Can I Use the Seller's Cost Segregation Study?

Yes, as evidence—not as your depreciation schedule. The seller's study can help identify assets, construction details, and prior improvements that still exist. But in an ordinary taxable purchase, your depreciable basis starts with your acquisition cost and a supportable allocation at your purchase date. The seller's historical costs, remaining tax basis, placed-in-service dates, and deductions cannot simply be copied onto your return. Whether a limited update is enough or a fresh valuation is needed depends on the report's detail, the property's changes, and your transaction documents.

If you have the seller's study and a closing statement, AE can review whether its asset inventory is reusable, what must be valued again, and whether the resulting deduction is usable on your return.

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What transfers with the building—and what does not

A schedule showing that the seller identified appliances, removable flooring, site lighting, or paving can be a useful starting inventory. It does not prove that each item was included in your purchase, survived to your closing, has the same fair market value, or belongs in the same recovery class. Ask for the report's photographs, asset descriptions, measurements, valuation method, and underlying schedules—not just its summary percentages.

The IRS Cost Segregation Audit Techniques Guide distinguishes cost analysis of newly constructed property from a lump-sum purchase of existing property. For acquired real estate, it focuses on values at acquisition and on allocating the buyer's price among nondepreciable land, buildings, land improvements, and personal property. IRS Publication 551 likewise starts a purchaser's basis with the purchaser's cost and requires allocation when multiple assets are bought together. Those rules are why a seller's ten-year-old dollar allocation is not the buyer's answer.

A buyer-side review in five steps

Identify what you actually bought. Compare the deed, purchase agreement, inventory exhibit, settlement statement, and any separate furniture or equipment bill of sale. A fee-simple property purchase is not the same as buying an entity interest or receiving carryover-basis property.
Establish your purchase basis. Reconcile purchase price, properly capitalized acquisition costs, credits, and any separately purchased assets. Separate land before calculating building or shorter-life depreciation. See AE's closing-cost basis guide.
Check agreed allocations. If the contract allocates price among assets, have it reviewed before adopting a conflicting study. Publication 551 explains when a buyer-seller allocation based on value is generally respected; a trade-or-business asset acquisition may also implicate Section 1060 and Form 8594. Do not assume every rental purchase automatically requires Form 8594.
Reconcile the physical property. Mark each seller-study item as present, removed, replaced, seller-retained, or newly added by you. Value what you acquired as of your acquisition date using a defensible method. A seller's cost-new estimate may be a clue, not today's used-asset value.
Model the return, not just the study. Confirm your placed-in-service date, class lives, bonus-depreciation acquisition rules, state conformity, passive-loss limits, and expected holding period. Publication 946 covers depreciation and qualified used-property rules. The seller's prior bonus claim neither automatically qualifies nor disqualifies your separately acquired basis.

Worked example: the old percentage is not the new allocation

Assume a seller paid $800,000 years ago and their study allocated $160,000 of their depreciable basis to five-year assets. You now buy the rental for $1,400,000, including land and furnished items. You cannot put $160,000 on your five-year schedule merely because that figure appears in the seller's report. Nor can you automatically multiply $1,400,000 by the seller's five-year percentage: the new price includes land, the asset mix may have changed, and value may have shifted unevenly.

Suppose a buyer-specific review supports $300,000 of land, $50,000 of separately identified furniture and equipment included in the transaction, and $1,050,000 of other acquired improvements before any properly capitalized closing costs. The $1,400,000 price reconciles, but the $1,050,000 still needs an asset-level valuation and classification; it is not automatically all 27.5-year building basis. If the $50,000 of furniture is already within a cost-segregation allocation, counting it again from the bill of sale would overstate basis. These are illustrative values, not a recommended percentage or a concluded deduction.

When an update may work—and when to commission fresh work

A scoped update may be reasonable if the seller's report includes a detailed, defensible asset inventory, relevant plans and photographs, access to the site, and a clear way to test what still exists and revalue it for your purchase. A thin summary that only states “25% personal property,” an undocumented land number, or an old report prepared before major renovations is unlikely to support your new allocation without substantial work. The IRS does not require a particular vendor or a brand-new site visit in every case; what matters is supportable identification, valuation, classification, and reconciliation to the filed return. See AE's study-quality checklist and audit-risk review.

If the deal is an interest purchase, related-party transfer, gift, or exchange rather than a straightforward asset purchase, stop before applying this example. The basis and bonus rules can be materially different; our used-property bonus guide separates several of those cases. If you already filed the buyer's first return with the wrong depreciation, first determine whether the correction is an amended return or an accounting-method change, rather than reflexively filing Form 3115.

Documents to gather before filing

Signed purchase agreement and amendments, asset-allocation exhibits, bill of sale, deed, title and settlement statements, lender and seller-credit details.
Complete seller study with schedules, methods, photographs, plans, and any record of later removals or improvements—not merely the executive summary.
Your inspection and inventory, closing-date photographs, appraisal or valuation support, land assessment or other land evidence, and invoices for post-closing work.
Your placed-in-service records, entity ownership documents, draft depreciation schedule and return, projected rental income, and any prior passive-loss carryforwards.

Failure points that change the deduction

Copying the seller's tax basis: their adjusted basis and depreciation history generally belong to their return, not a new buyer's cost-basis schedule.
Using a seller-study percentage on the entire price: land and asset-level value must be addressed, and changed or missing assets must be removed.
Ignoring the agreement: a defensible contractual allocation or applicable asset-acquisition reporting may constrain an inconsistent later position.
Equating a classification with an immediate tax saving: placed-in-service timing, bonus eligibility, passive-loss rules, state treatment, and recapture on a later sale affect the actual return benefit.

The practical question is not “Can I inherit the seller's study?” but “Can the seller's evidence reduce the work required to support my acquisition-date allocation?” AE can tie the contract, old report, property inventory, new basis, and draft return together before an aggressive number becomes a filed position. Bring the documents above and ask for a buyer-specific scope and return-impact review.