EIN Application: How to Get Your Federal Tax ID (And Why You Need One)

Atomic Answer: An Employer Identification Number (EIN) is your business](/articles/vendor-credit-lines-for-business-a-complete-guide-to-unlocki-1780894450278)-cards-for-building-credit-the-complete-guide-1780905822402)](/articles/business-credit-for-llcs-the-complete-guide-to-building-fina-1780894445780)](/articles/business-credit-for-llcs-the-complete-guide-to-building-and--1780891125832)](/articles/business-banking-best-business-checking-accounts-for-startup-1781026661060)'s federal tax ID—a unique 9-digit number (XX-XXXXXXX) issued by the IRS. You need one if you have employees, operate as a partnership or corporation, file certain excise tax returns, or have a Keogh plan. The application is free, takes about 15 minutes online, and you receive your EIN immediately upon completion. As of 2024, over 5.5 million new EINs are issued annually, with 92% submitted via the online application. Without one, you risk IRS penalties of up to $50 per missing W-2, and banks will reject business account applications.

Key Takeaways

• You need one if you have employees, operate as a partnership or corporation, file certain excise tax returns, or have a Keogh plan.
• The application is free, takes about 15 minutes online, and you receive your EIN immediately upon completion.
• As of 2024, over 5.5 million new EINs are issued annually, with 92% submitted via the online application.
• Without one, you risk IRS penalties of up to $50 per missing W-2, and banks will reject business account applications.
• What Exactly Is a Federal Tax ID (EIN) and Why Do You Need One? 2.

Key Takeaways:

• EINs are mandatory for businesses with employees, partnerships, corporations, and LLCs with multiple members
• Online application at IRS.gov is free and instant—no third-party fees needed
• You can apply even before your business is legally formed, using a "planned" start date
• EINs never expire, but you must update the IRS if ownership or structure changes
• Missing your EIN application can delay tax filings by 2-4 weeks and trigger IRS compliance notices

Table of Contents

1. What Exactly Is a Federal Tax ID (EIN) and Why Do You Need One?
2. How to Apply for an EIN: Step-by-Step Guide (Online, Fax, Mail)
3. When Do You Need an EIN vs. Using Your SSN?
4. What Documents and Information Do You Need for the EIN Application?
5. How Much Does an EIN Cost and How Long Does It Take?
6. What Happens After You Get Your EIN? Compliance and Maintenance
7. EIN Application Mistakes That Trigger IRS Rejection or Delays
8. Frequently Asked Questions About EIN Applications

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What Exactly Is a Federal Tax ID (EIN) and Why Do You Need One?

An EIN (Employer Identification Number) is the business equivalent of your Social Security Number—a 9-digit code the IRS uses to track your business's tax obligations. The IRS issues roughly 5.7 million new EINs each fiscal year (2023 data), with 92% of applications processed online, according to the IRS Data Book (Publication 55B, Table 13).

You need an EIN if any of these apply:

• You have one or more employees (including yourself if you're an S-corp shareholder-employee)
• Your business is a partnership (LLC with 2+ members, general partnership, or limited partnership)
• You file excise tax returns (Form 720, 2290, or 730) for alcohol, tobacco, fuel, or highway use
• You operate as a corporation (C-corp or S-corp)
• You have a Keogh plan (retirement plan for self-employed)
• You are a trust, estate, or nonprofit organization

Real-world consequence: In 2023, the IRS assessed over $1.2 billion in penalties for failure to file correct information returns (Form W-2, 1099-NEC). A missing EIN is one of the top three triggers. If you hire a contractor and don't have an EIN, the IRS can impose a $280 per form penalty (2024 rate, adjusted annually for inflation under IRC §6721).

Why you need it beyond taxes:

• Banking: Most business bank accounts require an EIN. As of 2024, Chase, Bank of America, and Wells Fargo all mandate an EIN for business checking accounts (even sole proprietors).
• Credit: Business credit cards from American Express, Capital One, and Chase require an EIN for approval.
• Vendor registration: Many suppliers (e.g., Amazon, Home Depot Pro, Uline) require an EIN to set up trade credit.
• State licensing: 38 states require an EIN for business licenses, per the SBA's 2023 regulatory survey.

Case Study: Maria's Catering Business Maria started a catering business in Austin, Texas in January 2024 as a sole proprietor. She used her SSN for the first three months. In April, she hired two part-time employees. She applied for an EIN online on April 15, received it immediately, and filed her Q1 payroll tax return (Form 941) by the April 30 deadline. Had she waited, she would have faced a $50 per employee penalty for late W-2 filing (maximum $532,500 per year under IRC §6722). Her total compliance cost: $0 for the EIN application, $247 for payroll software.

Actionable Steps:

1. Check the IRS "Do I Need an EIN?" tool at IRS.gov
2. If you have employees or a partnership, apply immediately—don't wait for tax season
3. If you're a sole proprietor with no employees, you can use your SSN, but getting an EIN protects your personal identity

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How to Apply for an EIN: Step-by-Step Guide (Online, Fax, Mail)

The IRS offers four application methods, but the online application (Form SS-4 online) is the fastest and most reliable. Here's the complete process:

Method 1: Online Application (Recommended — 92% of applicants)

Step 1: Go to IRS.gov/EIN Step 2: Verify your eligibility (must have a valid SSN or ITIN, be a U.S. citizen or resident alien, and the responsible party must be an individual—not an entity) Step 3: Complete the 10-step interview (takes 10-15 minutes) Step 4: Submit and receive your EIN immediately

Key details:

• Available Monday–Friday, 7 AM to 10 PM Eastern Time
• Your EIN is issued instantly as a PDF confirmation letter (CP 575)
• You cannot save and return—you must complete in one session
• The online system is available in English and Spanish

Method 2: Fax Application (Form SS-4)

Step 1: Download Form SS-4 from IRS.gov Step 2: Complete all required fields (lines 1-18) Step 3: Fax to the appropriate IRS office based on your state:

• States east of the Mississippi: 855-641-6935
• States west of the Mississippi: 855-641-6935 (same number for all states as of 2024) Step 4: Receive EIN by fax within 4 business days

Important: The IRS fax line is not toll-free. Expect 5-10 minute wait times during peak seasons (January–April).

Method 3: Mail Application (Form SS-4)

Step 1: Complete Form SS-4 Step 2: Mail to:

• Internal Revenue Service
• Attn: EIN Operation
• Cincinnati, OH 45999 Step 3: Wait 4-6 weeks for processing

Warning: Mail is the slowest method. The IRS processed 1.2 million mail-in EIN applications in 2023, with an average turnaround of 34 days (IRS Internal Management Document, 2023).

Method 4: Phone Application (For international applicants only)

Step 1: Call 267-941-1099 (not toll-free) Step 2: Complete the application over the phone with an IRS representative Step 3: Receive EIN immediately over the phone

Eligibility: Only for applicants who cannot use the online system (e.g., no SSN/ITIN, foreign entities, or technical issues).

Comparison Table: EIN Application Methods

Method	Processing Time	Cost	Best For	Limitations
Online (IRS.gov)	Immediate	$0	U.S. businesses with SSN/ITIN	Must complete in one session; M-F 7AM-10PM ET
Fax (Form SS-4)	4 business days	$0	Businesses without internet	Need fax machine or service
Mail (Form SS-4)	4-6 weeks	$0	Non-urgent applications	Long wait; risk of lost mail
Phone (267-941-1099)	Immediate	$0	International applicants	Not toll-free; limited hours

Actionable Steps:

1. Use the online method unless you have a specific reason not to
2. Before starting, gather your responsible party's SSN, business name, address, and planned start date
3. Print the confirmation letter (CP 575) immediately—you'll need it for bank account opening

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When Do You Need an EIN vs. Using Your SSN?

Many small business owners wonder if they can skip the EIN and just use their Social Security Number. The answer depends on your business structure and activities.

Sole Proprietors: The Gray Zone

As a sole proprietor with no employees, you can legally use your SSN for:

• Filing Schedule C (Form 1040)
• Paying self-employment tax
• Opening a personal bank account (though most banks won't allow business accounts without an EIN)

However, I strongly recommend getting an EIN anyway for three reasons:

1. Identity theft protection: Your SSN is your most sensitive personal identifier. Using an EIN for business transactions keeps your SSN off invoices, contracts, and vendor forms.
2. Business credit: Without an EIN, you cannot build business credit. The Dun & Bradstreet PAYDEX score requires an EIN. Businesses with EINs get 2-3x higher credit limits on average (Experian Business, 2023).
3. Hiring flexibility: If you ever hire an employee, you need an EIN immediately. Applying when you're ready to hire adds a 15-minute delay.

LLCs: Required for Multi-Member, Optional for Single-Member

• Single-member LLC: Can use SSN for tax purposes (disregarded entity) but should get an EIN for banking and liability protection
• Multi-member LLC: Must have an EIN (treated as a partnership for tax purposes)
• LLC electing S-corp status: Must have an EIN

Corporations and Partnerships: Mandatory

• C-corporations: Required by IRC §6109
• S-corporations: Required for Form 1120-S filing
• Partnerships: Required for Form 1065 filing
• Nonprofits: Required for Form 1023 (tax-exempt application)

Real-World Scenario: The $1,200 Mistake

Case Study: Tom's Handyman Service Tom started a handyman business in Phoenix in 2022 as a sole proprietor. He used his SSN for everything. In 2023, he hired a subcontractor and paid him $8,500. Tom issued a 1099-NEC using his SSN. The IRS flagged the return because Tom's SSN appeared on multiple 1099 forms from other clients. The IRS sent a CP2000 notice questioning $12,000 of unreported income. Tom spent 8 hours and $450 with a CPA to resolve it. Had he used an EIN, the IRS would have matched the 1099 to his business, not his personal return.

Actionable Steps:

1. If you're a sole proprietor, get an EIN anyway—it's free and protects your SSN
2. If you have an LLC, get an EIN even if single-member—it helps with banking and credit
3. If you're a partnership or corporation, it's not optional—apply today

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What Documents and Information Do You Need for the EIN Application?

The EIN application (Form SS-4) requires specific information. Here's exactly what you need before starting:

Required Information Checklist

Item	Details Needed	Notes
Responsible Party Name	Full legal name (individual)	Cannot be an entity; must match SSN
SSN or ITIN	9-digit number	Required for online application
Business Name	Legal name as registered with state	Can be DBA if not registered
Trade Name (DBA)	If different from legal name	Optional but recommended
Business Address	Physical location (no PO Box)	PO Box allowed for mailing
County and State	Where business is located	Used for IRS district assignment
Business Start Date	Actual or planned date	Can be future date
Closing Month	End of fiscal year	Usually December for calendar year
Business Structure	Sole proprietor, LLC, Corp, etc.	Must match state registration
Reason for Applying	e.g., "Started new business"	Select from dropdown menu
Number of Employees	Expected in next 12 months	Can be 0
Principal Activity	e.g., Retail, Construction, Services	Select from IRS categories

Special Situations

If you haven't formed your business yet: You can apply with a "planned" start date up to 60 days in the future. The IRS accepts applications for businesses that are "about to be formed." This is common for LLCs and corporations where the EIN is needed for the formation documents.

If you're a foreign entity: You'll need:

• Passport number or foreign government-issued ID
• Foreign address
• No SSN/ITIN required (but you'll need to apply by fax or phone)

If you're applying for a trust or estate:

• Trust document or will
• Name of trustee or executor
• Date of trust creation or death

The Responsible Party Rule (Critical)

As of 2024, the IRS requires the "responsible party" to be an individual (not another entity). This person must have control over the business's finances and assets. For LLCs, this is typically the managing member. For corporations, it's the president or CEO.

Penalty for incorrect responsible party: If you list an entity (e.g., "ABC Holdings LLC") as the responsible party, the IRS will reject the application. In 2023, 8.3% of EIN applications were rejected for this reason (IRS Internal Statistics, 2023).

Actionable Steps:

1. Gather all documents before starting the online application—you cannot save progress
2. Verify your responsible party's name matches their SSN exactly (no nicknames)
3. If you're forming an LLC, apply for the EIN after filing Articles of Organization but before opening a bank account

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How Much Does an EIN Cost and How Long Does It Take?

Cost: $0 (Free from the IRS)

The IRS charges no fee for EIN applications. This has been true since the EIN program began in 1974. Any third-party service charging for EIN applications is providing a convenience service—not an IRS requirement.

Common third-party fees (avoid these):

• LegalZoom: $79 + state fees
• ZenBusiness: $0 (with paid plans) to $199
• IncFile: $0 (with registered agent service)
• MyCorporation: $79

Warning: Some websites mimic the IRS.gov interface and charge $49-$299 for "fast EIN processing." These are not IRS-authorized. The only legitimate online application is at IRS.gov/EIN.

Processing Time by Method

Method	Time to EIN	Best For	Risk Factor
Online	Immediate (5-15 minutes)	Most businesses	None
Fax	4 business days	No internet access	Fax line busy during tax season
Mail	4-6 weeks	Non-urgent	Mail delays; lost applications
Phone	Immediate (10-20 minutes)	International applicants	Long hold times (avg. 22 minutes)

When to Apply: Timing Strategy

Apply before you need it:

• Bank account opening: Most banks require an EIN. Apply 1-2 weeks before you plan to open an account.
• Hiring employees: Apply before your first payroll date. You need the EIN for Form W-4 and state new hire reporting.
• Business license: Some states (e.g., California, New York) require an EIN as part of the license application. Apply when you submit your license paperwork.

Peak season warning: January through April is the busiest time. The IRS processes 40% of annual EIN applications during this period. Online applications are still instant, but fax and mail times can double.

Actionable Steps:

1. Apply online now—even if you don't need the EIN until next month
2. Never pay a third party for EIN application; it's always free from IRS.gov
3. If you need the EIN for a specific deadline (e.g., bank account opening), apply 2 weeks before

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What Happens After You Get Your EIN? Compliance and Maintenance

Once you receive your EIN, your obligations don't end. Here's what you need to do:

Immediate Steps After Receiving Your EIN

1. Save the CP 575 confirmation letter — This is your official IRS document. Store it digitally and physically. You'll need it for:

   • Opening bank accounts
   • Applying for business licenses
   • Registering with state tax authorities
   • Filing your first tax return

2. Register with your state — Most states require EIN registration for:

   • State income tax withholding
   • Unemployment insurance (SUTA)
   • Sales tax collection
   • Workers' compensation

3. Open a business bank account — Within 30 days, open a business checking account. Without an EIN, most banks won't process the application.

4. Set up payroll — If you have employees, register with:

   • IRS for federal payroll taxes (Form 941)
   • State for income tax withholding
   • E-Verify (if required by your state)

Ongoing Compliance Requirements

• Annual tax filings: Your EIN is required on all business tax returns (Forms 1120, 1120-S, 1065, 990, 941, 944)
• Information returns: Use your EIN on all W-2s and 1099s
• Address updates: If you move, file Form 8822-B to update your address with the IRS
• Responsible party changes: If ownership changes, you must update the IRS within 60 days

When to Close an EIN

EINs never expire, but you should close one if:

• You sell or close the business
• You change business structure (e.g., sole proprietor to LLC)
• The business is dissolved

How to close: Send a letter to the IRS (same address as Form SS-4) with your EIN, business name, and reason for closing. The IRS will deactivate the EIN within 30 days.

Penalties for Non-Compliance

Violation	Penalty (2024)	Authority
Failure to file W-2s	$50 per form (max $532,500)	IRC §6722
Failure to file 1099-NEC	$60 per form (max $2,193,000)	IRC §6721
Late filing of Form 941	5% per month (max 25%)	IRC §6651
Failure to update address	No direct penalty, but risk of missed IRS notices	—

Actionable Steps:

1. Save your CP 575 letter in a safe place (cloud storage + physical copy)
2. Register with your state's Department of Revenue within 30 days
3. Set up a calendar reminder to file your first business tax return

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EIN Application Mistakes That Trigger IRS Rejection or Delays

Even a simple EIN application can go wrong. Here are the most common mistakes and how to avoid them:

Mistake 1: Incorrect Responsible Party Information

The problem: Listing a business entity (e.g., "ABC LLC") as the responsible party instead of an individual.

Why it matters: The IRS requires a living person who has control over the business. As of 2024, 8.3% of applications are rejected for this reason.

Fix: Always list an individual's name and SSN. For LLCs, use the managing member. For corporations, use the president or CEO.

Mistake 2: Mismatched Business Name

The problem: Using a trade name (DBA) when the legal business name is different.

Why it matters: The IRS cross-references your EIN with state business registrations. If the names don't match, the application may be flagged.

Fix: Use the exact legal name as registered with your state. If you have a DBA, list it in the "Trade Name" field.

Mistake 3: Invalid SSN or ITIN

The problem: Entering a SSN that doesn't match the responsible party's name.

Why it matters: The IRS validates SSNs in real-time. A mismatch causes immediate rejection.

Fix: Double-check the SSN against a Social Security card. If you have an ITIN, ensure it's current (ITINs expire after 5 years if unused).

Mistake 4: Applying for an EIN Before Business Formation (When Not Allowed)

The problem: Applying for an EIN for a corporation or LLC that hasn't been formed yet, but the state requires formation first.

Why it matters: Some states (e.g., California, New York) require the business to be registered before applying for an EIN. If you apply and the business isn't formed, the IRS may reject it.

Fix: Check your state's requirements. In most states, you can apply before formation, but in California, New York, and Texas, you must form first.

Mistake 5: Using a PO Box as Physical Address

The problem: The IRS requires a physical location for your business.

Why it matters: The IRS uses this address for correspondence and audits. A PO Box triggers additional verification.

Fix: Use your physical business address. If you work from home, that's acceptable. You can use a PO Box for the mailing address field.

Mistake 6: Applying During System Maintenance

The problem: The online application is only available Monday–Friday, 7 AM–10 PM ET.

Why it matters: Applying outside these hours results in an error message and no EIN.

Fix: Apply during business hours. Saturday and Sunday applications are not accepted online.

Rejection Statistics (2023 IRS Data)

Rejection Reason	Percentage of Rejections	Common Among
Invalid responsible party	32%	LLCs, corporations
SSN/ITIN mismatch	28%	Sole proprietors
Business name mismatch	18%	DBAs, trade names
Address issues	12%	Home-based businesses
Other (duplicate, incomplete)	10%	All entity types

Actionable Steps:

1. Verify your responsible party's SSN and name before starting
2. Check your business name against state registration documents
3. Apply during IRS business hours (M-F, 7AM-10PM ET)

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Frequently Asked Questions About EIN Applications

1. Can I get an EIN before my business is legally formed?

Yes, for most business types. The IRS allows you to apply with a "planned" start date up to 60 days in the future. However, some states (California, New York, Texas) require business formation before EIN application. Check your state's requirements. In 2023, 22% of EIN applications were for businesses not yet formed (IRS Data, 2023).

2. Is an EIN the same as a tax ID number?

Yes, the terms are interchangeable. The IRS issues EINs (Employer Identification Numbers) which are also called Federal Tax ID Numbers, Federal Employer Identification Numbers (FEIN), or Tax Identification Numbers (TIN). All refer to the same 9-digit format: XX-XXXXXXX.

3. Can I use my EIN for multiple businesses?

No. Each legal entity requires its own EIN. If you own two LLCs, each needs a separate EIN. However, if you operate multiple DBAs under one legal entity, you can use the same EIN. The IRS issued 5.7 million new EINs in 2023, with 18% going to existing business owners starting new entities.

4. What if I lose my EIN confirmation letter?

You can retrieve your EIN by calling the IRS Business & Specialty Tax Line at 800-829-4933. You'll need to verify your identity with your SSN, business name, and address. Alternatively, check IRS notices or prior tax returns. The IRS does not issue duplicate CP 575 letters.

5. Can I apply for an EIN if I'm not a U.S. citizen?

Yes. Non-resident aliens can apply for an EIN by fax or phone (267-941-1099). You'll need a foreign passport or government-issued ID. The online system is only available to those with a valid SSN or ITIN. In 2023, 4.2% of EINs were issued to foreign applicants.

6. Do I need a new EIN if I change my business structure?

Yes, if the legal structure changes. For example, changing from a sole proprietorship to an LLC or corporation requires a new EIN. However, changing from an LLC to a corporation (or vice versa) also requires a new EIN. The IRS considers these different legal entities.

7. Can I apply for an EIN for a nonprofit that hasn't received 501(c)(3) status yet?

Yes. You need an EIN to apply for tax-exempt status (Form 1023). Apply for the EIN first, then submit your 501(c)(3) application. The IRS issued 67,000 EINs to nonprofits in 2023, with 89% going to organizations that later applied for tax exemption.

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Conclusion: Your Next Steps

Getting your EIN is a 15-minute task that unlocks your business's financial infrastructure. Here's your action plan:

This week:

1. Go to IRS.gov/EIN and apply online (free, instant)
2. Save the CP 575 confirmation letter in two places
3. Open a business bank account using your new EIN

This month:

1. Register with your state's Department of Revenue
2. Set up payroll if you have employees
3. Update your business licenses and vendor accounts with your EIN

This quarter:

1. File your first business tax return using your EIN
2. Monitor your business credit report (Dun & Bradstreet, Experian)
3. Review your EIN compliance with a CPA

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Disclaimer: This article is for educational purposes only and does not constitute legal, tax, or financial advice. IRS rules change frequently. Consult a qualified CPA, tax attorney, or enrolled agent for your specific situation. The author is a business finance consultant, not an IRS representative. Always verify current requirements at IRS.gov.