Short answer

A cost segregation study produces depreciation deductions. A deduction reduces taxable income; it does not produce a payment from the government, and it does not reduce tax dollar for dollar. Whether a deduction turns into cash depends on your marginal rate, on whether you can use it this year under the passive activity rules, and on what happens later at sale, when depreciation on the reclassified property is recaptured as ordinary income. Marketing that describes a study's result as "savings" or a "refund" skips all of that. This article explains what a deduction actually does, the rules that decide whether you can use it, and how to read a projection so that the number on the page means what you think it means. It is general education, not tax advice.

What a deduction does

Taxable income is gross income less allowable deductions. Depreciation is a deduction: an annual allowance for the wear and tear of property. A study moves depreciation earlier, so it increases this year's deduction and reduces later years'. The effect on tax is the deduction multiplied by your marginal rate, and only if the deduction can be used.

TermWhat it isWhat it is not
DeductionReduces taxable incomeNot a payment; not a credit
CreditReduces tax directlyCost segregation does not produce credits
RefundMoney returned because you paid more tax than you owed, usually through withholding or estimatesNot created by a deduction on its own; a deduction can make a refund larger only if tax was already paid in
Suspended lossA passive loss you could not use this year, carried forwardNot a saving until it is used

Why the passive activity rules decide most cases

Rental real estate activities are generally passive. Losses from passive activities that exceed passive income are generally not deductible against wages, business income or investment income in the same year; they are suspended and carried forward. Two exceptions matter for owners.

  1. The special allowance. Taxpayers who actively participate in a rental may deduct up to $25,000 of rental loss against other income, phased out between $100,000 and $150,000 of modified adjusted gross income.
  2. Real estate professionals. Taxpayers who meet the real estate professional tests, and who materially participate in the rental activity, are not subject to the passive limitation for those activities.

Everyone else is looking at a suspended loss. A study that creates a large first-year deduction for an owner with substantial wages and no other passive income creates a suspended loss, not a current saving. The loss is not wasted; Publication 925 explains that suspended losses are carried forward and are generally allowed in full when the entire interest in the activity is disposed of in a fully taxable transaction, and they offset passive income in the meantime. But the cash benefit arrives later, and a projection that shows it arriving this year is wrong for that owner.

Why the rate matters

A deduction is worth the tax it removes. The same deduction is worth more to an owner in a high bracket than to one in a low bracket, and it can be worth nothing this year to an owner whose taxable income is already zero. If accelerated depreciation pushes an owner into a net operating loss, the loss carries forward, but for most taxpayers post-2020 losses are limited to 80 percent of taxable income in the carryforward year. Deductions that fall below the point where they save tax at your rate are deferred value, not current value.

Why the later years matter

Depreciation moved forward is depreciation removed from later years. Total depreciation over the life of the property does not increase. Then, at sale, gain attributable to depreciation on the reclassified 5-, 7- and 15-year property is recaptured as ordinary income, while depreciation on the building is unrecaptured section 1250 gain taxed at up to 25 percent. Basis is reduced by depreciation allowed or allowable in any case. The honest statement of a study's benefit is: tax deferred from now until sale, at a cost of some tax being recharacterized at ordinary rates then, less the fee for the study, with the value of the deferral depending on how long you hold and what you do with the money.

How to read a projection

A practitioner's projection should let you find each of these. If it does not, ask.

  • The reclassified basis by class, and the land split it rests on.
  • The first-year deduction under the bonus depreciation rules that apply to your acquisition date, and the deductions in each later year, compared with the no-study schedule.
  • Your marginal rate assumption, federal and state, and where it came from.
  • The passive activity treatment: whether the projection assumes you can use the loss this year, and on what basis. This is the line most projections leave out.
  • The recapture at an assumed sale date, and the net present value or at least the simple sum of tax deferred less tax recharacterized less the fee.
  • State conformity, or a statement that the projection is federal only.

A projection that reports a single "savings" figure with none of the above is a sales document. A practitioner who prices the study as a share of that figure is pricing off a number they do not control; practitioners who practice before the IRS are also subject to Circular 230's restrictions on contingent fees for most return-preparation work, which your adviser can explain.

Common misunderstandings

  • "The study will get me a refund." A refund arises when tax paid exceeds tax owed. A deduction can reduce tax owed, which may increase a refund if tax was withheld or paid in estimates; it cannot create money that was not paid in.
  • "I can use the whole loss this year." Only if the passive activity rules allow it: the special allowance, real estate professional status, or enough passive income.
  • "The savings are permanent." The deferral ends at sale, when recapture applies. The value is in the timing and in what you did with the deferred tax.
  • "A bigger reclassification is always better." A larger deduction you cannot use is a larger suspended loss and a larger future recapture; the study's accuracy matters more than its size.
  • "My state will match." Many states do not follow federal bonus depreciation.

What to do with this

Before commissioning a study, ask your tax adviser three questions: Can I use accelerated deductions this year under the passive activity rules, and how much? What is my marginal rate now and likely at sale? How long do I expect to hold? With those answers, a practitioner's projection can be read for what it is. Without them, no projection can tell you whether a study is worth its fee.

What people ask on Reddit and other forums

The searches that lead people to these threads are usually phrased "does cost segregation give a refund", "passive activity loss rental", "suspended passive loss".

The "cost segregation reddit" threads on r/realestateinvesting are where many owners first learn the difference between a deduction and a refund. From the sources below:

"I make $200k at my W-2. The provider says I'll save $40k. True?" Only if you can use the loss. Rental losses are generally passive; above the special-allowance range and without real estate professional status, the loss is suspended and carried forward. The projection is wrong for you if it assumes otherwise.

"So the deduction is wasted?" Not wasted: suspended losses offset passive income in later years and are generally allowed in full when you dispose of the entire interest in a fully taxable transaction. The cash benefit arrives later.

"Is the saving permanent?" No. Total depreciation is the same; the study moves it earlier, and recapture applies at sale.

"What should a projection show me?" The reclassified basis, year-by-year deductions versus no study, your rate assumption, the passive activity treatment, the recapture at an assumed sale, and state treatment.

Questions people also ask

Does cost segregation give me money back?

No. It produces deductions that reduce taxable income. Any refund still depends on tax you have already paid in.

Can I use a cost segregation loss against my salary?

Generally only through the special allowance of up to $25,000 for active participants, phased out at higher income, or if you qualify as a real estate professional who materially participates. Otherwise the loss is suspended.

What happens to a suspended loss?

It carries forward, offsets passive income in later years, and is generally allowed in full when you dispose of your entire interest in the activity in a fully taxable transaction.

Is a deduction worth the same to everyone?

No. It is worth your marginal rate multiplied by the amount you can use. Owners in higher brackets with usable losses benefit more.

If the study only defers tax, why do it?

Deferral has value when the deferred tax is put to use and the holding period is long enough for that value to exceed the study's cost and the effect of recapture. Whether that is true for you is the question your adviser answers.

Sources