How to Start an S Corp in Connecticut

You can start an S corporation (S corp) in Connecticut by forming a limited liability company (LLC) or a corporation, and then electing S corp status from the IRS when you apply for your Employer Identification Number (EIN).

An S corp is an Internal Revenue Service (IRS) tax classification, not a business structure. The S corp status is used to reduce a business’s tax burden in certain circumstances.

We will explain when you should choose S corp status and the steps that are needed to start an S corp in our How to Start an S Corp in Connecticut guide below.

Recommended: If you have an existing LLC, visit our How to Convert an LLC to S Corp guide.

Best Service to Form an S Corporation:


We recommend using ZenBusiness to form your S corporation.


Factors to Consider Before Starting an S Corp

Before forming an S corp, you have to consider the following factors:

  • Is an S corporation the best strategy for your business?
  • S corporation restrictions
  • Why an LLC is the best structure for the S corp tax status
  • Are S corp tax advantages right for you?


Is an S Corporation the Best Strategy for Your Business?

For help with choosing the right structure for your business, visit our Choosing a Business Structure guide.

S Corporation Restrictions

S corps have several restrictions, such as being limited to one class of stock and 100 shareholders. Read our What Is an S Corporation guide for full details.

Why an LLC Is the Best Structure for the S Corp Tax Status

As entrepreneurs, we believe that starting an LLC is the best way for forming an S corporation because any advantages of forming a corporation are negated by S corp restrictions. LLCs are also easier to maintain than corporations.

Are S Corp Tax Advantages Right for You?

You need to know if the S corp tax status versus a default LLC tax status will be better for your business. To fully understand the tax advantages of an S corp, read our LLC vs. S corp guide.

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Businesses that elect S corp status will need to hire payroll and accounting services.

Payroll Services Review | Accounting Services Review

How to Form an S Corp

There are two main ways to start an S corp:

  • By forming an LLC and electing S corp tax status from the IRS when you request your employee identification number (EIN)
  • By forming a corporation and electing S corp status from the IRS

We recommend not starting a corporation with the S corp tax status because the S corp negates all of the benefits of a corporation.

Recommended: If you have an existing LLC, visit our How to Convert an LLC to S Corp guide.

Steps for Forming an LLC and Electing S Corp Status in Connecticut

Starting a Connecticut LLC and electing S corp tax status is easy. You can use our guides to start an LLC with the S corp status yourself, or you can hire a service provider like ZenBusiness to do it for you.


There are five basic steps to start an LLC and elect S corp status:

Step 1: Name Your LLC

Step 2: Choose a Registered Agent

Step 3: File the Certificate of Organization

Step 4: Create an Operating Agreement

Step 5: Get an EIN and File Form 2553 to Elect S Corp Tax Status


Step 1: Name Your LLC

Choosing a company name is the first and most important step in starting your LLC in Connecticut.

Be sure to choose a name that complies with Connecticut naming requirements and is easily searchable by potential clients.

1. Follow the naming guidelines for a Connecticut LLC:

  • Your name must contain the words “limited liability company” or the abbreviation “L.L.C.” or “LLC”. “Limited” may be abbreviated as “Ltd.,” and “company” may be abbreviated as “Co.”

  • Your name cannot include words that could confuse your LLC with a government agency (FBI, Treasury, State Department, etc.).

  • Your name must be distinguishable from any existing business in your state.

  • Your name must not include any words that imply that the company is organized for anything other than its permitted purpose.

  • Certain restricted words (e.g., Bank, Attorney, University) may require additional paperwork and a licensed individual, such as a doctor or lawyer, to be part of your LLC.

You can also read the Connecticut state statute about LLC naming guidelines for more information.

2. Is the name available in Connecticut? You can use the business registry search on the Connecticut Secretary of the State website to see if your desired LLC name is available.

3. Is the URL available? We recommend checking to see if your business name is available as a web domain. Even if you don't plan to create a business website today, you may want to buy the URL in order to prevent others from acquiring it.

Find a Domain Now

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After registering a domain name, consider setting up a professional email account (@yourcompany.com). Google's G Suite offers a business email service that comes with other useful tools, including word processing, spreadsheets, and more. Try it for free


Step 2: Choose Your Connecticut Registered Agent

You must elect a registered agent for your Connecticut LLC.

An LLC registered agent will accept legal documents and tax notices on your LLC's behalf. You will list your registered agent when you file your LLC's Certificate of Organization.

Many business owners choose to hire a registered agent service. Many of these services will form your LLC for a small fee and include the first year of registered agent services for free.

Connecticut Registered Agent Consent to Appointment

Registered agents in Connecticut must consent to their appointment by signing the Certificate of Organization in written or electronic form.

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Recommended: ZenBusiness provides the first year of registered agent service free with S corp formation.


Step 3: File the Connecticut LLC Certificate of Organization

The Connecticut Certificate of Organization is used to officially register an LLC.

File Your Connecticut Certificate of Organization

OPTION 1: File Online With the Connecticut Secretary of State

File Online

- OR -

OPTION 2: File by Mail or in Person

Download Form


State Filing Cost: $120, payable to the Secretary of State

Mailing Address:
Business Service Division
Connecticut Secretary of the State
P.O. Box 150470
Hartford, CT 06115

Office Address:
Business Service Division
Connecticut Secretary of the State
30 Trinity St.
Hartford, CT 06106


Step 4: Create an LLC Operating Agreement

An LLC operating agreement is a legal document that outlines the ownership and member duties of your LLC.

For more information, read our Connecticut LLC Operating Agreement guide.

Our operating agreement tool is a free resource for business owners.


Step 5: Get an EIN and Complete Form 2553 on the IRS Website

An EIN is a number that is used by the US Internal Revenue Service (IRS) to identify and tax businesses. It is essentially a Social Security number for a business.

EINs are free when you apply directly with the IRS.

Elect S Corp Tax Status
During the online EIN application, the IRS will provide a link to Form 2553, the Election By a Small Business form.

Visit our Form 2553 Instructions guide for detailed help with completing the form.

This is the form to elect S corp tax status for your LLC:

Screenshot of IRS online EIN application.

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Hire a service provider like ZenBusiness to form an LLC and elect S corp status for you.

Start an S Corp FAQ

What is an S corp?

An S corporation (S corp) is a tax designation for which an LLC or a corporation can apply.

Is an S corp an LLC?

No. An S corp is a tax designation for which an LLC or a corporation can elect.

How do you form an S corp?

You can form an S corp by filing Form 2553 with the Internal Revenue Service (IRS).

What are the requirements for an S corp?

S corps must meet four requirements:

  • They can have no more than 100 shareholders.
  • All shareholders must be private individuals (not other business entities).
  • Shareholders cannot be nonresident aliens.
  • The business may only issue one class of stock-this means all members must have the same distribution amount.

What are the benefits of an S corp?

Owners of S corps are considered employees of their company and can save thousands of dollars on self-employment taxes as a result.

Are taxes for LLCs and S corps the same?

No. The default taxes for an LLC and taxes for an S corp are not the same.

With an S corp, owners pay personal income tax and self-employment tax on a predetermined salary. They may then withdraw any remaining profits from the business as a “distribution,” which isn’t subject to self-employment tax.

With an LLC, all company profits pass through to the owners’ personal tax returns, and then the owners must pay personal income tax and self-employment tax on the entire amount.

Both LLCs and S corps benefit from a provision in the Tax Cuts and Jobs Act of 2017 that allows qualifying owners of pass-through entities to deduct 20% of qualified business income (QBI) from their tax returns. However, for S corps, the deduction doesn’t apply to profits paid out as wages.

What is a reasonable salary for an S corp?

Unlike the default LLC business structure, in which owners must pay self-employment tax on all of the company’s profits, owners of S corps are considered employees of the business and only have to pay self-employment tax on a salary they receive. Any other money they take from the company’s profits in the form of disbursements isn’t subject to self-employment tax.

S corp owners are required to earn a “reasonable” salary, which basically means a fair market rate based on the individual’s qualifications as well as their duties and responsibilities at the company. The purpose of this requirement is to prevent S corp owners from paying themselves an artificially low salary in order to pay less self-employment tax.

What is a distribution?

A distribution is a dividend that a shareholder/owner can take from the business profits that remain after a company pays all of its employee salaries. Shareholders must pay personal income tax on distributions, but distributions aren’t subject to self-employment tax.

What is pass-through taxation?

Pass-through taxation is a system of taxation that generally applies to sole proprietorships, partnerships, LLCs, and S corps. In this system, the profits or losses of the business are not taxed at the business level. Instead, they pass through to the owners’ personal tax returns and are taxed at each owners’ personal income tax rate.

What is the S corp tax rate?

There’s no corporate tax rate for S corps. Instead, owners of S corps pay personal income tax on the company’s profits. This rate depends on each owner’s personal income tax bracket.

Can I still use my DBA name if I elect to be an S corp?

LLCs and corporations that operate under a “doing business as” (DBA) name can choose the S corp election.

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