Oklahoma Tax Tables for 2018
The 2018 Oklahoma Tax Tables summarise the state-level rules applied to wages, deductions, credits and taxable income. These tables match the rules used by the Oklahoma State Tax Calculator 2018.
On This Page
Quick Access Tools
Oklahoma Tax Tables for 2018
The tables below outline the income tax structure, deduction amounts, state-level credits and payroll-related rules used for Oklahoma in 2018. Oklahoma uses filing-status–specific progressive income tax tables. Income is divided into brackets and each portion is taxed at its marginal rate. The table below shows the full structure for this filing status. For a full explanation of marginal brackets, see our Tax Tables guide.
Single – Progressive Tax Brackets (2018)
Marginal income tax brackets for Single filers in Oklahoma for 2018. Only the portion of income within each bracket is taxed at the stated rate.
| Bracket | Range | Rate |
|---|---|---|
| 1 | $ 0.00 to $ 1,000.00 | 0.5% |
| 2 | $ 1,000.00 to $ 2,500.00 | 1% |
| 3 | $ 2,500.00 to $ 3,750.00 | 2% |
| 4 | $ 3,750.00 to $ 4,900.00 | 3% |
| 5 | $ 4,900.00 to $ 7,200.00 | 4% |
| 6 | $ 7,200.00 and over | 5% |
Married filing jointly – Progressive Tax Brackets (2018)
Marginal income tax brackets for Married filing jointly filers in Oklahoma for 2018. Only the portion of income within each bracket is taxed at the stated rate.
| Bracket | Range | Rate |
|---|---|---|
| 1 | $ 0.00 to $ 2,000.00 | 0.5% |
| 2 | $ 2,000.00 to $ 5,000.00 | 1% |
| 3 | $ 5,000.00 to $ 7,500.00 | 2% |
| 4 | $ 7,500.00 to $ 9,800.00 | 3% |
| 5 | $ 9,800.00 to $ 12,200.00 | 4% |
| 6 | $ 12,200.00 and over | 5% |
Married filing separately – Progressive Tax Brackets (2018)
Marginal income tax brackets for Married filing separately filers in Oklahoma for 2018. Only the portion of income within each bracket is taxed at the stated rate.
| Bracket | Range | Rate |
|---|---|---|
| 1 | $ 0.00 to $ 1,000.00 | 0.5% |
| 2 | $ 1,000.00 to $ 2,500.00 | 1% |
| 3 | $ 2,500.00 to $ 3,750.00 | 2% |
| 4 | $ 3,750.00 to $ 4,900.00 | 3% |
| 5 | $ 4,900.00 to $ 7,200.00 | 4% |
| 6 | $ 7,200.00 and over | 5% |
Head of household – Progressive Tax Brackets (2018)
Marginal income tax brackets for Head of household filers in Oklahoma for 2018. Only the portion of income within each bracket is taxed at the stated rate.
| Bracket | Range | Rate |
|---|---|---|
| 1 | $ 0.00 to $ 2,000.00 | 0.5% |
| 2 | $ 2,000.00 to $ 5,000.00 | 1% |
| 3 | $ 5,000.00 to $ 7,500.00 | 2% |
| 4 | $ 7,500.00 to $ 9,800.00 | 3% |
| 5 | $ 9,800.00 to $ 12,200.00 | 4% |
| 6 | $ 12,200.00 and over | 5% |
Widowed – Progressive Tax Brackets (2018)
Marginal income tax brackets for Widowed filers in Oklahoma for 2018. Only the portion of income within each bracket is taxed at the stated rate.
| Bracket | Range | Rate |
|---|---|---|
| 1 | $ 0.00 to $ 2,000.00 | 0.5% |
| 2 | $ 2,000.00 to $ 5,000.00 | 1% |
| 3 | $ 5,000.00 to $ 7,500.00 | 2% |
| 4 | $ 7,500.00 to $ 9,800.00 | 3% |
| 5 | $ 9,800.00 to $ 12,200.00 | 4% |
| 6 | $ 12,200.00 and over | 5% |
Oklahoma Standard Deduction(2018)
State-level standard deduction amounts for each filing status.
| Filing Status | Amount |
|---|---|
| Single | $6,350 |
| Married filing jointly | $12,700 |
| Married filing separately | $6,350 |
| Head of household | $6,350 |
| Widowed | $12,700 |
Oklahoma Payroll Taxes(2018)
Payroll taxes set at the state level, separate from federal FICA.
| Tax | Rate | Wage Cap |
|---|---|---|
| Unemployment Insurance Tax | 0% | No cap |
Oklahoma Tax Tables for Related Years
These related years are often reviewed together for comparing bracket changes, deductions and Oklahoma updates:
Frequently Asked Questions
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.