Federal Tax ID vs EIN: Are They the Same Thing? (2026)
- "Federal tax ID" is the umbrella term; an EIN is one type of it. So when people say an EIN is a federal tax ID, they're right — it just isn't the only one.
- A federal tax ID is really a Taxpayer Identification Number (TIN), and the IRS issues several kinds: EIN, ITIN, ATIN and PTIN — plus the SSN, which comes from the Social Security Administration.
- An EIN identifies a business; an SSN or ITIN identifies a person.
- An EIN is nine digits, formatted XX-XXXXXXX, and applying directly with the IRS is free.
- Foreign founders with no SSN or ITIN can still get an EIN — just not through the online tool; they use Form SS-4 by fax, mail or phone.
- Not sure which number you need? Our EIN service handles the whole application for you.
If you've been told you need a "federal tax ID" to open a US business bank account, hire staff or file a return, and then someone else told you that you need an "EIN," it's fair to wonder whether those are two different things you have to chase down. The good news: they're usually the same thing. The reason the terms get muddled is that "federal tax ID" is a category, and an EIN is one member of that category. This guide clears up exactly how the pieces fit together, so you know precisely which number you need and how to get it.
Is a federal tax ID the same as an EIN?
In everyday business use, yes — when someone asks a company for its "federal tax ID number," they almost always mean its EIN. The IRS itself describes the EIN as "a federal tax ID number for businesses," and it's also called a Federal Employer Identification Number (FEIN). Bank forms, payroll providers and vendors use all three names for the same nine-digit number.
The precise answer is slightly more nuanced: "federal tax ID" is the broad term, and an EIN is one specific type of it. A federal tax ID — properly, a Taxpayer Identification Number — is any number the IRS or Social Security Administration uses to identify a taxpayer. An EIN is the version used for a business. So every EIN is a federal tax ID, but not every federal tax ID is an EIN. Your personal Social Security Number is a federal tax ID too.
What is a federal tax ID number?
A federal tax ID number is a Taxpayer Identification Number (TIN) — the identifier the IRS uses to track a person or entity across every return, payment and notice. There are five types, and knowing which is which removes almost all the confusion:
| Type of TIN | Who it's for | Issued by |
|---|---|---|
| SSN — Social Security Number | US citizens and authorized residents | Social Security Administration |
| EIN — Employer Identification Number | Businesses and other entities | IRS |
| ITIN — Individual Taxpayer Identification Number | Individuals who can't get an SSN but must file | IRS |
| ATIN — Adoption TIN | A child being adopted, pending an SSN | IRS |
| PTIN — Preparer TIN | Paid tax return preparers | IRS |
For a business, the one that matters is the EIN. For an individual who isn't eligible for a Social Security Number, it's the ITIN. Everything else on the list is a special case.
What is an EIN, exactly?
An Employer Identification Number is a nine-digit number the IRS assigns to a business entity, formatted XX-XXXXXXX (two digits, a hyphen, then seven). Despite the "Employer" in the name, you don't need employees to need one — the name is misleading. You need an EIN if you:
- Operate as a corporation or a partnership
- Have a multi-member LLC (and often a single-member LLC too, for banking)
- Hire employees or run payroll
- File employment, excise, or alcohol, tobacco and firearms returns
- Withhold taxes on income paid to a non-resident alien
- Administer an estate, trust, or retirement plan
Even when it isn't strictly required — a single-member LLC or sole proprietor with no staff, say — most owners get one anyway. It lets you open a business bank account, apply for a payment processor, and hand contractors a number for their 1099 forms without exposing your personal SSN. Once issued, an EIN belongs to that business permanently; it's never reassigned, even if the company closes.
💡 New for 2026: business owners can now download a digital EIN verification notice (CP575) from their IRS Business Tax Account, which banks accept in place of the old Letter 147C. If you've lost your original EIN confirmation, you no longer have to phone the IRS and wait for it in the post.
EIN vs SSN vs ITIN: what's the difference?
These three are the numbers people mix up most often. The simplest way to keep them straight: an EIN identifies a business; an SSN and an ITIN identify a person.
| EIN | SSN | ITIN | |
|---|---|---|---|
| Identifies | A business | A person | A person |
| Format | XX-XXXXXXX | XXX-XX-XXXX | 9XX-XX-XXXX (starts with 9) |
| Who gets it | Any entity that needs one | Citizens & authorized residents | Those ineligible for an SSN |
| Issued by | IRS | SSA | IRS |
One point that trips up foreign founders: an ITIN is not a work permit and not a business number. It exists so someone without an SSN can meet a US filing obligation — for example, a non-resident owner reporting income from a US LLC. The business still needs its own EIN. It's common to need both: an EIN for the company and an ITIN for the individual behind it.
Do you need an EIN or an ITIN?
Decide it by asking what needs identifying — the company or you:
Many international entrepreneurs need both, in order: the EIN to stand the company up, and an ITIN to handle their personal filing. We cover the individual side on our ITIN application service page, and the business side through our US EIN registration service.
How do you apply for an EIN?
Applying directly with the IRS is free — be wary of sites that charge a "processing fee" for the number itself. You apply on Form SS-4, and the method depends on whether the responsible party already has an SSN or ITIN:
This is the step that stalls most overseas founders: no SSN or ITIN means no online application, so they're left with fax, mail or an international phone call and a Form SS-4 that has to be completed exactly right, or it bounces. That's precisely the friction our EIN registration service removes — we prepare and file the SS-4 and deal with the IRS on your behalf.
Is a federal tax ID the same as a state tax ID?
No. A federal tax ID (your EIN) is issued by the IRS and is used nationwide. A state tax ID is a separate number issued by an individual state's tax authority, and you'd register for one to handle things like state income tax withholding or sales tax. Depending on where and how you operate, you may need both — the federal EIN first, then a state registration on top of it.
Because state rules vary widely, it's worth confirming what your specific state requires rather than assuming the EIN covers everything. If you'd like a clear read on which registrations your business actually needs, get an instant quote and we'll map it out.
Frequently asked questions
Is a federal tax ID number the same as an EIN?
For a business, yes — "federal tax ID number" and "EIN" are used interchangeably, and the IRS calls the EIN a federal tax ID. Strictly, "federal tax ID" is the umbrella term (a Taxpayer Identification Number) and an EIN is one type of it, alongside the SSN, ITIN, ATIN and PTIN.
Is an EIN the same as a Tax ID?
An EIN is one kind of Tax ID (TIN). A TIN is any IRS identifier for a taxpayer; the EIN is the version used to identify a business entity, so every EIN is a TIN but not every TIN is an EIN.
How many digits is an EIN?
An EIN is nine digits, written in the format XX-XXXXXXX. A Social Security Number is also nine digits but formatted XXX-XX-XXXX, and an ITIN is nine digits beginning with a 9.
Can I get an EIN without a Social Security Number?
Yes. Foreign business owners without an SSN or ITIN cannot use the IRS online tool, but can still get an EIN by submitting Form SS-4 by fax, by mail, or by applying over the phone as an international applicant.
Do I need an EIN or an ITIN?
Get an EIN to identify a business — an LLC, corporation or partnership. Get an ITIN if you're an individual who must file a US return but isn't eligible for a Social Security Number. Many international founders need both: an EIN for the company and an ITIN for themselves.
Does it cost money to get an EIN?
Applying for an EIN directly with the IRS is free. Some third-party websites charge a fee for the number itself — you're paying only for convenience or filing help, never for the EIN, which the IRS never charges for.
We prepare and file your Form SS-4, deal with the IRS directly, and sort your ITIN too if you need one — no SSN required. Get a fixed-fee quote or message us today.
Related: our US EIN registration service and ITIN application service. Official guidance is on the IRS Employer Identification Number pages.