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DBA Filing in Connecticut: Who Issues It, Cost & Steps

A DBA filing is a local permit. In Connecticut, as everywhere else in the US, it comes from a city or county office rather than a state agency — so the first job is working out which local office covers your address.

Typical cost (US range)

$10–$150

Typical timeline

1–30 days

Renewal

Several jurisdictions expire a DBA after a set number of years; others do not expire at all.

Who needs it

sole proprietors, partnerships, and LLCs operating under a name different from the legal registered name

Connecticut does not have a separate DBA filing process-you register a business name through the Secretary of the State's office.

Connecticut businesses operating under a trade name file through the state's business registration system. The official Business.CT.gov portal is where you search for name availability and handle all business filings, including trade name registration.

You can search to see if your desired business name is available before filing.
“Use the Business Records Search tool to find out if your desired business name is available.”
https://business.ct.gov
The Secretary of the State's office oversees all business filings and registrations in Connecticut.
“The letter you received will be located under your most recent business filing history.”
https://business.ct.gov
Business.CT.gov is the official portal where you handle your trade name registration and other business filings.
“Welcome to Business.CT.gov . No matter your business needs, we're here to help. Start a business, expand a business, or find out what licenses, permits, and filings you'll need to begin.”
https://business.ct.gov
You must create an online account with CT.gov to file business documents in Connecticut.
“To file a UCC lien you first need to create an account with CT.gov or log in to an existing account.”
https://business.ct.gov

Sources (each one opened and read on 2026-09-15)

Business.CT.gov: https://business.ct.gov

Who issues a DBA Filing in Connecticut

This is a local permit. It is issued by your city or county, not by the state of Connecticut. The state office listed underneath handles a related filing — it does not issue this permit.

Connecticut — the state business-filing office (Secretary of State in most states) (registers business entities)
https://portal.ct.gov/sots
https://business.ct.gov

Where a DBA is filed varies more than almost any other filing on this site — county clerk in many states, the state business-filing office in others.

Finding your local office

Start with the city your address sits in — the relevant department is usually called Planning, Building, Community Development, or Business Licensing. If your address is unincorporated, the county performs that role instead. Calling the main switchboard and asking who handles this is usually faster than searching.

Starting point for anything else in Connecticut: the state business portal, https://business.ct.gov. It is a starting point, not the issuer of this permit.

The general US process

This sequence is the shape the process takes across the US. It is not a list of Connecticut requirements, and no step here should be read as one — the issuing office named above sets the actual requirements.

Step 1: Find out where a DBA is filed where you are. County clerk in many states, the state business-filing office in others, and both in a few.
Step 2: Search that register for the name you want.
Step 3: File the statement — often called a fictitious business name or assumed name filing — and pay the fee.
Step 4: Publish the filing in a newspaper if that jurisdiction requires publication. Several do; most do not.
Step 5: File the proof of publication where publication was required.
Step 6: Use the name consistently on marketing, invoices and the bank account.

What varies: county versus state filing, whether publication is required, the fee, and whether the filing expires.

Documents usually asked for

A typical list, not a Connecticut checklist.

Government-issued ID
Legal business name (if an entity, not sole prop)
Business address

Heads up: The government fee is the floor. Filing services will quote you several times that to handle it. For a simple setup the official route is usually straightforward; for a complicated one — multiple states, unusual ownership — paying someone can be the cheaper mistake to avoid.

Related permits in Connecticut

LLC Formation in Connecticut Business License in Connecticut

DBA Filing in states bordering Connecticut

Rules stop at the state line — same permit, each state bordering Connecticut:

DBA Filing in Massachusetts DBA Filing in New York DBA Filing in Rhode Island

See DBA Filing in all 50 states & DC →

Frequently asked questions

Who issues a DBA filing in Connecticut?

Your city or county — not the state.

How much does a DBA filing cost in Connecticut?

We don't publish a Connecticut figure we haven't verified. The typical US range is $10–$150. The office named above has the real number for your address.

How long does it take to get a DBA filing in Connecticut?

Typical US processing is 1–30 days, and expedited handling is often available for a fee. The issuing office publishes its own turnaround, and that is the number to trust.

What is Connecticut-specific on this page: the issuing office, 4 Connecticut facts, each quoted off the government page beside it. Everything else — the numbered process, the document list, the cost and timeline — is the general US pattern, not a Connecticut rule, and is labelled that way above. Requirements, fees and deadlines are set by the issuing office; confirm with it before you file or pay.