Oklahoma Tax Calculator
The Oklahoma (OK) Tax Calculator is updated for the 2026/27 tax year. It estimates Oklahoma state income tax, federal income tax, and FICA/Medicare contributions, providing an accurate picture of your net take-home pay. Oklahoma applies a progressive income tax based on taxable income, with several deductions and credits that can significantly lower your tax bill.
This calculator helps you model both resident and nonresident filings, including popular state-specific adjustments such as the Child Tax Credit, Retirement Income Exclusion, and Credit for Taxes Paid to Another State.
Quick Access Tools
Quick Oklahoma Tax Calculator
Enter income and filing status, then click Calculate for an instant estimate. Expand tabs to include deductions, dependents, retirement savings, and withholdings for a full federal and Oklahoma tax projection.
Input key: F Used in Federal tax calculations S Used in State tax calculations
How to Calculate Income Tax in Oklahoma for 2026/27
- Enter your annual income and optional deductions.
- Choose your filing status — single, married, or head of household.
- Click Calculate to view estimated state and federal taxes, credits, and take-home pay.
Advanced Options
- Add dependents and family credits to reflect child and household adjustments.
- Model IRA or 401(k) contributions to reduce taxable income.
- Include state withholdings and estimated payments for refund forecasting.
- Apply credits like the Oklahoma Earned Income Credit or the Credit for Taxes Paid to Another State.
Related Calculators
Additional Resources
Frequently Asked Questions
Answers to common Oklahoma tax questions, including filing rules for residents and nonresidents, credit eligibility, and popular deductions.
I moved mid-year and changed jobs—what about withholding?
Use Form OK-W-4 for the new job, and consider a small extra withholding to avoid a year-end balance due. In our tool, split income across months/states to approximate your final OK liability on Form 511NR.
Does OK tax military pay?
Active-duty military pay may have specific exclusions; review Form 511/511NR instructions for eligibility.
How do I see month-to-month paycheck variation?
Use the monthly table; we default to a 1/12 split—day-based payrolls (28–31 days) can cause small swings.
Where do I find other useful calculators?
See the Calculator Hub—try Compound Interest, CAGR, T-Bill, and Bond Yield.
How are stock options taxed for OK?
Generally follows federal wage inclusion timing (e.g., NSOs at exercise); include on OK return as income.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.