If you’re starting a business in the United States or managing taxes as a non-U.S. resident, one of the first things you’ll likely need is an EIN number. But once you realize you need one, the next question is usually straightforward: what is the fastest way to get an EIN number?
The answer depends on your situation, especially whether you have a Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN). In this guide, we’ll walk you through the fastest options, what to expect, and how to avoid delays.
What Is an EIN Number?
Before jumping into timelines, it’s important to understand what an EIN number actually is.
An Employer Identification Number (EIN), issued by the Internal Revenue Service, is a federal tax ID used to identify a business entity. In many ways, it functions like a Social Security Number, but for a business.
You may need an EIN number if you:
- Start a company (LLC, corporation, partnership)
- Contratar empleados
- Open a U.S. business bank account
- File certain tax returns
The Fastest Way to Get an EIN Number
1. Apply Online Through the IRS (Fastest Option)
If you’re eligible, the fastest way to get an EIN number is by applying directly through the IRS online system.
Processing time: Immediate (you receive your EIN instantly)
To use the online EIN application, you must:
- Have a valid SSN or ITIN
- Be located in the U.S. or U.S. territories
- Be the responsible party for the business
Once you complete the application, your EIN is issued right away. This is by far the quickest method available.
2. Apply by Fax (Best Alternative for Non-U.S. Applicants)
If you don’t have an SSN or ITIN (which is common for non-U.S. residents) you cannot use the online system. In this case, applying by fax is usually the fastest alternative.
Processing time: Typically 4–7 business days
You’ll need to submit Form SS-4 to the IRS, making sure all details are accurate. Errors or missing information can delay your EIN number application.
3. Apply by Mail (Slowest Option)
You can also apply by mailing Form SS-4 to the IRS.
Processing time: Around 4–6 weeks
This method is generally not recommended if you’re trying to move quickly, as it significantly delays business formation or tax compliance steps.
How Long Does It Take to Get an EIN Number?
The timeline depends on how you apply:
- Online application: immediate
- Fax application: about one week
- Mail application: up to six weeks
So when people ask how long it takes to get an EIN number, the real answer is: it can be instant, or it can take over a month.
Common Mistakes That Slow Down the Process
Even though getting an EIN can be quick, certain mistakes can delay your application:
- Incorrect or inconsistent business information
- Leaving required fields blank on Form SS-4
- Applying multiple times for the same entity
- Using the wrong entity structure
These issues often lead to confusion later when trying to verify or look up an EIN number.
Can Non-U.S. Citizens Get an EIN Number Quickly?
Yes, non-U.S. citizens can still obtain an EIN number, even without an SSN.
However, since they cannot apply online, the process typically takes a few days longer. Many international founders choose to work with professionals to ensure the application is completed correctly the first time and avoid delays.
What Happens After You Get Your EIN?
Once your EIN is issued, you’ll receive a confirmation letter (CP 575). This document is important, you’ll need it when:
- Opening a U.S. bank account
- Filing taxes
- Verifying your EIN number later
If you ever need to find your EIN number, you can usually locate it on IRS documents, previous tax filings, or official correspondence.
Final Thoughts
Getting an EIN number doesn’t have to be complicated. If you’re eligible for the online system, you can receive it within minutes. If not, fax submission remains a reliable and relatively fast alternative.
The key is preparation. Making sure your information is accurate and your application is properly completed can make the difference between getting your EIN immediately or waiting weeks.
Need Help Getting an EIN?
At ITIN, we help individuals, entrepreneurs, and international founders navigate the EIN application process smoothly and efficiently.
If you’re unsure how to apply for an EIN number, or want to avoid delays, our team can guide you through the process and help you get it right the first time.
