Bonus Tax Calculator – California
California adds a 10.23% state supplemental tax on top of the federal 22%. Plus SDI at 1.1%. See your exact California bonus take-home below.
✓ Federal 22% + CA 10.23% included
✓ FICA + SDI calculated
✓ Total effective rate: ~39.9%
Bonus pay tax calculator · Percentage method
Gross bonus
$5,000.00
Federal withholding (22%)
−$1,100.00
State withholding (6.60%)
−$330.00
Social Security (6.2%)
−$310.00
Medicare (1.45%)
−$72.50
Total withholding
−$1,812.50
36.25% effective
Net bonus (take-home)
$3,187.50
California Bonus Tax Breakdown
California has one of the highest total bonus withholding rates in the nation. Here's the complete breakdown:
| Tax | Rate | On $10,000 Bonus |
|---|---|---|
| Federal income tax | 22% | $2,200 |
| CA state income tax | 10.23% | $1,023 |
| Social Security | 6.2% | $620 |
| Medicare | 1.45% | $145 |
| CA SDI | 1.1% | $110 |
| Total withholding | ~40.98% | $4,098 |
| Take-home | ~59.02% | $5,902 |
Why California Takes More
California's 10.23% supplemental wage rate is the highest flat state rate in the country. Combined with SDI (which most states don't have), California workers see roughly 10–12% more withheld from bonuses than workers in no-income-tax states like Texas or Florida.
High Earners: Additional Taxes
If your total income exceeds $200,000, you'll also owe the 0.9% Additional Medicare Tax and California's Mental Health Services Tax (1% on income over $1 million). These push the effective rate even higher for large bonuses.