How to File a DBA for an LLC

Gather Your LLC's Paperwork First

Before starting the DBA application, have your LLC's Articles of Organization, its EIN confirmation letter from the IRS, and, if your state requires it, proof your most recent annual report is filed and the LLC is in good standing. Most DBA applications ask for the LLC's exact legal name and formation date, and a mismatch between what you enter and what's on file with the state can delay approval.

Search for Name Availability

Search your state's, or in a county-filing state like California, your county's, business name database for your proposed DBA name and close variations. Most agencies reject a name that's identical or confusingly similar to one already registered, and many block a name that includes "LLC" or another entity designator that doesn't match your actual structure. This search doesn't check the national USPTO trademark database, so search that separately if you want to rule out a trademark conflict too.

Complete the Application

The DBA application itself typically asks for: your LLC's legal name and state of formation, the EIN, the specific DBA name you want to register, your principal business address, and a signature from an authorized member or manager. Some states also ask you to describe the general nature of the business. Use your LLC's name and EIN exactly as they appear on file with the state to avoid a rejection over a mismatch.

File With the Correct Agency and Pay the Fee

Where you file and what it costs both depend entirely on your state.

Confirm your specific state's current fee and agency on its official filing page before submitting payment, since fees are updated periodically.

Complete Any Required Publication

Some states require publishing notice of the new DBA in a newspaper, either before filing, as in Florida, or after, as in California, which requires publication within 45 days after filing and proof of that publication filed within another 45 days after the publication runs. If your state requires this, build the newspaper's own schedule into your timeline, since the DBA generally isn't considered fully registered until any required proof of publication is on file.

Wait for Approval

Processing time varies by state and by whether you file online or by mail; some states process a straightforward filing within days, while others, especially those with a publication requirement, can take a few months from the initial filing to a complete, publicly documented registration. Confirm your specific state's current processing-time estimate before assuming a specific number of days.

Update Your Bank Account and Business Records

Once approved, take the DBA filing, along with your LLC's EIN and formation documents, to your bank to add the name to your existing account, or open a dedicated account for it. Update contracts, invoices, and any local business license to reference the DBA alongside your LLC's legal name going forward.

Double-Check Which Office Handles Your State's Filing

An LLC's formation filing and its DBA filing aren't always handled by the same office. Arizona, for example, registers LLCs with the Corporation Commission but registers trade names with the Secretary of State, a separate agency entirely. Confirm the correct office for the DBA specifically, not just the office you used to form the LLC.

Don't Use the Name Before the Filing Is Complete

In states with a publication requirement, wait until proof of publication is filed, not just the initial application, before using the name on contracts or signage, since the registration generally isn't considered complete until that step is done.

Keep a Copy of Everything You File

Save a copy of the completed application, proof of payment, and any approval or certificate the agency sends back, alongside your LLC's other formation records. You'll likely need these again at renewal or if you ever add a bank account under the DBA.

Not Legal or Tax Advice

Exact forms, fees, and required documentation vary by state and change periodically. Confirm current requirements directly on your state's official filing page before submitting an application.