Oklahoma Income Tax Rates, Brackets, and Calculator for 2026
Oklahoma has four income tax brackets with income tax rates from 0% to 4.5% for 2026. Compare OK state tax at $75,000, $100,000, and other income levels. See how filing status changes the results and where Oklahoma ranks among states.
Oklahoma has four individual income tax brackets with rates of 0%, 2.5%, 3.5%, and 4.5% for 2026. Its progressive system applies each rate only to the portion of taxable income within that bracket. The same rates apply across filing statuses, but the taxable-income thresholds vary by status. The calculator and tables below compare Oklahoma taxes across income levels, filing statuses, and states, with examples showing how deductions, exemptions, and the 0% bracket affect the results.
The Oklahoma Legislature establishes the income tax rules, while the Oklahoma Tax Commission administers them and publishes the tax forms and instructions. House Bill 2764 introduced the four-bracket schedule for 2026 and reduced the top rate from 4.75% to 4.5%. The Commission's published guidance and enacted legislation provide the 2026 rates and brackets we use in our calculations. For calendar-year filers, federal Form 1040 series returns and Oklahoma Form 511 tax returns for income earned in 2026 are generally due April 15, 2027.
Tax Calculator
Oklahoma Income Tax Calculator for 2026
Enter annual household income and select a filing status to estimate Oklahoma income tax for 2026. Results open in our All 50 States income tax calculator with Oklahoma highlighted. The table below shows Oklahoma income tax for a Single filer earning $50,000 to $150,000 annually. Notice how the effective rate rises across this range even though every example reaches the same 4.5% marginal tax bracket.
How Much Will You Pay in Oklahoma?
| Household Income | State Tax | Marginal Rate | Effective Rate | State Rank |
|---|---|---|---|---|
| $50,000 | $1,705 | 4.5% | 3.41% | 36 |
| $75,000 | $2,830 | 4.5% | 3.77% | 31 |
| $100,000 | $3,955 | 4.5% | 3.95% | 27 |
| $125,000 | $5,080 | 4.5% | 4.06% | 29 |
| $150,000 | $6,205 | 4.5% | 4.14% | 29 |
Oklahoma ranks in the high income tax range nationally at $50,000 and in the moderate range at the higher incomes shown, with rankings from 27th to 36th across these examples. At $100,000 of annual income, a Single filer pays an estimated $3,955 in Oklahoma state income tax for 2026. The marginal tax rate reached is 4.5%, while the effective tax rate is 3.95%. The standard deduction, personal exemption, and income taxed in lower brackets keep the effective rate below the top bracket rate.
The ranked estimates assume full-year Oklahoma residency, Single filing status, wages only, no dependents, and a taxpayer under age 65 who is not blind or claimed as another taxpayer's dependent. They include the $6,350 Oklahoma standard deduction and $1,000 personal exemption. Oklahoma does not adjust these amounts annually for inflation. No other deductions, income adjustments, or tax credits are included. Federal, payroll, and local taxes are excluded. The step-by-step examples further down the page explain how Oklahoma income tax is calculated for Single and Married Filing Jointly households.
Tax Rates
Oklahoma Income Tax Rates
Oklahoma's four individual income tax rates are 0%, 2.5%, 3.5%, and 4.5% for 2026. The same rates apply to Single, Married Filing Jointly, Married Filing Separately, and Head of Household, but the income thresholds differ. Single and Married Filing Separately use the same thresholds, while Married Filing Jointly and Head of Household thresholds are twice the Single amounts. Each rate applies only to the portion of taxable income within that bracket.
2026 Oklahoma Income Tax Brackets
| Bracket | Rate | Single | Married Filing Jointly | Married Filing Separately | Head of Household |
|---|---|---|---|---|---|
| 1 | 0% | $0 - $3,750 | $0 - $7,500 | $0 - $3,750 | $0 - $7,500 |
| 2 | 2.5% | $3,751 - $4,900 | $7,501 - $9,800 | $3,751 - $4,900 | $7,501 - $9,800 |
| 3 | 3.5% | $4,901 - $7,200 | $9,801 - $14,400 | $4,901 - $7,200 | $9,801 - $14,400 |
| 4 | 4.5% | $7,201+ | $14,401+ | $7,201+ | $14,401+ |
Oklahoma reduced its top income tax rate from 4.75% to 4.5% for 2026. The remaining positive rates also fell by 0.25 percentage points. House Bill 2764 replaced the previous six-rate schedule with the four brackets shown in the table above. The new 0% bracket leaves the first $3,750 of taxable income untaxed for Single and Married Filing Separately taxpayers, or $7,500 for joint filers and Head of Household taxpayers.
Oklahoma does not adjust its bracket thresholds annually for inflation. Further rate reductions are planned but depend on the revenue conditions and certifications required by state law. Current law provides a path to eliminating the individual income tax through successive reductions of 0.25 percentage points. There is no fixed date for reaching 0%.
Compare States
Compare Oklahoma to Other States
The next table compares Oklahoma with its six bordering states, plus Louisiana as a regional comparison, at $75,000 of annual income for a Single filer. States appear from lowest to highest state income tax, with the difference measured against Oklahoma. The marginal rate identifies the tax bracket reached, while the effective rate is state income tax divided by $75,000 of household income, expressed as a percentage. Notice that a lower marginal tax rate does not always mean a lower state tax bill.
Oklahoma vs Other States at $75,000 of Income (2026)
| State Name | State Tax | Difference | Marginal Rate | Effective Rate | State Rank |
|---|---|---|---|---|---|
| Texas | $0 | −$2,830 | 0% | 0.00% | 1 |
| Louisiana | $1,864 | −$966 | 3% | 2.49% | 13 |
| Arkansas | $2,287 | −$542 | 3.7% | 3.05% | 18 |
| New Mexico | $2,359 | −$470 | 4.7% | 3.15% | 20 |
| Missouri | $2,534 | −$296 | 4.7% | 3.38% | 25 |
| Colorado | $2,592 | −$238 | 4.4% | 3.46% | 27 |
| Oklahoma | $2,830 | $0 | 4.5% | 3.77% | 31 |
| Kansas | $3,385 | +$556 | 5.58% | 4.51% | 41 |
Six of the seven comparison states have lower estimated state income tax than Oklahoma at this income level. Oklahoma's $2,830 tax is about $238 higher than Colorado's and $556 lower than Kansas's. Oklahoma is also about $542 higher than Arkansas and $296 higher than Missouri, even though Missouri's marginal rate is higher. Texas has no state income tax.
Examples
Oklahoma Income Tax Calculation Examples
The goal of these examples is to compare Single and Married Filing Jointly statuses at the same $75,000 annual income per person. The Single example uses $75,000 of household income, while the Married Filing Jointly example assumes each spouse earns $75,000, for a combined $150,000. The results match our 2026 income tax calculator using these income amounts and the corresponding filing status.
To simplify the calculations, both examples assume full-year Oklahoma residency, W-2 wages only, no dependents, and taxpayers under age 65 who are not blind or claimed as dependents. In the comparison table, we first reduce household income by the Oklahoma standard deduction and personal exemptions to calculate taxable income. We then apply the state brackets to calculate Oklahoma state income tax. No other state deductions, income adjustments, or tax credits are included.
2026 Oklahoma Filing Status Comparison
| Tax Metric | Single | Married Filing Jointly |
|---|---|---|
| Household Income | $75,000 | $150,000 |
| Standard Deduction | $6,350 | $12,700 |
| Personal Exemptions | $1,000 | $2,000 |
| Taxable Income | $67,650 | $135,300 |
| State Income Tax | $2,830 | $5,659 |
| Effective Tax Rate | 3.77% | 3.77% |
| Marginal Tax Rate | 4.5% | 4.5% |
Looking at the table above, we can see that both households reach Oklahoma's 4.5% bracket and have the same 3.77% effective tax rate. The joint standard deduction, personal exemptions, and bracket thresholds are twice the Single amounts in these examples. The couple's $5,659 tax equals the combined tax of two single filers who each owe $2,829.50, with no marriage penalty in this comparison. Doubling the table's rounded Single tax produces a $1 difference. Next, we will review the step-by-step calculations for each filing status.
Step-by-Step Example 1: Single
For a single filer with $75,000 of household income, the 2026 Oklahoma standard deduction is $6,350 and the personal exemption is $1,000. Subtracting both leaves $67,650 of Oklahoma taxable income. That income fills the first three brackets, with the remaining amount taxed at 4.5% in the fourth bracket.
- Oklahoma taxable income: Subtract the state standard deduction and personal exemption from household income. $75,000 − $6,350 − $1,000 = $67,650
- Tax through the first three brackets: Apply each rate to the income within that bracket. $3,750 × 0% = $0.00 $1,150 × 2.5% = $28.75 $2,300 × 3.5% = $80.50 Then add the results. $0.00 + $28.75 + $80.50 = $109.25
- Tax on the fourth bracket: Subtract $7,200 from $67,650, leaving $60,450 taxed at 4.5%. $60,450 × 0.045 = $2,720.25
- Estimated Oklahoma income tax: Add the tax from the lower brackets and the fourth bracket. $109.25 + $2,720.25 = $2,829.50
To calculate the Oklahoma effective tax rate, we divide $2,829.50 of state income tax by $75,000 of household income. The result is 3.77%, rounded. The estimated state income tax rounds to $2,830 in the comparison table.
The Oklahoma marginal tax rate is 4.5%, the rate applied to the next dollar of Oklahoma taxable income. The deductions, personal exemption, and lower brackets keep the effective rate below that marginal rate.
Step-by-Step Example 2: Married Filing Jointly
Now let's apply the calculation to a married couple filing jointly. Each spouse earns $75,000, for a combined household income of $150,000. The 2026 Oklahoma joint standard deduction is $12,700, and the two personal exemptions total $2,000. Subtracting these amounts leaves $135,300 of Oklahoma taxable income. The joint brackets are twice as wide, with the first $7,500 taxed at 0% and the amount above $14,400 taxed at 4.5%.
- Oklahoma taxable income: Subtract the joint standard deduction and personal exemptions for both spouses from household income. $150,000 − $12,700 − $2,000 = $135,300
- Tax through the first three brackets: Apply each rate to the income within the corresponding joint bracket. $7,500 × 0% = $0.00 $2,300 × 2.5% = $57.50 $4,600 × 3.5% = $161.00 Then add the results. $0.00 + $57.50 + $161.00 = $218.50
- Tax on the fourth bracket: Subtract $14,400 from $135,300, leaving $120,900 taxed at 4.5%. $120,900 × 0.045 = $5,440.50
- Estimated Oklahoma income tax: Add the tax from the lower brackets and the fourth bracket. $218.50 + $5,440.50 = $5,659.00
To calculate the Oklahoma effective tax rate, we divide $5,659 of state income tax by $150,000 of household income. The result is 3.77%, rounded, the same as the Single example. Both income and tax are twice the Single amounts before rounding, leaving the same share of household income paid in state tax.
The Oklahoma marginal tax rate is 4.5%, also the same as the Single example. Although the joint brackets are twice as wide, the couple's taxable income is also doubled, so both examples reach the same bracket.
Takeaway
Oklahoma Income Tax Takeaways
Effective rate is lower than the bracket rate
Our Single example at $75,000 produces an estimated $2,830 in Oklahoma income tax, while the Married Filing Jointly example at $150,000 produces $5,659. Both have a 3.77% effective tax rate, below the 4.5% marginal rate. The standard deduction, personal exemptions, and lower brackets reduce the share of household income paid in state tax.
The examples show no marriage penalty
The married couple's $5,659 tax equals the combined tax of two single filers who each owe $2,829.50. Joint bracket thresholds, the standard deduction, and personal exemptions all double in this comparison, matching the doubling of household income. The apparent $1 difference from doubling the table's Single tax is due to rounding.
The 0% bracket applies after deductions
Oklahoma's 0% bracket leaves the first $3,750 of Single taxable income or $7,500 of joint taxable income untaxed. These amounts apply after the standard deduction and personal exemptions reduce household income. The 0% bracket therefore provides an additional untaxed portion of income rather than replacing those deductions. Income above that bracket is taxed at the applicable higher rates.
Oklahoma falls near the middle at higher incomes
For Single filers, Oklahoma's national rank moves from 36th at $50,000 to 31st at $75,000 and 27th at $100,000, then 29th at both $125,000 and $150,000, with 1 representing the lowest effective rate. Its effective rate rises from 3.41% to 4.14% across this range, even as its national position moves closer to the middle. At $75,000, Oklahoma has higher estimated state income tax than six of the seven comparison states. Its state income tax is about $542 more than Arkansas's and $556 less than Kansas's.
FAQ
Frequently Asked Questions
What is the Oklahoma income tax rate for 2026?
Oklahoma has four individual income tax rates for 2026: 0%, 2.5%, 3.5%, and 4.5%. Each rate applies only to the portion of taxable income within its bracket. The taxable-income thresholds depend on whether the taxpayer uses the Single and Married Filing Separately schedule or the wider Married Filing Jointly, Head of Household, and Qualifying Surviving Spouse schedule.
How much is Oklahoma income tax on $75,000?
A Single filer earning $75,000 in wages owes an estimated $2,830 in Oklahoma state income tax for 2026. The $6,350 standard deduction and $1,000 personal exemption leave $67,650 of taxable income. The effective tax rate is 3.77%, and the marginal tax rate is 4.5%.
How much is Oklahoma income tax on $100,000?
A Single filer earning $100,000 in wages owes an estimated $3,955 in Oklahoma state income tax for 2026. The $6,350 standard deduction and $1,000 personal exemption leave $92,650 of taxable income. The effective tax rate is 3.95%, while the marginal tax rate remains 4.5%.
What is the Oklahoma marginal tax rate?
Your marginal tax rate is the rate applied to the next dollar of Oklahoma taxable income. For 2026, the top rate is 4.5% on taxable income above $7,200 for Single and Married Filing Separately, or $14,400 for Married Filing Jointly, Head of Household, and Qualifying Surviving Spouse. Both filing-status examples on this page reach the 4.5% bracket.
What is the Oklahoma effective tax rate?
The effective tax rate is Oklahoma state income tax divided by household income, expressed as a percentage. In our examples, a Single filer earning $75,000 and a married couple earning $150,000 both have an effective rate of 3.77%. The standard deduction, personal exemptions, and lower brackets keep that rate below the 4.5% marginal rate.
Does Oklahoma have a marriage penalty?
No, not in our comparison of a married couple earning $75,000 each with two Single filers earning the same amounts. The couple owes $5,659, equal to the combined tax of two Single filers who each owe $2,829.50 before rounding. The joint bracket thresholds, standard deduction, and personal exemptions all double in these examples. Other income splits, deductions, and credits can change the result.
How much is the Oklahoma standard deduction for 2026?
Oklahoma's standard deduction is $6,350 for Single and Married Filing Separately, $9,350 for Head of Household, and $12,700 for Married Filing Jointly and Qualifying Surviving Spouse. Oklahoma does not adjust these amounts annually for inflation.
You must follow your federal choice of standard or itemized deductions. If you itemize, Schedule 511-D adjusts your federal Schedule A deductions, excluding state and local income or sales taxes. Oklahoma caps the remaining itemized deductions at $17,000, except qualifying medical expenses and charitable contributions.
How much is the Oklahoma personal exemption for 2026?
Oklahoma allows a $1,000 personal exemption per taxpayer, or $2,000 for a married couple filing jointly. It reduces taxable income rather than tax owed. You cannot claim your own exemption if someone else can claim you as a dependent, but you may still claim the standard deduction. Additional exemptions may apply for blindness or qualifying taxpayers age 65 or older.
Does Oklahoma allow a dependent exemption?
Yes, Oklahoma allows a $1,000 deduction for each qualifying dependent. This reduces taxable income rather than providing a $1,000 tax credit.
How much is the Oklahoma Earned Income Credit?
Oklahoma's refundable Earned Income Credit is 5% of the federal credit calculated under the federal rules in effect for 2020. Use Form 511-EIC and Schedule 511-G to calculate it, including any required proration for out-of-state income. The amount may differ from 5% of your current federal credit. Federal filers with qualifying children also use Schedule EIC.
How much is the Oklahoma Child Care or Child Tax Credit?
Oklahoma allows the greater of 20% of the federal child and dependent care credit or 5% of the federal child tax credit, including the Additional Child Tax Credit. Federal adjusted gross income must be $100,000 or less. The Oklahoma credit is nonrefundable and may require proration for out-of-state income. Federal child tax credits are calculated using Schedule 8812.
References:
- Summary of 2025 Tax Legislation (PDF). Oklahoma Tax Commission. Summarizes HB 2764, including the four income tax brackets effective for 2026 and the conditions for future rate reductions. Retrieved October 22, 2026.
- Enrolled House Bill 2764 (PDF). Oklahoma Legislature, 2025 session. Establishes the 2026 rates and filing-status thresholds, along with revenue conditions and certification requirements for successive 0.25-percentage-point reductions to 0%. Retrieved October 22, 2026.
- 2025 Form 511 Oklahoma Resident Income Tax Packet (PDF). Oklahoma Tax Commission. Provides the standard deduction and exemption amounts used in the examples, itemized deduction rules, and the Child Care or Child Tax Credit and Earned Income Credit instructions. These are the published 2025 annual instructions. The 2026 bracket calculations use HB 2764 rather than this packet's 2025 tax tables. Retrieved October 22, 2026.
- 2017 Session Overview (PDF). Oklahoma Senate. Historical reference for HB 2348, which separated Oklahoma's standard deduction from the federal deduction. Retrieved October 22, 2026.
- Oklahoma Income Tax Exemptions. Oklahoma Tax Commission. Explains the $1,000 personal and dependent exemptions and additional exemptions for blindness and qualifying taxpayers age 65 or older. Retrieved October 22, 2026.
- 2025 Form 511-EIC Earned Income Credit Worksheet (PDF). Oklahoma Tax Commission. Explains the use of federal 2020 rules to calculate Oklahoma's Earned Income Credit and its refundable status beginning in 2022. Used with Schedule 511-G in the published 2025 packet. Retrieved October 22, 2026.