Washington LLC Formation: A Founder's Guide
A Washington LLC is governed by Chapter 25.15 RCW, the Washington Limited Liability Company Act. This guide walks through when to form a Washington LLC, what goes into the certificate of formation, how the operating agreement interacts with statutory defaults, and the ongoing annual report and business licensing obligations. It is an educational resource, not Washington legal advice.
Quick answer
If I am forming a single operating entity that will be doing business inside Washington (signing contracts, hiring Washington employees, holding real estate, or selling regulated services to Washington residents), I generally form a Washington domestic LLC and file a certificate of formation with the Washington Secretary of State under RCW 25.15.071. If the entity is already formed in another state (Delaware, California, Wyoming) and is simply doing business in Washington, I register that entity as a foreign LLC under Chapter 25.15 RCW, Article XII instead.
When to form a Washington LLC
The most common reasons I see founders choose a Washington LLC over a corporation:
- The business will have one to five members and prefers pass-through tax treatment without S-corp election complexity.
- Members want flexible profit and loss allocations that do not follow ownership percentages strictly.
- The business is service-based, professional, or holds real estate, and is not optimizing for venture capital investment (most VCs prefer Delaware C-corps).
- Founders want a simpler annual maintenance cadence than a corporation's board minutes and share ledger.
Domestic vs foreign LLC
Certificate of formation under Chapter 25.15 RCW
The certificate of formation is the public charter document. At a minimum, the statute requires:
- The name of the LLC, which must contain a permitted designator (LLC, L.L.C., or "Limited Liability Company") and be distinguishable on the records of the Secretary of State.
- The address of the LLC's registered office in Washington and the name of its registered agent at that office.
- The mailing address of the LLC.
- The name and address of each person executing the certificate.
- If formed for a limited duration, the latest date of dissolution.
The certificate becomes effective on filing unless a delayed effective date is specified. The current statutory framework is in Chapter 25.15 RCW; review the official text at app.leg.wa.gov/rcw/default.aspx?cite=25.15 before filing.
Operating agreement (limited liability company agreement)
The operating agreement, called the "limited liability company agreement" in RCW 25.15.018, governs the internal relations of the LLC: rights and duties of members and managers, voting, allocations, distributions, transfers, withdrawal, and dissolution. The statute is highly flexible, but it is not absolute. Several categories of provisions cannot be eliminated or limited by agreement, including duties to avoid intentional misconduct and knowing violations of law, the implied contractual duty of good faith and fair dealing, and certain limits tied to improper distributions under RCW 25.15.231. I cover this in depth on the Washington Operating Agreement Guide.
Member-managed vs manager-managed
By default, a Washington LLC is member-managed. Every member has authority to bind the company. That can work for two founders who actually run the business together. It does not work when there is a passive investor.
A manager-managed LLC concentrates management authority in one or more managers (who may or may not be members). I usually recommend manager-managed for any LLC with a non-operational member, for any LLC with more than three members, and for any LLC that holds passive assets like real estate.
The election is made in the certificate of formation and confirmed in the operating agreement. Switching later requires both an amendment and updated public filings.
Annual report and UBI
Every Washington LLC must file an initial annual report and then an annual report each year thereafter. The Washington Secretary of State publishes the rule plainly: the annual report is "due by the last day of the month in which the business was originally formed or registered." See the Secretary of State's annual reports compliance page.
When the certificate of formation is filed, the entity receives a Unified Business Identifier (UBI), a nine-digit number that follows the LLC across state agencies (SOS, Department of Revenue, Employment Security, Labor and Industries). Keep the UBI; it is what every other Washington agency will ask for.
Washington DOR business license
Forming the LLC at the Secretary of State does not, by itself, give the entity the legal right to do business in Washington. Most Washington businesses also need a business license from the Department of Revenue's Business Licensing Service. In my experience the practical timeline runs roughly:
- About ten business days for a baseline state business license to be processed.
- An additional two to three weeks for city-specific endorsements (Seattle, Bellevue, Tacoma, Spokane, and similar local jurisdictions each have their own endorsement process).
Plan for that timeline before signing leases, hiring employees, or onboarding Washington customers who expect to receive a valid invoice.
Washington legal leverage
Chapter 25.15 RCW is intentionally a default rules statute. The legislature wrote it so that founders can customize most internal rules through their operating agreement. That flexibility is the legal leverage point: a thoughtful operating agreement is the difference between using the statutory defaults (which were not written for your specific cap table) and using rules tailored to your actual capital, voting, and exit expectations. If the agreement is silent, the statute fills in the blank, and the statutory blank-fill is rarely what founders would have chosen if asked.
When attorney drafting matters
Honestly, a simple single-member Washington LLC with no outside capital and a generic service-business purpose can usually be formed cleanly using the Secretary of State's web filing and a vetted form operating agreement. That is not the population I worry about.
I worry about LLCs where any of these are true:
- Two or more founders with different capital, sweat-equity, or time commitments.
- One member is a passive investor and one is operational.
- The LLC will hold material IP that must be assigned in from founders.
- There is a vesting expectation, a buyout trigger, or any kind of equity earned over time.
- The LLC will have non-pro-rata economic rights, preferred distributions, or tax distribution mechanics.
- There is a real risk of future founder dispute or deadlock.
The cost of a custom operating agreement is small compared to the cost of unwinding a founder dispute under generic statutory defaults.
Practical formation checklist
- Confirm the LLC name is available on the Secretary of State's business search.
- Designate a Washington registered agent with a physical Washington street address.
- File the certificate of formation with the Secretary of State; capture the UBI.
- Adopt a written operating agreement signed by all members.
- Apply for the federal EIN.
- Apply for the Washington state business license and any city endorsements.
- Open the operating bank account in the LLC's name with the EIN and certified copy of the certificate.
- Calendar the annual report due date (last day of the formation month).
- If members contributed IP, sign IP assignment agreements; if employees will be hired, prepare an employee handbook and IP-and-confidentiality agreements.
Related California comparison
Founders operating in both states should also review my California LLC formation resources, including the California incorporation hub and the California LLC operating agreement generator. A side-by-side California vs Washington comparison is coming on the Washington Business Law hub.
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