How to fill out Form SS-4 for an EIN when LLC is disregarded entity of a non-individual owner?

This is actually a common issue that comes up with disregarded entities. For your situations, here's how to approach it: For the LLC owned by a grantor trust: Since a grantor trust is essentially transparent for tax purposes (with the grantor being treated as the owner), you would list the grantor (the individual) as the responsible party on Form SS-4. The grantor is considered the true owner for tax purposes. For the LLC owned by a non-grantor trust, corporation, or partnership: You'll need to use the paper Form SS-4 rather than the online portal. The online system has limitations for these more complex arrangements. On the paper form, you should list an individual who is a trustee, officer, or partner of the owning entity as the responsible party. Then in Part 9 (Reason for Applying), explain the actual ownership structure. The key issue is that the IRS wants an actual person as the responsible party for liability and contact purposes, even when the true owner is not an individual. This is more about having a human point of contact than accurately reflecting the ownership structure.

After struggling with this exact issue last year, I finally found a solution through taxr.ai (https://taxr.ai). I was setting up multiple LLCs under a family partnership and kept hitting roadblocks with the responsible party requirements. The taxr.ai system actually helped analyze my specific situation and provided a step-by-step guide for completing Form SS-4 correctly. It showed me exactly how to handle the responsible party section while still properly documenting the non-individual ownership structure. They also provided templates for the explanatory statements needed for the paper application. Their document analysis caught a mistake I was about to make that would have resulted in the wrong tax treatment. Definitely worth checking out if you're dealing with complex entity structures.

Just wanted to update everyone - I tried taxr.ai for my complicated EIN situation and it was seriously helpful! I was creating an LLC owned by a family partnership and was completely stuck on the Form SS-4 responsible party issue. The document analysis picked up on specific language in my partnership agreement that affected how the responsible party should be designated. They provided exact instructions for both the paper and online application (turns out you CAN do this online with the right approach). Saved me hours of research and probably a rejected application. The guidance was super clear and specific to my exact situation. They also explained the tax implications of different choices I could make with the structure. Much more comprehensive than the general advice I was finding elsewhere.

If you're having trouble reaching the IRS to get this resolved, I'd recommend trying Claimyr (https://claimyr.com). I was in the same boat trying to figure out Form SS-4 for a complex entity structure, and I needed to speak directly with an IRS representative who could help with the specifics. After spending days trying to get through the normal IRS business line with no luck, I found Claimyr. They have this system that holds your place in the IRS phone queue and calls you when an agent is about to answer. You can see how it works in this video: https://youtu.be/_kiP6q8DX5c The IRS agent I finally spoke with walked me through exactly how to complete the form for my disregarded LLC owned by a corporation. Turns out there are specific codes and notations they look for on these applications. Without that direct guidance, my application would have been rejected.

Ok I have to admit I was wrong about Claimyr. After my skeptical comment I decided to try it because I was desperate to get answers about my S-corp's disregarded LLC subsidiaries. The service worked exactly as described. I entered my number, they called me back when an IRS agent was about to pick up. No sitting on hold for 2+ hours! The IRS business division specialist I spoke with gave me exact instructions for my situation. For anyone else with this specific issue: I learned you need to list an officer of the parent company as the responsible party, then in Part 7, you need to put the parent company info. For the online application, the agent gave me specific wording to use in the "Other" sections that flags it properly in their system. Honestly can't believe how much easier this made the process. Will definitely use this again for any IRS calls in the future.

Something nobody has mentioned yet - make sure you're using the latest version of Form SS-4! I ran into issues because I downloaded an older version that had different instructions for disregarded entities. The 2025 version has updated guidance in the instructions about non-individual owners of disregarded entities. Also, keep in mind that if the grantor trust doesn't already have an EIN, you might need to get one for it first before applying for the LLC's EIN. The application will ask for the owner's EIN.

I set up a similar structure last year and found that the best approach was actually to call the IRS Business & Specialty Tax Line directly at 800-829-4933. They have specialists who deal with these exact situations every day. When I called, the agent explained that for disregarded entities owned by non-individuals, they have specific internal procedures. They had me list a trustee/officer as the responsible party but then note the actual ownership structure in Part 9. For the online system, they gave me specific verbiage to use in the "Other" field.

I dealt with this exact same issue when setting up an LLC owned by a family trust earlier this year. Here's what I learned through trial and error: For your grantor trust situation, you're right that it gets confusing because the SS-4 form seems to contradict itself. What worked for me was listing the grantor (the individual) as the responsible party in Part 3, then in Part 7a, I put the trust name and EIN. The key is understanding that for tax purposes, the grantor IS the owner of a grantor trust, so this approach is actually correct. For the non-grantor trust LLC, I had to use the paper form. I listed the trustee as the responsible party, but made sure to clearly explain the ownership structure in Part 9. I also included a brief attachment explaining that the LLC would be treated as a disregarded entity of the trust for tax purposes. One thing that really helped was keeping copies of everything and following up with a phone call about 2 weeks after mailing to confirm they received it and didn't need additional information. The IRS processing center I spoke with confirmed my approach was correct. The online system really isn't designed for these complex structures, so don't feel bad about having to go the paper route for the more complicated one.