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Home » Obtain a Tax ID (EIN) Number and Register Your Business in Connecticut

Obtain a Tax ID (EIN) Number and Register Your Business in Connecticut

by SW
November 16, 2025
in Blog
Obtain a Tax ID (EIN) Number and Register Your Business in Connecticut

Are you starting a business in Connecticut, US? You must start your business by giving it legal entity status to get other permits or complete the financial duties. Every state in the US has the authority to register businesses and set rules for businesses. 

The business registration comes in handy to obtain the federal Employer Identification number if needed for the business and the state tax ID number later. If you are looking for instructions on how to register and obtain an EIN, you can learn everything here. 

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Register Your Business in Connecticut

For businesses to run efficiently in the United States, they must register with the Secretary of State, the State authority. By registering your business, you ensure no one uses your business name, get access to loans, protect your assets, and others. 

The state has an official portal for business registration to provide them easy access and ensure they can start their business. However, before you move to your business registration, you should gather the following key information:

  • Check the business names on the portal and see if the name is already used by someone or not, to ensure your business name stands out. 
  • You should choose your business structure, sole proprietorship, partnership, corporation, or others, based on your business needs, goals, and other factors. 
  • You should find your NAICS number (North American Industry Classification System) on the portal to use it in the application. 
  • You should have all the details regarding the business, address, email address, or point of contact for your business. 
  • You should prepare the registration fees, which will vary depending on the entity type, such as $120 for LLCs or $250 for a domestic stock corporation; you can check the fees and other service charges here. 

Begin Your Business Registration in Connecticut

Once you have gathered all the information mentioned above, you can begin the business registration process for your company in Connecticut in the following steps:

  • Go to the official Connecticut Business Registration portal. 
  • Now, click the Register Your Business option in blue and click the “Register Today.”
  • Next, sign up for a CT.GOV account if you do not have the username or password. 
  • After that, log in to the portal and access the business registration form. 
  • Start by entering your business information, such as name, location, owner, share value, etc.  
  • Now, enter your information, tax ID number, and others to authenticate that the responsible party is valid. 
  • After that, verify all of your information and finish the Connecticut business registration process to obtain the certificate and create your company as a legitimate legal organization.

How may a business in Connecticut obtain an EIN?

Now that you’ve completed the registration of your business in Connecticut, the next step is to obtain an Employer Identification Number (EIN) for tax purposes. 

While not every business is required to have an EIN, the IRS recommends that businesses obtain one because it helps in various operations.

The federal EIN separates your business taxes from your taxes and helps gain financial identity for various business operations. The IRS enables any entity to get the EIN through an online tool, though we have other methods as well, like mail or fax. 

However, if you wish to get your EIN within 24 hours, go for an online application with your business information, the responsible party information, and others. To finish your online tax ID (EIN) application, follow these steps:

  • Visit the IRS online tool, EIN Assistant, through the direct link. 
  • Next, select your business structure from the list by clicking the Application for EIN. 
  • Afterwards,  provide your business information, registered business name, business address, State registration details, or others. 
  • Next, the portal will ask for the responsible party’s SSN/ITIN and mailing address; enter all details carefully. 
  • Submit the EIN application after you review all the entries because you can apply for one EIN only in 24 hours. 

Your Business Checklist for Connecticut

Whether your business is small or big, you will need a perfect plan to establish it, so that it can grow well. A strong foundation will help you in the long run; hence, to ensure you do not lack here, we have created a checklist for you:

  • Find your business name that meets the naming criteria, as well as unique.
  • Register your business with the Connecticut state authority
  • Apply for a nine-digit tax ID (EIN) number 
  • Get your Business license and permits as per the industry need and state compliance.
  • Get your State tax ID number if required.
  • Do deep research and create a business plan to make it stand stronger in the industry market. 
  • Hire talented and skilled employees who can perform multiple roles or do what they are best at, as start-ups may require people to wear multiple hats. 

Business plans depend on the industry or sector you are entering; however, the paperwork can be similar and hectic, so for government registration and obtaining tax IDs, you should always opt for online methods to save your time and energy. 

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