Updated for tax year 2025.
If you live or work in Oklahoma, you’ll likely need to file an Oklahoma state income tax return along with your federal return. Oklahoma uses a progressive tax system, so your filing status and taxable income determine how much state tax you owe.
This guide explains Oklahoma’s 2025 income tax rates and brackets, standard deduction, exemptions and credits, and updates for the current tax year. When you’re ready to file, TaxAct® automatically applies Oklahoma’s tax rules to help you accurately prepare your Oklahoma return alongside your federal return.
What is the Oklahoma state income tax?
Oklahoma state income tax is a tax on income earned by individuals. It is collected by the Oklahoma Tax Commission and helps fund state services.
For tax year 2025, Oklahoma uses a six-bracket progressive tax structure with rates from 0.25% to 4.75%, depending on filing status and taxable income.
Oklahoma income tax rates and tax brackets
Like federal taxes, Oklahoma income tax brackets are progressive. The 2025 Oklahoma brackets are:
| Tax Rate | Single / Married Filing Separately | Married Filing Jointly / Head of Household |
|---|---|---|
| 0.25% | Up to $1,000 | Up to $2,000 |
| 0.75% | $1,001-$2,500 | $2,001-$5,000 |
| 1.75% | $2,501-$3,750 | $5,001-$7,500 |
| 2.75% | $3,751-$4,900 | $7,501-$9,800 |
| 3.75% | $4,901-$7,200 | $9,801-$14,400 |
| 4.75% | Over $7,200 | Over $14,400 |
If you need more information on how federal tax brackets work, you can use our tax bracket calculator for federal taxes. See Oklahoma Form 511 instructions for official bracket and tax-table calculations.
Oklahoma standard deduction
If you claim the standard deduction on your federal return, you must claim the Oklahoma standard deduction on your Oklahoma return. For tax year 2025, Oklahoma standard deduction amounts are:
- $6,350 for single and married filing separately
- $12,700 for married filing jointly and qualifying surviving spouse
- $9,350 for head of household
If you itemized on your federal return, you must itemize on Oklahoma as well. Oklahoma itemized deductions are generally limited to $17,000, with charitable contributions and medical expenses excluded from that cap.
Oklahoma exemptions and credits
Oklahoma allows exemptions and credits that can reduce your state tax bill. Common examples include:
- Personal exemptions of $1,000 for each exemption claimed on Form 511
- Credits for taxes paid to another state for qualifying income taxed by both Oklahoma and another state
- Sales Tax Relief Credit for eligible taxpayers
- Additional state credits listed on Form 511 credits schedules
Eligibility rules vary by credit and filing status. Review Form 511 instructions and supporting schedules for current requirements.
Oklahoma tax changes for 2025
For 2025, Oklahoma’s resident packet adds an exemption related to paid leave provided by employers to employees volunteering as Oklahoma poll workers. Oklahoma’s top individual income tax rate remains 4.75% for 2025.
The return due date is generally April 15, 2026, with an April 20, 2026 due date for electronically filed returns under Oklahoma guidance.
FAQs
The bottom line
Oklahoma’s 2025 income tax uses a progressive structure with a top rate of 4.75%. Understanding your bracket, deduction method, and exemptions can help you better estimate your Oklahoma tax bill or refund.
When you’re ready to file, TaxAct can help you prepare your federal and Oklahoma returns in one place so you can file with confidence.
Already filed your taxes and waiting for your refund? Learn more about where your Oklahoma state tax refund is.
This article is for informational purposes only and not legal or financial advice.
All TaxAct offers, products and services are subject to applicable terms and conditions.
The OBBB is now also being referred to by lawmakers as the Working Families Tax Cut Act. You may see one or both names used here, but they refer to the same set of tax changes.
Citations
Oklahoma Tax Commission. “2025 Oklahoma Resident Individual Income Tax Forms and Instructions (Form 511 Packet).” Accessed 19 Aug. 2026.
Oklahoma Tax Commission. “Individual Income Tax.” Accessed 19 Aug. 2026.
Oklahoma Tax Commission. “OkTAP.” Accessed 19 Aug. 2026.