Washington does not use the term DBA in its own forms. The state calls it a trade name, and the registration runs through the Department of Revenue rather than a county clerk, which surprises owners who have filed in other states.

If you plan to register a DBA in Washington, this checklist covers what the state requires, what to check before you file, and what a trade name will and will not do for your business.

What a Trade Name Means in Washington

A trade name is any name your business uses that differs from its legal name. For a sole proprietor, the legal name is your full first and last name. For an LLC or corporation, it is the exact name registered with the Secretary of State.

Washington’s trade name law is in chapter 19.80 RCW. The Department of Revenue’s Business Licensing Service handles registration as part of the Business License Application.

Checklist Item 1: Confirm You Need One

According to the Department of Revenue, you must register a trade name if you are:

• A sole proprietor or partnership using a name other than the owners’ full legal names
• A corporation, LLC, or limited partnership operating under a name different from the one registered with the Secretary of State

Example: Maria Lopez selling candles as “Cascade Candle Co.” needs to register a DBA in Washington. So does “Northline Consulting LLC” running a second brand called “Northline Payroll.” If you only use your exact legal name, you do not.

Checklist Item 2: Run a Business Name Search in Washington

Before you register a DBA in Washington, check whether the name is already in use. A thorough business name search Washington owners can run covers three places:

• Department of Revenue business lookup: shows names attached to existing business licenses
• Secretary of State corporations search: shows registered LLC, corporation, and partnership names
• USPTO trademark search: shows federally registered and pending marks

The state does not block duplicate trade names the way it blocks duplicate LLC names, but a name another company already relies on can invite a dispute.

Checklist Item 3: Gather Your Information

Have these ready before you start:

• Your Unified Business Identifier (UBI) number, if you already hold a Washington business license
• The legal name of the owner or entity
• The exact trade name or names you plan to use
• Business address and contact details
• A payment card or bank account for fees

Checklist Item 4: File the Registration

Here is how to register a DBA in Washington state, step by step:

1. Log in to or create an account in My DOR, the Department of Revenue’s online portal.
2. Complete the Business License Application, adding the trade name in the trade name section. Existing license holders can add a trade name to their current account.
3. Review the entries for spelling, since the name registers exactly as typed.
4. Pay the trade name fee and the application processing fee.
5. Watch for confirmation and keep your updated business license with your records.

To register a DBA in Washington on paper, mail the completed Business License Application to the Business Licensing Service, P.O. Box 9034, Olympia, WA 98507-9034. Online filing is generally faster.

If you would rather hand off the paperwork, a service that helps you register a dba in washington can prepare the application, but the registration itself is still recorded by the Department of Revenue.

Checklist Item 5: Budget for Fees and Plan for Renewal

The Department of Revenue lists the trade name fee at $5 per name, plus a nonrefundable Business License Application processing fee that varies with your situation. Confirm the current amounts on the Department of Revenue website before you file a DBA in Washington.

Renewal is simpler than in many states. Washington says a trade name stays registered indefinitely until the owner asks to cancel it, and cancellation is free. Your business license and any city endorsements follow their own renewal schedules.

Checklist Item 6: Know What a Trade Name Does Not Do

Registering a trade name is a disclosure requirement. It tells the public who is behind a business name. It does not:

• Create a separate legal entity. A sole proprietor with a trade name is still personally liable for business debts. Liability protection requires forming an LLC or corporation.
• Give exclusive rights. The Department of Revenue states that registration does not protect the name from use by others.
• Act as a trademark. For state-level trademark protection, contact the Secretary of State. For nationwide protection, apply through the USPTO.

Banks often ask to see the registration before opening an account under that name, so register a DBA in Washington before you order signs.

Conclusion

The process is short once you know where to look: confirm you need a trade name, search the name, gather your details, and file through My DOR.

Before you register a DBA in Washington, decide whether you also need liability protection or a trademark, since a trade name provides neither. Handled in the right order, it is one of the quickest filings a Washington business will make.