Cost Segregation on an Owner-Occupied Practice Building: The Self-Rental Trap

When a practice owner holds the building in a separate LLC and rents it to the operating entity, IRC Sec. 469 treats that arrangement as a self-rental. A cost segregation study can generate a large first-year loss in the property LLC, but without a grouping election under Treas. Reg. 1.469-4(d)(1) that loss is passive and cannot offset practice income.

Owning the building your practice operates out of is one of the most common wealth-building moves a physician, dentist, orthodontist, or veterinarian makes. The usual structure is two entities: an operating company that bills patients, and a separate LLC that owns the real estate and leases it to the operating company. It is clean, it protects the building from practice liability, and it builds equity outside the practice.

It also creates a tax trap that a cost segregation study will walk you straight into if nobody is coordinating the two entities.

Why the Building Is a Strong Cost Segregation Candidate

Medical, dental, and veterinary buildings carry an unusually high proportion of short-life property. A general office building might reclassify 20 to 25 percent of its depreciable basis out of the 39-year bucket. A purpose-built clinical space frequently reaches 30 to 40 percent, because so much of the buildout is not structural.

The components that typically reclassify to five-year or seven-year IRC Sec. 1245 personal property include:

• Dedicated electrical circuits and isolated power feeding imaging equipment, chair units, and autoclaves
• Medical gas piping, vacuum lines, and compressed air distribution
• Operatory casework, millwork, and built-in cabinetry that is not a structural component
• Dedicated plumbing serving specific equipment rather than the building generally
• Decorative lighting, wall coverings, and specialty flooring in treatment and reception areas
• Lead shielding and radiology room finishes tied to a specific machine

Site work reclassifies separately into the 15-year land improvement class under IRC Sec. 168(e): parking lot, curbing, site lighting, signage, landscaping, and drainage. On a suburban practice building with its own lot, land improvements alone are often eight to twelve percent of basis.

Everything that lands in the five, seven, and fifteen-year classes is then eligible for bonus depreciation under IRC Sec. 168(k), which the One Big Beautiful Bill Act restored to 100 percent on a permanent basis. That is the mechanism that turns a study into a first-year deduction rather than a modest schedule change.

Where the Structure Breaks

Here is the problem. The deduction lands in the property LLC. Your income is in the operating company. Those are two different activities for passive loss purposes, and IRC Sec. 469 governs whether a loss in one can offset income in the other.

Rental activity is passive per se under IRC Sec. 469(c)(2). So the property LLC generates a passive loss, the practice generates non-passive income, and the loss suspends. You carry it forward until the rental produces passive income or until you dispose of the property in a fully taxable transaction under IRC Sec. 469(g). You have paid for an engineering study and received a deduction you cannot currently use.

The self-rental rule in Treas. Reg. 1.469-2(f)(6) makes this worse rather than better. That rule recharacterizes net rental income from property rented to an activity in which the taxpayer materially participates as non-passive. It does not do the reverse. A self-rental that produces income is non-passive and cannot be sheltered by other passive losses; a self-rental that produces a loss stays passive. The rule is deliberately asymmetric, and cost segregation puts you on the losing side of it.

The Grouping Election

The fix is the grouping election under Treas. Reg. 1.469-4(d)(1). A rental activity may be grouped with a trade or business activity if the two constitute an appropriate economic unit and the rental is insubstantial in relation to the business, or the business is insubstantial in relation to the rental, or each owner of the trade or business has the same proportionate ownership interest in the rental activity.

That third test is the one most practice owners meet. If you own 100 percent of the practice and 100 percent of the building LLC, or the same partners own both in the same ratios, the ownership test is satisfied. Group the two activities and they become a single activity for Sec. 469 purposes. You materially participate in the practice, so you materially participate in the combined activity, and the depreciation loss from the building is non-passive. It offsets practice income directly.

Three points that matter in practice:

• The election is disclosed, not filed on a form. Treas. Reg. 1.469-4(e) and Rev. Proc. 2010-13 require a written statement with the return identifying the activities being grouped. It is a statement, but it is not optional.
• Grouping is generally binding in later years. You cannot regroup at will. Once activities are grouped, they stay grouped unless the original grouping was clearly inappropriate or there has been a material change in facts.
• Ownership ratios have to actually match. Practices where one partner owns a larger share of the building than of the practice frequently fail the test. This is worth checking before the study is commissioned, not after.

Sequencing Matters More Than the Study

The order of operations on a practice building is straightforward once you see it, and expensive when it runs backwards:

1. Confirm the ownership percentages in the operating entity and the property entity actually align.
2. Make the grouping election, with the required disclosure statement, for the year in question.
3. Commission the engineering-based cost segregation study.
4. If the building has been in service for several years without a study, file Form 3115 to claim the missed depreciation as a IRC Sec. 481(a) adjustment in the current year rather than amending prior returns.
5. Model the state consequence. A number of states decouple from bonus depreciation, so the federal and state results diverge.

The Form 3115 route is the one most practice owners do not know about. If you bought or built the building six years ago and have been taking straight-line 39-year depreciation the whole time, you do not have to amend six returns. An automatic accounting method change captures the entire cumulative difference between what you claimed and what you could have claimed, and deducts it in the current year.

What This Is Worth

On a $2.4 million dental building with a purpose-built clinical fitout, a study that reclassifies 34 percent of depreciable basis into short-life property produces roughly $700,000 of accelerated deduction in year one under 100 percent bonus. For an owner in the top federal bracket with state tax on top, that is a mid-six-figure cash tax reduction, and it is the difference between a deduction you can use and one that sits suspended on a carryforward schedule.

The study is the easy part. The grouping election is what determines whether the deduction reaches your income.

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This article is for informational purposes only and does not constitute legal or tax advice. Consult a qualified tax professional regarding your specific circumstances. AE Tax Advisors, 935 Lake Elmo Dr, Suite B, Billings, MT 59105. Phone: (631) 614-5762.

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