Cost Segregation: Accelerating Depreciation

I keep seeing investors focus on the size of a depreciation deduction and skip the more important question: what does it cost them later? Cost segregation can turn a long, slow stream of deductions into a large early one. That can be useful. It is not free money.

Cost segregation front-loads depreciation on a property, converting years of gradual deductions into more immediate ones. The point is to weigh that earlier cash-tax benefit against the recapture that can come at sale.

First-order thinking says, “Take the biggest deduction now.” Second-order thinking asks whether the owner can use the deduction, what the study costs, how long the property will be held, and whether a later sale or 1031 exchange changes the result. This is general information, not tax advice.

Key Takeaways

• Cost segregation reclassifies qualifying parts of a building into 5, 7, or 15 year depreciation lives instead of 27.5 or 39 years.
• An engineering-based study identifies those components and shifts deductions toward the early years of ownership.
• It can work strongly with bonus depreciation, but the rules changed under the 2025 tax law, so current treatment must be confirmed.
• The trade-off is greater depreciation recapture at sale. A 1031 exchange can defer that recapture.

What Cost Segregation Is

Residential rental property is ordinarily depreciated over 27.5 years; commercial property over 39. A building, however, is not one uniform asset. It contains carpeting and fixtures, specialized electrical and plumbing, cabinetry, and land improvements such as landscaping and parking. Those pieces can have shorter tax lives.

Cost segregation identifies and reclassifies qualifying components into the shorter classes the tax code permits, generally 5, 7, or 15 years. The structural building remains on the long schedule. The value of the exercise is that a meaningful share of deductions may arrive earlier.

How a Cost-Segregation Study Works

This allocation is not a rough estimate. A cost-segregation study is usually performed by specialists combining engineering and tax expertise. They review construction documents and costs, often inspect the site, assign costs to the proper asset classes and depreciation lives, and produce the report that supports the claimed treatment if the IRS asks.

A study costs money, so a property has to be large enough for the projected tax benefit to exceed that cost. It often has more relevance for a recently acquired, constructed, or renovated property. A property purchased in an earlier year can also be addressed with a catch-up adjustment rather than amended old returns.

The Bonus-Depreciation Interaction

Cost segregation identifies the shorter-life assets. Bonus depreciation can then permit a large immediate deduction for qualifying assets placed in service. The two concepts fit together, but neither replaces a current-law check.

Bonus-depreciation treatment has changed more than once and was addressed again by the 2025 tax law, which expanded the immediate write-off. The available percentage depends on the rules in effect and the date the property was placed in service. Confirm the exact result with a CPA before using a specific figure in a projection.

Who Benefits Most

The strategy tends to matter most to an investor who can use substantial near-term deductions, owns a sizable property, and has recently acquired, built, or substantially renovated it. It is less compelling for someone with little taxable income to shelter, a small asset, or an expectation of selling soon without an exchange.

The issue is not whether accelerated depreciation is attractive in isolation. It is whether the investor can use it and whether the present value of the earlier deduction exceeds the study fee and the later tax effect. Model the facts before commissioning the study.

The Recapture Trade-Off

Front-loading depreciation changes the sale calculation. It increases the depreciation that may be recaptured when the property is sold. Recapture can be taxed at up to 25%, which can be higher than the long-term capital-gains rate.

In practical terms, the owner has pulled deductions forward, often at an ordinary rate, and may pay a recapture rate later. The benefit is therefore partly a time-value-of-money and rate-arbitrage decision. A qualifying 1031 exchange defers the recapture as well as the capital gain. Holding property until death can eliminate the deferred tax through a stepped-up basis. That is why cost segregation can fit a long-term hold-and-exchange approach: deductions are used now, while the eventual recapture is deferred.

Cost Segregation and DSTs

A Delaware Statutory Trust is a grantor trust. Each investor is treated as owning a direct, undivided interest in the underlying real estate, rather than a partnership interest. That is what enables a DST interest to qualify as 1031 replacement property. It also means depreciation, including accelerated depreciation, can flow through on the investor’s grantor letter, much as it would with direct building ownership.

The remaining question is who orders the study.

Some DSTs Come With a Study Already Done

Some sponsors commission a trust-level cost-segregation study before the offering closes. The pro-rata benefit then passes through to each investor. These offerings are sometimes described as bonus-depreciation DSTs.

If a study is included, the investor’s share of accelerated depreciation appears on the annual grantor letter and flows to Schedule E. Anyone for whom first-year deductions matter should ask the sponsor whether a study has been completed and request the depreciation schedule before investing. It can materially affect the year-one tax picture.

If a DST Does Not Include One, You Can Order Your Own

Not every DST has a sponsor-level study. Because the investor is treated as a direct owner of the real estate, the investor can commission a cost-segregation study for a fractional interest. In practice, the investor or CPA engages a cost-segregation firm and obtains purchase-price, cost-allocation, and construction information from the sponsor or trustee. The firm allocates the investor’s share of basis among the shorter-life classes. The investor then claims the resulting depreciation on the personal return.

Sponsors increasingly expect requests for the underlying records. Even so, the study, its cost, and its filing remain the investor’s responsibility.

Getting the basis right is especially important. When a DST interest is acquired through a 1031 exchange, the basis is split. The carryover basis from the relinquished property continues on its existing depreciation schedule and generally cannot be re-accelerated or bonused. Excess basis—additional cash invested beyond deferred gain—is newly placed in service and may qualify for cost segregation and 100% bonus depreciation, made permanent for property placed in service after January 19, 2025. A direct cash investor who did not use a 1031 exchange has fresh, full basis, so the full interest is available for analysis. Misallocating carryover and excess basis is a common failure point and firmly a CPA matter.

There are two other cautions. DST investors are generally passive. Accelerated depreciation produces passive losses that offset passive income, including DST distributions and other passive income; excess loss is suspended until the investor disposes of the interest. And accelerated deductions still become recapture later. A future DST 1031 exchange or 721 exchange can defer that result as well. The possible first-year benefit can be estimated with the cost segregation calculator.

Putting It Together

Cost segregation is most persuasive when an owner has meaningful income to shelter, a sizable recently acquired or built property, and a plan to hold it. It can be stronger still when future 1031 exchanges are part of the plan. It is less persuasive for a small asset, little income to offset, or a near-term taxable sale.

The analysis is a comparison: present value of accelerated deductions, study cost, future recapture, and the owner’s actual holding plan. A qualified CPA and a reputable cost-segregation firm can model those facts. This is general information, not tax advice.

Frequently Asked Questions

What is cost segregation?

It is a tax strategy that reclassifies portions of a building into 5, 7, or 15 year depreciation lives instead of 27.5 or 39, pushing more depreciation deduction into the early ownership years.

How does a cost-segregation study work?

Specialists review property costs and construction documents, often conduct a site inspection, allocate cost among asset classes with different lives, and produce a report that supports the accelerated deductions.

Does cost segregation work with bonus depreciation?

Yes. Cost segregation identifies the shorter-life assets, and bonus depreciation can permit a large immediate deduction. The bonus percentage changed under the 2025 tax law, so verify current rules.

What is the downside of cost segregation?

It increases depreciation recapture when the property is sold, potentially taxed at up to 25%. The owner has pulled deductions forward and may pay recapture later, although a 1031 exchange can defer it.

Who should consider cost segregation?

It may suit an investor with meaningful income to offset, a sizable recently acquired, built, or renovated property, and a plan to hold. A 1031 exchange can defer later recapture, but the study should be modeled first.

Can I get a cost-segregation study on a DST investment?

Yes. A DST is a grantor trust, so the investor is treated as a direct real-estate owner. A sponsor may include a study, or the investor may commission one for a fractional interest using sponsor-provided property data. For an interest acquired in a 1031 exchange, only excess basis is generally eligible for fresh acceleration and bonus depreciation; carryover basis generally is not.

Glossary

• Cost Segregation: Reclassifying building components into shorter depreciation lives to accelerate deductions.
• Cost-Segregation Study: An engineering-and-tax analysis that allocates a property’s cost among asset classes and depreciation lives.
• Bonus Depreciation: An additional first-year deduction for qualifying shorter-life property; the rules changed under the 2025 tax law.
• Depreciation Recapture: Tax due on depreciation claimed when a property is sold, potentially up to 25% and increased by cost segregation.
• Excess Basis: In a 1031 exchange, basis above the carryover amount—usually additional cash invested—treated as newly placed in service and eligible for cost segregation and bonus depreciation.
• Grantor Letter: The DST substitute-1099 statement reporting an investor’s share of income, expenses, and depreciation.

Sources & References

Internal Revenue Code, 26 U.S.C. §168 — the MACRS recovery periods (including 5-, 7-, and 15-year classes) and, at §168(k), bonus depreciation. Internal Revenue Code, 26 U.S.C. §1245 — recapture as ordinary income on the personal-property components reclassified in a study. Internal Revenue Code, 26 U.S.C. §1250 — depreciation recapture on real property and "unrecaptured Section 1250 gain" taxed at up to 25%. Internal Revenue Service, Cost Segregation Audit Techniques Guide — the IRS guidance on how cost-segregation studies are conducted and reviewed.

• 26 U.S.C. §168
• 26 U.S.C. §1245
• 26 U.S.C. §1250
• IRS Cost Segregation Audit Techniques Guide

Disclosures

This memo is published by Baker 1031 for general informational and educational purposes only. It is not investment, legal, or tax advice, and is not an offer to sell or a solicitation to buy any security. Rules, rates, and thresholds are complex, depend on your circumstances, and change over time; consult your own CPA and attorney before acting.

Every figure and example here is general and illustrative, not a projection or a representation about any specific transaction. Securities offered through Aurora Securities, Inc., member FINRA / SIPC; Baker 1031 Investments is independent of Aurora Securities, Inc. Private placements referenced are sold only to verified accredited investors and involve substantial risk including loss of principal. Securities offered through Aurora Securities, Inc. (ASI), CRD #46147, SEC #8-51322, member FINRA/SIPC. Gerald F. “Jerry” Baker, III is a registered representative of ASI (FINRA CRD #7537416). Baker 1031 Investments, LLC is independent of ASI and is not a registered broker-dealer or investment adviser.

For capital I am assessing now, I would rather make the deduction decision from a full sale-and-hold model than chase the largest first-year write-off. What facts would make the recapture trade-off worth taking in your view?