How to Start a Washington Limited Partnership — Step by Step

Your LP's name has to do two things: signal that it is a limited partnership and be distinguishable from every other entity already registered with the Washington Secretary of State.

Naming rules for a Washington LP

• The name must contain the words "limited partnership" or the abbreviation "L.P." or "LP." A limited partnership cannot pass itself off as a corporation or LLC through its name.
• It must be distinguishable from existing entity names on file. Small differences — punctuation, "the," "and," or a plural — may not be enough to make a name distinct in the state's eyes.
• It cannot use words implying a purpose the LP is not authorized for, such as "bank," "trust," or "insurance," without approval from the relevant regulator.

Check availability first

Search your proposed name and close variants in the Corporations and Charities Filing System. If a similar name is already registered, the state can reject your certificate, which costs you time. Searching before you file is free and takes minutes.

Reserving a name

If you are not ready to file but want to hold the name, Washington lets you reserve an available name for a set period for a small state fee. Reservation does not create the LP — it just parks the name while you prepare the rest of the filing.

Before you can file, you need a registered agent chosen and willing to serve, because the agent's name and Washington address go on the Certificate of Limited Partnership and the agent must consent to the role.

The registered agent is the LP's official recipient for service of process — lawsuits, subpoenas — and for state correspondence. Washington requires a physical street address in the state; a P.O. box alone does not qualify, because the point is that documents can be hand-delivered during business hours.

Who can be the registered agent

• A general partner or another individual with a physical Washington street address who is reliably available during business hours. That address becomes part of the public record.
• A commercial registered agent service authorized in Washington. This keeps a professional address on the public filing instead of a partner's home, and guarantees someone is present to receive documents even when the partners travel.

For an LP, using a commercial agent is often attractive because the general partner's personal information would otherwise be exposed alongside the general-partner disclosures already required on the certificate.

The Certificate of Limited Partnership is the document that legally brings your LP into existence. You file it online through the Corporations and Charities Filing System, operated by the Secretary of State's Corporations and Charities Division. The state fee is shown on the cost card on this site; do not pay attention to third-party sites quoting old numbers.

What goes on the certificate

• Partnership name with the required LP designator
• Registered agent name and physical Washington address, with the agent's consent
• Principal office address of the partnership
• Name and address of each general partner — the parties who manage and bear liability
• Signature of a general partner executing the filing

Note what is not required: you do not have to list your limited partners publicly, disclose the size of their contributions, or attach your partnership agreement. Limited partners' privacy is one of the practical advantages of the structure.

Processing and the UBI number

Online filings through CCFS typically process within a few business days, and expedited handling is available for an added fee if you are up against a deadline. Once processed, the LP exists, appears in the state's records, and is assigned a Unified Business Identifier (UBI) — the number that ties together your Secretary of State registration, Department of Revenue account, and business licensing.

Washington asks new entities to file an Initial Report shortly after formation, confirming the registered agent and governor (general partner) information. You can often submit it together with the certificate; if you do not, the state expects it within the deadline it sets, and there is a modest fee if filed separately. Filing it promptly avoids a compliance flag right out of the gate.

Separately, if your LP will conduct taxable business in Washington, you register through the Department of Revenue's Business Licensing Service to obtain a state business license and any city or state endorsements your activity requires. This is where the B&O tax account gets set up. Formation with the Secretary of State and licensing with the Department of Revenue are two different steps, and skipping the second is a common mistake for new partnerships.

An Employer Identification Number is the federal tax ID for your partnership. A limited partnership essentially always needs one: the IRS treats a multi-owner partnership as a filer of Form 1065, and you cannot open a business bank account without an EIN.

When your LP needs an EIN

• Always, in practice, because an LP has at least two owners (a general and a limited partner) and must file a partnership return
• To open a business bank account
• To hire employees
• To set up payroll and state tax accounts

How to apply

Apply free through the IRS EIN Assistant at irs.gov. The online application takes about ten minutes and issues the number immediately — you can use it the same day. A responsible party with a U.S. Social Security number or ITIN completes the online form; applicants without one file Form SS-4 by fax or mail. Never pay a third party for the number itself; the IRS issues it at no cost.

This is the internal contract among the partners, and it is the most important document you will create that the state never sees. Draft and sign it before you take in capital or begin operating.

What the agreement should cover

• Capital contributions — what each general and limited partner puts in, and any obligation to contribute more later
• Profit and loss allocation — how gains and losses are split; this need not match contribution percentages
• Distributions — when and how cash goes out, and in what priority
• General partner authority — the scope of management power and any decisions that require limited-partner consent
• Limited partner rights and limits — what limited partners may vote on or approve without crossing into "management" and jeopardizing their liability shield
• Transfers — how a partnership interest can be sold or assigned, and who has approval or first-refusal rights
• Dissolution and buyout — what triggers winding up, and how a departing partner is bought out

Because Washington's default rules under RCW 25.10 fill any gaps you leave, a thorough agreement is how you keep control over your own arrangement rather than inheriting statutory defaults.

Keeping partnership money separate from personal money is what preserves the limited partners' liability protection and keeps the general partner's accounting clean. Commingling funds is one of the fastest ways to invite trouble.

What banks typically want to open an LP account

• The filed Certificate of Limited Partnership
• The IRS EIN confirmation
• The limited partnership agreement (many banks ask for it)
• Government ID for the authorized signers

Ongoing compliance at a glance

• Annual report with the Secretary of State, due each year around your formation anniversary, updating agent and partner information
• Registered agent kept current — file a change if the agent moves or resigns
• B&O tax and any other Department of Revenue filings on their own schedule
• Federal partnership return (Form 1065) with K-1s to each partner

We cover each of these in more depth on the dedicated pages, but getting them on your calendar at formation is what keeps the LP in good standing year after year.