Oklahoma Bonus Tax Calculator (2026)
Oklahoma withholds 4.5% state income tax on bonuses, on top of the federal 22% and 7.65% FICA.
Oklahoma rules for bonuses
Optional flat supplemental rate. Published rates: 4.5% for supplemental wages paid separately or specified (highest rate in 68 O.S. 2355(B)(1)).
- Only if tax was withheld from regular wages; otherwise aggregate
- 4.5% = top bracket of the 2026 OW-2 formula (0% / 2.5% / 3.5% / 4.5%); statute not fetched
If tax was withheld from an employee's regular wages, use one of these two methods: (A) Withhold at the highest applicable rate set out in 68 O.S. Section 2355(B)(1)... for the taxable year (OAC 710:90-1-6)
Local taxes: None
Take-home bonus by amount
| Bonus | Federal (22%) | FICA | State | Take-home |
|---|---|---|---|---|
| $1,000 | $220 | $77 | $45 | $659 |
| $2,500 | $550 | $191 | $113 | $1,646 |
| $5,000 | $1,100 | $383 | $225 | $3,293 |
| $10,000 | $2,200 | $765 | $450 | $6,585 |
| $20,000 | $4,400 | $1,530 | $900 | $13,170 |
| $50,000 | $11,000 | $3,825 | $2,250 | $32,925 |
Sources
Frequently asked questions
What is the bonus tax rate in Oklahoma?
Oklahoma withholds 4.5% on bonuses when the employer chooses the flat supplemental rate, on top of the federal 22% and 7.65% FICA.
How much of a $10,000 bonus do I keep in Oklahoma?
About $6,585 for a single filer earning $85,000: $2,200 federal, $765 Social Security and Medicare and $450 state.
Will I get some of the bonus tax back?
Possibly. The 22% federal rate is only withholding. At tax time your bonus is taxed at your bracket (22% at this salary), and Oklahoma's flat supplemental rate can also differ from your actual state rate.