How to File a DBA in Delaware

3 Simple Steps

How to Use this Guide

Use the guide below to file a DBA or have a professional service do it for you:

– LegalZoom ($99 + state fee) for the most popular DBA filing service available.

– CorpNet ($108 + state fee) for a more personalized DBA filing service.

Step 1) Verify Your DBA Name

WebsiteFiling for a DBA is a pretty painless process, but before you can get into it, you need to make sure that your desired name is available. You can run a quick business trade name search on the Delaware Courts website to see whether or not your name is available.

If you find that another entity already operates under your desired name, you’ll have to change it up so that your name is considered distinguishable. This may require:

  • Changing the spelling of the name
  • Rearranging the words in the name
  • Making the name possessive

Once you’ve found a variation of the name that fits the bill, it’s time to file with the state.

Step 2) Download & Complete Registration Form

Register an LLCNow that you’ve settled on a name, you’re ready to fill out the DBA registration form. This form will ask for information like:

  • Your county (New Castle, Kent or Sussex)
  • Your desired trade name
  • Your business address
  • A phone number for your business
  • Your full name and address (as well as the names and addresses of all business partners)
  • The date of your business’ formation

You can file your Delaware DBA by downloading the DBA registration form and either filling it out online, or printing it and writing out responses in legible handwriting. After you’ve completed the necessary fields, you’ll just need to attach the $25.00 filing fee.

Step 3) Mail In Your Documents

Mail in the FormThe state of Delaware requires that you file and submit your DBA registration with the county Prothonotary’s office rather than the state. So depending on the county that you’re doing business in (New Castle, Kent or Sussex), you’ll send the completed document and payment to one of the following addresses:


New Castle County Courthouse


Superior Court

500 North King Street,

Suite 500, LL1

Wilmington, DE 19801-3746


Kent County Courthouse


Superior Court

38 The Green

Dover, DE 19901


Sussex County Courthouse


Superior Court

1 The Circle, Suite 2

Georgetown, DE 19947

Need Help?

How to File a DBAFiling a DBA in Delaware is fairly simple, but depending on your situation, you may benefit from using a DBA filing service. Handing the reins to a professional will free you up to focus on the day-to-day needs of your business.

We’ve ranked our favorite DBA filing services, so feel free to have a quick read through and check out some of the best providers in the industry!