Oklahoma Earned Income Tax Credit Calculator
Figure basis: Official Oklahoma Tax CommissionThe Oklahoma earned income tax credit (EITC) is a state credit for working people with low to moderate income, set as 5% of your federal EITC. This calculator estimates your federal EITC from your earned income, filing status, and number of qualifying children using the IRS 2026 tables, then applies the Oklahoma rule to give your state credit. The Oklahoma credit is refundable. Enter your details to see both your estimated federal EITC and your Oklahoma credit. Figures are an estimate: the IRS computes the federal credit from $50 income bands, so your exact credit may differ by a few dollars. The state percentage is sourced from Oklahoma Tax Commission and verified for 2026.
A single filer in Oklahoma with 2 children earning $25,000 has an estimated federal EITC of $7,082.23 and a Oklahoma credit of $354.11 (5% of the federal credit).
How the Oklahoma EITC works
The Oklahoma credit is built on the federal EITC. First the federal credit is found from your earned income, filing status, and qualifying children (it phases in, plateaus at a maximum, then phases out as income rises). Then Oklahoma applies 5% of your federal EITC. The Oklahoma credit is refundable, so if it is larger than the state tax you owe, you receive the difference as a refund.
federal EITC = phase-in, plateau, then phase-out per the IRS 2026 tables
Oklahoma EITC = federal EITC x Oklahoma percentage
Editor's insight: a small rate, but Oklahoma actually pays it out
Oklahoma's earned income credit is just 5% of the federal EITC, one of the lowest headline rates among states that offer the credit at all. The detail that matters more than the rate is that the credit is refundable again. Oklahoma made the credit non-refundable in 2016 as a budget measure, which quietly stripped value from the lowest earners who owed no state tax. Refundability was restored in 2022, so today the full 5% is paid out even when it is larger than what you owe.
One Oklahoma quirk to watch is that the state computes its credit from your federal EITC, and the current computation lives in the Form 511 packet. A single filer with 2 children earning $25,000 sits near the two-child maximum federal credit, so Oklahoma's 5% share lands in the low hundreds of dollars: modest, but money the state genuinely sends rather than a paper offset.
If you file in a neighboring state in some years, the contrast is stark. Kansas pays 17% and Colorado pays 50%, while Texas and Arkansas offer no state EITC at all. Oklahoma sits at the low end on rate but, crucially, in the refundable column, which is where the credit does the most for the households it targets. Enter your own income and family size above to see both the federal and Oklahoma figures together.
Oklahoma EITC: frequently asked questions
How much is the Oklahoma earned income tax credit?
The Oklahoma EITC is 5% of your federal EITC. For example, a single filer with 2 children earning $25,000 has an estimated federal EITC of $7,082.23 and a Oklahoma credit of about $354.11. Enter your own details above for your figure.
Is the Oklahoma EITC refundable?
The Oklahoma credit is refundable, so if it is larger than the state tax you owe, you receive the difference as a refund.
Do I qualify for the Oklahoma earned income credit?
Generally, if you qualify for the federal EITC you also qualify for the Oklahoma credit, which is based on it. You need earned income, a valid Social Security number, and investment income under the federal limit ($12,200 for 2026).
How is the Oklahoma EITC calculated?
First your federal EITC is computed from your earned income, filing status, and number of qualifying children using the IRS 2026 tables. Then Oklahoma applies 5% of your federal EITC. This calculator does both steps for you.
Official sources
- Oklahoma EITC percentage and refundability: Oklahoma Tax Commission, as at Jul 15, 2026.
- Federal EITC 2026 parameters: IRS Rev. Proc. 2025-32, Internal Revenue Service.
Reviewed by the CalculatorHub team, edited by James Graham, 15 July 2026. See our methodology. General information, not tax advice; your exact credit is set on your tax return.