IRS Form SS-4 is the application used to request an employer identification number (EIN). Now, with our fillable Form SS-4, you can complete the entire document within your browser and save a copy to your device, with no handwriting or any software to install.
Form SS-4
2025
Monthly top‑searched
Trusted by accountants
Official IRS form
How to Fill Out Form SS-4
- Open the printable Form SS-4
- Input your legal name and entity type
- Add the responsible party's SSN, ITIN, or EIN
- Describe your business and reason for applying
- Compare your entries with a completed Form SS-4 example
- Sign, date, and download
What Is Form SS-4 Used For?
Form SS-4 is used to apply for an employer identification number (EIN), a nine-digit number that identifies your entity to the IRS for tax filing and reporting purposes. Employers and other entities use an EIN on required tax returns and related documents.
Who Should Use Form SS-4?
Form SS-4 should be used by employers and other entities that need an EIN, including corporations, partnerships, nonprofits, estates, certain trusts, LLCs, and sole proprietors. Eligible applicants can obtain an EIN online for free without submitting a paper SS-4, or submit the form by fax or mail; telephone applications are available only to international applicants.
When Is Form SS-4 Due?
Form SS-4 has no fixed annual due date; you should apply before you need an EIN for tax filings, payroll, or a business bank account that requires one. If you apply by mail, the IRS recommends submitting the form at least four to five weeks before you need the number.
What Happens If Form SS-4 Is Not Submitted?
You do not need to submit a paper Form SS-4 if you obtain your EIN online. If you need an EIN but fail to apply, tax filings and business banking may be disrupted. The main Form SS-4 penalties concern is failure to meet related tax obligations, such as timely payroll deposits, which can result in penalties and interest.
How and Where Do I File Form SS-4?
You file Form SS-4 by submitting it via fax or mail using the contact details in the Form SS-4 instructions, or apply online if eligible to receive an EIN immediately upon approval. Fax applicants who provide a return fax number generally receive their EIN within about four business days, while mail applications take approximately four weeks, though delays can occur.
How to Get Your Form SS-4
1Find the fillable Form SS-4 in our library
2Fill it out with your entity and owner details
3Download Form SS-4 to your device
Frequently asked questions
#1. How do I get a blank Form SS-4?
You can get a blank Form SS-4 by accessing it in our editor or by downloading the PDF and printing it out so that you can fill it out physically. It’s ready for completion in seconds!
#2. Can I submit Form SS-4 electronically?
You can apply for an EIN online, but you cannot upload a completed Form SS-4 to the IRS website. Eligible applicants can use the IRS online application during its operating hours and receive an EIN immediately upon approval. If you apply using a completed Form SS-4, submit it by fax or mail.
#3. What if my Form SS-4 is missing information?
If your Form SS-4 is missing information, that may delay processing or prompt the IRS to request additional details. Complete all required fields and check the IRS instructions before submission. If the responsible party has no SSN or ITIN and is ineligible to obtain one, enter “foreign” or “N/A” on line 7b.
#4. Can I fill out my Form SS-4 online?
Yes, you can fill out Form SS-4 online with our editor; type into the fields, review your entries, and download the finished PDF. You can then fax or mail it to the IRS in no time.
#5. Is this form free?
Yes, Form SS-4 is free to open and enter your details in. Still, downloading the final version requires you to sign up for a paid subscription.
#6. Can I correct mistakes on Form SS-4?
Yes, you can correct mistakes on Form SS-4, but the process depends on the error and whether you have already submitted the form. Correct any errors before submission; afterward, contact the IRS business and specialty tax line for guidance. If you already have an EIN, use Form 8822-B to report changes to your address, business location, or responsible party.
#7. How long does it take to process Form SS-4?
The process usually takes about four business days by fax if you provide a return fax number, or approximately four weeks by mail; that’s how much time needs to pass before you get your EIN. Still, eligible online applicants receive an EIN immediately upon approval. Processing delays can occur, so apply early if you have an upcoming deadline.