State tax guides
Washington LLC & corporation registration and tax requirements
A general guide to forming, registering and keeping a company compliant in Washington. Businesses are registered with the Secretary of State. Washington has no personal or corporate income tax on wages and business profits, but the B&O tax applies to gross receipts—even for businesses that are not profitable.
Single-member LLCs in Washington
A single-member LLC is registered with the Secretary of State by filing articles of organization. For federal tax purposes it is usually a disregarded entity, and its ongoing Washington obligations typically include: annual report with business license renewal. Washington does not tax individual wages or pass-through business profit, so LLC and S corporation owners usually have no Washington personal income tax return for that income.
Multi-member LLCs in Washington
A multi-member LLC is generally taxed as a partnership and files a federal Form 1065 with K-1s for each member. In Washington, it keeps the same registration and report obligations, and the state may require a partnership return or withholding for nonresident members. Business-level taxes to watch: No corporate income tax; Business & Occupation (B&O) tax on gross receipts.
Corporations in Washington
A corporation files articles of incorporation with the Secretary of State, appoints directors and officers, and keeps its Washington registration current. No corporate income tax; Business & Occupation (B&O) tax on gross receipts. Corporations also file federal Form 1120 and, when doing business in Washington, a Washington corporate return where one is required.
S corporations in Washington
An S corporation is a federal tax election (Form 2553), not a separate entity type. Not every state treats S corporations the same way—in Washington, review how the state taxes S corporation income and whether entity-level taxes or fees still apply. Nonresident aliens cannot be S corporation shareholders, so foreign owners usually use an LLC or C corporation instead.
Foreign-owned U.S. LLCs and corporations in Washington
Foreign individuals and companies can own an LLC or corporation in Washington. State requirements are generally the same as for U.S. owners, but federal rules add filings such as Form 5472 with a pro forma Form 1120 for foreign-owned single-member LLCs, and possible withholding on income allocated to foreign partners. Chirino USA helps foreign owners keep both the Washington filings and the IRS filings in order.
Companies formed in another state that do business in Washington
An LLC or corporation formed elsewhere—such as in Delaware, Wyoming or Florida—that has employees, an office, property or regular operations in Washington usually must register as a "foreign" entity with the Secretary of State (foreign qualification). Once registered, it generally follows Washington's report and tax rules as well as those of its home state.
Registered agent requirements
Every LLC and corporation registered in Washington must keep a registered agent with a physical address in the state to receive legal and state notices. Owners who live abroad or in another state typically use a commercial registered agent service.
General filing deadlines
Annual or periodic report: Annual report with business license renewal. State income or franchise tax returns generally follow federal due dates or shortly after, and extensions for state returns do not always extend the time to pay. Missing state filings can lead to penalties, loss of good standing and eventual administrative dissolution.
Multi-state business considerations
Companies that sell, hire or hold property in more than one state may have to register and file in each of them. Income is usually apportioned among states, and sales tax registration can be triggered separately from income tax. We review where your company is "doing business" so you file in Washington and other states only where required.
This guide is general information and not legal or tax advice. State rules, fees and deadlines change; we confirm current requirements for your situation before filing.
Washington LLC and corporation FAQs
Do I need an accountant for my Washington LLC?
Not always, but a professional helps make sure your Washington registration, annual reports and state taxes are coordinated with your federal returns. Chirino USA assists single-member and multi-member LLCs, corporations and S corporations with Washington compliance.
Does my LLC need to register in Washington if it was formed in another state?
If your company has a physical presence, employees or regular business activity in Washington, it usually needs foreign qualification with the Secretary of State. Simply owning a company formed elsewhere is not enough by itself; it depends on your activities.
What state taxes apply to a foreign-owned LLC in Washington?
No corporate income tax; Business & Occupation (B&O) tax on gross receipts. Foreign owners also have federal obligations such as Form 5472 for single-member LLCs.
What annual filings does a Washington company have?
Annual report with business license renewal. Most companies also have federal and, where applicable, state income tax filings each year.
All 50 state guides
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Need help with Washington state filings?
Chirino USA Accountants & Advisors assists U.S. and international clients with Washington registration and tax compliance for LLCs, corporations, S corporations and foreign-owned U.S. businesses.