Connecticut 1099 Self-Employment Tax Calculator

Connecticut has a progressive income tax with a top rate of 6.99%. Estimate your self-employment tax, federal and Connecticut state tax, effective rate, and quarterly payment amounts below.

Tax year 2026Last updated September 18, 2026

Total estimated tax

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Effective rate

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Take-home

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Set aside per $1

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Self-employment tax: —
Federal income tax: —
State income tax: —

Quarterly payment vouchers

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Estimates for tax year 2026, for informational purposes only — not tax advice. California's 2026 brackets haven't been published yet, so the most recent confirmed prior-year schedule is used as a placeholder; figures for New York, Ohio, Georgia, Virginia, Arizona, Massachusetts, Utah, Vermont, Maine, Mississippi, Missouri, Colorado, Connecticut, Delaware, Idaho, New Mexico, Oklahoma, and Oregon are drawn from secondary sources pending direct confirmation against the state's own published schedule. Consult a tax professional before filing.

Connecticut self-employment tax, explained

Connecticut applies a "benefit recapture" mechanism that claws back the value of its lower brackets for high earners, so a freelancer whose net income crosses into that zone can see a bigger jump in state tax than the bracket table alone suggests.

Self-employment (SE) tax is the same everywhere — 15.3% of 92.35% of your net profit, split between Social Security (12.4%, up to the annual wage base) and Medicare (2.9%, uncapped). What changes by state is the income tax layer on top: Connecticut has a progressive income tax with a top rate of 6.99%, applied to your taxable income after federal deductions. For filing status, Connecticut's tax doubles every bracket threshold for joint filers compared to single filers, similar to the federal structure.

Connecticut's 2026 figures are drawn from secondary sources (tax-data aggregators and professional publications), not a direct fetch of the state's own published schedule. They're corroborated across multiple sources but not independently confirmed — re-verify against the state's official publication before relying on this for a specific filing decision.

Connecticut state tax at different income levels

Computed directly from Connecticut's actual 2026 tax structure — a single filer with no other income and no expenses, at increasing levels of net 1099 profit:

Net profit	Connecticut state tax	Effective state rate
$50,000	$843	1.7%
$100,000	$2,631	2.6%
$150,000	$4,675	3.1%
$250,000	$9,261	3.7%

Connecticut worked example

A single freelancer in Connecticut with $75,000 in net 1099 income and no other income:

Self-employment tax: $10,597
Federal income tax: $4,898
Connecticut state income tax: $1,680
Total tax: $17,175 (about 22.9% effective rate)
Take-home: $57,825
Quarterly estimated payment: $3,864 per quarter

Try your own numbers in the calculator above — your actual income, expenses, and filing status will change these figures.

Frequently asked questions

What is the Connecticut state income tax rate for 1099 income?

Connecticut has a progressive income tax with a top rate of 6.99%. Its tax doubles every bracket threshold for joint filers compared to single filers, similar to the federal structure. See the "Connecticut self-employment tax, explained" section above for how it applies to your specific numbers.

How is self-employment tax calculated?

Self-employment tax is 15.3% of your net self-employment earnings (92.35% of net profit): 12.4% Social Security up to the annual wage base, plus 2.9% Medicare on all net earnings. If your combined income exceeds the Additional Medicare Tax threshold for your filing status, an extra 0.9% applies above that threshold.

What's the difference between self-employment tax and income tax?

Self-employment tax funds Social Security and Medicare — it's the self-employed equivalent of the payroll taxes an employer would otherwise split with you. Federal (and state) income tax is separate, calculated on your taxable income after deductions like the standard deduction and the QBI deduction.

Other Northeast states

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