Self-Employed Tax Calculator 2026 — Connecticut
Self-employed workers in Connecticut owe federal self-employment tax at 15.3% plus Connecticut state income tax — use this calculator to see your exact total Connecticut tax bill, the deductions available to reduce it, and the quarterly estimated payments required to stay current with both the IRS and the Connecticut tax authority.
Also see: Connecticut Quarterly Tax Calculator →
Business Income
Total revenue before any deductions
Equipment, software, office supplies, subscriptions, etc.
Location & Filing
After-Tax Income
$56,025
Total tax burden: $18,975 — 25.3% effective rate
Tax Breakdown
Your Deductions
Estimated tax savings from deductions: $2,188
2026 Quarterly Estimated Payments
Q1 (Jan–Mar)
$4,744
Due April 15, 2026
Q2 (Apr–May)
$4,744
Due June 16, 2026
Q3 (Jun–Aug)
$4,744
Due September 15, 2026
Q4 (Sep–Dec)
$4,744
Due January 15, 2027
Set aside $1,581/month to be ready for each payment.
$11,925 taxable in this bracket
$36,550 taxable in this bracket
$480 taxable in this bracket
Frequently Asked Questions
Do I need to pay both federal and state SE taxes?
Self-employment tax (SE tax) is a federal tax — there is no state-level self-employment tax. However, most states tax your self-employment income as ordinary income under their regular income tax. Nine states have no income tax at all. The total tax burden shown in this calculator includes both federal SE tax and your state's income tax on self-employment income.
Do state deductions work the same as federal?
Many states follow federal treatment for common deductions like business expenses and SE tax deductions, but not all. Some states don't allow the home office deduction, and state retirement contribution limits or health insurance deduction rules may differ from federal. This calculator applies federal deduction rules, which are a good approximation for most states — consult a local tax professional for state-specific deduction limits.
Connecticut Taxes — Frequently Asked Questions
Does Connecticut have state income tax in 2026?
Yes. Connecticut uses progressive state income tax brackets. On a $80,000 salary (single filer) the state tax comes to $3,950 for 2026, with a marginal state rate of 5.5% — on top of $8,972 federal income tax and $6,120 FICA.
How much is $80,000 after taxes in Connecticut?
A single filer earning $80,000 in Connecticut takes home approximately $60,958 per year — about $5,080/month or $2,345 per biweekly paycheck. Total taxes: $19,042 (23.8% effective rate), split between federal income tax ($8,972), FICA ($6,120), and Connecticut state tax ($3,950).
How much is $110,000 after taxes in Connecticut?
On a $110,000 salary in Connecticut, a single filer keeps approximately $80,363 per year ($6,697/month). The overall effective tax rate is 26.94%, of which $5,650 is Connecticut state income tax.
What is the Connecticut state tax on a $60,000 salary?
Approximately $2,850 for 2026 (single filer). Combined with $5,030 federal income tax and $4,590 FICA, total deductions reach $12,470 and take-home pay is $47,531.
What percentage of my paycheck goes to taxes in Connecticut?
Between 20.78% and 26.94% for salaries in the $60,000–$110,000 range (single filer, 2026 rates). The biggest pieces are federal income tax and 7.65% FICA; Connecticut state tax adds roughly 4.94% at $80,000. Use the self-employed tax calculator above for your exact numbers.