Oklahoma. For a single filer, Montana and Oklahoma charge the same state income tax (nothing) up to roughly $12,500 of income. Above that, Montana is the lower-tax state. The order flips again near $72,500, so the better state depends on where your income falls.
How much more do I keep on $100,000 in Montana versus Oklahoma?+
A single filer keeping $74,891 a year in Montana would keep $75,226 in Oklahoma after federal, state and payroll tax. The difference is $335 a year, or $28 a month.
How do the Montana and Oklahoma income tax systems differ?+
Montana uses progressive rates up to 5.65%; Oklahoma uses progressive rates up to 4.5%. State deductions and exemptions also differ, which changes how much income is taxed.
Are local taxes included in this Montana vs Oklahoma comparison?+
No. It covers federal income tax, Social Security, Medicare and state income tax only. City, county, sales and property taxes are not included, and they can change the real cost of living in each state.
Should I move from Montana to Oklahoma to save on taxes?+
State income tax is one cost among many. Property and sales taxes, housing, insurance and wages also differ, and you may owe tax to both states in the year you move. Use this comparison as one input and confirm details with a tax professional.
Sources
- Tax Foundation: 2026 state individual income tax rates and brackets
- IRS: Tax inflation adjustments for tax year 2026
Last checked October 10, 2026. Confirm with your state tax agency before filing.
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Estimates for education only, not tax, legal or financial advice. Not a substitute for a tax professional or your state revenue department.