Oklahoma state taxes at a glance
| Individual income tax | Graduated (bracket) income tax |
|---|---|
| Rate structure | Three brackets for 2026 after a 2025 law collapsed six brackets into three: 0% on the first $3,750 (single), then 2.5%, 3.5%, with a top rate of 4.5% above $7,200. Verify current-year figures. |
| Tax agency | Oklahoma Tax Commission (OTC) |
| Main individual return | Form 511 (residents); Form 511-NR (nonresidents and part-year residents) |
| Local income taxes | No local income taxes. |
| Sales tax | A 4.5% state rate plus city and county rates; Tax Foundation shows a combined average of about 9.1%, among the highest in the nation. |
| Property tax | Assessed by county assessors and levied locally. Oklahoma limits annual increases in the assessed value of homesteads; the homestead exemption is applied for through the county assessor. |
| Retirement & Social Security | Oklahoma does not tax Social Security benefits. Other retirement income is partially excluded up to a dollar limit; confirm current limits with the OTC. |
Verify current-year figures: state rates, brackets, credits and filing rules change. Treat this page as a starting orientation and confirm details on the Oklahoma Tax Commission (OTC) website.
How Oklahoma income tax works
Oklahoma’s 2025 House Bill 2764 collapsed the state’s six individual income tax brackets into three and reduced the top marginal rate from 4.75% to 4.5%, effective January 1, 2026, according to Tax Foundation. The Oklahoma Tax Commission’s 2026 materials show a 0% rate on the first $3,750 of taxable income for single filers, 2.5% from $3,751 to $4,900, 3.5% from $4,901 to $7,200, and 4.5% above $7,200; joint, head-of-household and surviving-spouse filers have doubled thresholds. Brackets are not indexed to inflation.
The same law established a trigger that could phase the income tax down further, in 0.25-percentage-point steps, when specified revenue conditions are met. Because such triggers depend on state revenue, treat any future-year rate as provisional and check the Tax Commission’s forms. Oklahoma’s standard deduction is set by the state (Tax Foundation lists $6,350 single for 2026), and it has personal and dependent exemptions of $1,000 each, so the state return differs from the federal one. Oklahoma does not tax Social Security benefits.
Sales tax is Oklahoma’s heavier burden. The 4.5% state rate looks moderate, but local rates push the combined average to about 9.1% in Tax Foundation’s mid-2026 data, ranking sixth nationally, with a maximum local rate near 7%. Because the combined rate depends on the city and county, check the rate for your address. For broader context on how states mix their taxes, see states without income tax.
Filing your Oklahoma return and free options
The Oklahoma Tax Commission says Form 511 can be filed free online through OkTAP (the Oklahoma Taxpayer Access Point), which also handles payments and account services. The Commission also supports e-filing through approved software, and free federal-and-state options may be available through providers depending on income.
See our free filing hub for the federal return and VITA for in-person help. If you cannot pay in full, see what to do if you can’t pay, and use state refund status for tracking.
For the federal side, see our guides to free federal filing options and the complete guide to filing taxes.
Things Oklahoma residents often ask about
- Three brackets: 2.5%, 3.5% and 4.5%, with a zero rate on the first slice of income.
- Phase-down trigger: law allows future 0.25-point reductions if revenue conditions are met.
- High combined sales tax: local rates can push combined rates well above the 4.5% state rate.
- OkTAP is free: file Form 511 online through the Tax Commission’s portal.
- Homestead exemption: applied for through your county assessor, not the OTC.
Official Oklahoma links
- Oklahoma Tax Commission
- Oklahoma Tax Commission: file taxes
- Federation of Tax Administrators: State tax agencies
Frequently asked questions
What are Oklahoma’s income tax rates?
Three brackets for 2026 with a top rate of 4.5% above $7,200 for single filers, after a 2025 law reduced the top rate from 4.75% and consolidated six brackets into three.
Can I file Oklahoma taxes for free?
Yes. The Tax Commission says Form 511 can be filed free online through OkTAP.
Does Oklahoma tax Social Security?
No. Oklahoma does not tax Social Security benefits.
General information only — not tax, legal or financial advice. Tax figures change every year; verify the current numbers at IRS.gov or with a qualified professional. Read the full disclaimer.