Oklahoma Income Tax Calculator 2026
Calculate your combined federal and Oklahoma state income tax for 2026. See your federal brackets, Oklahoma tax, effective rate, and take-home pay — all calculated privately in your browser.
Oklahoma Income Tax: Graduated Brackets Up to 4.75%
Oklahoma uses a progressive income tax system with 6 brackets. Rates range from 0.25% to 4.75%, with higher income taxed at higher rates. Oklahoma also levies a use tax on purchases made from out-of-state retailers.
Like federal taxes, Oklahoma's system is marginal — only the income within each bracket is taxed at that bracket's rate. Combined with federal taxes (10%–37%), Oklahoma residents can face a total marginal rate of up to 41.75% on their highest dollars of income.
Oklahoma Tax Brackets for 2026 (Single Filer)
The Oklahoma income tax brackets for single filers are:
- 0.25% on income from $0 to $1,000
- 0.75% on income from $1,000 to $2,500
- 1.75% on income from $2,500 to $3,750
- 2.75% on income from $3,750 to $4,900
- 3.75% on income from $4,900 to $7,200
- 4.75% on income over $7,200
Your marginal rate is the rate on your last dollar of income. Your effective rate (total tax divided by total income) is always lower because of the progressive structure.
Tips to Lower Your Oklahoma Tax
Maximize pre-tax retirement contributions to reduce both federal and Oklahoma taxable income. The 2026 401(k) limit is $24,500 ($32,500 with catch-up for age 50+). If Oklahoma conforms to federal deductions, your standard deduction and itemized expenses also reduce your state tax liability.