1031 Exchange Tax Guide: How to Defer Capital Gains on Real Estate in 2026

July 1, 2026 · Guide · 6 min read

A 1031 exchange allows real estate investors to sell an investment property and defer capital gains taxes by reinvesting into a like-kind replacement property. For investors with appreciated properties, this deferral can preserve six-figure amounts that would otherwise be owed to the IRS — but the structure has firm deadlines, specific requirements, and tax implications that require CPA oversight to execute correctly.

The Core Mechanics

Under IRC Section 1031, no gain is recognized on the exchange of real property held for investment if the proceeds are reinvested in like-kind property. "Like-kind" is broadly defined for real estate: an apartment building can be exchanged for a commercial office, a vacant lot for a rental house, raw land for industrial property. The property must be located in the United States.

What qualifies:

• Rental property (residential or commercial)
• Investment land
• Business real estate
• Some types of leasehold interests (30+ year leases)

What doesn't qualify:

• Primary residences
• Property held primarily for resale (house flippers)
• Personal property (equipment, vehicles — eliminated from 1031 eligibility after the 2017 Tax Cuts and Jobs Act)
• Partnership interests

The Two Non-Negotiable Deadlines

This is where most exchange failures happen. The IRS does not grant extensions for missed deadlines except in federally declared disasters:

• 45-Day Identification Deadline: Within 45 calendar days of closing on the relinquished property, you must identify potential replacement properties in writing to your Qualified Intermediary. The clock starts the day of closing — not the day of contract, not the day of recording.
• 180-Day Closing Deadline: You must close on the replacement property within 180 calendar days of the sale of the relinquished property (or by the due date of your tax return including extensions, if earlier — a common surprise for tax filers).

Identification rules: You can identify up to 3 properties without restriction (the "3-property rule") or any number of properties whose combined value doesn't exceed 200% of the relinquished property's value (the "200% rule"). Most investors use the 3-property rule for simplicity.

Qualified Intermediaries: Why You Can't Touch the Money

A 1031 exchange requires a Qualified Intermediary (QI) — an independent third party who holds the proceeds from the sale and then deploys them to the replacement property purchase. You cannot receive the proceeds directly, even briefly. Direct receipt — including depositing funds in your bank account for one day — disqualifies the entire exchange. The QI is not your attorney, CPA, or anyone who has served as your agent in the last 2 years.

QI fees: $700–$1,500 for a basic exchange, higher for complex or reverse exchanges. Verify that your QI maintains segregated accounts and carries adequate fidelity bonding and E&O insurance — there have been QI failures that cost investors their deferred gains in exchange proceeds that were commingled or stolen.

Understanding Boot: When Partial Deferral Happens

Boot is anything received in the exchange that is not like-kind property. It reduces your deferral:

• Cash boot: Proceeds not reinvested in the replacement property. If you sell for $800,000 and purchase a replacement for $700,000, the $100,000 difference is cash boot — taxable in the year of exchange.
• Mortgage boot (debt relief): If the relinquished property had a $300,000 mortgage and the replacement property has a $200,000 mortgage, the $100,000 reduction in debt is treated as boot received. To avoid this, you must either take on equal or greater debt in the replacement, or contribute additional cash.

To achieve full deferral: the replacement property's purchase price must equal or exceed the sale price of the relinquished property, AND total equity (or debt) acquired must equal or exceed equity (or debt) released. Your CPA should run the boot calculation before you identify replacement properties.

Depreciation Recapture: The Tax You Can't Defer

Capital gains deferral doesn't eliminate depreciation recapture. Under IRC Section 1250, accumulated depreciation deductions taken on the relinquished property are subject to recapture tax at a maximum rate of 25% when the property is eventually sold. In a 1031 exchange, you carry the original cost basis (reduced by accumulated depreciation) into the replacement property — deferring both capital gains AND depreciation recapture. But the recapture liability follows the basis until a taxable sale occurs.

This is why the frequently cited claim that "1031 exchanges eliminate capital gains taxes" is incorrect. They defer the gain until the replacement property is sold without a subsequent exchange. The accumulated deferred gain and depreciation recapture are fully taxable on eventual sale. Estate planning strategies (stepped-up basis at death) can eliminate the deferred gain if the investor holds through death — a planning point your CPA should model explicitly. See our guide on real estate tax benefits for how depreciation and 1031 exchanges interact with overall investment strategy.

When a 1031 Exchange Makes Sense (And When It Doesn't)

Good candidates for a 1031 exchange:

• Investor with large accumulated gain ($200,000+) seeking to upgrade to a larger property
• Investor consolidating multiple properties into one or swapping high-maintenance property for a passive investment (DST — see below)
• Investor in a high-income year who wants to defer the capital gain to a lower-income retirement year
• Estate planning scenario where the investor intends to hold through death (stepped-up basis)

When a 1031 exchange may not be worth it:

• Gain is small relative to transaction and intermediary costs
• Investor needs cash from the sale for non-real-estate purposes
• No suitable replacement property is available within the 45-day identification window
• Investor is in a low tax bracket where capital gains tax is 0% or 15%
• Net investment income surtax and state taxes create a lower effective capital gains rate than assumed

Your CPA should model the actual tax cost of selling without an exchange vs deferring — including state capital gains tax, the 3.8% net investment income surtax (for higher-income investors), and depreciation recapture. Sometimes the deferred tax bill is smaller than the transaction friction of executing an exchange under time pressure.

Delaware Statutory Trusts (DSTs): The Passive Exchange Option

Investors who can't identify suitable replacement properties within 45 days increasingly use Delaware Statutory Trusts — fractional interests in institutional-quality commercial real estate that qualify as like-kind property for 1031 purposes. DSTs allow exchanges into diversified real estate portfolios without property management responsibilities. Minimums are typically $100,000–$250,000; the investor becomes a passive beneficiary of trust income. DSTs have illiquidity risks and are securities offerings requiring accredited investor status — appropriate for investors seeking passive real estate exposure after an active management exit.

Role of a CPA in a 1031 Exchange

The Qualified Intermediary handles the mechanics; your CPA handles the strategy and reporting:

• Calculating realized gain, recognized gain, and boot before the exchange closes
• Computing the replacement property basis (original cost minus accumulated depreciation, adjusted for boot)
• Filing Form 8824 (Like-Kind Exchanges) with your tax return
• Modeling long-term tax impact of deferral vs recognition
• Coordinating with estate planning around stepped-up basis

An exchange completed without CPA involvement frequently results in errors that trigger IRS scrutiny or surprise tax bills. Find a CPA with real estate investment experience at near you or browse by city — look specifically for experience with like-kind exchanges, not just general tax preparation. See also our guide on what to look for in a CPA for real estate investors and our capital gains tax guide for broader context on how 1031 deferral fits into a real estate tax strategy.