Connecticut Bonus Tax Calculator 2025
Calculate your after-tax bonus with detailed CT state and federal tax breakdown
New CT Bonus Tax Calculator – Understand why bonuses are taxed at supplemental rates
Connecticut Bonus Tax Calculator
Tax Breakdown Results
Your Take-Home Bonus
$3,000
Federal Taxes
$1,100
22%
CT State Tax
$315
6.3%
FICA Taxes
$382.50
7.65%
Total Tax Rate
40%
Supplemental Rate
Visual Tax Breakdown
Why is Bonus Taxed at 40%?
Supplemental Withholding Method
- Federal supplemental rate: 22% (for bonuses up to $1M)
- Connecticut state tax: ~6.3% (varies by income)
- FICA taxes: 7.65% (Social Security + Medicare)
- Additional Medicare: 0.9% (for high earners)
Important Notes
This is withholding, not your final tax rate! When you file your tax return, the actual tax owed may be different based on your total annual income.
The 40% rate is a conservative withholding approach to ensure adequate tax coverage.
Common Bonus Amounts – After Tax in Connecticut
| Bonus Amount | Federal Tax (22%) | CT State Tax (6.3%) | FICA (7.65%) | Take-Home Amount |
|---|
How Much Are Bonuses Taxed in CT?
Connecticut State Tax
- • Rate: 3% – 6.99%
- • Progressive tax system
- • Based on total income
- • Bonus treated as supplemental income
Federal Tax
- • Supplemental rate: 22%
- • Applies to bonuses up to $1M
- • Higher rate (37%) for larger bonuses
- • Subject to reconciliation at tax time
Payroll Taxes
- • Social Security: 6.2%
- • Medicare: 1.45%
- • Additional Medicare: 0.9% (high earners)
- • No Connecticut disability tax
Frequently Asked Questions
Why does my $5,000 bonus after tax seem so low?
Your $5,000 bonus is subject to supplemental withholding rates totaling approximately 40% in Connecticut. This includes 22% federal, 6.3% state, and 7.65% FICA taxes, leaving you with about $3,000 take-home.
Is the 40% tax rate permanent?
No, this is withholding, not your final tax rate. When you file your tax return, you may get a refund if too much was withheld based on your actual tax bracket.
Can I change how my bonus is taxed?
You can request your employer use the aggregate method, but most use supplemental withholding for simplicity. The final tax owed is the same regardless of withholding method.
Are bonuses taxed differently than regular income?
For tax purposes, bonuses are taxed the same as regular income. However, the withholding method differs, often resulting in higher upfront withholding.
Tax Planning Tips for Connecticut Residents
Maximize Retirement Contributions
Consider increasing 401(k) contributions to reduce taxable income
Time Your Bonus
Consider timing bonuses across tax years for optimal tax planning
Track Withholdings
Monitor total tax withholdings to avoid under/overpayment
Consult a Professional
Work with a CT tax professional for complex situations
Connecticut Bonus Tax Calculator 2025 – Calculate your after-tax bonus accurately
This calculator provides estimates based on current tax rates. Consult a tax professional for personalized advice.