Connecticut paycheck withholding calculator
Estimate how your paycheck withholding compares with a simplified annual Connecticut income tax estimate. Enter your yearly wages and the state tax amounts from your paystub. Review the assumptions before changing payroll settings.
Connecticut tax snapshot: Connecticut taxes wages with 5 graduated brackets ranging from 3% to 6.99%. The Connecticut standard deduction in this estimate is $16,400 for single filers — confirm the current-year figure in state instructions. To change Connecticut withholding, file Connecticut Form CT-W4 with your employer.
Check your Connecticut paycheck withholding
Enter your yearly wages and the state tax amounts from your paystub. This is a planning estimate, not your final state tax bill.
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Connecticut income tax brackets (2026)
| Taxable income | Rate |
|---|---|
| $0 to $10,000 | 3% |
| $10,000 to $50,000 | 5% |
| $50,000 to $100,000 | 5.5% |
| $100,000 to $200,000 | 6% |
| $200,000 and over | 6.99% |
Standard deduction $16,400 (single). Filing status, deductions, credits, and local taxes can change your actual withholding.
How to adjust Connecticut withholding
File Connecticut Form CT-W4 with your employer to change Connecticut paycheck withholding. Confirm you have the current-year version, enter only the lines your situation requires, and check your next paystub's state-tax line to verify the change took effect within one or two pay periods.
What is the Connecticut state income tax rate?
Connecticut uses graduated brackets from 3% to a top rate of 6.99%. This is a planning estimate — check current state instructions for your filing status and year.
What form changes Connecticut withholding?
Connecticut Form CT-W4. Ask HR for the current-year version; payroll generally applies the change within one or two pay periods.