Connecticut business licensing guide
Last checked: April 26, 2026
Connecticut does not treat “business license” as one single item for every business. Your steps may include state business registration, a Connecticut tax registration, a Sales and Use Tax Permit, a town clerk trade name certificate, local zoning approval, and industry-specific licenses.
This guide explains which layer handles what, using Connecticut’s actual agency names, portals, and local filing pattern.
The short answer
Connecticut’s official business guidance is activity-based. Business.CT.gov says not all Connecticut businesses have the same tax obligations or need a license or permit, but many do. The right answer depends on what you do, where you operate, whether you sell taxable goods or services, whether you hire workers, and whether your town or city requires local approval.
Most new businesses should start with Business.CT.gov, check state license needs through the Connecticut licenses and permits page, register state tax accounts through myconneCT if needed, and contact the town or city where the business will operate.
Start here if you are opening a Connecticut business
- Write down your business activity. Be specific. A home bakery, retail shop, online seller, contractor, short-term rental, and food truck may all have different rules.
- Check your legal structure. If you are forming an LLC, corporation, or foreign business entity, use Connecticut’s business filing system through Business.CT.gov.
- Check whether you need a town clerk trade name certificate. Connecticut calls a DBA a “Trade Name.” These are filed with the town clerk where the business is transacted, not with the Secretary of the State.
- Check state tax registration. If you sell taxable goods, rent or lease goods, sell taxable services, operate lodging, or need employer withholding, review DRS registration through myconneCT.
- Check eLicense and state boards. Many Connecticut licenses, registrations, permits, and certifications are handled through the eLicense portal or a specific state agency.
- Contact your town or city before signing a lease. Ask about zoning, home occupation rules, certificates of occupancy, health permits, building permits, fire approval, signs, and local business licenses.
- Save proof and renewal dates. Keep copies of permits, tax registrations, trade name filings, local approvals, and agency emails.
Connecticut facts to know before you file anything
| Topic | Connecticut detail | Where to check |
|---|---|---|
| General state license | Connecticut’s official guidance does not point to one universal state license for every business. It directs businesses to activity-based licenses, permits, tax accounts, and local checks. | Business.CT.gov licenses and permits |
| State business portal | Business.CT.gov is Connecticut’s main portal for business filings, business lookup, forms, fees, licenses, tax links, and checklists. | Business.CT.gov |
| Business entity records | Connecticut business records use the Business Records Search. The state uses an ALEI, or authoritative legal entity identifier, for business entities on record. | Business Records Search guide |
| DBA term | Connecticut uses “Trade Name” for many DBA filings. Trade Name certificates are filed with the town clerk where the business is transacted. | Secretary of the State Trade Name page |
| Sales tax permit | Connecticut calls this a “Sales and Use Tax Permit.” DRS lists a $100 fee for registering to collect sales and use tax and says each location needs its own permit. | DRS Sales and Use Tax information |
| State licensing portal | The Connecticut eLicense portal provides access to more than 850 credential types issued by state agencies. | Connecticut eLicense |
| County layer | Connecticut counties are geographic subdivisions. The Secretary of the State says county government was abolished effective October 1, 1960. | Connecticut counties reference |
Do not mix up the license layers
A Connecticut business may deal with several government layers. Each one has a different job.
| Layer | What it may handle | Connecticut note |
|---|---|---|
| Federal | EIN, federal tax duties, federal industry permits, some beneficial ownership reporting for certain foreign reporting companies | Get an EIN directly from the IRS if you need one. FinCEN removed BOI reporting requirements for U.S. companies and U.S. persons under its March 2025 interim final rule, but foreign reporting companies should check FinCEN. |
| State | Entity filings, tax registration, Sales and Use Tax Permit, withholding, unemployment insurance, paid leave, professional licenses, DCP licenses, eLicense credentials | Use Business.CT.gov, DRS, CTDOL, CT Paid Leave, eLicense, and the agency that regulates your industry. |
| County | Usually not a business licensing layer in Connecticut | Connecticut county government was abolished. Check towns, cities, boroughs, regional health districts, and state agencies instead. |
| Town or city | Trade name certificates, zoning, home occupation rules, building permits, certificates of occupancy, fire review, signs, local licenses, health permits, vendor permits | Contact the town clerk, zoning or planning office, building department, fire marshal, health department, or local business office for your location. |
| Private platforms | Marketplace seller rules, payment processing rules, insurance rules, platform documents | An Etsy, Amazon, Shopify, delivery app, or booking platform rule is not the same as a Connecticut license, but it may still affect how you operate. |
Important: Forming an LLC is not the same as getting a business license. A Connecticut LLC filing creates or registers a legal entity. It does not replace sales tax registration, zoning approval, a trade name certificate, a food license, a contractor registration, or a professional license.
State business registration in Connecticut
If you form an LLC, corporation, limited partnership, or certain other legal entities in Connecticut, you file with the Connecticut Secretary of the State through Business.CT.gov. If your business was formed outside Connecticut and will do business in Connecticut, you may need a foreign business filing.
Business.CT.gov lists forms and fees for domestic and foreign LLCs, corporations, statutory trusts, partnerships, annual reports, certificates, copies, UCC filings, and business changes. Check the current fee page before filing because fees and forms can change.
Do this before you file
- Search Connecticut business records for your desired name.
- Choose the right legal structure for your situation.
- Use the current Business.CT.gov forms and fees page.
- Save your Connecticut business ID or ALEI after filing.
- Do not assume entity approval means local zoning or licensing approval.
Start with Register your business on Business.CT.gov and the Business Forms and Fees page.
Trade names, DBAs, and assumed names in Connecticut
Connecticut uses the term “Trade Name” for many DBA filings. The Secretary of the State says a Trade Name filing does not create a separate business entity. It is different from forming an LLC or corporation.
Trade Name certificates are filed with the town clerk in the town where the business is transacted. They are not filed with the Office of the Secretary of the State. An LLC or corporation that does business under a name different from its registered name must file a Trade Name certificate with the town clerk.
For example, if “Elm Street Landscaping LLC” operates only as “Elm Street Landscaping LLC,” a Connecticut Trade Name filing may not be needed for that name. If the same LLC operates as “Green Yard Pros,” it may need a Trade Name certificate in the town where it transacts business.
Practical tip: Ask the town clerk whether the trade name form must be notarized, whether all owners or authorized signers must sign, what fee applies, and whether zoning approval is required before the clerk accepts the filing.
Start with the Connecticut Secretary of the State Trade Name page. Then contact the town clerk where the business is located or transacted.
Sales tax, seller’s permit, and Connecticut tax registration
Connecticut does not usually call this a “seller’s permit.” The state term to know is Sales and Use Tax Permit. It is handled by the Connecticut Department of Revenue Services, or DRS.
DRS says you must obtain a Sales and Use Tax Permit if you intend to sell, rent, or lease goods in Connecticut, sell a taxable service, or operate a hotel, motel, lodging house, or bed and breakfast establishment. DRS also says sellers at flea markets, craft shows, trade shows, antique shows, fairs, and similar events need a permit even if they sell for only one day.
DRS lists a $100 fee for registering to collect sales and use tax. After registration, the Sales and Use Tax Permit should be displayed conspicuously for customers to see. If you have more than one location, DRS says you must obtain a permit for each location. If you buy an existing business, you cannot use the permit issued to the previous owner.
| Connecticut item | What it does | Where to start |
|---|---|---|
| Connecticut Tax Registration Number | Registers the business with DRS for the tax types that apply to the business. | Registering with DRS |
| Sales and Use Tax Permit | Lets a business collect and remit Connecticut sales and use tax when required. | DRS Sales Tax Information |
| Form REG-1 through myconneCT | DRS says new businesses must complete Form REG-1 electronically using myconneCT. | DRS registration applications |
| Income tax withholding | Employers generally register with DRS to withhold Connecticut income tax if they employ workers. | DRS withholding information |
| Resale certificate | A resale certificate is not the same thing as a Sales and Use Tax Permit. It is documentation used for qualifying resale purchases. | DRS exemption certificates |
Do not skip this step if you sell taxable items or services. A local business license, town trade name, or LLC filing does not replace DRS tax registration.
If you hire workers in Connecticut
Hiring workers can add several registrations. These are separate from business entity formation and local licensing.
- Federal EIN: The IRS says businesses generally need an EIN if they hire employees, operate a partnership or corporation, pay certain taxes, or change business structure.
- DRS withholding: Connecticut employers generally register with DRS for income tax withholding through myconneCT.
- Unemployment insurance: Connecticut Department of Labor uses ReEmployCT for unemployment insurance tax and wage reporting. CTDOL says employers apply for an Employer Account Number, file quarterly tax and wage reports, and pay unemployment insurance taxes through ReEmployCT.
- CT Paid Leave: CT Paid Leave says covered employers with one or more employees in Connecticut must register with CT Paid Leave to remit worker contributions.
- New hire reporting: Connecticut Department of Labor operates the state new hire reporting system.
Start with the IRS EIN page, DRS withholding information, CTDOL unemployment insurance tax page, CT Paid Leave registration page, and the Connecticut New Hire Reporting site.
Industry-specific Connecticut licenses and permits
Many Connecticut businesses do not need the same state license. The license depends on the work. Business.CT.gov points businesses to licenses and permits by business type, and the eLicense portal lets users renew, verify, or apply for many state credentials.
Common state agencies to check
- Department of Consumer Protection: DCP handles many licenses, registrations, and permits, including many regulated business and professional areas.
- eLicense: Connecticut eLicense provides real-time access to hundreds of licenses, registrations, permits, and certifications for individuals, organizations, and facilities.
- Department of Public Health: Food service licensing is often handled through local health departments. DPH says requirements and procedures may vary from town to town, and businesses should contact the local health department before construction or renovation.
- Department of Agriculture: DoAg licenses and permits can apply to agricultural commodities, dairy products, livestock and poultry, domestic animal facilities, aquaculture, shellfish, kennels, pet shops, and related activities.
- Department of Energy and Environmental Protection: DEEP permits can matter for environmental, waste, water, air, natural resource, and certain special-use activities.
Food businesses need extra care. A food business may need local health approval, a DRS Sales and Use Tax Permit, zoning approval, fire or building approval, DCP food-related licensing for some activities, and possibly state or local mobile vending rules.
Start with Business.CT.gov licenses and permits, Connecticut eLicense, and the agency that regulates your industry.
Home-based businesses still need local checks
A home-based business in Connecticut may still need state tax registration, a Trade Name certificate, a professional license, a food or health permit, or local zoning approval. The fact that you work from home does not automatically remove licensing rules.
Contact your town or city planning, zoning, or land use office before you rely on a home address for business operations. Ask whether your activity is allowed at the address, whether customer visits or employees are allowed, whether signs are restricted, whether inventory storage is allowed, and whether a home occupation permit or zoning certificate is required.
Do not assume “online only” means “no license.” If you sell taxable products into Connecticut, store inventory, prepare food, visit customers, hire workers, or use a trade name, you may still have state or local steps.
The town and city layer matters in Connecticut
Connecticut is strongly local for many business steps. Because counties do not operate as a normal business licensing layer, your town or city often handles the practical location approvals.
Depending on the business and address, local checks may include:
- Town clerk Trade Name certificate
- Local business license or vendor license, if your municipality requires one
- Zoning approval or zoning permit
- Home occupation approval
- Certificate of occupancy or change-of-use review
- Building permits for construction, renovation, signs, equipment, or layout changes
- Fire marshal inspection or approval
- Local health department permit for food, pools, salons, personal services, lodging, or other inspected uses
- Special event, mobile vending, outdoor dining, sidewalk, street use, or temporary permit
Hartford’s official “Starting a Business” page tells businesses to call Planning and Zoning to verify zoning use before signing a lease. That is good advice across Connecticut. Check the address first, not after you buy equipment or sign a long lease.
Connecticut city starting points
Use your exact town or city. The examples below show how local rules can differ inside Connecticut.
| Place | Useful starting point | What to check |
|---|---|---|
| Hartford | BusinessLicenseGuide Hartford guide and Hartford Starting a Business | Zoning use before signing a lease, city permits, trade name, health, building, fire, and state tax registration. |
| Bridgeport | BusinessLicenseGuide Bridgeport guide and Bridgeport Trade Name Registration | Trade name filing, state entity filing first for LLCs and corporations, zoning, health, building, and local permits. |
| New Haven | New Haven Licenses & Permits | Business license, food license, food trucks, street vendor license, zoning permit, signs, special events, and other city permits. |
| Stamford | Stamford Permits and Licenses | Building, health, zoning, food establishment, mobile food, outdoor dining, special events, trade name, and other city permits. |
| Waterbury | Waterbury City Planning, Zoning & Inland Wetlands and Waterbury Trade Name Certificates | Zoning, land use, site plan, wetlands, trade name certificate, local permits, and inspected uses. |
If your city is not listed here, search for “[your town or city] Connecticut town clerk trade name,” “[your town or city] zoning,” and “[your town or city] permits.” Use official .gov or municipal websites when possible.
Official Connecticut agency directory
Use these official sources as starting points. The right agency depends on your business activity.
- Business.CT.gov — main Connecticut business portal for business services, forms, records, taxes, licenses, permits, and checklists.
- Business Forms and Fees — current state business filing forms and fees for domestic and foreign entities.
- Business Records Search — search Connecticut domestic and foreign business records.
- Secretary of the State Trade Name page — Connecticut DBA and Trade Name guidance.
- DRS Registering Your Business — Connecticut tax registration through myconneCT.
- DRS Sales and Use Tax Information — Sales and Use Tax Permit rules and registration information.
- Connecticut eLicense — apply, renew, verify, and search many Connecticut licenses, registrations, permits, and certifications.
- Department of Consumer Protection business licenses, registrations, and permits — DCP-regulated business credentials.
- Department of Public Health Food Service Licensing — food service licensing guidance and local health department direction.
- Department of Agriculture Licenses and Permits — farm, animal, dairy, livestock, poultry, aquaculture, and related licenses.
- DEEP Permits and Licenses — environmental and natural resource permits.
- Connecticut Department of Labor Unemployment Insurance Tax — ReEmployCT and employer unemployment tax registration.
- CT Paid Leave Register Your Business — paid leave registration for covered employers.
- IRS Employer Identification Number — federal EIN information.
- FinCEN BOI update — March 2025 interim final rule on beneficial ownership reporting.
Common Connecticut mistakes to avoid
- Calling everything a business license. Connecticut may use terms like Trade Name, Sales and Use Tax Permit, Connecticut Tax Registration Number, eLicense credential, zoning permit, or food service license.
- Filing an LLC and stopping there. Entity formation does not replace DRS registration, town clerk trade name filings, local zoning approval, or industry licenses.
- Missing the town clerk Trade Name step. Connecticut Trade Name certificates are local town clerk filings, not Secretary of the State filings.
- Using the old owner’s Sales and Use Tax Permit. DRS says a buyer of an existing business may not use the permit issued to the previous owner.
- Forgetting each location. DRS says a business with more than one location must obtain a Sales and Use Tax Permit for each location.
- Signing a lease before zoning review. Ask the local planning or zoning office whether your business use is allowed at that address before you commit.
- Assuming the county handles it. Connecticut counties are not the normal business licensing layer. Check the town, city, regional health district, and state agency instead.
- Trusting unofficial payment requests. Pay only through official agency portals or instructions. If an invoice seems suspicious, contact the town, city, or state agency using contact information from the official website.
What to ask when you contact the agency
Before calling or emailing, have your business type, legal name, trade name, address or general location, town or city, whether the business is home-based, mobile, online, storefront, or food-related, and a short list of products or services ready.
Phone or email script
Hello. I am planning to operate a [business type] in [city or town], Connecticut. The business will be [home-based / mobile / storefront / online] at [address or general location]. I will sell or provide [products or services]. Can you confirm whether I need a local business license, Trade Name certificate, zoning approval, home occupation approval, certificate of occupancy, health permit, building or fire approval, or another local permit before I start? If your office does not handle this, which office should I contact next?
- Write down the exact license, permit, approval, or registration name.
- Write down the office name and the person or department that answered.
- Ask for the official application link or form.
- Ask whether zoning must be approved before the trade name, lease, construction, or opening date.
- Ask whether a fee page, renewal rule, inspection, hearing, or waiting period applies.
- Ask whether another state agency, regional health district, fire marshal, or building department must also review the business.
- Save the date of the call or email and keep the written response if you receive one.
Connecticut business license checklist
- Describe your business clearly. Include what you sell, where you sell, whether customers visit, whether food is involved, whether you visit customer sites, and whether you will hire workers.
- Check the business name. Search Connecticut business records if you plan to form or register a legal entity.
- Form or register the legal entity if needed. Use Business.CT.gov for Connecticut LLCs, corporations, and foreign business filings.
- Get an EIN if needed. Apply directly through the IRS if your structure or hiring plans require one.
- File a Trade Name certificate if needed. Contact the town clerk where the business is transacted.
- Register with DRS if needed. Use myconneCT for applicable tax types, including sales and use tax and employer withholding.
- Check whether a Sales and Use Tax Permit is required. This is especially important for retail sales, taxable services, lodging, contractors, and temporary sellers at shows or fairs.
- Check eLicense and your regulating agency. Search by your business activity, not just by the words “business license.”
- Check local zoning before signing a lease. Ask the planning or zoning office whether the business use is allowed at the address.
- Check health, building, fire, and sign rules. These often apply before opening a storefront, food business, salon, lodging use, school, daycare, or public-facing location.
- Register as an employer if you hire workers. Check DRS withholding, CTDOL ReEmployCT, CT Paid Leave, workers’ compensation, workplace posters, and new hire reporting.
- Keep records and renew on time. Put renewal dates, permit numbers, inspection reports, and agency contacts in one folder.
Review note
This page was last checked against Connecticut official sources on April 26, 2026. Business licensing rules, fees, forms, portals, and local procedures can change. Always confirm important details with the official agency before you file, pay, sign a lease, hire workers, or open to customers.
FAQ
Does Connecticut have one statewide general business license?
Connecticut’s official business guidance does not point to one universal state license for every business. It says not all businesses in Connecticut have the same tax obligations or need a license or permit, but many do. Use Business.CT.gov, myconneCT, eLicense, and your town or city office to check your exact activity and location.
Is an LLC the same as a Connecticut business license?
No. An LLC is a legal entity filing with the Connecticut Secretary of the State. It does not replace a Sales and Use Tax Permit, Trade Name certificate, zoning approval, local permit, food license, professional license, employer registration, or other requirement that may apply to your business.
What is a DBA called in Connecticut?
Connecticut generally uses the term Trade Name. Trade Name certificates are filed with the town clerk in the town where the business is transacted. The Secretary of the State says a Trade Name filing does not create a separate business entity.
Where do I register for Connecticut sales tax?
Register with the Connecticut Department of Revenue Services through myconneCT. Connecticut calls the sales tax registration a Sales and Use Tax Permit. DRS says the permit is required for selling, renting, or leasing goods, selling taxable services, operating certain lodging, and selling at events such as fairs or craft shows when the rule applies.
Do I need a county business license in Connecticut?
Usually no. Connecticut counties are geographic subdivisions, and the Secretary of the State says county government was abolished effective October 1, 1960. For licensing questions, check the state agency, town clerk, city or town zoning office, local health department, building department, fire marshal, or other local office.
Do home-based businesses need licenses in Connecticut?
They may. A home-based business may still need DRS tax registration, a Sales and Use Tax Permit, a Trade Name certificate, a professional license, food approval, or local zoning or home occupation approval. Contact your town or city before you start operating from home.
What should I check before signing a lease for a Connecticut business?
Check zoning first. Ask the local planning or zoning office whether your exact business use is allowed at the address. Also ask about building permits, certificate of occupancy, fire approval, health permits, signs, parking, outdoor activity, and any local license before you commit to the space.
Plain-English disclaimer
This guide is for general information only. It is not legal, tax, financial, insurance, employment, safety, zoning, immigration, or professional advice. Business rules, fees, forms, and agency procedures can change. Confirm important details with the official agency or a qualified professional before you act.