How to Form a Connecticut Limited Partnership, Step by Step

Before anything gets filed, your intended name has to be available and has to satisfy Connecticut's naming rules for limited partnerships. Two things are going on here: distinguishability and required wording.

Connecticut won't register a name that isn't distinguishable from an entity already on the books. "Distinguishable" is a stricter test than it sounds — adding a comma, swapping "and" for an ampersand, or tacking on a word like "Company" often isn't enough to separate you from an existing registrant. Start by running your candidate through the state's business name search.

Naming rules specific to an LP

A Connecticut limited partnership's name generally must include language identifying it as a limited partnership — typically the words "Limited Partnership" or an accepted abbreviation such as "L.P." or "LP." The name cannot imply that the entity is a different type of business than it is, and it can't include terms restricted to banks, insurers, or other regulated fields without the proper approvals.

If the name is available but you're not ready to file

Have a couple of alternates ready before you file, because a name that looked open can collide with a filing that lands before yours. If you need to lock a name down ahead of forming, Connecticut offers a name reservation you can file with the Secretary of the State to hold it for a set period while you finish your paperwork.

This is the step that has no LLC equivalent, and it's the heart of the entity. An LP is defined by its two classes of partners, and you need at least one of each before you file.

Decide who the general partner is

The general partner manages the business and carries personal liability for the partnership's obligations. That exposure is the reason many people don't want an individual sitting in the general-partner seat. A common move is to form an LLC or a corporation first and name that entity as the general partner, so the personal-liability line stops at the entity. Whether that makes sense for you depends on the size of the venture and what's at stake — it's a question worth putting to a lawyer, because it changes your risk profile materially.

Identify the limited partners

Limited partners contribute capital and share in profits and losses without managing the business. Their protection depends on staying passive; a limited partner who starts running operations can, in some situations, lose the liability cap that defines the role. Get clear up front on who is contributing what, and what each partner is buying with that contribution — this feeds directly into the partnership agreement in Step 4.

Your Certificate of Limited Partnership must name a registered agent, and the LP must keep one continuously for as long as it exists. The agent is the official point of contact for service of process — lawsuits, subpoenas — and for state correspondence.

What the agent has to be

The registered agent needs a physical street address in Connecticut (a P.O. box alone won't do) and must be available during normal business hours to accept hand-delivered legal documents. You can serve as your own agent if you have a qualifying Connecticut address and don't mind that address appearing in the public record. You can name another individual with a Connecticut address. Or you can use a commercial registered agent service.

Why many LPs use a commercial agent

A commercial agent keeps a business address in the public filing instead of your home, and guarantees someone is on hand to receive legal papers even when you're traveling or the office is closed. For a partnership with passive investors who value discretion, keeping personal addresses out of the public record is often reason enough on its own. Mainstay Filing includes registered agent service with formation.

Connecticut does not require you to file a limited partnership agreement with the state, and no one will stop you from operating without one. That doesn't mean you should. For an LP, the partnership agreement is arguably more important than for any other entity, because it defines the relationship between two classes of owners with fundamentally different rights.

A solid limited partnership agreement addresses, at minimum:

• Capital contributions — what each partner puts in, and whether more can be called for later.
• Profit and loss allocation — how gains and losses are split, which often differs from a simple ownership percentage.
• Distributions — when and how cash actually goes out to partners.
• General partner authority — the scope of what the general partner can do without limited-partner consent, and the handful of major decisions (if any) that require a vote.
• Limited partner rights — information rights, transfer restrictions, and the line the limited partner must not cross into management.
• Admission and withdrawal — how new partners come in, how interests transfer, and what happens when a general partner exits.
• Dissolution — the events that wind the partnership down and how assets get distributed.

Without an agreement, Connecticut's default statutory rules fill every gap — and those defaults rarely match the deal the partners actually struck. This is a document to have drafted by an attorney; the allocation of liability and money between a general partner and passive investors is not a template exercise.

The Certificate of Limited Partnership is the filing that legally creates your LP. It's submitted to the Connecticut Secretary of the State through the Business One Stop portal. Until the state accepts it, you don't have a limited partnership — you may have a general partnership by default, which means unlimited liability for every partner.

What the certificate contains

• The limited partnership's name, with the required LP designation.
• The partnership's principal office address.
• The name and Connecticut street address of the registered agent.
• The name and address of each general partner.

Note what's usually not required on the public certificate: the identities of limited partners and the internal financial terms live in your private partnership agreement, not in the state record. Once the state processes the filing, your LP is officially on the books and appears in the public business search.

An LP needs its own federal Employer Identification Number. Because a partnership has more than one owner by definition, it can't use a single person's Social Security number the way a solo sole proprietor might — the EIN is mandatory, not optional.

You get an EIN directly from the IRS, and the online application is free. With the recorded Certificate of Limited Partnership and the EIN in hand, you can open a business bank account in the partnership's name. Keeping partnership funds strictly separate from any partner's personal money isn't just good hygiene — for the general partner especially, clean separation is part of maintaining the integrity of the structure. Commingled funds invite exactly the kind of scrutiny that can unravel liability arrangements.

Forming the LP is a one-time event. Keeping it in good standing is a recurring duty, and Connecticut administratively dissolves entities that let their obligations lapse.

The annual report

Connecticut requires limited partnerships to file an annual report with the Secretary of the State. In Connecticut this report is filed online through the Business One Stop portal — the state does not accept paper for it. The report keeps the state's record of your principal office, general partners, and registered agent current. It isn't a financial disclosure; you're not reporting revenue or profit.

Keep the registered agent current

Your agent must stay reachable at a Connecticut street address for the life of the LP. If the agent moves or resigns, file the change promptly — an LP with an invalid agent on file is out of compliance even if every other filing is current.

Licenses and taxes

Connecticut has no single general business license, but many activities require state or municipal permits, and those run on their own cycles. On the tax side, remember the pass-through entity tax regime the state applies to partnerships. None of this is filed as part of formation, and the tax pieces are worth reviewing with a CPA.