You might have two business entities, and you want to combine them but they are also very different. For example, you are a realtor and your spouse is an IT consultant. We could create a holding LLC called Smith Ventures which owns the realtor LLC and the IT consultant LLC. In other words, the realtor LLC and IT consultant LLC have a single-member, and that single-member is the holding LLC.
The holding LLC would then make the S Corp election, and all the LLC income would flow into the S corporation as wholly owned subsidiaries. Remember, single-member LLCs are disregarded entities and are reported on the sole member’s tax return. In this case the sole member is the S corporation.
You might be saying, “Yeah, but, why not just have two S Corps?” You can, and in some situations you must (like an attorney and doctor as a married couple). The downside is the additional costs in tax return preparation and payroll processing. Conversely in the arrangement above, all the payroll for the shareholders is handled out of a single S Corp. Each single-member LLC (SMLLC) is a disregarded entity and therefore only a singular tax return is required at the S corporation level.
Another benefit is that one of these business units, subsidiaries or whatever you want to call them can be carved away and later sold off. You could also expand ownership in one without expanding ownership in the whole structure (we’ll show this later in the chapter).
On to the minor inconveniences. Each entity should have its own checking account and set of books. Common expenses such as an umbrella policy or tax preparation fees would be paid at the S corporation level, while subsidiary-specific expenses such as website hosting would be paid at the LLC level.
Also, if you want to take a distribution out of one of the subsidiaries, truly the S corporation would receive the distribution first, and then make another distribution to you, the shareholder. A double hop. In other words, transfer money from the SMLLC’s checking accounting to the S corporation’s checking account to your checking account.
Another inconvenience is that each entity might be slapped with high annual fees from the state in the form of filing fees, or franchise taxes (like California) or both. The benefits might still outweigh the costs, but be careful.
This is a common strategy between husband and wife teams where the business entities are completely different, yet the household wants to enjoy the benefits of an S corporation.
Side Bar: We must analyze limitations in each of the subsidiary LLCs. For example, you cannot have an LLC that would be deemed a hobby tucked under the “protection” of an S Corp. Each LLC must have a profit motive. There might other limitations at the LLC level, but the hobby loss limitation is a wonderful illustrative point.
By having separate LLCs, both initially owned by an S corporation, you can accomplish various ownership expansions, such as adding a third party as a co-owner of one of your subsidiaries (MMLLC in the diagram above). In other words, the MMLLC would have two members; your S corporation and the other guy. The other guy could be an S corporation as well. In this scheme you would need two business tax returns; a Form 1120S for the S Corp and a Form 1065 for the MMLLC (Partnership Tax Return). Your S Corp would receive a K-1.
401k plans have all kinds of rules on controlled groups and discrimination rules, and we’ll explore more of that later in this chapter. However, if a husband owns SMLLC A and wife owns SMLLC B, each business can have a separate 401k plan. One could be filled with employees, and the other is just a solo 401k plan. This is provided that the spouses don’t participate in each other’s business.
Taxpayer's Comprehensive Guide to LLCs and S Corps : 2019 Edition