Cost Segregation and Depreciation Recapture: The Bill That Comes Due at the Exit

The study itself is not the problem. Not knowing what it does to the exit is.

What the study actually changed

A building bought as a single asset depreciates over 27.5 years (residential) or 39 years (nonresidential) on the straight line. A cost segregation study engineers that building into its components and reclassifies the ones that qualify (much of the electrical and plumbing tied to equipment, cabinetry and millwork, specialty flooring, signage, parking, landscaping, site work) into 5, 7 and 15-year property.

That reclassification is real and it is allowed. It pulls deductions forward, often dramatically, and when bonus depreciation is available it can put a large share of the purchase price into year one.

What it also does is quietly change the character of that depreciation. The components moved out of the building are no longer §1250 real property. They are §1245 property. And §1245 property recaptures differently.

Go deeper: cost segregation before a sale, who it fits and the catch on Big Sale Tax.

Two buckets, taxed nothing alike

The 25% figure on the §1250 side is a ceiling, not a flat rate. If your marginal ordinary rate that year is below 25%, the lower rate applies. That is a detail most calculators get wrong in the seller's favor.

The §1245 side has no ceiling at all.

The part that surprises people: §453(i)

Under IRC §453(i), depreciation recapture income is excluded from the installment method entirely. It is recognized in the year of sale, at ordinary rates, regardless of how the note is written.

You can structure a sale across twenty years. The §1245 recapture is still due in year one.

This is where a well-planned exit goes wrong. A seller structures the whole sale to spread the gain, takes little or nothing at closing, and then meets a six-figure ordinary-income bill in April with no cash set aside to pay it. The deferral worked exactly as designed on the capital gain. It did nothing at all for the recapture layer sitting underneath it.

A worked example

A commercial building sells for a $3,000,000 gain. A cost segregation study performed at acquisition produced $850,000 of depreciation, of which $250,000 sat in reclassified §1245 components and $600,000 in the building itself.

• $250,000 §1245: ordinary income, year one, no deferral available
• $600,000 §1250: capital gain at a 25% ceiling, spreads with the payments, but reported ahead of the 15/20% gain under Treas. Reg. §1.453-12
• $3,000,000 remaining gain: 0/15/20%, spreads across the term

Two consequences follow that most projections miss. First, only about 91 cents of every dollar of gain in that deal is actually structurable, because the §1245 layer is not. Second, the early years of the note are taxed noticeably harder than the late ones, because the §1250 layer is recognized first at 25% before any of the 15/20% gain is reached. The bill does not arrive evenly.

Does that make cost segregation a mistake?

Usually not. The study still converts a deduction you would have taken slowly into one you take now, and money deducted at a 37% bracket today against recapture at 25% later is a genuine arbitrage, before you even count the time value of holding the cash for a decade.

It goes wrong in three situations:

• A short hold. Accelerate deductions, sell in four years, and you get the recapture without enough time for the deferral to have earned anything.
• A bracket that goes up, not down. The arbitrage assumes you deduct high and recapture low. A seller whose sale year is their highest-income year ever can invert it.
• A structured exit nobody stress-tested. The §1245 bill lands in year one whether or not you left yourself cash at closing to pay it.

What to settle before you sign

1. Get the §1245 and §1250 split from the study, in writing, before the deal is priced. Your depreciation schedule and Form 4562 history carry it; the cost segregation report itemizes it.
2. Model the year-one bill separately from the deferred gain. They are different taxes on different clocks.
3. Carve out cash at closing sized to the §1245 layer. If a sale is structured end to end, that money has to come from somewhere, and it cannot come from the note.
4. Ask whether a 1031 exchange fits instead, and whether the §1245 components would carry over. The answer depends on what is acquired, and mismatched replacement property can trigger recapture inside an exchange that otherwise defers.

None of this argues against structuring a sale. It argues for structuring the part that can be structured, and funding the part that cannot.

Frequently asked

Does a cost segregation study increase my total tax? Not by itself. It changes the timing and the character. The risk is that character change (ordinary instead of capital) combined with a sale year in a high bracket.

Can I avoid §1245 recapture by selling on an installment note? No. §453(i) removes it from the installment method. It is recognized in the year of sale.

Is unrecaptured §1250 gain always taxed at 25%? No. 25% is a maximum. Below a 25% marginal ordinary rate, the lower rate applies.

What if I never claimed the depreciation? It is still recaptured. The rule is "allowed or allowable": the deduction you were entitled to counts whether or not you took it.

Educational only. This is general information about federal tax rules, not tax or legal advice, and it does not create a client relationship. Depreciation recapture depends on facts specific to your property and your return. Confirm the treatment with your own CPA or tax attorney before acting.

• Depreciation recapture: the full explainer: §1245 vs unrecaptured §1250, the 25% ceiling, and the land-share mistake that inflates both