What do these real estate tax terms mean? A 1031 exchange is a qualifying exchange of investment or business real estate. Cost segregation concerns depreciation classifications. A Qualified Opportunity Fund is a specialized investment vehicle. A Delaware Statutory Trust is an ownership structure that may, in a qualifying arrangement, hold 1031 replacement property.
They describe different subjects. None makes investment risk disappear or guarantees a tax benefit.
This is educational information, not tax, legal, financial, investment or securities advice. Eligibility, tax consequences and suitability require appropriately qualified professionals.
Four terms, four distinct subjects
| Term | Plain-language meaning | Important limitation |
|---|---|---|
| 1031 exchange | An exchange of qualifying investment or business real estate that can defer recognition of eligible gain | Qualification, receipt of proceeds and legal deadlines matter; deferral is not elimination of tax. |
| Cost segregation | Classification of eligible property costs into different depreciation recovery periods | Deductions depend on the property, current law and the owner's tax circumstances. |
| Qualified Opportunity Fund (QOF) | An investment vehicle for qualifying Opportunity Zone investments | Program rules, timing, fund eligibility and investment risk are separate questions. |
| Delaware Statutory Trust (DST) | A trust structure in which investors can own beneficial interests | Not every DST qualifies for 1031 treatment; limited control, fees and illiquidity can be material. |
What is a 1031 exchange?
Section 1031 generally applies to real property held for investment or productive use in a business. It does not apply to a primary residence simply because the owner would prefer to defer tax, or to real property held primarily for sale. A qualifying exchange generally defers recognition of eligible gain; the replacement property's basis carries deferred tax history forward.
The property transferred is commonly called the relinquished property. The property received is the replacement property. In a typical delayed exchange, a qualified intermediary facilitates the exchange under an agreement. The seller's actual or constructive receipt of sale proceeds can affect qualification; an ordinary sale followed by a later purchase is not automatically an exchange.
Federal timing requirements for a typical delayed exchange include:
- Written identification of replacement property generally within 45 days after transfer of the relinquished property.
- Receipt of replacement property generally within 180 days after that transfer, or the tax-return due date for that year, including extensions, if earlier.
These periods run concurrently. They are legal tax requirements, not ordinary offer deadlines the parties can casually extend. Timing and structure need professional confirmation before the sale closes.
Cash, certain debt relief, nonqualifying property or other value received can result in recognized gain even if part of the exchange qualifies. Related-party transactions, entity ownership and personal use can also affect treatment. California's Form 3840 instructions describe continuing reporting for certain exchanges of California property for out-of-state property until the California-source deferred gain or loss is recognized.
What is cost segregation?
A cost segregation study examines property and cost records to identify components that may belong in different tax classifications and recovery periods. Eligible costs with shorter recovery periods may produce depreciation deductions earlier than a building-only schedule.
Depreciation is a tax deduction associated with qualifying property costs over the applicable recovery period. Basis is the property's tax-accounting amount, not its market value. Depreciation recapture and other sale consequences can affect tax when depreciated property is sold.
Accelerated deductions generally reduce basis more quickly. They do not change rent, occupancy, physical condition or market value. Whether deductions can be used depends on current law, placed-in-service dates and rules such as passive-activity and at-risk limitations. Study quality and property facts also matter.
A tax professional determines the applicable classifications and consequences for the owner and property.
What is a Qualified Opportunity Fund?
A Qualified Opportunity Fund invests in qualifying businesses or property associated with designated Qualified Opportunity Zones. A zone is a designated geographic area; a fund is the investment vehicle. An investor typically invests eligible gain through a fund. Buying property in a designated area alone does not establish the investor's tax treatment.
The program is in a 2026–2027 transition. Legislation enacted in 2025 made the incentive permanent in revised form, with new zone designations scheduled to take effect January 1, 2027 and recur every ten years. Rules applicable to investments through December 31, 2026 should not be assumed to describe later investments. The IRS has issued transition guidance and indicated further regulations are expected.
Eligibility, gain inclusion, basis adjustments, holding periods and state tax treatment depend on the applicable version of the law and the investment. A federal benefit does not establish California treatment.
Fund or project losses, construction delays, leverage, sponsor conflicts, fees and limited liquidity remain possible. Tax treatment is not protection against investment loss.
What is a Delaware Statutory Trust?
A Delaware Statutory Trust can hold property while investors own beneficial interests in the trust. In the specific structure described in IRS Revenue Ruling 2004-86, investors were treated as owning fractional interests in the real estate, which could qualify as 1031 replacement property when other requirements were satisfied.
That ruling is not blanket approval of every DST. Trust documents, powers and actual operation matter. Qualification for a particular offering requires the appropriate tax, legal, exchange and securities professionals.
Passive ownership means an investor generally does not manage ordinary property-level decisions. It does not mean risk-free ownership. Sponsor control, debt, fees, changing distributions and restrictions on resale can materially affect the investment.
DST interests are commonly offered as private-placement securities. A private placement memorandum describes an offering and its risks; it is not a government guarantee. The SEC warns that private placements can provide limited information, be highly illiquid and involve substantial or total loss.
What do deferral, deduction and liquidity mean?
- Deferral: recognition of an eligible tax item is postponed under applicable rules.
- Deduction: an amount allowed to reduce taxable income, subject to qualifications and limits.
- Liquidity: how readily an asset can be converted to available cash. An ownership interest may be valuable but difficult to sell.
- Suitability: whether a particular investment is appropriate for an investor's circumstances. Knowing a term does not establish suitability.
Westin can discuss the real estate involved privately and coordinate with qualified professionals. The selection of a structure, analysis of an offering and an owner's financial model belong in that individual conversation.
Professional boundary
This reference is educational, not tax, legal, financial, investment or securities advice. A qualified tax adviser should confirm basis, depreciation, eligibility and tax consequences; legal, exchange and securities questions require the appropriate professionals. A source check or editorial review is not professional approval.