Washington business entity search
Washington does not count a plural, an abbreviation, a punctuation mark or an added "the" as a difference between two business names.
Check a name against Washington's naming rules
Example: a check of "Blue Heron Bakery LLC" against Washington's rules.
- Ends with "L.L.C.", an ending Washington lists for an LLC.
- No ending from Washington's list for a corporation was found at the end of this name.
Get the matching domain name
Type a business name to check its .com, .net, .org and .us.
"Not registered" is the registry's answer at this moment. It is not a promise that the name can be bought at the standard price, since some unregistered names are reserved or sold at a premium. The buttons open Spaceship, a domain registrar, where the price is shown.
This checks the ending and the restricted words Washington publishes. It does not tell you whether another company already holds the name. Only the state's own search can show that.
A private website, not a government site. Every state entry links to that state's official search.
Washington Secretary of State's own search
- Run by
- Washington Secretary of State
- Called
- Corporation Search
- Search by
- business name, UBI number
The state's search is the record that counts. State Business Entity Search is not a government site.
The Corporations & Charities Division of the Washington Secretary of State keeps the register and runs the Corporation Search, which needs no login.
Washington filing fees for a new business name
| Filing | State fee | Details |
|---|---|---|
| Form an LLC in Washington | $180 | Certificate of Formation. Source: Washington Secretary of State, LLC and professional LLC filing resource page. |
| Form a corporation in Washington | $180 | Articles of Incorporation. Source: Washington Secretary of State, fee schedules and priority services. |
| Reserve a name in Washington | $30 | Held for 180 days. Source: Washington Secretary of State, fee schedules and priority services. |
| Annual report for a Washington LLC | $70 | Every year. By the business entity's expiration date, the last day of the month in which it was first formed or registered. Source: Washington Secretary of State, fee schedules and priority services. |
Name endings Washington accepts
For an LLC (Revised Code of Washington 23.95.305)
For a corporation (Revised Code of Washington 23.95.305)
Washington's Corporation Search
The Corporation Search sits inside the Corporations and Charities Filing System, which the state shortens to CCFS. You type a business name or a UBI number, pick the name from the list that appears, and open its public record. Public corporation records can be found without a login.
The state's own tip is to avoid plurals when entering a name, because singular names give more consistent results. A separate Advanced Corporation Search lists many businesses at once. It filters by type, status, dates, registered agent or governor. It offers a "contains" choice for names and exports the list to a CSV file.
The online LLC filing has its own Look Up button for a proposed name. The state warns that name availability is subject to its final review, and the system does not account for pending submissions.
What makes a Washington name distinguishable
Revised Code of Washington (RCW) 23.95.300 requires a domestic entity's name to be distinguishable on the Secretary of State's records. The comparison covers existing domestic entities that are not administratively dissolved, registered foreign entities, reserved names and registered names.
The statute lists four changes that do not create a difference:
- a different entity-type word or abbreviation, such as LLC against Inc.
- adding or dropping "the" or "and"
- punctuation, capitalization, special characters or symbols
- an abbreviation or the plural form of a word
A non-distinguishable name may still be used if the entity files a certified copy of a final court judgment giving it that right. A trademark in the Secretary of State's records does not block a matching business name.
Words Washington restricts
RCW 23.95.305 bars "Cooperative", "partnership", "corporation" and "incorporated" from an LLC name, along with Corp., Ltd., Inc., LP and LLP style abbreviations. The state's online LLC formation instructions list a different set: "Bank", "banking", "banker", "trust" and "cooperative". RCW 23.95.305 applies that second set to business corporations.
Reserving a Washington name
The fee schedule puts Reservation of Name at $30. Under RCW 23.95.310, the name is held for the applicant's exclusive use for 180 days. A reservation cannot be renewed, and the filing goes in by mail or in person.
What Washington charges after formation
The LLC Certificate of Formation costs $180, according to the Secretary of State. The annual report costs $70. It is due by the business's expiration date, which is the last day of the month the business was first formed or registered. It can be filed up to 180 days early.
A late report adds a $25 delinquency fee. On the fee schedule, the annual report with that delinquency fee is $95. A new LLC's initial report is free when filed with the formation document. Compare these figures with the LLC cost calculator.
Expedited service costs $100 per entity and is generally processed within three working days. Trade names are not recorded by the Secretary of State, so doing business as names go elsewhere. The fictitious business name guide explains how they work across states.
Checking and claiming a name in Washington
- Search the name in singular form in the Corporation Search, and note every matching entity.
- Compare it with the four differences that RCW 23.95.300 does not accept. Changing only one of them will not separate it from another name.
- Add an ending from the endings each state accepts, such as "limited liability company" or LLC.
- File the $30 name reservation by mail or in person if the formation filing must wait. The hold lasts 180 days.
- File the $180 Certificate of Formation, then put the expiration date and the $70 annual report on the calendar.
Washington name search questions
Does a Washington trademark registration block another business from using the name?
No. Trademarks are recorded separately from corporate names. A registered trademark would not prohibit another entity from filing a business under the same name.
Where is a Washington trade name registered?
Not with the Secretary of State, which does not record trade names. Tradenames, also called doing business as names, are registered at Business Licensing Services within the Department of Revenue.
How long do Washington records stay in the online search?
Records of entities inactive for more than 10 years are no longer in the online system. The state points to the Washington State Archives Digital Archives for historical records.
Can a Washington name reservation be renewed?
No. The state says the reservation expires after 180 days and cannot be renewed. The $30 filing goes in by mail or in person, because it is not available online.
What happens when a Washington LLC files its annual report late?
A delinquency fee of $25 is due for all business types except nonprofits, according to the state. On its fee schedule, the annual report with the delinquency fee is $95.
After the Washington name check
- LLC cost calculatorWashington filing and report fees added up
- Business name rules by stateWashington's endings beside other states
- Kentucky business entity searchKentucky Secretary of State
- Alabama business entity searchAlabama Secretary of State
- Mississippi business entity searchMississippi Secretary of State
- How to protect a business nameWhat an entity name, a trademark, a DBA and a domain each protect, and what each leaves open.
- Business name change with the IRSWhich IRS form box or letter covers a new business name, who signs it and when an EIN stays the same.
9 official Washington sources
- Washington Secretary of State, online filing system tools and resources, retrieved November 13, 2026.
- Washington Secretary of State, start a domestic LLC online, retrieved November 13, 2026.
- Washington Secretary of State, LLC and professional LLC filing resource page, retrieved November 13, 2026.
- Washington Secretary of State, fee schedules and priority services, retrieved November 13, 2026.
- Washington Secretary of State, trademarks and trade names, retrieved November 13, 2026.
- Washington Secretary of State, Corporations and Charities Filing System, retrieved November 13, 2026.
- Revised Code of Washington 23.95.300, permitted names, retrieved November 13, 2026.
- Revised Code of Washington 23.95.305, name requirements for certain types of entities, retrieved November 13, 2026.
- Revised Code of Washington 23.95.310, reservation of name, retrieved November 13, 2026.