An EIN is free, usually fast, and useful long before your first employee. Here is what it does and how to get yours without paying a middleman.
I’ve spent 20 years starting companies, and an EIN is one of the rare federal tasks that can take less time than choosing a domain name. It’s a nine-digit number, costs $0, and often arrives online in minutes.
That small win matters because your EIN becomes the identification number attached to much of your business life. Banks, payroll providers, tax agencies, lenders, vendors, and licensing offices may all ask for it. Think of it as your company’s tax ID, not a permit to operate and not a substitute for forming the business correctly.
The process is simple when you do things in the right order. Form the legal entity first, gather the responsible party’s information, and apply directly through the IRS. The word directly is doing useful work there. Plenty of websites will sell you a free number while wearing a very official-looking tie.
What Is an EIN?
An Employer Identification Number is a unique federal tax identification number. The IRS assigns it to businesses, tax-exempt groups, estates, trusts, and other entities. It contains nine digits and usually appears as 12-3456789.
Despite the name, you can need an EIN without having employees. Partnerships, corporations, and many LLCs need one because of their entity type. A sole proprietor may request one for banking, state tax, or privacy reasons even when federal law does not require it.
Your EIN identifies the business in federal tax records. Your Social Security number identifies you as an individual. Mixing those two jobs creates needless exposure, so keep the lanes clean whenever a business form accepts the EIN.
Why Founders and Small Business Owners Need an EIN
You need an EIN when federal tax rules require it or when a practical business task demands it. The legal requirement comes first. The operational reasons usually arrive five minutes later.
The IRS says you generally need an EIN if you have employees, operate a partnership or corporation, or file certain employment and excise tax returns. Estates, many trusts, retirement plans, and tax-exempt organizations also use EINs. A multi-member LLC normally needs one because it generally files as a partnership unless it elects another tax treatment.
A single-member LLC is more nuanced. It may be a disregarded entity for federal income tax, yet it can still need an EIN for employees or certain excise taxes. DailyDime’s complete guide to LLCs and taxes explains why an LLC’s legal structure and tax treatment are separate decisions.
Even when the IRS does not require the number, getting one can make sense. A business bank may request it. A vendor may ask for it on Form W-9. A state may need it for payroll or tax registration. The EIN also lets many sole proprietors avoid handing their Social Security number to every customer with an accounts-payable portal designed in 2009.
Who Needs One?
Business setup | Federal EIN rule | My practical verdict |
Sole proprietor, no employees | Often optional for federal tax purposes | Get one if a bank, client, state, or privacy concern calls for it. |
Single-member LLC, no employees | May not need one for federal income tax | Usually useful. Confirm your tax election and state rules first. |
Multi-member LLC | Generally required | Get it after the state approves the LLC. |
Partnership | Required | Treat it as part of formation, not a later cleanup item. |
C corporation or S corporation | Required | Get it after state formation and before tax filings or payroll. |
Any business with employees | Required | You need it for payroll tax reporting and deposits. |
Source: IRS EIN guidance. Entity details can change the answer, so confirm your setup with a tax professional.
What Is an EIN Used For?
An EIN connects your business to tax reporting, banking, payroll, and other business systems. It does not create the company, protect the name, or replace a state license. It is identification, not permission.
Federal and State Tax Filings
Corporations use an EIN on Forms 1120 or 1120-S. Partnerships use it on Form 1065. Employers use it on payroll forms such as Form 941 and W-2 filings. States may also request the EIN when you register for payroll withholding, unemployment insurance, sales tax, or other accounts.
One number can touch several systems, yet those registrations remain separate. An EIN does not automatically enroll you for state sales tax or payroll. Government systems rarely volunteer to finish each other’s paperwork. That would be suspiciously convenient.
A Business Bank Account
Banks commonly ask for your EIN, formation documents, ownership information, and identification for the owners. The EIN helps the bank verify the entity and report certain account activity correctly.
A separate account also keeps bookkeeping cleaner. Once the account is open, connect it to one of the systems in DailyDime’s guide to the best accounting software for small business owners. Your future accountant will quietly bless you.
Payroll and Hiring
You use the EIN to report wages, withhold taxes, make federal tax deposits, and issue W-2s. Payroll providers will ask for it during setup. State payroll accounts usually come next.
The EIN does not decide whether someone is an employee or contractor. That is a separate classification question with real tax consequences. Review 1099 versus W-2 rules before you put the first person on payroll or send the first contractor payment.
Vendor Forms, Licenses, Credit, and Financing
Customers may request a Form W-9 before paying you. You can usually provide the EIN instead of your Social Security number when the business is the proper payee. Licensing offices, payment processors, insurers, and marketplaces may also ask for it.
Lenders and commercial credit bureaus use several data points, and the EIN helps identify the company across them. It does not create business credit on its own. DailyDime’s business credit score guide explains the longer game.
How to Get an EIN From the IRS
Apply directly through the IRS after you form any legal entity with your state. The online application is free and usually issues the EIN immediately when approved. You must complete it in one session, and the site ends a session after 15 minutes of inactivity.
Form the Entity With Your State
If you are creating an LLC, partnership, corporation, or tax-exempt organization, finish the state formation first. Use the approved legal name on the EIN application. Applying too early can create a mismatch or delay.
This order matters because the EIN does not form your company. If you are still choosing the structure, start with DailyDime’s business structure guide and the broader startup legal guide. Pick the entity, file it with the state, then get the EIN.
Gather the Information Before You Start
The IRS application cannot be saved for later. Have the legal name, trade name, mailing address, entity type, formation date, accounting year-end, and reason for applying ready. You may also need details about expected employees and the business’s main activity.
You will identify a responsible party. This is the person who ultimately owns or controls the entity and its assets. For most small businesses, that is a founder, owner, general partner, or principal officer. A nominee cannot apply as the responsible party.
Use the IRS Online EIN Application
Go to the official IRS EIN application. Confirm that the address ends in IRS.gov before entering personal information. The real application costs nothing.
Choose your entity type carefully because the answer affects later questions. Enter the business name exactly as it appears on the formation record. Then provide the responsible party, explain why you are applying, describe the business activity, and review every answer before submission.
The IRS limits EIN issuance to one per responsible party per day. That rule applies across online, fax, mail, and phone requests. Most founders will never notice it. Formation services creating a stack of entities absolutely will.
Save the Confirmation Notice
When the IRS approves the application, download and save the confirmation notice. Store a copy with your permanent company records and another in secure cloud storage. Banks, payroll companies, lenders, and agencies may request proof, not just the nine digits typed into an email.
Eligible Business Tax Account users may later download a digital CP 575 verification notice. The IRS can also issue Letter 147C to confirm a previously assigned EIN. Saving the original notice is still faster than reconstructing your business history on a phone call.
Choose the Right Application Method
Method | Typical timing | Who should use it | What to know |
Online | Usually immediate | U.S. or U.S. territory applicants who qualify | Free, one session, 15-minute inactivity limit. |
Fax | About 4 business days | Applicants who cannot use the online tool | Send Form SS-4 and include a return fax number. |
About 4 weeks | Applicants who need a paper route | Mail Form SS-4 early and expect the longest wait. | |
Phone | During the call | International applicants only | Domestic applicants cannot receive an EIN by phone. |
Timing and eligibility source: IRS guidance updated in 2026. Processing backlogs can extend paper timelines.
Common EIN Mistakes to Avoid
Most EIN problems begin with doing the right task in the wrong order. The application is not hard, but the record it creates follows the business for years. Five quiet checks now can save a loud afternoon later.
- Do not pay for the number. The IRS issues EINs for free. A paid service may charge for convenience, not for the EIN itself.
- Do not apply before state formation when you are creating a legal entity. The legal name needs to match the approved record.
- Do not select an entity type by instinct. An LLC can be taxed several ways, and the application must reflect the actual setup.
- Do not name a formation service or temporary helper as the responsible party. Use the person who truly owns or controls the entity.
- Do not submit several applications because the confirmation page was slow. One entity should have one EIN.
- Do not lose the confirmation notice. Save it with your operating agreement, formation documents, and tax records.
The sneakiest mistake is treating an EIN as proof that every other filing is finished. It is not a business license, state tax account, S corporation election, or payroll registration. The number is a key. You still have to find the doors.
What to Do After You Receive Your EIN
Use the EIN to build a clean operating foundation. Open the business bank account, set up accounting, register required state tax accounts, and finish payroll setup before the first payday. Then update invoices, W-9 forms, insurance applications, and payment processors where appropriate.
The IRS says you can use the EIN immediately for many business needs, including opening a bank account, applying for licenses, and filing a paper return. Allow up to two weeks before expecting the number to work for electronic tax filing, tax deposits, or the IRS Taxpayer Identification Number Matching Program.
Keep the IRS record current. File Form 8822-B when the business address, location, or responsible party changes. The IRS instructions say you must report a responsible-party change within 60 days.
Finally, connect the paperwork to the financial habits that keep the business alive. EINs are easy. Cash flow is less cooperative. DailyDime’s guide to financial literacy for entrepreneurs covers the numbers you should watch once the company starts moving.
When Do You Need a New EIN?
You generally need a new EIN when ownership or legal structure changes in a way the IRS treats as a new entity. A sole proprietorship that incorporates or enters a partnership usually needs a new number. A buyer that takes over another employer’s business should use its own EIN for employment taxes.
A simple name change, address change, or responsible-party update usually does not require a new EIN. Report the change instead. The exact answer depends on your entity type and transaction, so check the IRS rules before a merger, conversion, purchase, or restructuring.
This is one place where guessing creates a tax identity problem with a long tail. Ask your CPA or attorney before the closing, not after the payroll company rejects a filing.
EIN Questions Founders Ask
Is an EIN the Same as a Tax ID?
An EIN is one type of taxpayer identification number. People often use tax ID and EIN interchangeably in business conversations, but taxpayer IDs also include Social Security numbers and ITINs. Ask which number a form actually requires.
Does an EIN Cost Money?
No. The IRS issues an EIN for free. A third party can charge you to prepare or submit the application, but you do not need that service for a typical small business application.
Can I Get an EIN Before Forming My LLC?
Do not do that. The IRS tells applicants to form an LLC, partnership, corporation, or tax-exempt organization with the state first. Then apply using the exact approved legal name.
Can a Sole Proprietor Get an EIN?
Yes. A sole proprietor can request an EIN even when federal tax rules do not require one. Banking, state registration, hiring plans, or a desire to limit routine use of a Social Security number can justify it.
Can I Use My EIN Immediately?
You can use it immediately for many tasks, including opening a bank account and applying for licenses. The IRS says to allow up to two weeks for electronic filing, electronic tax payments, and taxpayer ID matching.
What If I Lose My EIN?
Check the original IRS notice, prior tax returns, bank records, or license applications. If those fail, an authorized person can call the IRS Business and Specialty Tax Line at 800-829-4933. The IRS may provide the number after verifying your identity.
The Founder Move
Form the entity, gather the facts, and use the IRS website yourself. You can often finish the entire EIN process before a paid filing service finishes explaining its processing fee.
Then save the confirmation notice in two secure places and put the number to work. Open the bank account, connect the books, finish tax registrations, and move on to the harder part: building a business worthy of all that paperwork.