Oklahoma state income tax calculator

Estimate Oklahoma income tax using the 0.25% to 4.75% bracket schedule.

How this calculator works

Step 1 starts with the Oklahoma taxable income you already calculated on your return. If you are a part-year resident or nonresident, the tool applies the Oklahoma income percentage you provide to focus on Oklahoma-source income.

Step 2 applies Oklahoma's six-tier bracket schedule to estimate total tax.

Step 3 summarizes the effective and marginal rates so you can see how additional income would be taxed and whether your current estimate matches your expectations.

Frequently asked questions

What income should I enter?

Use Oklahoma taxable income from your return. If you only know total income, estimate deductions first or use the standard deduction tool.

Do part-year residents prorate income?

Yes. Use the Oklahoma income allocation percentage from your return to prorate taxable income before applying the Oklahoma bracket schedule.

Does Oklahoma use brackets?

Yes. Oklahoma uses a six-tier schedule with rates from 0.25% up to 4.75%, and thresholds vary by filing status.

Is this tax advice?

No. This tool provides estimates based on the inputs you provide and is not legal or tax advice.

This tool provides estimates based on Oklahoma's published brackets. Not legal or tax advice.