Business Name for an Online Shop: DBA, Entity, Trademark, Domain
A name can be registered in four different places, and each protects something different. The SBA describes them as entity name, trademark, doing-business-as (DBA) name and domain name. Picking one does not cover the others: owning a website address, for example, gives no trademark rights. This is general information as of October 2026; rules vary by state, county and city.
1. Entity name: state level
If you form an LLC, corporation or similar entity, the state may require you to register a legal entity name. The SBA says it is how the state identifies your business, and that rules on what the name can be and on suffixes vary by state. Most states do not allow a name already registered by someone else, and some require the name to reflect the kind of business. In most cases the registration prevents anyone else in that state from operating under the same entity name, with exceptions depending on state and structure.
2. Trademark: national level
The SBA says a trademark protects the name of your business, goods and services nationally, and keeps others in the same or a similar industry in the U.S. from using it. The SBA also warns that businesses in every state are subject to trademark infringement lawsuits, which can be costly, so you should check a prospective business, product and service name against the official database kept by the U.S. Patent and Trademark Office before adopting it. To trademark a name, the SBA says to file with the USPTO once you have formed your business.
The USPTO adds two limits. You become a trademark owner by using the mark with your goods or services, but those unregistered rights only apply to the geographic area where you operate; registration is what creates nationwide rights, and it is optional. And a trademark covers how a word is used with your specific goods or services, not the word in general, so it does not stop others from using a similar name for unrelated goods.
3. DBA: the name you trade under
A DBA is also called a trade name, fictitious name or assumed name. According to the SBA, you might need to register it with the state, county or city where the business is located, and most states require registration if you use one. Some business structures require a DBA.
Two limits matter. The SBA says registering a DBA "doesn't provide legal protection by itself." And multiple businesses can use the same DBA in one state, so it gives you more freedom in what you pick but less protection. The SBA's example: a business with the entity name Springfield Electronic Accessories can trade as TechBuddy. Trademark infringement laws still apply to the DBA.
A DBA does have a practical use: the SBA says getting a DBA together with an EIN allows you to open a business bank account under that name.
4. Domain name: your web address
You register a domain through a registrar. The SBA says that once registered, nobody else can use it while you keep renewing it, and that it protects your online brand presence. But the domain does not need to match your legal name, trademark or DBA. The SBA's example is an entity called Springfield Electronic Accessories registering techbuddyspringfield.com. The reverse also holds: owning the domain does not give you trademark rights. The SBA suggests using an accredited registrar and notes domains need regular renewal.
5. What this means for an online-only shop
A shop that sells only online still sells from a physical location in some state, and the SBA says business location determines the taxes, zoning rules and regulations that apply, including for home-based businesses. That is why the DBA and entity rules above are set by the state, county or city where you are located, not by the marketplace you sell on. Marketplace storefront names and social handles are separate from all four registrations.
6. A simple order of operations
- Search the USPTO trademark database for the name and close variants.
- Check your state's business name records, or its guidance for sole proprietors.
- If you will trade under a name that differs from your own or your entity's, look up the DBA rule for your state, county or city.
- Register the domain.
- If you want national protection, file a trademark application once the business is formed.
The SBA also says to apply for a federal EIN after registering the business. The IRS says the application is free and issues the EIN immediately online, and that you never have to pay a fee for one. For an LLC or corporation, the IRS says to form the entity with the state first, because applying earlier may delay the EIN.
7. Key takeaways
- Entity names protect you in one state and registered trademarks nationally; DBAs and domains protect little on their own.
- A DBA is mostly a registration requirement and a banking tool, not protection.
- A domain name can differ from your legal name and gives no trademark rights.
- Check the USPTO trademark database before settling on a name.
- Requirements for DBAs vary by state, county and city.