No, a FEIN is not the same as a TIN, though the two get mixed up constantly. TIN — Taxpayer Identification Number — is the umbrella term the IRS uses for any of the identifying numbers it tracks taxpayers by. A FEIN, or Federal Employer Identification Number, is one specific type of TIN: the one assigned to businesses and other entities. Every FEIN is a TIN, but plenty of TINs are not FEINs.
What TIN Actually Means
A Taxpayer Identification Number is the IRS’s general label for any identification number it uses to match a filing to the right taxpayer. Federal law requires anyone submitting a return, statement, or other tax document to include the correct identifying number so the agency can tie the paperwork to the right person or entity.1Office of the Law Revision Counsel. 26 USC 6109 – Identifying Numbers Depending on the type, TINs are issued either by the Social Security Administration or by the IRS itself.2Internal Revenue Service. Taxpayer Identification Numbers (TIN)
Five kinds of TIN exist:
- Social Security Number (SSN), for U.S. citizens and authorized residents
- Employer Identification Number (EIN), for businesses and other entities
- Individual Taxpayer Identification Number (ITIN), for people who need to file but can’t get an SSN
- Adoption Taxpayer Identification Number (ATIN), a temporary number for a child in the adoption process
- Preparer Tax Identification Number (PTIN), for paid tax preparers
Each serves a different population, but they all do the same underlying job: tell the IRS exactly who is involved in a filing or transaction.2Internal Revenue Service. Taxpayer Identification Numbers (TIN) So when a form asks for a “TIN,” it is asking which of these numbers applies to you.
What a FEIN Is
An EIN is a nine-digit number the IRS assigns to employers, sole proprietors, corporations, partnerships, estates, trusts, and certain other entities for tax filing and reporting.3Internal Revenue Service. About Form SS-4, Application for Employer Identification Number (EIN) It functions as the business equivalent of a Social Security number, keeping the entity’s tax activity separate from any individual owner’s records.
The word “FEIN” just puts “Federal” in front of “Employer Identification Number.” The IRS itself calls the number an EIN, though it also refers to it as a “federal tax identification number” in some materials.2Internal Revenue Service. Taxpayer Identification Numbers (TIN) “FEIN” shows up more often on older government forms, state tax documents, and bank paperwork. The two acronyms point to the exact same nine-digit number. If your bank or a vendor asks for a FEIN, your EIN is what they want.
Why the Two Terms Get Confused
The confusion has two sources. First, “TIN” and “EIN/FEIN” both describe numbers the IRS uses to identify taxpayers, so people treat them as synonyms. They aren’t. TIN is the category; FEIN is one member of the category.
Second, forms are inconsistent. A W-9 asks for a “Taxpayer Identification Number (TIN)” and then gives you a choice of which number to enter. A state business registration form might demand a “FEIN.” A bank application might say “Tax ID.” All three could be asking for the same number in your specific case — your EIN — but the labels look different, so it seems like they must mean different things.
The practical test is what type of taxpayer you are. If a business, trust, or estate is filing, the relevant TIN is the EIN, and EIN and FEIN mean the same thing. If an individual is filing, the relevant TIN is almost always an SSN, sometimes an ITIN, and never a FEIN — an individual person doesn’t have one unless they operate a business that has been assigned one.
How a FEIN Differs From the Other TINs
The five TIN types split cleanly by who they identify and who issues them.
An SSN identifies an individual person and is issued by the Social Security Administration, not the IRS. Most U.S.-born citizens receive one at birth through hospital registration; others apply using Form SS-5 with evidence of identity, age, and citizenship or lawful immigration status.2Internal Revenue Service. Taxpayer Identification Numbers (TIN)
An ITIN also identifies an individual, but it is issued by the IRS to people who have a federal tax filing need and cannot get an SSN. That includes nonresident aliens filing a return or claiming a treaty benefit, resident aliens with filing obligations, and spouses or dependents of U.S. citizens who need to be listed on a return.4Internal Revenue Service. Individual Taxpayer Identification Number (ITIN) Immigration status does not determine eligibility; the filing need does.
An ATIN is a temporary number for a child placed for adoption when the adopting parents cannot yet get an SSN for the child, so they can still claim the child as a dependent. Once the adoption finalizes and the child has an SSN, the SSN replaces the ATIN.5eCFR. 26 CFR 301.6109-3 – IRS Adoption Taxpayer Identification Numbers
A PTIN identifies a paid tax preparer. Anyone who prepares or assists in preparing federal tax returns for compensation must have a valid PTIN before working on a client’s return, and the PTIN appears on every return the preparer signs.6Internal Revenue Service. PTIN Requirements for Tax Return Preparers
An EIN — the FEIN — identifies the business or entity itself, not any person connected to it. That is the core distinction. An SSN, ITIN, or ATIN is attached to a human being. A PTIN is attached to a preparer’s professional identity. A FEIN is attached to a legal entity: a corporation, partnership, LLC, trust, estate, or a sole proprietorship that has chosen to have one.
Which Number to Give When Someone Asks for a “Tax ID”
When a vendor, client, or bank asks for your “tax ID,” they usually mean whichever TIN correctly identifies the party filling out the form. For a business entity, that is the FEIN. For an individual sole proprietor without a FEIN, it is the SSN. For someone ineligible for an SSN, it is the ITIN.
Not every sole proprietor is required to have an EIN. If you have no employees, no excise tax obligations, and no retirement plans to administer, federal law lets you file using your Social Security number. An EIN becomes mandatory the moment any of the following applies: you have employees, you operate as a corporation or partnership, you file employment or excise or alcohol/tobacco/firearms returns, you withhold taxes on non-wage income paid to a nonresident alien, you administer a retirement plan, or you run a trust, estate, or tax-exempt organization.7Internal Revenue Service. Employer Identification Number
Even where an EIN isn’t required, many freelancers and single-member LLC owners request one so they don’t hand out their Social Security number every time a client sends a W-9. Using an EIN on invoices, 1099s, and credit applications limits how widely your SSN circulates. It also helps banks open a business checking account and lets a single-member LLC keep personal and business finances visibly separate.
The IRS issues EINs at no charge, and no third party is needed to obtain one. The FTC has warned operators of websites that charge consumers up to $300 for what amounts to filling out a free government form.8Federal Trade Commission. FTC Warns Operators of Websites That Charge for an Employer Identification Number If any site asks for a fee, go to IRS.gov instead.
What a FEIN Is Not
One point worth flagging, because the wrong assumption can cost you: a FEIN is a tax identifier, not a business license. Having a FEIN does not authorize you to operate a business. You still need whatever licenses and permits your city or state requires to open your doors legally.
A FEIN also does not replace your personal TIN. If you own a business with a FEIN and you also file a personal return, you still use your SSN or ITIN on the personal return. The business uses its FEIN on business filings. Two different filings, two different TINs, both belonging to the same person in different capacities.
And a change in the “responsible party” listed on your EIN application is not something the IRS discovers on its own. If a new owner takes over or a different officer assumes control, you must notify the IRS within 60 days using Form 8822-B.9Internal Revenue Service. Form 8822-B, Change of Address or Responsible Party The FEIN itself stays with the entity; the record of who controls it has to be kept current.