How to Do a Washington LLC Name Search (2026 Guide)
Last Updated April 30, 2026 by the LLCForge Editorial Team. Verified against current state filing data and official Secretary of State sources.
Before you file a Certificate of Formation in Washington, you need a name that’s actually available. The Washington Secretary of State runs a free business name lookup at ccfs.sos.wa.gov. Standard filings post within 5 to 7 business days, but your name isn’t locked in until that filing is approved. Pick a taken name and your formation gets rejected, costing you the filing fee and weeks of delay. Here’s how to search the right way.
Search URL: https://ccfs.sos.wa.gov/ (Corporations and Charities Filing System)
Name reservation fee: $30 standard; add $100 for expedited or $150 for same-day service
Reservation period: 180 days, non-renewable
LLC designator: Must include “Limited Liability Company,” “LLC,” or “L.L.C.”
Distinguishability rule: Your name must be distinguishable on the record from any active Washington business entity
How to Search Washington LLC Names: Step-by-Step
Step 1: Open the Washington Corporations and Charities Filing System
Go to ccfs.sos.wa.gov. This is the official portal run by the Washington Secretary of State. You don’t need an account to search. Click “Business Search” near the top of the homepage, or look for the search bar on the landing page.
Step 2: Enter Your Proposed Name
Type the core part of your business name into the search field. Skip the “LLC” or “Limited Liability Company” suffix on your first pass. If you want to call your company “Cascade Roofing LLC,” search “Cascade Roofing” first. That pulls up corporations, LPs, and other LLCs that share the same root, which the state will flag as too similar.
Use the “Starts With” or “Contains” filter depending on how broad you want the results. “Contains” is better for catching close matches.
Step 3: Review the Results Carefully
Look at the status column. Names listed as “Active” or “Existing” are off limits. Names marked “Inactive,” “Dissolved,” or “Terminated” may be available, but Washington doesn’t release dissolved names automatically. Some sit in protected status for years. If you see your exact match in dissolved status, call the SOS at (360) 725-0377 to confirm before you commit.
Step 4: Run Variations
Test plurals, abbreviations, and word swaps. Washington’s distinguishability standard rejects names that differ only by punctuation, articles (“the,” “a,” “an”), or entity type. “Pacific Builders LLC” is not distinguishable from “Pacific Builder Inc.” in this state. Search singular and plural forms, and try removing or adding common words.
Step 5: Check Federal Trademarks
State availability isn’t the same as legal clearance. Run your name through the USPTO trademark database. A Washington filing won’t protect you if someone else holds a federal mark in your industry, and you could be forced to rebrand later.
Step 6: Confirm the Domain and Social Handles
Check that the .com is available, or at least a workable variant. Run the name through Instagram, LinkedIn, and any platform your customers use. A name that’s free in Washington but unusable online isn’t really free.
Washington LLC Naming Rules
Required Designator
Every Washington LLC name must end with one of these: “Limited Liability Company,” “Limited Liability Co.,” “LLC,” or “L.L.C.” The state will reject your Certificate of Formation if you leave the designator off. Capitalization and spacing don’t matter, but the designator itself does.
Distinguishability on the Record
RCW 23.95.305 requires your name to be distinguishable from every active business entity registered in Washington. That includes corporations, LPs, LLPs, nonprofits, and reserved names. The Secretary of State doesn’t consider these differences enough:
- Adding or removing “the,” “a,” or “an”
- Changing punctuation, spacing, or capitalization
- Switching between singular and plural
- Swapping entity types (LLC vs. Inc. vs. Corp.)
- Adding the word “company,” “co.,” “corporation,” or “incorporated”
Prohibited Words
You can’t use words that suggest your LLC is a government agency. “FBI,” “Treasury,” “State Department,” and similar terms are blocked. Words implying you’re a different entity type, like “Corporation,” “Incorporated,” or “Inc.,” are also off limits for an LLC.
Restricted Words Requiring Approval
Some words trigger extra review or require licensing before the state will accept your filing:
- Bank, banking, trust, credit union: Need approval from the Washington Department of Financial Institutions
- Insurance, insurer, assurance: Need clearance from the Office of the Insurance Commissioner
- Engineer, engineering, architect: Require a licensed professional involved in the entity
- Attorney, lawyer, law office: Restricted to entities owned by licensed Washington attorneys
- University, college, academy: May require Higher Education Coordinating Board sign-off
What If Your Washington LLC Name Is Already Taken?
Try Variations First
Add a geographic identifier (“Seattle,” “Puget Sound,” “Cascade”), a descriptive word that fits your business (“Build,” “Group,” “Studio”), or restructure the name entirely. The goal is a name that’s genuinely different on the record, not a workaround that the SOS will reject.
Reserve the Name
If you’ve found an available name but aren’t ready to file the Certificate of Formation, reserve it. File a Name Reservation through the CCFS portal. The fee is $30 standard, or pay an extra $100 for expedited or $150 for same-day handling. Reservations last 180 days and can’t be renewed. If you don’t form the LLC in that window, the name goes back into circulation.
Use a DBA (Trade Name)
Washington calls assumed names “trade names.” Your LLC’s legal name on file might be “Olympic Holdings LLC,” but you can register the trade name “Olympic Coffee Roasters” through the Department of Revenue’s Business Licensing Service for $5 per name. This lets you operate under a customer-facing brand without changing the LLC’s official name.
Trademark Considerations
Even an available state name can be infringing. If a federally registered trademark covers your name in your industry, the trademark holder can force you to stop using it, regardless of what Washington says. Run a USPTO search and consider filing your own trademark once you’re sure the name is clear.
After You Confirm Your Washington LLC Name
Once your name clears, file the Certificate of Formation with the Washington Secretary of State. The standard filing fee is $200 online or $180 by mail. After that, you’ll need an EIN from the IRS, a registered agent in Washington, and an operating agreement to keep your liability shield intact.
Full walkthroughs: Washington LLC formation guide, step-by-step Washington LLC filing, Washington registered agent requirements, and Washington operating agreement template.
The DIY Route
- You file the formation paperwork yourself
- You serve as your own registered agent (your name and address become public record)
- You file the EIN with the IRS
- You write your own operating agreement
- You handle ongoing state compliance, including annual reports and registered agent renewals
Workable if you have time, attention to detail, and don’t mind your home address being public.
With Northwest Registered Agent
- They file your formation paperwork
- They serve as your registered agent (their address public, not yours)
- They can assist with EIN filing as an optional add-on
- Same-day provider submission (state approval time varies)
- Your privacy protected throughout
The simpler path. Focus on building your business while they handle the paperwork.
Frequently Asked Questions
How long does it take Washington to confirm name availability?
The CCFS search is instant. But “available right now” doesn’t mean “yours.” Another filer can submit a Certificate of Formation with the same name minutes after you check. The name only locks when you file or reserve it.
How long does a Washington LLC name reservation last?
180 days, and you can’t renew it. If you reserve a name and don’t form the LLC within six months, the name returns to the public pool. Plan to file before that deadline.
Can my Washington LLC name be different from my DBA?
Yes. The legal name on your Certificate of Formation can be a holding-style name, and you can register one or more trade names through the Business Licensing Service for the brands you actually use with customers. Each trade name costs $5.
Does my LLC name have to match my domain?
No, and many businesses use a shorter domain than their full legal name. But if a competitor owns the .com, your marketing gets harder. Check domain availability before you commit.
What makes a name “distinguishable” in Washington?
The name has to differ from existing entities by more than entity type, punctuation, articles, or singular/plural form. “Rainier Construction LLC” and “Rainier Constructions Inc.” are not distinguishable. Add a real word, change the core noun, or restructure the name.
Can I use a name that belonged to a dissolved Washington LLC?
Sometimes. Dissolved names aren’t automatically released. Some stay protected for years after dissolution, and reinstatement rights can keep names locked. Call the Secretary of State at (360) 725-0377 to check the status before filing.
This content is for informational purposes only and does not constitute legal or tax advice. Always consult a qualified professional for guidance specific to your situation.