How the Cost Segregation Guarantee Actually Works

What the Guarantee Actually Says

The guarantee is simple to state and specific on purpose. Our study identifies at least 20 times its fee in first-year deductions on commercial property, or at least 30 times its fee on a short-term rental, or the study is free. Two numbers enter the comparison: the fee charged for the engineered report, and the first-year deductions that report identifies. Nothing else moves the calculation.

First-year deductions mean two things depending on when the property was acquired. For a fresh purchase, it is the increased depreciation the study's component classification produces in the first year the property is placed in service. For a property owned for years, a look-back study, it is the section 481(a) catch-up deduction, meaning the missed depreciation now claimed in the current tax year through Form 3115, plus that year's own increased depreciation. Either way, the number measured against the fee comes straight off the finished engineered report, not off a projection.

Why the Estimate Comes Before the Guarantee

The guarantee only makes sense in the order it actually happens. A free Preliminary Benefit Estimate models the building's likely first-year acceleration before an owner pays anything, using the property type, basis, and acquisition details available upfront. That estimate is a projection, built to be directionally right. It is not the number the guarantee is measured against.

The guarantee itself is checked against the finished engineered report, after our engineering team has classified the property's actual components, run the section 481(a) computation if it is a look-back, and produced the report. The estimate gets an owner to a decision point. The guarantee is what happens once the real number exists.

What Happens if a Study Misses the Floor

If the finished report's first-year deductions do not clear 20 times the fee on a commercial property, or 30 times on a short-term rental, the study is free. That is the entire consequence, stated plainly rather than hedged. There is no partial-credit structure to describe here, because the guarantee is the whole mechanism: clear the floor, or the fee is waived.

In practice this outcome is rare. Real delivered studies routinely clear the floor by a wide margin; see cost segregation cost versus benefit for actual examples. The floor exists as a downside boundary, not a typical outcome.

Why a Multiple-of-Fee Guarantee Is the Honest Version

A guarantee has to be pinned to something. Basis ties it to a multiple of its own fee rather than to a flat dollar promise or a projected tax outcome, because a multiple of the fee is the one number that scales correctly regardless of the property. A flat guarantee amount would be arbitrary on a small residential property and meaningless on a large commercial building. A promise about a reader's tax outcome would depend on facts the guarantee has no way to know, income, filing status, other passive activity, that belong to the owner's own return.

Tying the guarantee to the fee also means it moves in the same direction as the actual cost. A study priced higher because the building is larger or more complex also has to clear a bigger deduction to hit the same multiple. See how cost segregation companies typically charge for the pricing model this guarantee sits on top of.

Why the STR Floor Sits Higher Than the Commercial Floor

The two floors are not arbitrary. A short-term rental study is smaller in scope, and its fee is correspondingly smaller and more standardized than a commercial engineering engagement. A high multiple is a realistic floor on a smaller, more uniform job. A commercial study scales with a much larger and more variable building, so its floor sits lower in multiple terms while often representing a far larger absolute deduction. Smaller multiple, bigger dollars, on the commercial side; bigger multiple, smaller dollars, on the residential side. The two numbers describe two different kinds of engineering jobs, not two different levels of confidence in the underlying work.

This is also why the guarantee is stated as two floors rather than one number that applies everywhere. A single floor calibrated to a small residential rental would be unreachable on some commercial buildings, and a single floor calibrated to commercial work would be trivially easy on most residential studies. Two floors, matched to two different kinds of properties, keep the guarantee meaningful on both sides of the business rather than easy on one side and pointless on the other.

What the Guarantee Does Not Promise

The guarantee measures one thing: whether the report's first-year deductions clear a stated multiple of the fee. It does not promise what an owner will owe in taxes this year, since that depends on income, filing status, and how the deduction interacts with the passive activity rules, questions for the owner's own CPA. It does not promise cash in hand, since a deduction lowers taxable income rather than depositing money directly. And it does not promise an audit outcome. Our study includes full audit defense of the report by the team that produced it, meaning the engineers who built it answer an examiner's technical questions about it, but that is defense of the report, not a promise about whether an examination happens or how it resolves. The client's own CPA still represents the client throughout.

Where the Guarantee Sits in the Decision

An owner deciding whether to commission a study does not need to guess whether the guarantee will matter, because the free estimate answers the more useful question first: what this specific building's number looks like. The 60-second qualifier at /qualify starts that estimate. The guarantee then sits underneath the decision as a floor, not as the reason to move forward. The reason to move forward is the projected number itself; the guarantee is what protects the downside if the finished engineering comes in lower than expected.

Frequently asked questions

Does the guarantee apply the same way to a look-back study as a new purchase?

Yes. The comparison is always the fee against first-year deductions, whether those deductions come from a fresh purchase's year-one depreciation or a look-back study's section 481(a) catch-up plus that year's depreciation. The mechanism does not change based on how long the property has been owned.

Is the guarantee floor the same for commercial and residential properties?

No. The floor is at least 20 times the fee in first-year deductions on commercial property, and at least 30 times on a short-term rental. The higher multiple on residential reflects how the smaller, more standardized fee on that side of the business tends to produce a larger ratio.

Does the guarantee mean an owner will get a tax refund?

No. The guarantee measures the report's first-year deductions against its fee, not what happens on a tax return. Whether a deduction produces a refund, offsets other income, or carries forward as a suspended loss depends on the owner's own tax situation, a question for their CPA.

Who decides whether a study cleared the guarantee floor?

The comparison runs on numbers the finished engineered report itself produces, the classified first-year deductions against the fee charged. Both figures are visible in the report and the invoice, so the multiple is a plain calculation rather than a judgment call.

Does the guarantee cover what happens if the study is examined?

No. Our study includes full audit defense of the report itself, meaning the team that built it answers an examiner's technical questions about the methodology and classifications. That is separate from the guarantee, which only measures first-year deductions against the fee, and separate from representation of the taxpayer, which stays with the owner's own CPA.

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