Connecticut Paycheck Calculator

How the Connecticut estimate works

Enter gross pay for one pay period, federal W-4 adjustments, and the state details shown above. Federal withholding follows Publication 15-T. Connecticut annualizes the paycheck, applies the Circular CT personal exemption for the selected CT-W4 code, calculates initial tax, adds the 2% phaseout and high-income recapture amounts, applies the personal tax credit, and returns the result to the pay period before CT-W4 Lines 2 and 3. CT Paid Leave is a separate 0.5% employee contribution through the 2026 Social Security wage base.

Example: At $1,000 of weekly wages and CT-W4 Code A, the complete Circular CT calculation produces $40.24 of Connecticut income-tax withholding. With no prior covered wages from the employer, the separate CT Paid Leave contribution is $5.00. The calculator does not assume any unentered benefit deduction or invent a tax result.

Weekly, biweekly, semimonthly, and monthly are the supported paycheck frequencies. “Annual salary” is an earnings input and the annual view is a simple period multiplication; neither is an annual payroll-period method. The special Form W-4 adjustment for nonresident aliens is not modeled.

Is Connecticut withholding a flat tax rate? No. Circular CT applies a code-specific personal exemption, progressive tax table, 2% add-back, high-income recapture, and personal tax credit before converting the result to one paycheck. CT Paid Leave is calculated separately, and a valid CT-W4 Code E income-tax exemption does not by itself remove that employee contribution.