State Reference · Tax Year 2026
Oklahoma (OK)
Graduated up to 4.75%
Oklahoma Tax Commission · Main form: Form 511 · Due April 15, 2027
Rates & brackets
Top rate4.75% >$7,200 single / >$12,200 MFJ
Standard deduction$6,350 single / $12,700 MFJ
Filing logistics
Main formForm 511
Filing dueApril 15, 2027
E-file portalOkTAP
AgencyOklahoma Tax Commission
Major credits
- OK EITC (5% federal, refundable)
- Sales tax relief credit
- Child care credit
Sales & property tax
Sales tax4.5% state + local; groceries exempted 2024+
Property taxLocally assessed; senior valuation limitation available
Preparer notes
- Sales Tax Relief credit ($40/person) — refundable, income-limited, easy to miss.
- Retirement income exclusion up to $10,000.
Related deduction & credit lessons
Deepen state-specific credit hunting with these lessons.