Can a Business Have Multiple EINs? One Entity, One Number
Last updated November 3, 2026 · Written by the EIN Registration filing team
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| Your setup | EINs | Why |
|---|---|---|
| Sole proprietor with several businesses or trade names | One | It is all one taxpayer: you |
| One LLC or corporation with several DBAs | One | A trade name is not a separate entity |
| One company operating in several states | One | The EIN is federal; state accounts are separate |
| One owner with two or more LLCs | One for each LLC that needs a number | Each LLC is its own entity |
| Parent corporation with subsidiary corporations | One for each corporation | The IRS says each corporation in an affiliated group must have its own |
| A sole proprietorship and an LLC with the same owner | One for each, if both need a number | The LLC is separate from the owner’s sole proprietorship |
| A trust or estate alongside your business | One for each | A trust or estate is its own taxpayer |
Several businesses as a sole proprietor
This is the case people most often get wrong. If you run a landscaping business and an online shop as a sole proprietor, they are one taxpayer, and the Form SS-4 instructions say you generally need only one EIN regardless of the number of businesses or trade names. Report each business on its own Schedule C with the same number. If you incorporate one of them or take on a partner, that business is a new taxpayer and needs a new EIN. The sole proprietor guide covers whether you need one at all.
Several LLCs with one owner
Each LLC is a separate company, so one LLC’s EIN should not be used for another. There is one wrinkle. A single-member LLC with no employees is usually disregarded for income tax, so its income goes on the owner’s return, and the IRS says its W-9 shows the owner’s SSN or EIN rather than the LLC’s. That LLC may still need its own EIN for a bank account, and it must have one to hire employees. The single member LLC guide explains which number goes where. For holding companies and more complicated structures, ask a tax professional which entities are separate taxpayers before you apply.
Setting up several companies at once
The IRS online tool issues one EIN per responsible party per day, so applying for several companies in a single sitting will not work. Plan on one a day, or use another filing method for the rest. Apply only after each company’s state filing is approved, because the application should use the legal name the state recorded.
When a company ends up with a second EIN
Two numbers for one entity usually come from applying twice, and the IRS warns about this directly: use only one application method for each entity so you do not receive more than one EIN. Before you do anything, check that you really have two. A second attempt can also produce a rejection instead of a number.
If you do have two, keep using the correct one, normally the first, and send the IRS a letter closing the extra. The IRS does not delete a number; it closes the account on it. Tell your bank and payroll provider if either one has the wrong number. The guide to closing an EIN says what the letter needs. A lost number is not a reason to apply again: use the EIN lookup guide instead.
A second EIN can be correct
Sometimes a new number is exactly right, because the taxpayer really did change. A sole proprietor who incorporates or takes on a partner needs a new EIN, for example. The old number stays with the old taxpayer and the new business uses the new one. The do I need a new EIN guide goes through each kind of change.
Quick answers
Can one person have multiple EINs?
Yes, through separate entities. Someone who owns two LLCs and a corporation can have a number for each, and may also have one as a sole proprietor. As a sole proprietor alone, the person generally needs only one, however many businesses they run.
Can one LLC have two EINs?
It should not. An LLC has one EIN. A second number usually comes from applying twice by mistake, or from a change that made the LLC a different taxpayer. Keep using the right one and close any extra.
Do I need a separate EIN for each DBA?
No. A DBA is a trade name, not a separate taxpayer, so it uses the EIN of the person or company behind it. The IRS instructions say a sole proprietor needs only one EIN regardless of the number of trade names.
Can two LLCs share one EIN?
No. Each LLC is its own entity, and an LLC that needs an EIN needs its own. Using one company's number for another mixes up their tax records and bank accounts.
Do I need a different EIN for each state?
No. The EIN is federal, so one company keeps one number in every state. What changes state by state are the state registrations and tax accounts.
Is there a limit on how many EINs one person can get?
The limit that matters in practice is the IRS online tool's: one EIN per responsible party per day. Someone setting up several companies at once either spreads the applications over several days or uses another filing method.
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Related guides
- Do I Need a New EIN? The Full Scenario Table A new EIN is needed when the taxpayer changes, not when its details do. Name changes, new partners, and S-corp elections keep it; incorporating, sole prop to partnership, and a trust turning irrevocable need a new one.
- How to Cancel or Close an EIN An EIN is never reused or deleted, but the IRS will close the business account tied to it. When that is worth doing, what to write in the letter, and why a wrong EIN is a different fix.
- Can You Get an EIN for a DBA? A DBA is a name, not an entity, so the EIN belongs to whoever is behind it. What that means for a sole proprietor and for an LLC with several trade names, and the mistake that leaves a DBA with two numbers.
- How to Apply for an EIN for an LLC (LLC Tax ID Number) Nearly every LLC needs its own EIN for the bank, and multi-member LLCs and S corporation elections make it mandatory. The LLC lines on the SS-4, the timing after state approval, and the mistakes that get applications rejected.
- EIN for a Sole Proprietor: Why Most Get One, and When It Becomes Mandatory Most sole proprietors get an EIN to keep their SSN off W-9s, to open a business account, and to be ready to hire. It becomes mandatory with the first employee. What the SS-4 asks a sole proprietor.
Sources
You can also apply for an EIN directly with the IRS at irs.gov at no cost.