# Form SS-4

URL: https://pdf.net/pdf-forms/tax-forms/form-ss-4
Category: Tax Forms
Attributes: Monthly top‑searched, Trusted by accountants, Official IRS form

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.

## Versions

- 2025 — [download PDF](https://cdn.sanity.io/files/i16te7yp/production/0c6be77bbc3e09753a325f4573f926e3f9661e86.pdf)

## How to Fill Out Form SS-4

1. Open the printable Form SS-4
2. Input your legal name and entity type
3. Add the responsible party's SSN, ITIN, or EIN
4. Describe your business and reason for applying
5. Compare your entries with a completed Form SS-4 example
6. Sign, date, and download

## Facts

### 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.