DBA vs. EIN: What Is the Difference?

What Each One Is

A DBA, short for "doing business as," is a state or county registration of the public name a business operates under when that name differs from its legal one. An EIN, or Employer Identification Number, is a nine-digit federal tax identification number the IRS issues to identify a business, or in some cases an individual, for tax filing and reporting purposes. One registers a name; the other identifies a taxpayer. They don't overlap in function, even though many businesses end up with both.

Who Issues Each One

A DBA comes from a state agency, most often the Secretary of State, or from a county or city clerk in states that handle trade names locally. An EIN comes exclusively from the IRS, a federal agency, and can be applied for directly through the IRS's own application, at no cost. No state or county office issues an EIN, and the IRS doesn't register DBAs; the two run through completely separate government systems.

A DBA Has No Tax ID of Its Own

Because a DBA is only a name, it isn't a taxpayer and can't hold its own EIN or file its own tax return. Income earned under a DBA flows to whichever legal party actually owns the business: a sole proprietor reports it under their own Social Security number or EIN, and an LLC or corporation reports it under its own EIN, regardless of how many different DBAs that same entity operates. Filing a DBA doesn't create a new taxpayer, and it has no effect on which EIN, if any, applies to the income earned under that name.

Can You Have One Without the Other

A business can hold an EIN while never filing a DBA at all, simply by operating and invoicing under its own legal name. An LLC, for example, typically needs an EIN to open a bank account and run payroll, regardless of whether it ever registers a separate trade name. On the other side, a sole proprietor can file a DBA and continue using their Social Security number instead of an EIN, since the IRS doesn't require a sole proprietor with no employees to obtain one. Having a DBA never obligates you to get an EIN, and having an EIN never requires you to file a DBA.

Form SS-4's Trade Name Line

When a business does apply for an EIN, the IRS's Form SS-4 includes a line for a trade name, separate from the legal name of the entity, specifically so a business that already operates under a DBA can note it on the application. Listing a trade name there doesn't change how the EIN works; it simply tells the IRS which public name is associated with the legal entity behind that EIN, for the IRS's own records.

Using the Same EIN Across Multiple DBAs

If a single LLC or corporation operates several DBAs, all of them typically share that one entity's EIN, since the EIN identifies the legal taxpayer, not any individual trade name. There's no requirement, or mechanism, to get a separate EIN for each DBA a business runs; doing so would only be necessary if each DBA were actually operated by a separate legal entity instead.

Opening a Bank Account Usually Needs Both

Most banks ask for both the approved DBA filing and the EIN (or Social Security number for a sole proprietor) before opening a business account in a trade name. Have both documents ready, since missing either one typically delays account opening.

Updating the IRS When You Add a DBA

If a business that already has an EIN later adds a new DBA, there's generally no need to apply for a new EIN; the existing one still applies to the entity regardless of the added trade name. Some businesses choose to note the new DBA with the IRS on their next return or correspondence, mainly so IRS records stay current, rather than because it's strictly required to keep using the same EIN.

If You Already Have an EIN and Want to Add a DBA

An EIN obtained under a business's legal name remains valid after the business files a new DBA; there's no need to reapply. File the DBA with your state or county as its own separate process, and update your bank, invoicing, and marketing materials to reflect the new name once it's approved.

Not Tax Advice

Whether your specific business needs an EIN, and how a DBA should be reflected in your tax filings, depends on your entity type and whether you have employees. Talk to a tax professional about your specific situation before assuming either filing changes your tax obligations.