The IRS SS-4 form is an application used to obtain an Employer Identification Number (EIN), which is essential for businesses and certain organizations. This form is crucial for tax administration and helps the IRS identify taxpayers. To begin the process of acquiring your EIN, fill out the form by clicking the button below.
The IRS SS-4 form is an essential document for anyone looking to establish a business entity in the United States. This form is primarily used to apply for an Employer Identification Number (EIN), which is crucial for tax purposes and helps identify your business. Completing the SS-4 form correctly can streamline your interactions with the IRS and ensure compliance with federal regulations. The form requires basic information about your business, including its legal structure, the reason for applying, and details about the responsible party. Whether you are starting a sole proprietorship, partnership, corporation, or nonprofit organization, understanding the nuances of the SS-4 form can significantly impact your business operations. Additionally, knowing when and how to submit the form can save you time and potential complications down the road. Overall, the IRS SS-4 form is a foundational step in the journey of establishing and running a business in the U.S.
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? .
. .
. . . . . . . . . . . .
. . .
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)
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
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?
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
created a trust
the trust is other than a grantor trust or an IRA
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),
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
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
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.
After completing the IRS SS-4 form, you will submit it to the IRS to obtain your Employer Identification Number (EIN). This number is essential for various business activities, including tax reporting and hiring employees. Follow the steps below to accurately fill out the form.
What is the IRS SS-4 form?
The IRS SS-4 form is an application used to apply for an Employer Identification Number (EIN). This number is essential for businesses, as it serves as a unique identifier for tax purposes. Organizations, sole proprietors, and partnerships often need an EIN to open a business bank account, file tax returns, or hire employees.
Who needs to fill out the SS-4 form?
Any business entity that requires an EIN must complete the SS-4 form. This includes:
How can I submit the SS-4 form?
The SS-4 form can be submitted in several ways:
Each method has its own processing times, with online applications typically processed immediately.
What information is required on the SS-4 form?
When filling out the SS-4 form, you will need to provide:
Ensure that all information is accurate to avoid delays in processing.
Is there a fee to apply for an EIN using the SS-4 form?
No, there is no fee to apply for an EIN. The IRS provides this service free of charge. Be cautious of third-party services that may charge a fee for filing the SS-4 form on your behalf.
How long does it take to receive my EIN after submitting the SS-4 form?
Processing times can vary based on the submission method:
Once your application is processed, you will receive your EIN confirmation.
Filling out the IRS SS-4 form, which is used to apply for an Employer Identification Number (EIN), can be a straightforward process. However, many people make common mistakes that can delay their application or lead to complications down the line. Understanding these pitfalls can help ensure a smoother experience.
One frequent error is providing incorrect or incomplete information. The form requires specific details about your business, such as its legal name and address. Omitting any information or making typographical errors can result in processing delays. Always double-check the details before submitting.
Another mistake is failing to select the appropriate entity type. The IRS recognizes various business structures, including sole proprietorships, partnerships, and corporations. Choosing the wrong type can lead to tax implications and additional paperwork. Take time to understand the distinctions and select the option that accurately reflects your business.
Some applicants overlook the necessity of a responsible party. The form requires the name and Social Security number (SSN) of an individual who controls the business. Neglecting to include this information can cause the application to be rejected. Ensure that the responsible party is clearly identified and that their information is accurate.
Many people also make the mistake of not providing a valid reason for applying for an EIN. The form asks for the purpose of obtaining an EIN, such as starting a new business or hiring employees. Providing a vague or incorrect reason can lead to questions from the IRS. Be clear and specific about your intentions.
In addition, applicants sometimes fail to sign and date the form. A missing signature can result in the IRS considering the application incomplete. Always ensure that the form is signed by the responsible party and dated appropriately before submission.
Another common oversight is not submitting the form in the correct manner. While the SS-4 can be submitted online, by mail, or by fax, each method has its own requirements. For instance, if submitting by mail, ensure that you send it to the correct address based on your location. Misaddressing your application can lead to delays.
Some individuals do not keep a copy of the completed form. Retaining a copy is essential for your records and can be useful if any issues arise later. Having documentation of your submission can help clarify any discrepancies in the future.
Lastly, many applicants underestimate the importance of following up. After submission, it is wise to check the status of your application if you do not receive confirmation within a reasonable timeframe. Proactive follow-up can help you address any potential issues before they escalate.
The IRS SS-4 form is essential for businesses seeking to obtain an Employer Identification Number (EIN). However, several other forms and documents may accompany it during the application process or for related purposes. Below is a list of these forms, each playing a unique role in business operations and compliance.
Understanding these forms and their purposes can streamline the process of setting up and managing a business. Each document has its significance, ensuring compliance with tax regulations and facilitating proper reporting. Keeping these forms organized and accessible is crucial for smooth business operations.
The IRS SS-4 form is an important document for businesses, particularly when applying for an Employer Identification Number (EIN). It shares similarities with several other forms. Here’s a list of six documents that are comparable to the SS-4 form:
Each of these forms plays a significant role in the tax process, ensuring that the IRS has the necessary information to manage tax compliance effectively.
When filling out the IRS SS-4 form, it's important to get it right to avoid delays in obtaining your Employer Identification Number (EIN). Here’s a list of things you should and shouldn’t do:
Following these guidelines will help ensure a smooth application process for your EIN.
The IRS SS-4 form is essential for obtaining an Employer Identification Number (EIN). However, several misconceptions surround its purpose and requirements. Here are five common misunderstandings:
Many believe that only corporations or partnerships require an EIN. In reality, individuals, estates, and trusts may also need to file this form to obtain an EIN for tax purposes.
Some think that mailing the SS-4 is the only option. However, it can also be submitted online, by fax, or by phone, depending on the applicant's circumstances.
It is a common belief that submitting the SS-4 automatically results in an EIN. In fact, the IRS may deny the application if the information provided is incomplete or inaccurate.
Many assume that there is a cost associated with filing the SS-4. This is incorrect; the form is free to file, and there are no associated fees for obtaining an EIN.
Some individuals believe that an EIN is permanent and unchanging. However, certain situations, such as changes in business structure or ownership, may require a new EIN to be issued.
Understanding these misconceptions can help ensure proper compliance and streamline the process of obtaining an EIN.
The IRS SS-4 form is essential for businesses applying for an Employer Identification Number (EIN). Here are key takeaways to consider when filling out and using this form: