How much is the quarterly tax for freelancers in Connecticut?

Freelancers in Connecticut pay federal self-employment tax (15.3% on net self-employment income), federal income tax based on their bracket, and 6.99% Connecticut state income tax. Use the calculator above to get your specific estimate.

When are quarterly taxes due in Connecticut?

Connecticut generally follows the federal quarterly estimated tax schedule: April 15, June 17, September 16, and January 15 of the following year.

State Tax: 6.99%

Connecticut Quarterly Tax Calculator 2026

Connecticut has a top income tax rate of 6.99%. Freelancers must make quarterly estimated payments if annual liability exceeds $1,000.

Quick Answer

Freelancers in Connecticut pay federal self-employment tax (15.3% on net income), federal income tax, and 6.99% Connecticut state income tax. Use the calculator below to estimate your quarterly payment.

Your Information

Annual Freelance Income

Business Expenses

Other Income (W-2, etc.)

Filing Status

State

Payment Quarter

Tax Information Notice

This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.

Tax Information Notice