Industry
EIN applications: planning, execution and measurement
EIN applications explained: an identifier and nothing more. What the number does, the longer list of what it does not, and why the entity comes first.
An Employer Identification Number is an identifier. That is the whole of it. It is the federal tax system's way of telling one taxpayer from another, in the same way a Social Security number does for an individual.
It confers no status, grants no permission, and protects nothing. People routinely treat getting one as a milestone, the moment the business became real, and then discover it did none of the things they assumed. This page is mostly about that gap.
Nothing here is tax advice. Which number your situation needs, and when, is a question for whoever prepares your returns.
What to take away
- If you are forming an entity, form it first, then apply for the number.
- The application asks who controls the entity.
- The clear cases are structural: entities with more than one owner, entities taxed as corporations, and anyone with employees generally need a federal identifier of their own.
- Some changes to a business let it keep its existing identifier.
What the number does
- It identifies the business on federal filings, so the business's tax history is separate from yours.
- It lets you hire, because employment reporting is tied to an employer's identifier.
- It gives you something to hand out that is not your Social Security number: to banks, to payment processors, to clients issuing information returns.
- It is what banks generally ask for when opening an account in a business's name.
That last point is the practical reason most people get one, and it is a good reason.
What the number does not do
This list is longer, and it is the useful half.
| Common assumption | Reality |
|---|---|
| "I have an EIN, so I have a business entity." | The number identifies a taxpayer. It does not create an LLC, a corporation, or anything else. Entities are created by a state, not by the IRS. |
| "The EIN gives me liability protection." | None whatsoever. Protection comes from a legal form, maintained properly, plus insurance. |
| "Having an EIN means I'm taxed as a business." | Your tax treatment follows your entity and any elections you make. The identifier does not change it. |
| "The EIN registers my business name." | It does not. Name registration is a separate state or local matter, and so are trademark rights. |
| "An EIN is a license to operate." | Licenses and permits come from state and local authorities, and depend on what you do and where. |
| "I have an EIN, so I can skip a state tax registration." | Federal and state identifiers are different systems. A state may issue its own number for its own taxes. |
The order matters
If you are forming an entity, form it first, then apply for the number. Where that sits in the wider sequence is set out in forming an LLC.
The application ties the identifier to a specific taxpayer, named and structured in a particular way. Apply before the entity exists and you may get a number attached to you personally, or to an entity name the state later refuses because it is unavailable. Untangling that afterward is more work than waiting a few days.
The same logic applies to the name: settle what the entity is actually called (confirmed with the state's registry, not just decided in a meeting), before you attach a federal identifier to it.
The responsible party
The application asks who controls the entity. This is not a formality and it is not the accountant, the filing service, or the lawyer. It is meant to be a real person with genuine authority over the business and its funds.
Two things follow:
- Get it right at the start. Naming a nominee or a service provider because it seemed easier creates a record that does not match reality, and it is the record the IRS will use when it needs to reach someone.
- Keep it current. If the controlling person changes (a buyout, a departure, a restructure), the record needs updating. It is one of the entries that quietly goes stale, and stale entries are found at bad moments. Post-formation changes covers the rest of that list.
Who actually needs one
The clear cases are structural: entities with more than one owner, as described in partnership formation, entities taxed as corporations, as described in corporation formation, and anyone with employees generally need a federal identifier of their own. Sole proprietors with no employees, whose position is set out in operating without an entity, often do not strictly need one, and many get one anyway to avoid handing out a Social Security number, which is a perfectly good reason.
The boundary cases depend on facts: certain trusts, certain retirement arrangements, certain excise obligations, and businesses that withhold in particular circumstances. Rather than reason from a general description, check the IRS's own criteria at irs.gov, which is where the current answer lives.
Apply directly
Apply through the IRS itself, whose own application page describes the current channels and any conditions attached to them. There is an industry of intermediaries offering to obtain the number for you, and what they are selling is the act of submitting an application you are able to submit yourself. Some are bundled into formation packages where the charge is not itemized.
If you use a service, at least know what you are paying for. Check the IRS site for the current application channels and any conditions attached to them before you decide.
When a change means a new number
Some changes to a business let it keep its existing identifier. Others require a new one. Which is which depends on the nature of the change: a change of name, a change of address, a change of ownership, and a change of entity type are not treated alike.
Do not reason it out from first principles. Both errors are costly: applying for a new number when the old one was still valid splits your history across two identifiers, and continuing to use an old number after a change that required a new one means your filings are attached to the wrong taxpayer. The IRS publishes the situations that call for a new number; look yours up before you act.
Keep the record where you can find it
Once issued, the number ends up on returns, bank records, payroll systems, information returns, insurance certificates, credit applications, and vendor onboarding forms. Store the confirmation somewhere durable and somewhere your accountant and bookkeeper can reach, not only in your email.
The related habit worth building: keep a single list of every identifier the business has. Federal identifier, state registration number, state tax accounts, local license numbers, and the registry file number for the entity itself. They come from different authorities on different schedules, and the moment you need one is never the moment you have time to find it.
Common questions
Can I get an EIN before I have any customers?
Yes, and it is normal to. The constraint is the entity, not the trading: the number should attach to a taxpayer that already exists in the form you intend to keep.
Do I need a separate EIN for a DBA?
A trade name is not a separate taxpayer. It is a name under which an existing person or entity operates, so it generally does not get its own federal identifier. DBA registration explains what a name filing does and does not create.
What if I have several businesses?
Whether they need separate identifiers depends on whether they are separate taxpayers, separate entities, or several lines of activity inside one, which is a question about legal form before it is a question about numbers, and the trade-offs are in entity type selection. That distinction is worth getting right, because it also determines whether a problem in one can reach the others.
I got an EIN years ago and never used it. Is it still mine?
Federal identifiers are not reissued to someone else, but a long-dormant one attached to an entity that no longer exists in the form you described is not necessarily the number you should be filing under now. Ask your accountant before reusing it.
Is the EIN what makes me look legitimate to a bank?
Banks generally want the identifier, the formation document from the state, and evidence of who is authorized to act for the entity. The number alone is one piece of a set.