How to Start a Washington Limited Liability Partnership — Step by Step

Your LLP's name has to be distinguishable from every other business name already on file with the Washington Secretary of State. Distinguishable is a legal test, not a matter of taste — two names that differ only by punctuation, spacing, or a word like "the" may still be treated as the same.

Run your proposed name and its close variations through the search inside CCFS. Search broadly: try the singular and plural, alternate spellings, and abbreviations. If a match turns up, refine the name before you file, because a conflict will bounce your registration and cost you days.

Naming rules for a Washington LLP

• The name must include a designator identifying it as a limited liability partnership — commonly "Limited Liability Partnership," "L.L.P.," or "LLP."
• It must be distinguishable from all other entity names registered in Washington.
• It cannot imply a purpose the partnership is not authorized to pursue, and certain restricted words (for example, terms suggesting banking or insurance) may require regulatory approval.

Reserving a name

If you have settled on a name but are not ready to register the LLP, Washington lets you reserve it for a limited period through the Secretary of State. Reservation holds the name — it does not create the LLP. For most partnerships that are ready to file, reserving separately is an unnecessary step.

Before you file, decide who your registered agent will be, because their name and Washington street address go into the registration and they must consent to serve.

Washington requires every LLP to keep a registered agent — the person or company that receives lawsuits, subpoenas, and official state mail on the partnership's behalf — throughout the life of the entity.

Who can serve

• A partner or another individual: Any Washington resident with a physical street address in the state who is reliably available during business hours. Their address becomes part of the public CCFS record.
• A commercial registered agent service: A firm cleared to serve in the agent role within Washington. This keeps a professional address in the public record instead of a partner's home and guarantees someone is present to accept documents even when the partners are in court, traveling, or between offices.

Consent matters

Washington requires the registered agent to consent to the appointment. If you name a person, make sure they have actually agreed. A commercial service handles the consent as part of onboarding.

This is the filing that turns your general partnership into a registered limited liability partnership on Washington's records. You file online through CCFS, submitting the application to register as a limited liability partnership.

Online filings generally process within a few business days. Paper filings by mail take substantially longer, and expedited handling is available for an added fee when timing is critical. Once processed, the LLP appears in the CCFS search, and Washington assigns it a Unified Business Identifier (UBI) number that you will use across state agencies.

What the registration asks for

• Partnership name with the required LLP designator
• Principal office address — the main business address
• Registered agent name and Washington street address, plus the agent's consent
• Number of partners as of the filing date
• Signature of a partner or authorized person

What you do not have to disclose

The registration is a short document. You do not attach your partnership agreement, list every partner's capital account, or reveal the economic split among the partners. Those internal details live in your partnership agreement, which stays private and is never filed with the state.

The partnership agreement is the LLP's internal governing document. Washington does not require you to file it, and it never becomes public — but every LLP should have one in writing before it starts doing business.

Without a written agreement, the default rules of Washington's partnership act fill every gap, and those defaults rarely match what the partners actually intended about money, control, and exits.

What a solid partnership agreement covers

• Capital contributions: what each partner put in and what future contributions may be required
• Profit and loss allocation: how profits and losses are divided, which need not be equal
• Draws and distributions: when and how partners take money out
• Management and voting: who decides what, and which decisions need unanimity versus a majority
• Admitting and removing partners: how a new partner joins and how a departing partner is bought out
• Dissociation and dissolution: what happens when a partner dies, retires, or leaves, and how the LLP winds down
• Dispute resolution: how the partners resolve disagreements before they reach a courtroom

For a professional practice, the agreement is where you also address how the liability shield interacts with each partner's professional responsibility. This is the document to have a lawyer help draft, because the economic and governance terms are where partnerships most often fracture.

The IRS hands out an Employer Identification Number — a nine-digit federal tax ID — free of charge. A multi-partner business needs one — an LLP files a partnership tax return (Form 1065) and passes income through to the partners, and that return requires an EIN.

Why your LLP needs one

• It files a partnership return, which requires an EIN
• Banks require it to open a business account
• It is needed to hire employees and handle payroll
• It keeps the partners' Social Security numbers off business paperwork

How to apply

Apply online through the IRS EIN Assistant at IRS.gov. The application takes about ten minutes and issues the number immediately, so you can print the confirmation and use it the same day. The online application requires a Social Security number or ITIN for the responsible party; applicants without one apply by fax or mail using Form SS-4.

Washington does not have a personal income tax, but it does impose a Business & Occupation (B&O) tax on gross receipts, administered by the Department of Revenue. Most businesses must register through the state's Business Licensing Service to obtain a business license and their B&O tax account before they begin operating.

Business licensing

Register with the Department of Revenue through the Business Licensing Service. Depending on your city and industry, you may also need city endorsements or professional licenses layered onto the state registration. Confirm your specific obligations with your city and your licensing board.

Open a business bank account

Keeping partnership money strictly separate from the partners' personal money is essential to preserving the LLP's integrity. Most banks ask for the filed LLP registration, the EIN confirmation, and often the partnership agreement, plus ID for the authorized signers. Community banks and online business banks frequently move faster on new partnerships than large national chains.

Most of the work is front-loaded into registration. After that, compliance is a short recurring list.

Annual report

File an annual report with the Secretary of State each year to keep your agent, principal office, and partner information current. It is not a financial disclosure. Letting it lapse jeopardizes the LLP's active status — and with it, the liability shield.

B&O tax and other state filings

File and pay the Business & Occupation tax with the Department of Revenue on the schedule the state assigns you. If you sell taxable goods or services, you may also collect and remit sales tax.

Registered agent maintenance

If your agent changes address, resigns, or you switch providers, update the record with the Secretary of State promptly. A stale agent address leaves the LLP out of compliance even when everything else is current.