Here is a worry we hear from almost every investor who has done things “the right way”: “I hold my rentals in an LLC for liability protection, so does that shrink or complicate a cost segregation study?” It is a fair question, and the answer relieves most people. The entity you hold title in almost never changes the size of your depreciation deduction. Depreciation is computed on the property’s basis, and an LLC does not change the basis. What the entity changes is the plumbing: which tax return the deduction shows up on, and whose hands it ends up in.
Does putting your rental in an LLC change your cost segregation deduction?
No. A study reclassifies the building’s depreciable basis into faster depreciation buckets, and that basis, the purchase price minus land, is identical whether you hold the house in your own name, a single-member LLC, or a multi-member one. A single-member LLC is a “disregarded entity” for federal income tax: the IRS looks straight through it to you, the rental lands on your Schedule E exactly as if you owned it personally, and the cost segregation result is the same to the dollar. The LLC is doing real work on the liability side, but that is a legal question for your attorney, not a tax one, and it is invisible to your depreciation. Do not let “it’s already in an LLC” talk you out of running the numbers.
Single-member LLC vs. partnership: where the deduction actually lands.
The fork in the road is how many owners the LLC has. One owner is disregarded, and the deduction flows onto your 1040 Schedule E (a married couple in a community-property state can elect to be treated the same way). Two or more owners, and the LLC files a partnership return, Form 1065, and issues each owner a Schedule K-1. The accelerated depreciation is computed once at the partnership level, then allocated to the partners by their ownership percentages, or by whatever split the operating agreement specifies. Each partner carries their slice onto their own return. The total deduction does not grow or shrink; it just arrives divided.
The math on a $600K rental held in a two-member LLC.
Say two investors form a two-member LLC, taxed as a partnership, split 50/50, and buy a $600,000 short-term rental. Land is allocated at 20% of the price, or $120,000, which leaves $480,000 of depreciable building basis. A typical residential study reclassifies roughly 25% of that basis, about $120,000, out of the slow 27.5-year bucket and into 5-, 7-, and 15-year property: appliances, flooring, cabinetry, dedicated electrical and plumbing, the driveway, fencing, and landscaping.
Because 100% bonus depreciation is back for property acquired after January 19, 2025 (the OBBBA change we covered here), that entire $120,000 is deductible in the first year rather than dripping out over decades. The partnership passes it through 50/50, so each partner’s K-1 shows a $60,000 accelerated depreciation slice. If each partner materially participates in the short-term rental, that $60,000 can offset other income; at a 32% marginal federal rate, that is about $19,200 in first-year federal tax savings per partner, roughly $38,400 across the two of them, before any state benefit. The LLC did not create or destroy a dollar of that deduction. It only decided the write-off arrived in two equal halves.
Who can actually use the loss? The K-1 meets each owner's participation.
Generating the deduction and using it are two different questions, and inside a partnership the second one is answered owner by owner. A K-1 loss is still subject to each partner’s own passive-activity rules. One partner might materially participate, through short-term-rental participation or real estate professional status, and use the loss against W-2 or business income this year. Another partner in the very same deal might be purely passive, in which case their slice is not lost, it banks as a suspended passive loss and releases against future passive income or when the property sells. Same house, same study, two different outcomes, decided by each owner’s hours and facts rather than by the LLC. The entity routes the water; it does not change how much there is. Your CPA is the right person to confirm which bucket each owner lands in.
Does an S-corp or any other wrapper change the study itself?
No. The study looks at the building, not the wrapper around it. Whether the property sits in a disregarded LLC, a partnership, or an S-corp, the documentary, cost-library-based reclassification and the resulting 5-, 7-, and 15-year schedules are the same, and the report is built to be audit-ready either way. What differs is only how the deduction reaches a return and how each owner may use it. Holding appreciating real estate in an S-corp carries its own tax tradeoffs that have nothing to do with cost segregation, so treat that as an entity-planning conversation for your CPA. And if you are moving a property into an entity now, or have owned it for several years, loop your CPA in on the timing, because prior-year depreciation questions belong on their desk.
The takeaway for investors who hold in an entity.
Holding a rental in an LLC is a sensible, common structure, and it does nothing to weaken the case for a cost segregation study. The deduction is sized to the building’s basis, not to your entity. A single-member LLC is invisible to the math; a partnership simply splits the result across K-1s, where each owner’s participation decides who can use it and when. Run your own numbers on the savings estimate, and if it looks worth a closer look, run the free instant estimate. It shows your projected savings and your flat study fee before any payment, and we will give you a candid yes or no. There are properties where a study does not pencil, and we will tell you when yours is one of them.