When Does a Cost Segregation Study NOT Make Sense for a Mobile Home Park?

Most of the content you will find about cost segregation is written to sell cost segregation studies. The benefits are highlighted. The complexity is minimized. The scenarios where it doesn’t work are glossed over or omitted entirely.

That is not how we operate. The MHP Accountant® gives you an honest picture — because building a long-term client relationship on advice that only works sometimes is not a foundation either of us wants.

Cost segregation is a powerful tool for the right park in the right situation. For the wrong situation, it costs you money on a study, creates depreciation deductions you cannot use, and sets up a recapture problem at sale that is larger than the benefit you received. Knowing when not to do something is as valuable as knowing when to do it.

Here are the scenarios where a cost segregation study for an MHP does not make financial sense — and why.

Scenario 1: High Land Value Relative to Improvements

Land is not depreciable. Full stop. The depreciation benefit from a cost segregation study comes entirely from reclassifying the improvement basis — the portion of your purchase price that is not land — into shorter MACRS categories.

If you own a park in a market where land values have appreciated significantly, or if you purchased a park where the appraiser allocated a large percentage of value to the underlying land, your depreciable improvement basis may be small. A cost segregation study on a property where land represents 65–70% or more of total purchase price may yield a reclassification pool that doesn’t justify the study cost.

The math here is straightforward. Your MHP accountant can estimate the reclassification potential before you hire the engineer. If the improvement basis is modest and the applicable bonus depreciation rate is reduced or the deductions would be passive, the economics may not work. Know the numbers first.

Scenario 2: No Taxable Income to Offset

A cost segregation study generates larger depreciation deductions in the early years of ownership. That is only valuable if you have income to offset. If your overall tax picture shows minimal taxable income — whether because the park is breaking even operationally, because you have other losses, or because this is a startup year — additional depreciation deductions may not save you money in the current year.

Some owners look at this and say, “I’ll generate a loss that carries forward.” That is not inherently wrong — loss carryforwards do have future value. But the time-value calculation changes significantly. A loss carryforward that sits unused for five years is worth substantially less than a deduction that saves you taxes in the current year. The discount rate matters.

More importantly, if you already have substantial existing losses that you have been unable to use — either from this park or from other real estate investments — adding more losses to the pile rarely helps your current tax position. Optimizing the losses you have is often more important than generating new ones.

Scenario 3: Passive Activity Limitations Block Current Use

Depreciation deductions from real estate activities are generally passive losses under IRC Section 469. Passive losses can only offset passive income — you cannot use them to offset W-2 wages, business income, or portfolio income unless you qualify for a specific exception.

The main exception that allows real estate losses to offset non-passive income is the real estate professional exception under IRC Section 469(c)(7). To qualify, you must spend more than 750 hours per year in real estate activities and more than 50% of your personal service time in real property trades or businesses. This is a facts-and-circumstances test, and the IRS scrutinizes these claims closely.

If you do not qualify as a real estate professional, and you do not have other passive income to absorb the losses, the additional depreciation from cost segregation simply accumulates as a passive loss carryforward. The deductions exist on paper but provide no current tax benefit. In that situation, you have paid for a study, generated complexity, and created losses you cannot use until you either generate passive income or sell the property.

There is also a $25,000 passive loss allowance for active participants with modified adjusted gross income under certain thresholds — but this is a narrow exception and the income phase-out limits may eliminate it entirely if your income is above those thresholds. See the relevant income limits under IRS Publication 925 for the current passive activity rules.

Scenario 4: You Are Selling in the Near Term

When you sell a mobile home park, the depreciation deductions you have taken come back through recapture. Section 1245 recapture applies to personal property (including POHs and equipment) and taxes the gain up to the amount of depreciation taken at ordinary income rates — your full marginal rate, which may be in the highest bracket. Section 1250 unrecaptured gain applies to real property and is taxed at a maximum rate of 25%.

Cost segregation accelerates depreciation. That means it accelerates recapture at sale. If you took large first-year deductions through bonus depreciation on 5-year and 15-year assets, and then sell the property 18 months later, a substantial portion of your sale proceeds will be recaptured at ordinary income rates.

The question is whether the present-value benefit of having the deductions earlier outweighs the recapture cost at sale, given the short holding period. For very short holds — under two years — the math frequently does not favor cost segregation. The deductions came at a 37% marginal rate benefit, and the recapture comes at a 37% marginal rate cost, just 18 months later. The present-value advantage is minimal, and you have paid for a study on top of it.

A 1031 exchange defers recapture — but only if the exchange is successfully completed. If you intend to sell and roll proceeds into a new park through a 1031, the recapture math changes. But if you plan a clean sale without an exchange, scrutinize the cost segregation economics carefully before doing the study.

Scenario 5: The Park Is Too Small

Cost segregation studies have a minimum economics threshold. Qualified studies — site visit, detailed engineering analysis, defensible written report — have meaningful costs. If the total improvement basis being analyzed is relatively modest, the present-value benefit of the reclassification may not exceed the study cost.

This is not a universal threshold that applies to every park or every study firm. But for a small park with a limited improvement basis, where a significant portion of value is in the land and POHs (already 5-year property), the amount of basis that can be reclassified from 27.5-year to 15-year may generate an incremental depreciation benefit in year one that does not justify the engineering and reporting cost.

Your MHP accountant can estimate the reclassification potential before you hire an engineer. If that estimate — discounted for taxes, holding period, and present value — doesn’t clearly exceed the study cost with room to spare, the study is not worth pursuing at this time.

The Scenario Where It Might Make Sense Later

Several of the above scenarios are timing issues, not permanent disqualifications. If you have passive loss carryforwards you can’t use now, but you are planning to acquire additional passive income-generating assets in the near future, cost segregation on your existing park may pair well with that future income. The order of operations matters.

Similarly, if you own a small park today but are planning to acquire larger parks that will produce significant taxable income, you might defer cost segregation on the small park until you have the income to absorb the deductions. Or you might use the lookback study procedure on the small park in a future year when the passive income is available. Our guide to cost segregation on new vs. existing MHPs covers the lookback study mechanics in detail.

A Comparison: When Cost Segregation Pencils Out vs. When It Doesn’t

What This Means for How You Choose Your Advisor

An advisor who only recommends cost segregation — who never models the scenarios where it doesn’t work — is either not doing the full analysis or is being paid to refer study work. The honest answer is that for some MHP owners in some years, straight-line depreciation is simply the correct approach.

The MHP Accountant® will tell you when a cost segregation study doesn’t pencil out. We will also tell you when the timing could be better — defer to a future year when you have the income, or until the holdback study makes more economic sense. See our full comparison of straight-line vs. cost segregation depreciation for the complete decision framework.

If your situation does justify a study, the next step is finding the right engineer for MHP work. Our guide to finding a qualified cost segregation engineer for your mobile home park covers what to look for, what questions to ask, and what red flags to avoid.

Frequently Asked Questions

Disclaimer: This post is for educational purposes only and does not constitute tax, legal, or financial advice. Tax laws change and individual circumstances vary. Consult a qualified tax professional before making any decisions based on information in this article. The MHP Accountant® is an enrolled agent firm; services do not include legal advice.