Homepage Blank IRS SS-4 PDF Form
Article Guide

The IRS SS-4 form plays a crucial role in the establishment of a business entity in the United States. This form is primarily used to apply for an Employer Identification Number (EIN), which is essential for various tax-related purposes. Whether you are starting a sole proprietorship, partnership, corporation, or nonprofit organization, completing the SS-4 form is a necessary step in the formation process. The form requires detailed information about the business, including its legal structure, ownership, and purpose. Additionally, applicants must provide identifying information about the responsible party, typically the individual who will manage the business's tax obligations. Understanding the nuances of the SS-4 form can streamline the application process and ensure compliance with IRS regulations. Timely and accurate submission of this form is vital, as it not only facilitates tax reporting but also opens doors for various business opportunities, such as opening bank accounts and applying for licenses. Navigating the intricacies of the SS-4 form is an essential task for any new business owner, making it a key component in the journey toward successful entrepreneurship.

Document Preview

Form SS-4

Application for Employer Identification Number

OMB No. 1545-0003

(For use by employers, corporations, partnerships, trusts, estates, churches,

EIN

(Rev. December 2025)

government agencies, Indian tribal entities, certain individuals, and others.)

 

Department of the Treasury

See separate instructions for each line. Keep a copy for your records.

 

Internal Revenue Service

Go to www.irs.gov/FormSS4 for instructions and the latest information.

 

1Legal name of entity (or individual) for whom the EIN is being requested

clearly.

4a

Mailing address (room, apt., suite no. and street, or P.O. box)

5a

Street address (if different) (Don’t enter a P.O. box.)

 

 

2

Trade name of business (if different from name on line 1)

 

3

Executor, administrator, trustee, “care of” name

 

print

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4b City, state, and ZIP code (if foreign, see instructions)

 

 

 

5b City, state, and ZIP code (if foreign, see instructions)

 

or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type

6

County and state where principal business is located

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7a Name of responsible party

 

 

 

 

 

 

7b SSN, ITIN, or EIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8a Is this application for a limited liability company (LLC)

 

 

 

 

 

 

8b

If 8a is “Yes,” enter the

number

of

 

 

 

(or a foreign equivalent)?

Yes

 

 

No

 

LLC members

 

 

8c

 

If 8a is “Yes,” was the LLC organized in the United States? .

. .

. . . . . . . . . . . .

. . .

Yes

No

9a Type of entity (check only one box). Caution: If 8a is “Yes,” see the instructions for the correct box to check.

 

 

 

 

 

 

 

Sole proprietor (SSN)

 

 

 

 

 

 

 

 

 

Estate (SSN of decedent)

 

 

 

 

 

 

 

 

Partnership

 

 

 

 

 

 

 

Plan administrator (TIN)

 

 

 

 

 

 

 

 

Corporation (enter form number to be filed)

 

 

 

 

 

 

 

 

Trust (TIN of grantor)

 

 

 

 

 

 

 

 

Personal service corporation

 

 

 

 

 

 

 

Military/National Guard

State/local government

 

 

 

 

Church or church-controlled organization

 

 

 

 

 

 

 

Farmers’ cooperative

Federal government

 

 

 

 

Other nonprofit organization (specify)

 

 

 

 

 

 

 

 

REMIC

Indian tribal governments/enterprises

 

 

 

Other (specify)

 

 

 

 

 

 

Group Exemption Number (GEN) if any

 

 

9b

 

If a corporation, name the state or foreign country (if

 

State

 

 

 

 

Foreign country

 

 

 

 

applicable) where incorporated

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10 Reason for applying (check only one box)

 

 

Banking purpose (specify purpose)

 

 

 

 

 

 

 

 

Started new business (specify type)

 

 

Changed type of organization (specify new type)

 

 

 

 

 

 

 

 

 

 

 

 

 

Purchased going business

 

 

 

 

 

 

 

Hired employees (Check the box and see line 13.)

 

 

Created a trust (specify type)

 

 

 

 

 

 

 

 

Compliance with IRS withholding regulations

 

 

Created a pension plan (specify type)

 

 

 

 

 

 

 

Other (specify)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11 Date business started or acquired (month, day, year). See instructions.

 

 

12 Closing month of accounting year

 

 

13Highest number of employees expected in the next 12 months (enter -0- if none). 14 If you expect your employment tax liability to be $1,000 or less in a

If no employees expected, skip line 14.

 

 

full calendar year and want to file Form 944 annually instead of Forms

 

 

 

 

 

941 quarterly, check here. (Your employment tax liability will generally

Agricultural

 

Household

 

Other

be $1,000 or less if you expect to pay $5,000 or less, $6,536 or less if

 

 

 

 

you're in a U.S. territory, in total wages.) If you don't check this box,

 

 

 

 

 

 

 

 

 

 

you must file Form 941 for every quarter

. . . . . .

15First date wages or annuities were paid (month, day, year). Note: If applicant is a withholding agent, enter date income will first be paid to

nonresident alien (month, day, year) . . . . . . . . . . . . . . . . .

16 Check one box that best describes the principal activity of your business.

Health care & social assistance

Wholesale—agent/broker

Construction

Rental & leasing

Transportation & warehousing

Accommodation & food service

Wholesale—other

Retail

Real estate

Manufacturing

Finance & insurance

Other (specify)

 

 

17Indicate principal line of merchandise sold, specific construction work done, products produced, or services provided.

18 Has the applicant entity shown on line 1 ever applied for and received an EIN?

Yes

No

If “Yes,” write previous EIN here

 

 

 

 

 

Complete this section only if you want to authorize the named individual to receive the entity’s EIN and answer questions about the completion of this form.

 

 

 

 

 

 

Third

Designee’s name

 

 

Designee’s telephone number (include area code)

Party

 

 

 

 

 

Designee

 

 

 

 

 

Address and ZIP code

 

 

Designee’s fax number (include area code)

 

 

 

Under penalties of

perjury, I declare that I have examined this application, and to the best of my knowledge and belief, it is true, correct, and complete.

Applicant’s telephone number (include area code)

 

Name and title (type or print clearly)

 

 

 

 

 

 

 

 

Applicant’s fax number (include area code)

 

Signature

Date

 

 

 

 

For Privacy Act and Paperwork Reduction Act Notice, see separate instructions.

Cat. No. 16055N

 

Form SS-4 (Rev. 12-2025) Created 10/17/25

 

Form SS-4 (Rev. 12-2025)

Page 2

See below to determine whether you need an EIN. However, for further information on applying for an EIN, including how to submit an EIN application, see the separate instructions at www.irs.gov/FormSS4.

Do I Need an EIN?

File Form SS-4 if the applicant entity doesn’t already have an EIN but is required to show an EIN on any return, statement, or other document.1 See also the separate instructions for each line on Form SS-4.

IF the applicant...

AND...

THEN...

 

 

 

started a new business

doesn’t currently have (nor expect to have)

complete lines 1, 2, 4a–8a, 8b–c (if applicable), 9a,

 

employees

9b (if applicable), 10–14, and 16–18.

 

 

 

hired (or will hire) employees,

doesn’t already have an EIN

complete lines 1, 2, 4a–6, 7a–b, 8a,

including household employees

 

8b–c (if applicable), 9a, 9b (if applicable), and 10–18.

 

 

 

opened a bank account

needs an EIN for banking purposes only

complete lines 1–5b, 7a–b, 8a, 8b–c

 

 

(if applicable), 9a, 9b (if applicable), 10, and 18.

 

 

 

changed type of organization

either the legal character of the organization or its

complete lines 1–18 (as applicable).

 

ownership changed (for example, you incorporate a

 

 

sole proprietorship or form a partnership)2

 

 

 

 

purchased a going business3

doesn’t already have an EIN

complete lines 1–18 (as applicable).

created a trust

the trust is other than a grantor trust or an IRA

complete lines 1–18 (as applicable).

 

trust4

 

created a pension plan as a

needs an EIN for reporting purposes

complete lines 1, 3, 4a–5b, 7a–b, 9a, 10, and 18.

plan administrator5

 

 

is a foreign person needing an

needs an EIN to complete a Form W-8 (other than

complete lines 1–5b, 7a–b (SSN or ITIN as applicable),

EIN to comply with IRS

Form W-8ECI), avoid withholding on portfolio assets,

8a, 8b–c (if applicable), 9a, 9b (if applicable), 10,

withholding regulations

or claim tax treaty benefits6

and 18.

 

 

 

is administering an estate

needs an EIN to report estate income on Form 1041

complete lines 1–7b, 9a, 10–12, 13–17 (if applicable),

 

 

and 18.

 

 

 

is a withholding agent for

is an agent, broker, fiduciary, manager, tenant, or

complete lines 1, 2, 3 (if applicable), 4a–5b, 7a–b, 8a,

taxes on nonwage income

spouse who is required to file Form 1042, Annual

8b–c (if applicable), 9a, 9b (if applicable), 10, and 18.

paid to an alien (that is,

Withholding Tax Return for U.S. Source Income of

 

individual, corporation, or

Foreign Persons

 

partnership, etc.)

 

 

 

 

 

is a state or local agency

serves as a tax reporting agent for public assistance

complete lines 1, 2, 4a–5b, 7a–b, 9a, 10, and 18.

 

recipients under Rev. Proc. 80-4, 1980-1 C.B. 5817

 

 

 

 

is a single-member LLC (or

needs an EIN to file Form 8832, Entity Classification

complete lines 1–18 (as applicable).

similar single-member entity)

Election, for filing employment tax returns and excise

 

 

tax returns, or for state reporting purposes8, or is a

 

 

foreign-owned U.S. disregarded entity and needs an

 

 

EIN to file Form 5472, Information Return of a 25%

 

 

Foreign-Owned U.S. Corporation or a Foreign

 

 

Corporation Engaged in a U.S. Trade or Business

 

 

 

 

is an S corporation

needs an EIN to file Form 2553, Election by a Small

complete lines 1–18 (as applicable).

 

Business Corporation9

 

1For example, a sole proprietorship or self-employed farmer who establishes a qualified retirement plan, or is required to file excise, employment, alcohol, tobacco, or firearms returns, must have an EIN. A partnership, corporation, REMIC (real estate mortgage investment conduit), nonprofit organization (church, club, etc.), or farmers’ cooperative must use an EIN for any tax-related purpose even if the entity doesn’t have employees.

2However, don’t apply for a new EIN if the existing entity only (a) changed its business name, (b) elected on Form 8832 to change the way it is taxed (or is covered by the default rules), or (c) terminated its partnership status because at least 50% of the total interests in partnership capital and profits were sold or exchanged within a 12- month period. The EIN of the terminated partnership should continue to be used. See Regulations section 301.6109-1(d)(2)(iii).

3Don’t use the EIN of the prior business unless you became the “owner” of a corporation by acquiring its stock.

4However, grantor trusts that don’t file using Optional Method 1 and IRA trusts that are required to file Form 990-T, Exempt Organization Business Income Tax Return, must have an EIN. For more information on grantor trusts, see the Instructions for Form 1041.

5A plan administrator is the person or group of persons specified as the administrator by the instrument under which the plan is operated.

6Entities applying to be a Qualified Intermediary (QI) need a QI-EIN even if they already have an EIN. See Rev. Proc. 2000-12.

7See also Household employer agent in the instructions. Note: State or local agencies may need an EIN for other reasons, for example, hired employees.

8See Disregarded entities in the instructions for details on completing Form SS-4 for an LLC.

9An existing corporation that is electing or revoking S corporation status should use its previously assigned EIN.

Form Specifications

Fact Name Description
Purpose The IRS SS-4 form is used to apply for an Employer Identification Number (EIN).
Who Needs It Businesses, estates, trusts, and certain other entities must file this form to obtain an EIN.
Filing Method The form can be filed online, by mail, or by fax, providing flexibility for applicants.
Processing Time Online applications are typically processed immediately, while mail submissions can take up to four weeks.
Cost There is no fee to file the SS-4 form for an EIN.
State-Specific Forms Some states may require additional forms for business registration; check state-specific regulations.
Governing Law Federal law governs the use of the SS-4 form as part of the Internal Revenue Code.
Importance of Accuracy Providing accurate information on the SS-4 is crucial to avoid delays in obtaining an EIN.

IRS SS-4: Usage Guidelines

Once you have gathered the necessary information, you're ready to fill out the IRS SS-4 form. This form is essential for obtaining an Employer Identification Number (EIN), which is required for various business activities. Follow these steps carefully to ensure accuracy and completeness.

  1. Begin by downloading the IRS SS-4 form from the official IRS website or obtain a hard copy from a local IRS office.
  2. At the top of the form, enter the legal name of your business as it appears on your official documents.
  3. In the next section, provide any trade name or DBA (Doing Business As) if applicable.
  4. Indicate the type of entity you are establishing, such as a sole proprietorship, partnership, corporation, or LLC.
  5. Fill in the responsible party's name and Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN).
  6. Provide the business address, including street, city, state, and ZIP code.
  7. Enter the date your business was started or acquired.
  8. Specify the reason for applying for an EIN, such as starting a new business or hiring employees.
  9. Indicate the number of employees you expect to hire in the next 12 months, if any.
  10. Complete the remaining sections as applicable, including details about your business activities.
  11. Review the form for accuracy and completeness before submitting.
  12. Submit the form by mail, fax, or online, depending on your preference and the IRS guidelines.

After submitting the form, you will receive your EIN, which you can use for various tax and business purposes. Keep the confirmation for your records, as it will be essential for future dealings with the IRS and other entities.

Your Questions, Answered

What is the IRS SS-4 form?

The IRS SS-4 form is an application used to obtain an Employer Identification Number (EIN). This number is essential for businesses, non-profits, and other entities that need to report taxes, hire employees, or open a bank account. The EIN serves as a unique identifier for your business, similar to a Social Security number for individuals.

Who needs to fill out the SS-4 form?

Any business entity that plans to hire employees, operate as a corporation or partnership, or file certain tax returns must fill out the SS-4 form. This includes sole proprietors who wish to establish a separate business identity or those who require an EIN for specific tax purposes.

How do I fill out the SS-4 form?

To complete the SS-4 form, you need to provide basic information about your business. This includes the legal name, trade name (if applicable), the type of entity, and the reason for applying for an EIN. You will also need to include the responsible party's name and Social Security number. Be sure to follow the instructions carefully to avoid delays.

Where can I obtain the SS-4 form?

You can obtain the SS-4 form directly from the IRS website. It is available as a downloadable PDF. Alternatively, you can request a paper form by calling the IRS or visiting a local IRS office. Make sure you are using the most recent version of the form to ensure compliance.

Can I submit the SS-4 form online?

Yes, you can submit the SS-4 form online through the IRS website. The online application process is quick and typically provides your EIN immediately upon completion. This is often the fastest way to obtain your EIN.

How long does it take to receive my EIN after submitting the SS-4 form?

If you submit the SS-4 form online, you will usually receive your EIN immediately. For paper submissions, processing can take up to four weeks. If you need your EIN urgently, the online method is recommended.

Is there a fee to apply for an EIN using the SS-4 form?

No, there is no fee to apply for an EIN using the SS-4 form. The application process is free, and you should be cautious of any services that charge a fee to obtain an EIN on your behalf.

What should I do if I lose my EIN?

If you lose your EIN, you can retrieve it by checking previous tax returns or documents where the number is listed. Alternatively, you can contact the IRS directly for assistance in recovering your EIN. They will require you to verify your identity and may ask for specific information about your business.

Can I apply for multiple EINs?

Generally, each business entity should only have one EIN. However, if you have multiple businesses or if your business structure changes significantly (like converting from a sole proprietorship to a corporation), you may need to apply for a new EIN. It's important to consult the IRS guidelines for specific situations.

What do I do with my EIN once I receive it?

Once you receive your EIN, keep it in a safe place. You will need it for various business activities, including filing tax returns, opening bank accounts, and applying for business licenses. Make sure to provide your EIN on all relevant tax documents to ensure proper processing.

Common mistakes

  1. Incorrect Entity Type Selection: Many individuals mistakenly choose the wrong entity type when filling out the form. This can lead to issues with tax classification and responsibilities. Ensure that you select the correct type, such as sole proprietorship, partnership, or corporation.

  2. Missing Information: Omitting required details is a common error. Fields such as the legal name, address, and taxpayer identification number must be completed. Missing even one piece of information can delay processing.

  3. Inaccurate Employer Identification Number (EIN) Requests: Some applicants request an EIN when they already have one. This can create confusion and complications. Always verify if an EIN has been previously issued before applying again.

  4. Failure to Sign and Date: It’s essential to sign and date the form before submission. Without a signature, the IRS may reject the application. This step is often overlooked but is crucial for processing your request.

Documents used along the form

The IRS SS-4 form is essential for businesses seeking to obtain an Employer Identification Number (EIN). However, several other forms and documents often accompany it during the business registration and tax compliance process. Understanding these documents can help ensure that your business is set up correctly and remains compliant with federal regulations.

  • Form 1040: This is the U.S. Individual Income Tax Return form used by individuals to report their annual income. It is crucial for sole proprietors to file this form to report their business income.
  • Form 1065: Partnerships use this form to report income, deductions, gains, and losses from their operations. It is essential for partnerships to ensure proper tax reporting.
  • Form 1120: Corporations must file this form to report their income, gains, losses, deductions, and credits. It is vital for C corporations to comply with corporate tax requirements.
  • Form 941: Employers use this form to report income taxes, Social Security tax, and Medicare tax withheld from employee wages. It is filed quarterly and is important for payroll compliance.
  • Form W-2: This form is used to report wages paid to employees and the taxes withheld from them. Employers must provide this form to their employees annually.
  • Form W-9: This form is used by businesses to request the Taxpayer Identification Number (TIN) of a contractor or vendor. It helps in reporting payments made to them to the IRS.
  • Form 1099: This form reports various types of income other than wages, salaries, and tips. It is commonly used for independent contractors and freelancers.
  • Form 8832: Entities can use this form to elect how they want to be classified for federal tax purposes. It is important for businesses to choose the correct tax classification.
  • State Tax Registration Forms: Depending on the state, businesses may need to complete additional forms to register for state taxes. Each state has its own requirements, so checking local regulations is essential.

Filing the IRS SS-4 form is just one step in the broader process of establishing a business. Familiarity with these additional forms and documents can significantly aid in navigating the complexities of business operations and compliance. Always consider consulting with a tax professional for personalized advice tailored to your specific situation.

Similar forms

The IRS Form SS-4 is used to apply for an Employer Identification Number (EIN). Several other documents share similarities with the SS-4 in terms of purpose, structure, or the information they require. Here are seven such documents:

  • Form W-9: This form requests taxpayer identification information from individuals and businesses. Like the SS-4, it collects essential details to ensure proper tax reporting.
  • Form 1065: This is used by partnerships to report income, deductions, and other financial information. Both forms require basic identifying information about the entity.
  • Form 1040: The individual income tax return form requires personal information, similar to how the SS-4 gathers details for EIN assignment.
  • Form 990: Nonprofit organizations use this form to report financial information. Both the SS-4 and Form 990 require identification of the organization and its purpose.
  • Form 941: Employers use this form to report income taxes, Social Security tax, and Medicare tax withheld from employee wages. Both forms are essential for managing tax obligations.
  • Form 2553: This form is used by corporations to elect S corporation status. It collects similar information about the business structure and identification.
  • Form 1120: Corporations use this form to report income and calculate taxes owed. Like the SS-4, it requires information about the business entity.

Dos and Don'ts

When filling out the IRS SS-4 form, it’s important to follow certain guidelines to ensure accuracy and efficiency. Here are some things you should and shouldn't do:

  • Do double-check your information for accuracy.
  • Do provide a valid reason for applying for an Employer Identification Number (EIN).
  • Do ensure you have all necessary documentation ready before you start.
  • Do submit the form online for quicker processing.
  • Don't leave any required fields blank.
  • Don't use outdated forms; always use the latest version available.
  • Don't guess your answers; if you're unsure, seek help.
  • Don't forget to sign and date the form before submission.

Misconceptions

The IRS SS-4 form is a crucial document for businesses seeking to obtain an Employer Identification Number (EIN). However, several misconceptions surround this form that can lead to confusion. Below are four common misconceptions and clarifications for each.

  • Misconception 1: The SS-4 form is only for corporations.
  • This is not true. The SS-4 form can be used by various types of entities, including sole proprietors, partnerships, and non-profit organizations. Any business entity that needs an EIN must complete this form, regardless of its structure.

  • Misconception 2: You can only apply for an EIN by mail.
  • Many believe that mailing the SS-4 form is the only option. In reality, the IRS allows applications to be submitted online, by fax, or by mail. The online application is often the fastest method, providing immediate confirmation of the EIN.

  • Misconception 3: The EIN is the same as a Social Security Number (SSN).
  • This misconception can lead to significant confusion. An EIN is specifically for business identification, while an SSN is for individual identification. Businesses must use an EIN for tax purposes, whereas individuals use an SSN for personal tax filings.

  • Misconception 4: You only need to fill out the SS-4 form once.
  • Some individuals think that obtaining an EIN is a one-time process. However, if a business undergoes significant changes—such as a change in ownership or structure—it may need to apply for a new EIN. Keeping track of these changes is essential for compliance.

Key takeaways

Filling out the IRS SS-4 form is an important step for businesses seeking an Employer Identification Number (EIN). Here are key takeaways to keep in mind:

  • The SS-4 form can be completed online, by mail, or by fax.
  • Ensure you provide accurate information about your business structure, such as whether it is a sole proprietorship, partnership, or corporation.
  • Use the correct legal name of your business. This name should match the name registered with your state.
  • If you have multiple owners or partners, include their names and Social Security Numbers (SSNs) on the form.
  • Be prepared to answer questions about the reason for applying for an EIN, such as starting a new business or hiring employees.
  • Double-check all entries for accuracy to avoid delays in processing your application.
  • After submitting the SS-4 form, you will receive your EIN immediately if applying online, or within a few weeks if applying by mail or fax.
  • Keep a copy of the completed form for your records, as it may be needed for future tax filings or business transactions.