Employer Identification Number (EIN): Meaning & How to Apply

You need an employer identification number (EIN) if you hire employees, form a corporation or partnership, or must file certain federal taxes. Many people think only businesses with employees need one, but that is not true. A bank, a tax form, or a new business plan can all ask for an EIN number first.

Getting an EIN from the Internal Revenue Service (IRS) costs nothing. This guide helps you decide if you need one, apply the right way, and know what to do next.

Key Takeaways

An employer identification number is a nine-digit federal tax identification number issued by the IRS.
Some businesses and other entities need an EIN even when they have no employees.
Applying directly with the IRS is free.
Eligible online applicants can generally receive an EIN right after the application is approved.
An EIN does not form an LLC, grant a business license, or replace state tax registration.
EINs generally do not expire, but some ownership or structure changes require a new one.

What Is an Employer Identification Number?

What is an EIN? An employer identification number, or EIN, is a nine-digit number the Internal Revenue Service assigns to identify a business or other entity for federal tax purposes. The number stays with the entity and works much as a Social Security number does for a person.

What Does an EIN Look Like?

An EIN has two digits, a hyphen, and then seven digits, formatted XX-XXXXXXX. People also call it a federal employer identification number (FEIN) or a federal tax ID number.

A taxpayer identification number (TIN) is a broader term. It includes the EIN, the Social Security number, the individual taxpayer identification number, and a few others. So every EIN is a TIN, but not every TIN is an EIN.

What Is an EIN Used For?

A business uses its EIN for several jobs:

Filing federal business tax returns.
Reporting employment taxes and running payroll.
Opening a business bank account, when the bank requires it.
Filing certain information returns and business paperwork.
Identifying nonprofits, estates, trusts, and other qualifying entities.

An EIN identifies an entity for tax purposes only. It does not create the entity, and it does not give a nonprofit tax-exempt status on its own.

Who Needs an EIN?

The IRS decides who needs an EIN based on what the entity does and how it is taxed. Size does not matter, so a one-person business is as eligible as a large company.

When an EIN Is Required

An entity generally needs an EIN in these situations:

It hires employees.
It operates as a corporation or partnership.
It files employment, excise, or certain other federal tax returns.
It is a certain kind of trust, estate, or similar entity.
It sets up a Keogh retirement plan.

Before you hire anyone, it helps to know the difference between full-time and part-time employment, since both types count as employees for tax purposes. The official IRS guidance on who needs an EIN lists every case in detail.

Do Sole Proprietors and LLCs Need an EIN?

The answer depends on the business type and its tax treatment:

Sole proprietor with no employees: An EIN is not always required, because the owner can use a Social Security number. An EIN may still be needed for certain tax filings.
Sole proprietor with employees: An EIN is required to handle employment taxes.
Single-member LLC: An EIN is needed if the LLC has employees, owes certain excise taxes, or elects to be taxed as a corporation. Otherwise, it may use the owner’s information for income tax.
Multi-member LLC: This is generally taxed as a partnership, so it generally needs an EIN.
LLC taxed as a corporation: It needs its own EIN.

Not every LLC needs an EIN, and no business is exempt just because it has no employees.

When an EIN May Be Useful Even If It Is Not Required

Many banks ask for an EIN before they open a business account, even when the IRS does not require one. An EIN also helps you keep personal and business finances separate and organized.

Giving clients an EIN can reduce how often you share your Social Security number. It does not replace your Social Security number on every form, so check each form’s instructions.

Business situation	Is an EIN generally required?	Important exception or consideration
Sole proprietor without employees	Not always	Some tax filings or retirement plans can change the answer
Sole proprietor with employees	Yes	Employment tax duties apply
Single-member LLC	Depends	Employees, excise taxes, or a corporate election require one
Multi-member LLC	Generally yes	Confirm the federal tax classification
Corporation or partnership	Generally yes	Entity rules apply
Certain estates or trusts	Depends on the entity	Not every trust follows the same rules

Quick Check: Do I Need an EIN?

Answer these questions in order:

Do you have employees or plan to hire soon? If yes, get an EIN.
Is your business a corporation or a partnership? If yes, get an EIN.
Is your LLC owned by more than one person, or taxed as a corporation? If yes, get an EIN.
Do you file employment or excise tax returns? If yes, get an EIN.
Do you run a trust, an estate, or a retirement plan? You likely need an EIN. Check the entity rules.
Does your bank require one? If yes, get an EIN.

If you answered no to all six, you may not need an EIN yet. Recheck when your business changes.

EIN vs. SSN vs. ITIN vs. State Tax ID

These numbers look alike but serve different purposes. The table shows how they differ.

Identifier	Issued by	Who or what it identifies	Main purpose
EIN	IRS	Businesses and other qualifying entities	Federal tax identification
SSN	Social Security Administration	Individuals	Individual identification and reporting
ITIN	IRS	Certain individuals who cannot get an SSN	Federal tax processing
State tax ID	The state tax agency	State-registered taxpayers	State tax duties

An EIN does not replace an SSN or ITIN for every purpose. A person still uses their own number on personal tax returns.

Getting an EIN also does not finish your state tax registration. Many states ask for their own tax account number for sales tax, payroll tax, or business taxes.

A FEIN and an EIN refer to the same number. A business license or business registration number is a different item. You can have an EIN without a license, and a license does not give you an EIN.

What You Need Before Applying for an EIN

Gather your information first, so the application takes only a few minutes. Use this checklist:

Legal name of the entity, plus any trade name or DBA.
Business mailing address and location.
Entity type and federal tax classification.
Reason for applying.
Formation or business start date.
Principal business activity.
Number of employees, if you plan to hire.
Responsible party’s name and identification details for your application method.

Want a printable version? [Download the EIN application preparation checklist]([add link]).

Who Is the Responsible Party?

The responsible party is the person who ultimately owns or controls the entity. This person manages its funds and assets, and the IRS uses their information to confirm the application.

A nominee should not be listed as the responsible party. Most entities must name an individual, with government entities as the main exception. A helper who fills in the application for you is different from the responsible party, because the responsible party still holds control.

Should You Form Your LLC or Corporation First?

Yes, form your LLC or corporation with the state first. The IRS expects the legal entity to exist before you apply, and the legal name on the application should match your formation documents.

State formation and federal tax identification are two separate steps. Forming the entity creates the business, and the EIN identifies it to the IRS.

How to Get an EIN for Free

You can get an EIN number at no cost by applying directly with the IRS. Follow these five steps.

Step 1: Check Your Application Eligibility

First, confirm that your entity needs an EIN. Then check who can apply online. The online application requires a responsible party with a valid Social Security number, individual taxpayer identification number, or EIN. Citizenship alone does not decide eligibility.

If your principal business is outside the country, you cannot use the online application. You will apply by phone, fax, or mail.

Step 2: Go to the Official IRS Application

Start at the official IRS EIN application page. The government charges no fee for an EIN application.

Some private companies offer to file for you and charge a fee. You do not have to pay anyone to apply.

Step 3: Enter Your Business and Responsible Party Information

Use your legal name exactly as it appears on your formation documents. Pick the correct entity type and tax classification. Review your reason for applying and your business activity before you move on.

Step 4: Review and Submit

Check every name, address, tax classification, and responsible party detail. The IRS issues only one EIN per responsible party per day, for online, fax, and mail requests alike. Do not submit duplicate applications to fix a doubt, because that can delay your number.

Step 5: Save Your EIN Confirmation

Download or save your EIN confirmation as soon as you receive it. Store it with your permanent business records. Banks and other organizations may ask for proof that the IRS assigned the number.

How Long Does It Take to Get an EIN?

The time depends on how you apply. Online is fastest. Times below follow IRS guidance at the time of writing, so check current rules before you apply.

Method	Who can use it	Required form or information	Expected processing time	How confirmation arrives
Online	Eligible applicants	Online application details	Immediate after validation	Shown online to download
Fax	Eligible applicants	Form SS-4	About 4 business days	Faxed back to your number
Mail	Eligible applicants	Form SS-4	About 4 weeks	Mailed notice
Phone	Eligible international applicants	Answers to Form SS-4 questions	Given during the call	Notice follows by mail

Receiving an EIN does not mean every IRS electronic filing or payment system will recognize it right away. A new number can take time to appear in some systems.

Can You Get an EIN Without an SSN or ITIN?

Yes, many applicants without an SSN or ITIN can still get an EIN. They simply use a different application method.

Options for International Applicants

Applicants outside the country cannot use the online application. They can apply by phone, fax, or mail instead. Form SS-4 collects the same information for the fax and mail routes, and the phone route uses the same questions.

What If the Responsible Party Does Not Have an SSN or ITIN?

Lacking an SSN does not automatically block an EIN application. Follow the current instructions for Form SS-4, which explain what to enter when the responsible party has no eligible number. Use the official instructions for Form SS-4 instead of relying on a summary from a third party.

Each situation differs, so no single workaround fits every applicant. When in doubt, ask a tax professional.

What to Do After You Receive Your EIN

Use this checklist to turn your new number into action:

Save the EIN confirmation in a secure place.
Complete any business bank account requirements.
Set up payroll and employment tax processes if you are hiring.
Check whether you need separate state tax registrations.
Update your business and accounting records.
Use the correct name and tax ID number on every tax form.
Track your filing and payment deadlines.

If you are hiring, a payroll system saves time. Payroll runs from the same record HR keeps, so approved hours, leave, and pay changes are already in the run. Compliance in HavernHR tracks documents and expiry dates and keeps an audit trail. Many hiring plans also include employee benefits, which need accurate employer records too.

Which Tax Number Should You Use on Form W-9?

The correct name and tax ID number on Form W-9 depend on your federal tax classification. A disregarded single-member LLC usually gives the owner’s name and tax ID number, while the LLC’s own EIN is used for employment taxes. Read the form’s instructions before you fill it in.

Do not put an LLC’s EIN on every W-9 by default. Use the number that matches your tax classification.

Employer Identification Number Lookup: How to Find or Verify an EIN

People search for an employer identification number lookup, an EIN number lookup, or an EIN code search when they cannot find a number. The right method depends on whose number you need.

Where to Find Your Own EIN

Check these places first:

Your original IRS confirmation notice.
Business tax returns you filed before.
Records from the bank where you opened your business account.
Payroll and accounting records.

The IRS has a page for what to do if you lost or misplaced your EIN. Do not apply for a new EIN just because you cannot find the old one.

How to Request IRS Verification

An authorized person, such as the responsible party, can contact the IRS business tax line. The IRS asks identity questions before it shares anything. The IRS cannot duplicate the original confirmation notice, so it can send an EIN verification letter, known as Letter 147C, when it fits your case.

Can You Look Up Another Business’s EIN?

No single public IRS database lists every private business’s number, so an EIN lookup free tool that covers all companies does not exist. Websites that claim a full look up by EIN may be wrong or may collect your data.

Here are better ways to research another organization:

Ask the business to fill out a Form W-9.
Check public records for nonprofits through the IRS tax-exempt search.
Look at filings from public companies, which show their federal tax IDs.

A federal identification no. is private tax information for many entities, so handle it with care.

Warning: Never apply for a new EIN just because you cannot locate the existing one.

Do You Need a New EIN When Your Business Changes?

You generally need a new EIN when the entity’s ownership or structure changes. A simple name or address change usually does not require one.

Changes That May Require a New EIN

Certain ownership changes.
A change in entity structure, such as a sole proprietor who incorporates.
Certain mergers, reorganizations, or other entity events.

Changes That Usually Require Updating Records Instead

Changing the business address.
Changing the responsible party.
Changing the business name.

Each change follows its own steps. For example, the IRS expects you to report a change in responsible party within 60 days, using Form 8822-B. Not every update uses the same form, so check the instructions for your change.

Does an EIN Expire, and Can You Cancel It?

No, an EIN does not expire, and the IRS does not reuse it for another business. The IRS cannot cancel an EIN either. If you decide you do not need the number, you can write to the IRS and ask it to close your business account.

Close an account only after you file all required returns and pay what you owe. Closing the account does not delete the EIN.

Common EIN Application Mistakes and How to Avoid Them

Most delays come from small errors. Watch for these:

Applying before you complete entity formation with the state.
Entering a DBA instead of the legal name.
Choosing the wrong tax classification.
Listing a nominee as the responsible party.
Applying again after losing the original EIN.
Assuming an EIN replaces licenses or state registrations.
Not saving the confirmation.
Confusing a paid application service with the IRS.

How to Avoid EIN Scams

Apply only through the official IRS website.
Be careful with messages that ask for your Social Security number or bank details.
Remember that the IRS charges no fee for an EIN. A third party may charge for help, but it should not say the IRS requires a payment.

Frequently Asked Questions

Do I Need an EIN If I Have No Employees?

Sometimes. Corporations, partnerships, and many multi-member LLCs need one even without employees. Some sole proprietors do not.

Can I Use My SSN Instead of an EIN?

Some sole proprietors can use their SSN for income tax. You still need an EIN if you hire employees or meet other requirements.

Can I Get an EIN Before Forming My LLC?

You should form the LLC with the state first. The EIN identifies an existing entity, and it does not create one.

Can One EIN Cover More Than One Business?

Generally, each separate entity needs its own EIN. A sole proprietor can often use one EIN for several businesses they operate under their own name.

Can I Apply for an EIN Without an SSN?

Yes, many applicants can. Use fax, mail, or phone as the Form SS-4 instructions describe, because the online application needs an eligible tax number.

Do I Need to Renew My EIN Every Year?

No. An EIN does not expire, so you do not renew it.

Does Getting an EIN Create a Business or Provide a Business License?

No. The EIN only identifies the entity for tax purposes. You still need to form the entity and get any licenses your business requires.

What Should I Do If My EIN Application Is Rejected?

Check that the legal name, entity type, and responsible party details are correct. Then fix the errors and apply again by another method if needed, or contact the IRS business line for help.

Conclusion

An EIN is a federal tax identifier. It does not replace entity formation, licensing, or state registration. Check the rules for your entity type, and remember that applying directly through the IRS is free.

Save your EIN confirmation, then finish the steps that follow, such as banking, payroll, and state registration.