FEIN Registration Guide for Businesses

Why You Need an FEIN 

Before your business can register for sales and use tax accounts in the United States, you must first obtain a Federal Employer Identification Number (FEIN) from the IRS. This is a mandatory requirement for all businesses operating in the U.S.

While Taxually does not provide FEIN registration services, we have created this comprehensive guide to help you navigate the process. We've included step-by-step instructions, helpful resources, and video tutorials to make the process as straightforward as possible.

Application Resources

Required Form and Instructions: 

• Form SS-4: Download the official IRS Form SS-4
• Filing Instructions: Where to submit your completed form
• IRS Contact Information: Find your local IRS office contact details

Helpful Video Resource(s): 

• General FEIN Application: Accountant Explains: How To Get An EIN For Your Business 2025 - A comprehensive walkthrough of the entire process, specifically for non-resident owners 

Important Tips for Non-U.S. Entities 

Responsible Party Requirements: The IRS requires you to identify a responsible party on your application. For non-U.S. entities, this person does not need to be a U.S. citizen or resident, but they must have authority over your business's financial decisions.

Accuracy is Critical: Carefully ensure that all business details on your FEIN application exactly match your incorporation documents. This includes your business name, address, and other identifying information. Any errors or inconsistencies will require corrections, which can significantly delay your ability to register for state sales and use tax accounts. 

Processing Timeframes: 

• Faxed Applications: Typically processed within 4 business days. However, faxed applications can occasionally be delayed or lost. If you haven't received your FEIN within one week, have a corporate officer call the IRS to follow up on your request.
• Mailed Applications: Allow 4-6 weeks for processing when submitting by mail.

Need Additional Help?

If you don't feel comfortable completing the FEIN registration process on your own after reviewing this guide and the provided resources, Taxually can recommend qualified tax professionals who specialize in FEIN applications and can assist you through the process.

Contact your primary contact at Taxually if you'd like a referral to a trusted tax professional in your area. If you do not have a primary contact, you can contact us at lumatax@taxually.com.