Oklahoma Bonus Tax Calculator 2026
Oklahoma publishes no flat bonus rate, so the bonus is added to regular pay and run through the 2026 OW-2 formula — usually 4.5% on the bonus.
Bonus check calculator
No flat rate in Packet OW-2
The Oklahoma Tax Commission's 2026 Oklahoma Income Tax Withholding Tables (Packet OW-2, effective January 1, 2026) describe two ways to compute withholding — the percentage formula and the wage-bracket tables — and no separate rate for supplemental wages. This calculator therefore follows the federal aggregate approach with Oklahoma's own tables: the bonus is added to the regular paycheck and the extra Oklahoma tax is withheld from it. For the standard example that is $225.00.
How the formula works
Each allowance claimed on the employee's withholding certificate is worth Oklahoma's $1,000 personal exemption, divided across the pay periods. Above the allowance amount, the annual single table withholds nothing up to $10,100, then 2.5%, 3.5% and 4.5% above $13,550; married brackets are twice as wide. Nearly every salaried employee is in the 4.5% band, so the bonus adds 4.5% of itself. A married employee claiming two allowances sees $225.00; a part-time worker on $500 every two weeks, $224.79.
| Rule | No flat rate: bonus added to regular pay under the OW-2 formula |
|---|---|
| Valid through | December 31, 2026 |
| Documents | 2026 Oklahoma Income Tax Withholding Tables (Packet OW-2) (Effective January 1, 2026 (Revised 11-2025)) |
| Agency | Oklahoma Tax Commission |
| Federal income tax | −$1,100.00 |
| Social Security | −$310.00 |
| Medicare | −$72.50 |
| Oklahoma income tax | −$225.00 |
| Net | $3,292.50 |