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What a cost segregation study costs, and when it pays for itself

Typical fee ranges, what drives them, how to estimate the benefit before commissioning one, and the situations where the study is not worth it.

By Sankha NagChoudhurySeptember 17, 20267 min read

A cost segregation study reclassifies parts of a building from a long depreciation life into much shorter ones, pulling deductions forward. The engineering work costs real money, so the only sensible question is whether the accelerated deduction is worth more to you than the fee — this year, at your rate, given your loss limits.

What drives the fee

Pricing is set by the work required, not by your tax saving. A small residential rental is a fraction of the cost of a multi-building industrial site.

  • Property type and complexity: a warehouse has far fewer components to itemise than a restaurant or a medical clinic.
  • Square footage, number of buildings, and whether construction records exist.
  • Engineering-based studies with a site visit cost more than desktop or modelled studies, and stand up better under examination.
  • Look-back studies on property placed in service in earlier years require a Form 3115 accounting-method change, adding preparer fees.

Estimating the benefit before you commit

Most reputable providers will run a free feasibility estimate showing the share of basis likely to be reallocated into five-, seven-, and fifteen-year lives. Turn that into a number before signing.

  • Take the depreciable basis, excluding land — land is never depreciable.
  • Apply the estimated reallocation percentage to get the accelerated basis.
  • Multiply by your marginal rate for a rough first-year benefit, then compare against the quoted fee plus the added preparation cost.

When it usually does not pay

The study can be technically valid and still be a waste of money if you cannot use the deductions.

  • Passive rental losses you cannot deduct against other income, absent real estate professional status or active participation.
  • Excess business loss limits already capping what you can use this year.
  • A short expected hold period, where depreciation recapture on sale erases the timing advantage.
  • Low basis: below a few hundred thousand dollars of depreciable basis, the fee often swallows the benefit.

Choosing a provider

This is an engineering report that must survive scrutiny. Cheap and undocumented is the expensive option.

  • Ask for a sample report, the methodology used, and whether audit defence is included in the fee.
  • Confirm the study follows the IRS Audit Techniques Guide approach for cost segregation.
  • Avoid providers whose fee is a percentage of your tax saving.

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Educational guidance, not personal advice. Outputs are illustrative, may contain errors, and should be independently verified before material decisions.

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