Connecticut Corporation Annual Report
By Edmond Hui · Facts verified July 29, 2026 against primary state sources
Filing for an LLC instead? See the Connecticut LLC annual report.
What Connecticut requires
Annual Report
| Frequency | every year |
| Due | Annually, filed online (stock corporations file each year based on the registration anniversary) |
| Fee | $150 |
| Form | Annual Report (online-only; no form number) |
Connecticut is one of 41 states on an annual corporate reporting cycle. Nationally, 41 states require an annual corporate report, 7 require one every two years, and 2 require none.
What the filings cost over five years
State filing charges only, incorporation plus five years of reporting, annualized. Corporate income tax and franchise tax are excluded, because both depend on income or net worth.
| Period | State filing charges |
|---|---|
| Incorporation | $250 |
| Each year after (report, annualized) | $150 |
| Five-year equivalent (annualized) | $1,000 |
That ranks Connecticut 47th cheapest of 49 states on five-year corporate filing charges.
Connecticut corporation vs Connecticut LLC
State filing charges only. Corporate income tax and franchise tax are excluded because both depend on income or net worth, so no flat figure exists for either entity.
| Corporation | LLC | |
|---|---|---|
| Formation filing fee | $250 | $120 |
| Report cadence | Every year | Every year |
| Report fee | $150 | $80 |
An LLC is $130 cheaper to file here. That is a one-off charge, so it should not decide the entity type on its own.
Full Connecticut LLC cost breakdown · LLC vs C-corp explained · LLC vs S-corp explained
State taxes a Connecticut corporation pays
Corporate income tax
| Applies | Yes |
| Rate | 7.5% of net income, plus a 10% surtax on companies with >=$100M annual gross income or filing on a combined/unitary basis |
| Minimum tax | $250 |
Franchise or gross-receipts tax
Corporation Business Tax is the greater of the 7.5% net-income tax or the capital-base tax (0.31% of capital base, min $250, capped at $1,000,000), subject to a $250 minimum tax. The capital-base tax is being phased out and is scheduled for full repeal (rate stepped down after 2023). Connecticut abolished the separate $250 Business Entity Tax effective January 1, 2020.
The $250 minimum tax is deliberately left out of the filing-charge totals on this page. A minimum tax is owed to the state tax authority on a tax return, not to the business filing office, but unlike an income-based tax it is a floor, so treat it as a recurring cost of keeping the corporation alive here.
What these totals leave out: the filing-charge figures on this page are what you pay the business filing office. They exclude corporate income tax and any franchise or gross-receipts tax, because both depend on income, net worth or receipts. The section above sets out what Connecticut levies, or that it levies neither. Where a state's franchise tax carries a flat minimum, that minimum is an unavoidable annual cost these totals do not include, and over five years it can be the larger number.
C-corp return: Form CT-1120 (Corporation Business Tax Return)
Frequently Asked Questions
Where these numbers come from
This page covers the recurring report a for-profit corporation files with Connecticut. Every figure was checked against Connecticut's own published sources on July 29, 2026, the state business filing agency's fee schedule, the governing statute, and where a state tax applies, the state Department of Revenue. Commercial formation-service pages were used as leads only and are never cited. Anything the review could not confirm from an official source is left blank on this page rather than filled with an estimate.
Corporate income tax and franchise tax are quoted as the state publishes them, as rate schedules and thresholds, and are excluded from every dollar total here. They depend on income or net worth, so there is no flat figure that would be true for every corporation.
Primary sources:
This guide is general information, not legal or tax advice, and reading it does not create an attorney-client relationship. It describes rules that can differ from state to state, and fees, rates, forms and deadlines can change after we review them. It cannot tell you what applies to your own business: that turns on where the business is formed, where it operates and how it is taxed. Confirm anything you rely on with the state or federal agency concerned, or with a licensed attorney or CPA, before you act on it.
More for Connecticut LLCs
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Edmond Hui · Founder, MyStateLLC
Edmond Hui is a software engineer and serial entrepreneur based in New York who has founded multiple online businesses across e-commerce, media, and information publishing. Before transitioning into tech, he spent years as a commercial real estate professional closing deals totaling over 100,000 square feet, giving him firsthand experience with business formation and entity structuring. He built MyStateLLC to provide the free, state-specific LLC guidance he wished existed when forming his own companies.