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
Illinois vs Oklahoma Income Tax Comparison (2026)
On a $75,000 salary (single filer, 2026), you pay $738 less state income tax a year in Oklahoma than in Illinois, which is about $62 a month. At $150,000 the gap is $1,076 in favor of Oklahoma.
Illinois: 4.95% flatOklahoma: up to 4.5%Updated October 10, 2026
Compare Illinois 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.
2Illinois
22.6%
Overall effective tax rate
- Net
- Federal
- State
- FICA
- Federal income tax
- $7,670
- State income tax
- $3,568
- Payroll tax (FICA)
- $5,738
- Total tax
- $16,975
- Net income (annual)
- $58,025
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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
Illinois
Monthly gross$6,250
Monthly tax$1,415
Monthly take-home$4,835
Estimates use 2026 federal and state rates, the standard deduction for your filing status and no local taxes. Rankings use state income tax only.
Illinois vs Oklahoma: how the two systems differ
| Illinois | Oklahoma | |
|---|---|---|
| Wage income tax | Flat 4.95% | Progressive, 3 brackets |
| Top rate | 4.95% | 4.5% |
| Lowest rate | 4.95% | 2.5% |
| Deductions and credits (single) | $2,925 personal exemption | $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 | IL state tax | OK state tax | Difference | IL take-home | OK take-home |
|---|---|---|---|---|---|
| $30,000 | $1,340 | $805 | $536 less in Oklahoma | $24,945 | $25,481 |
| $40,000 | $1,835 | $1,255 | $581 less in Oklahoma | $32,485 | $33,066 |
| $50,000 | $2,330 | $1,705 | $626 less in Oklahoma | $40,025 | $40,651 |
| $60,000 | $2,825 | $2,155 | $671 less in Oklahoma | $47,565 | $48,236 |
| $75,000 | $3,568 | $2,830 | $738 less in Oklahoma | $58,025 | $58,763 |
| $100,000 | $4,805 | $3,955 | $851 less in Oklahoma | $74,375 | $75,226 |
| $150,000 | $7,280 | $6,205 | $1,076 less in Oklahoma | $106,511 | $107,587 |
| $250,000 | $12,230 | $10,705 | $1,526 less in Oklahoma | $170,952 | $172,478 |
Single filer, 2026, federal standard deduction. Take-home is after federal, state and payroll tax. No local taxes.
Married filing jointly
| Income | IL state tax | OK state tax | Difference | IL take-home | OK take-home |
|---|---|---|---|---|---|
| $75,000 | $3,423 | $2,284 | $1,139 less in Oklahoma | $61,200 | $62,339 |
| $100,000 | $4,660 | $3,409 | $1,251 less in Oklahoma | $80,050 | $81,301 |
| $150,000 | $7,135 | $5,659 | $1,476 less in Oklahoma | $116,050 | $117,526 |
| $250,000 | $12,085 | $10,159 | $1,926 less in Oklahoma | $185,383 | $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?
Across every income from $10,000 to $1,000,000 that we tested, Oklahoma charges the same or less state income tax than Illinois for a single filer, so there is no income level where the ranking flips.
Rates side by side
Illinois (single filers)
| 4.95% | Over $0 |
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: Illinois income tax calculator and Oklahoma income tax calculator. Federal rates are on the 2026 federal tax brackets page.
Illinois vs Oklahoma FAQ
Which has lower income tax, Illinois or Oklahoma?+
Oklahoma is lower at $75,000: $2,830 of state income tax versus $3,568 in Illinois. At $150,000 it is $7,280 in Illinois and $6,205 in Oklahoma. Across every income from $10,000 to $1,000,000 that we tested, Oklahoma charges the same or less state income tax than Illinois for a single filer, so there is no income level where the ranking flips.
How much more do I keep on $100,000 in Illinois versus Oklahoma?+
A single filer keeping $74,375 a year in Illinois would keep $75,226 in Oklahoma after federal, state and payroll tax. The difference is $851 a year, or $71 a month.
How do the Illinois and Oklahoma income tax systems differ?+
Illinois uses a flat 4.95% rate; 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 Illinois 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 Illinois 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.