How to Start an Arizona Limited Partnership — Step by Step

Your limited partnership's name has to be distinguishable from every other business name already on file with the Arizona Secretary of State. It also has to carry a limited partnership designator — "Limited Partnership," "L.P.," or "LP" — so the public can tell what kind of entity it is dealing with.

Because Arizona splits business filings between two agencies, checking availability is a two-place job. Limited partnership and trade names are searchable through the Secretary of State's business search, while LLC and corporation names live in the Corporation Commission's database. A name that is free at one agency can still collide with a similar name at the other, so it is worth checking both before you commit.

Naming rules to keep in mind

• The name must include a limited partnership indicator such as "Limited Partnership" or "L.P."
• It cannot imply the entity is a corporation, bank, or a government body it is not.
• Restricted words tied to regulated industries (banking, insurance, trust services) may require separate approval.
• Small differences like punctuation, "the," or "and" usually do not make a name distinguishable on their own.

If you have the name but are not ready to file, you can reserve it with the Secretary of State to hold it while you finish the rest of the setup.

Arizona requires every limited partnership to name a statutory agent — the state's term for what most other states call a registered agent. The statutory agent is the official recipient of lawsuits, service of process, and state correspondence, and their name and Arizona street address go on the public Certificate of Limited Partnership.

The agent must have a physical street address in Arizona; a P.O. box alone does not satisfy the requirement. Critically, the agent has to formally consent to the role. Arizona uses a statutory agent acceptance so the state has proof the agent agreed to serve.

Who can be your statutory agent

• A general partner: Any general partner with an Arizona street address who is reliably available during business hours. The address becomes part of the public record.
• Another individual: An Arizona resident you trust — an attorney, a colleague, a family member with an Arizona address.
• A commercial statutory agent service: A company authorized to serve as agent in Arizona. This keeps a professional address in the public certificate instead of a partner's home address and ensures someone is always available to accept documents.

Many partnerships use a commercial agent specifically so a general partner's home address stays out of the searchable public record and so service of process is never missed because someone was traveling.

The Certificate of Limited Partnership is the document that brings your entity into legal existence. You file it with the Arizona Secretary of State, not the Corporation Commission. Once the Secretary of State records it, the partnership exists and can transact business in its own name.

What the certificate includes

• Partnership name with its required limited partnership designator
• Statutory agent name and Arizona street address, plus the agent's consent
• General partner(s): each general partner's name and address
• Principal office and mailing address for the partnership

Limited partners are deliberately left off the certificate. The public filing shows who manages and who accepts service; it does not reveal who invested. Those details stay inside your limited partnership agreement.

Timing

Standard processing at the Secretary of State runs roughly two weeks. If you are working against a deadline — a closing, a financing round, a lease — file with that window in mind. Once the certificate is recorded, you can move on to the federal tax ID and banking steps.

The limited partnership agreement is the private contract among the partners, and it is where the real substance of the arrangement lives. Arizona does not require you to file it with the state — it never becomes public — but you should not operate without one, especially once money changes hands.

What a complete agreement covers

• Capital contributions: What each general and limited partner contributed, and any obligation to contribute more later
• Profit and loss allocation: How income and losses are split, which need not track contribution percentages exactly
• Distributions: When cash goes out to partners and in what order of priority
• Management authority: What the general partner can decide alone and what, if anything, requires limited-partner consent
• Limited partner rights: Information rights, voting on major events, and the limits that keep limited partners passive enough to preserve their liability shield
• Transfers and admission: How partnership interests can be sold or assigned and how new partners are admitted
• Dissolution and winding up: What triggers the end of the partnership and how assets are distributed

Without a written agreement, the default provisions of the Arizona Uniform Limited Partnership Act fill the gaps — and those defaults may not reflect the deal the partners actually struck. The agreement is also what banks and investors expect to see.

A limited partnership needs an Employer Identification Number. Because a partnership files its own federal return on Form 1065, the EIN is not optional the way it sometimes is for a single-member LLC — the partnership is a distinct tax filer and needs its own federal identifier.

Why the EIN matters here

• It is required to file the partnership's Form 1065 and to issue Schedule K-1s to partners.
• Banks require it to open the partnership's account.
• It keeps any individual partner's Social Security number off business paperwork.

How to apply

The quickest route is the IRS EIN Assistant at IRS.gov. The application takes about ten minutes and issues the number immediately, so you can use it the same day. The responsible party completing the application online needs a U.S. Social Security number or ITIN; applicants without one file Form SS-4 by fax or mail instead.

A limited partnership is a separate legal and tax entity, and its finances have to be kept separate from the partners' personal money. Commingling funds undermines the structure and, for the general partner, muddies the very liability lines the arrangement is built around.

What banks typically ask for

• The recorded Certificate of Limited Partnership from the Secretary of State
• The IRS EIN confirmation
• The limited partnership agreement, especially to confirm who has authority to bind the partnership
• Government-issued ID for the general partners or authorized signers

Set up bookkeeping from day one that tracks each partner's capital account, because those balances feed directly into the K-1 allocations at tax time. Getting this right early saves a painful reconstruction later.

Arizona keeps ongoing compliance light for limited partnerships, but light is not the same as nothing.

No annual report — but keep the record accurate

Arizona does not require limited partnerships to file an annual report with the Secretary of State, so there is no recurring state report or annual state fee to track. The flip side is that nothing prompts you to update stale information. If a general partner changes or the statutory agent moves or resigns, you have to file an amendment or a change with the Secretary of State to keep the public certificate accurate.

Taxes

The partnership files Form 1065 federally each year and issues K-1s to the partners, who report their shares individually. Arizona follows pass-through treatment, and the partnership meets the state's partnership filing requirements. If the business collects on taxable sales, register for a transaction privilege tax license with the Arizona Department of Revenue.

Licenses and local rules

Arizona has no single statewide general business license, but many professions and municipalities impose their own licensing. Those obligations are separate from your Secretary of State registration and run on their own schedules.