The FEIN Definition: What a Federal Employer Identification Number Is refers to a nine-digit number issued by the IRS to identify a business or qualifying organization for federal tax purposes. It is also called an EIN or Federal Tax Identification Number.
A business owner may need a FEIN when starting a business, managing payroll, completing tax forms, opening bank accounts, or meeting federal tax obligations. An LLC may also need one depending on its structure and requirements.
You can apply for a FEIN through the IRS without necessarily paying a third-party service. Understanding how to use the number correctly helps with business paperwork, tax compliance, and overall business compliance.
FEIN Definition: What Is a Federal Employer Identification Number?
A FEIN is a Federal Employer Identification Number issued by the Internal Revenue Service (IRS) to identify a business or other entity for federal tax purposes.
The number contains nine digits and normally appears in this format:
XX-XXXXXXX
Despite the word “Employer” in its name, you don’t necessarily need employees to have an EIN. The IRS assigns EINs to many types of organizations for reasons beyond payroll.
For example, a corporation may need an EIN even if it has no employees. A partnership generally needs one because the partnership is a separate entity for federal tax reporting. Certain trusts, estates, nonprofits, and other organizations may also need one.
In everyday business language, FEIN and EIN generally mean the same thing.
The IRS primarily uses the term Employer Identification Number (EIN). “FEIN” simply emphasizes that the identification number comes from the federal government rather than a state agency.
Quick definition: A FEIN is a nine-digit federal tax identification number the IRS uses to identify eligible businesses, organizations, and other entities.
What Does FEIN Stand For?
FEIN stands for Federal Employer Identification Number.
Here’s what each part means:
| Term | Meaning |
| F | Federal |
| E | Employer |
| I | Identification |
| N | Number |
| FEIN | Federal Employer Identification Number |
The term can sound more complicated than it is. Think of an EIN as a federal identification number for an organization. It helps the IRS distinguish one taxpayer entity from another.
The word “federal” matters because states can have their own tax identification systems. A business might therefore have a federal EIN plus one or more state tax account numbers.
Is a FEIN the Same as an EIN?
Yes, in most business and tax contexts, FEIN and EIN refer to the same number.
The IRS calls the number an EIN. Many accountants, banks, government forms, and business websites use FEIN as another name for it.
You don’t normally apply for a separate “FEIN” after receiving an EIN. You’re applying for the same federal identification number.
For example, if your company receives an EIN of 12-3456789, that number is also commonly described as its FEIN.
Why Do People Say FEIN Instead of EIN?
The added word “Federal” helps distinguish an EIN from other identification numbers.
A business owner might say:
- “What’s your EIN?”
- “What’s your FEIN?”
- “What’s your federal tax ID?”
In many situations, they’re asking for the same nine-digit number.
However, “tax identification number” is a broader term. It can refer to several types of taxpayer identification numbers, so context matters.
What Is a FEIN Used For?
A FEIN serves as an official federal identifier. The IRS and other organizations use it to connect tax filings and business records with the correct entity.
Here are some of the most common uses.
Federal Tax Filing
Businesses and organizations may use an EIN when filing federal tax returns and other IRS forms.
The exact forms depend on the entity and its tax obligations. A corporation, partnership, employer, and nonprofit don’t necessarily file the same forms.
The EIN helps the IRS identify the taxpayer connected to those filings.
Hiring Employees
Employers generally need an EIN for federal employment tax reporting.
That’s one reason the IRS uses the term Employer Identification Number. When you hire workers, your business takes on responsibilities involving payroll taxes, employment tax returns, and related reporting.
Your company’s EIN identifies the employer. An employee’s Social Security number (SSN) identifies the individual.
Those numbers serve completely different purposes.
Opening a Business Bank Account
Banks commonly ask businesses for an EIN when opening business checking or savings accounts.
The bank may also request:
- Business formation documents
- Government-issued identification
- Business address
- Ownership information
- Articles of organization or incorporation
- Partnership documents
- Business licenses, depending on the bank
An EIN can help establish the business as a distinct customer in the bank’s records.
Filing Information Returns
Businesses may use their EIN on certain information returns and other federal tax documents.
For example, businesses may encounter EIN requirements when reporting payments or employment-related information to the IRS.
Operating Certain Organizations
EINs aren’t limited to conventional businesses.
Depending on their circumstances, the following may need an EIN:
- Partnerships
- Corporations
- Limited liability companies
- Tax-exempt organizations
- Estates
- Trusts
- Certain retirement plans
- Certain other organizations and entities
The key question isn’t simply whether the organization makes money. Federal tax classification and the organization’s activities determine whether an EIN is required.
Who Needs a FEIN?
There’s no universal rule saying every business owner must obtain a FEIN.
Instead, the requirement depends on the organization’s structure and circumstances.
Corporations
Corporations generally need an EIN.
That includes corporations organized under state law and treated as corporations for federal tax purposes.
A corporation doesn’t need to have a large workforce to have an EIN. The entity itself can require a federal identification number.
Partnerships
A partnership generally needs its own EIN.
That’s because the partnership has its own federal tax reporting obligations even though the partners generally report their allocated share of partnership income on their individual tax returns.
LLCs
LLC requirements depend heavily on how the LLC is treated for federal tax purposes.
A multi-member LLC is generally classified as a partnership for federal income tax purposes unless it elects another classification. As a result, it generally needs an EIN.
A single-member LLC is different.
For federal income tax purposes, the IRS generally treats a single-member LLC as a disregarded entity unless the LLC elects to be taxed as a corporation. However, that doesn’t mean the LLC can never have or need an EIN.
Specific circumstances can require one, including having employees or certain federal tax obligations.
Sole Proprietors
A sole proprietor doesn’t automatically need an EIN simply because the person operates a business.
In many cases, a sole proprietor without employees can use the owner’s SSN for federal income tax purposes.
However, a sole proprietor may need an EIN when circumstances such as hiring employees create an obligation to obtain one.
A business owner may also choose to obtain an EIN even when the IRS doesn’t strictly require it.
Does Every Business Need a FEIN?
No.
That’s one of the most important points in any FEIN definition.
A sole proprietor operating without employees may not need an EIN. Meanwhile, a corporation with no employees can still need one.
Consider these simplified examples:
| Business situation | EIN generally required? |
| Sole proprietor with no employees | Not necessarily |
| Sole proprietor with employees | Generally yes |
| Partnership | Generally yes |
| Corporation | Generally yes |
| Multi-member LLC taxed as partnership | Generally yes |
| Single-member LLC | Depends on circumstances |
| Nonprofit organization | Often yes |
| Estate | Generally required when applicable |
| Trust | Depends on the type and circumstances |
Because federal tax rules vary by entity and situation, don’t use this table as a substitute for the IRS’s current requirements.
FEIN vs. SSN vs. ITIN vs. State Tax ID
These identification numbers can look similar in business paperwork, but they aren’t interchangeable.
| Identification number | Identifies | Issued by | Main purpose |
| EIN/FEIN | Business or eligible entity | IRS | Federal tax and entity identification |
| SSN | Individual | Social Security Administration | Individual identification and tax purposes |
| ITIN | Certain individuals who aren’t eligible for an SSN | IRS | Federal tax purposes |
| State tax ID | Taxpayer or business within a state system | State tax authority | State tax administration |
Here’s an easy way to remember the distinction:
An SSN generally identifies a person. An EIN generally identifies an organization or other eligible entity.
A business can also have an EIN and a state tax account at the same time.
FEIN vs. Business License: They’re Not the Same
An EIN doesn’t give you permission to operate a business.
That’s an important distinction.
A FEIN identifies your business or organization for federal tax purposes. A business license, permit, or professional credential can authorize specific commercial activities under federal, state, county, or local rules.
For example, obtaining an EIN doesn’t automatically mean you’re allowed to:
- Open a restaurant
- Practice a regulated profession
- Sell alcohol
- Operate a certain type of facility
- Conduct a locally regulated activity
Licensing requirements depend on the activity and jurisdiction.
In other words, an EIN identifies you for federal tax administration. It doesn’t replace a license or permit.
How to Get a FEIN From the IRS
The IRS provides several ways to apply for an EIN, with eligibility depending on the applicant’s circumstances.
For many eligible applicants, the IRS online application is the most convenient route.
What Information Do You Need?
Before starting an EIN application, have the relevant business information available.
You may need information such as:
- Legal name of the entity
- Trade name, if applicable
- Mailing address
- Physical business address, when applicable
- Type of entity
- Reason for applying
- Responsible party information
- Formation details
- Information about employees, when relevant
The responsible party is an important part of the application. The IRS uses this information to identify the person who ultimately owns or controls the entity, subject to the applicable rules.
Choose your entity classification carefully. Selecting the wrong structure can cause confusion later when you file federal tax forms.
How Much Does a FEIN Cost?
An EIN is free when you obtain it directly from the IRS.
That’s worth remembering because numerous commercial services offer EIN application assistance for a fee.
You don’t need to pay a private company simply to obtain an EIN from the IRS.
The official IRS website provides the application service at no charge.
Important fact: If a website asks you to pay for an EIN application, you’re dealing with a third-party service rather than paying an IRS fee for the EIN itself.
Always start with the official IRS website when possible.
Can You Get a FEIN Without Employees?
Yes.
Despite its name, an Employer Identification Number isn’t exclusively for employers.
For example, corporations and partnerships can need EINs even when they don’t have employees. Certain nonprofits, trusts, estates, and other entities may also need them.
That’s why the question shouldn’t be:
“Do I have employees?”
Instead, ask:
“Does my entity or situation require a federal EIN?”
Employee status is only one factor.
Can You Get a FEIN Without an LLC?
Yes. Absolutely.
An EIN isn’t an LLC identification number.
You can have an EIN for several types of organizations, including:
- Sole proprietorships
- Partnerships
- Corporations
- LLCs
- Nonprofits
- Trusts
- Estates
- Certain other eligible entities
Think of the EIN as a federal identifier attached to an eligible taxpayer entity. The business structure determines how that entity is treated for federal tax purposes.
When Should You Apply for a FEIN?
Timing matters.
If you’re forming an entity that requires an EIN, obtaining the number early can prevent delays with banking, payroll, tax filings, and other administrative tasks.
You should consider the timing of an EIN application when:
- You’re forming a corporation.
- You’re forming a partnership.
- You’re establishing an LLC that requires an EIN.
- You’re preparing to hire employees.
- You’re establishing certain tax-exempt organizations.
- You’re creating an estate or trust that requires an EIN.
- You’re changing an entity’s structure in a way that affects its federal tax identity.
Don’t assume that obtaining an EIN alone completes every business registration requirement. Federal, state, and local obligations can operate separately.
What Happens When Your Business Changes?
Getting an EIN is only part of the story. Business changes can raise another question: Do you need a new EIN?
The answer depends on the change.
Changing Your Business Name
A business name change doesn’t automatically mean you need a new EIN.
The appropriate IRS reporting procedure depends on the entity type and circumstances.
Changing Your Business Address
Moving your business generally doesn’t mean you need an entirely new EIN.
Instead, you may need to update your address with the IRS through the appropriate process.
Changing Your Business Structure
This is more complicated.
A change from one legal or tax structure to another can sometimes require a new EIN. For example, creating a new legal entity isn’t the same as changing a mailing address.
The IRS provides specific guidance for determining when an existing EIN remains valid.
How to Find Your FEIN
Losing your EIN paperwork doesn’t necessarily mean you’ve lost your EIN.
Before applying for another number, search your existing business records.
Check These Documents First
Look for the EIN on:
- Previous federal tax returns
- IRS correspondence
- EIN confirmation documentation
- Payroll records
- Business bank documents
- Accounting records
- Loan paperwork
- Tax preparation records
Your accountant or tax professional may also have the EIN in your business records.
If you still can’t locate it, the IRS has procedures for authorized individuals to retrieve the number.
Don’t automatically apply for a second EIN just because you can’t find the first one.
That can create unnecessary administrative problems.
What Is an EIN Confirmation Letter?
When the IRS assigns an EIN, it provides documentation confirming the number.
Businesses should keep that documentation with important formation and tax records.
A good recordkeeping system might include a secure folder containing:
- EIN confirmation
- Formation documents
- Federal tax returns
- State registrations
- Tax notices
- Payroll records
- Banking documents
Treat these records like the foundation of your administrative house. You may not look at them every week, but you’ll want them when something important comes up.
Case Study: A Sole Proprietor Starting a Consulting Business
Consider Sarah, a freelance marketing consultant operating as a sole proprietor.
She has no employees. For federal income tax purposes, she may generally report her business income on her individual return and may not be required to obtain an EIN solely because she operates the business.
Now change one fact.
Sarah hires an employee.
Her federal employment tax responsibilities change. She generally needs an EIN for those employer-related obligations.
The business didn’t suddenly become an LLC. The change came from the nature of her tax and employment responsibilities.
This example illustrates why the question “Does every business need a FEIN?” doesn’t have a one-size-fits-all answer.
Case Study: A Multi-Member LLC
Imagine two people form an LLC together to operate a consulting company.
Unless they make an election that changes their federal tax classification, a domestic multi-member LLC is generally treated as a partnership for federal income tax purposes.
The LLC therefore generally needs an EIN.
The owners’ personal SSNs don’t replace the LLC’s EIN for the entity’s federal tax reporting.
This distinction becomes especially important when the company opens financial accounts and handles federal tax filings.
Can a FEIN Expire?
An EIN generally doesn’t expire simply because the business hasn’t used it recently.
However, the IRS can require a new EIN in certain circumstances involving changes to an entity.
That means you shouldn’t think of an EIN like a driver’s license with a routine expiration date.
It’s better to think of it as a permanent federal identifier for a particular entity, subject to IRS rules about when a new number becomes necessary.
Is a FEIN Public Information?
EINs can appear in business records, tax documents, and other contexts where an organization’s federal identifier is disclosed.
However, that doesn’t mean you should publish your EIN everywhere.
Businesses should use reasonable care when sharing identifying information. An EIN can be useful to criminals attempting business identity theft or fraudulent tax activity.
Watch for warning signs such as:
- Unexpected IRS notices
- Tax filings you didn’t authorize
- Unfamiliar employment tax records
- Suspicious correspondence
- Unexpected changes in business tax accounts
If something looks wrong, address it promptly through the appropriate government channels.
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FAQs:
What does FEIN stand for?
FEIN stands for Federal Employer Identification Number. It is a nine-digit number used by the IRS to identify businesses and qualifying organizations for federal tax purposes.
Is FEIN the same as EIN?
Yes. FEIN and EIN generally refer to the same federal identification number issued by the IRS.
Who needs a FEIN?
Businesses and organizations may need a FEIN for tax filing, payroll, hiring employees, banking, or other federal business requirements.
How can I get a FEIN?
You can apply for a FEIN through the IRS. The application is generally available directly from the IRS without needing to pay a third-party service.
Does an LLC need a FEIN?
An LLC may need a FEIN depending on its tax classification, employees, and other business circumstances. Not every LLC has identical requirements.
Conclusion:
A FEIN is an important business identification number used for federal tax and administrative purposes. Knowing when you need one can help you handle payroll, taxes, banking, and business paperwork correctly.
Because FEIN and EIN generally mean the same thing, you may see either term on business and tax documents. Applying directly through the IRS can also help you avoid unnecessary third-party costs.
