A 1031 exchange, named for of the Internal Revenue Code, lets real estate investors defer federal capital gains tax when they sell an investment property, as long as the proceeds are reinvested into qualifying replacement property. Done correctly, the tax that would otherwise be owed is deferred until a future taxable sale.

What counts as "like-kind"?

The phrase "like-kind" is broader than most investors expect. The IRS does not require you to swap one apartment building for another. Almost any U.S. real property held for investment or business use qualifies as like-kind to any other U.S. investment real property. Raw land for an industrial warehouse. A single-family rental for a strip center. A farm for a self-storage facility.

Important boundaries: the exchange must involve real property held for investment or productive use in a trade or business. Your primary residence does not qualify. Foreign real property does not exchange like-kind with domestic property.

The qualified intermediary

You cannot touch the sale proceeds. The moment the sale closes, the funds must flow directly to a (QI), a neutral third party whose job is to hold the exchange proceeds and transfer them to acquire the replacement property. If cash is deposited into your own account at any point, the exchange is disqualified and the gain becomes taxable.

Choose a QI carefully. There is no federal licensing regime for QIs. Use a company with institutional-grade bonding, a separate custodial account (not commingled with other client funds), and a track record. QI insolvency has cost investors real money in past cycles.

The two critical deadlines

The exchange clock starts the moment your relinquished property closes escrow.

. You have 45 calendar days to formally identify, in writing, the replacement properties you intend to acquire. There are three identification rules:

  • Three-property rule: Identify up to three properties of any value.
  • 200% rule: Identify any number of properties whose combined fair market value does not exceed 200% of the relinquished property's sale price.
  • 95% rule: Identify any number of properties, but only if you ultimately acquire at least 95% of their aggregate identified value.

Most investors use the three-property rule. The deadline is absolute. The IRS does not grant extensions for illness, natural disaster, or closing delays.

. You must close on your replacement property within 180 calendar days of the relinquished-property closing, or the due date of your tax return for the year of sale, whichever comes first. The 180-day window runs concurrently with the 45-day window; they do not stack.

FIGURE 1 · The 1031 Clock
0DAYRelinquishedproperty closes45DAYSIdentificationdeadline180DAYSReplacementclosesIDENTIFICATION WINDOWEXCHANGE WINDOW

Source · Treas. Reg. § 1.1031(k)-1

Boot

is any non-like-kind value you receive in the exchange: cash, debt relief in excess of new debt, or personal property. Boot is taxable to the extent of gain. Common boot situations:

  • You sell for $1 million, the replacement property costs $900,000. The $100,000 difference is cash boot.
  • Your relinquished property carried a $500,000 mortgage; the replacement carries only $300,000. The $200,000 of "mortgage boot" (debt relief) may be taxable unless offset by additional cash invested.

To avoid boot, reinvest all net proceeds and acquire replacement property with equal or greater debt, or pay down the debt gap with additional cash.

Common disqualifications

  1. Missing the 45-day deadline. No extensions. The exchange fails entirely.
  2. Receiving proceeds. Any funds that pass through your hands, even briefly, disqualify the exchange.
  3. Non-qualifying property. Stocks, bonds, partnership interests, and primary residences do not qualify.
  4. Same-party transactions. Acquiring property from a related party can disqualify the exchange under anti-abuse rules in IRC §1031(f), unless specific safe harbors apply.
  5. Constructive receipt. If your QI's escrow account grants you unrestricted access to funds, the IRS may treat that as constructive receipt.

Where DSTs fit in

Delaware Statutory Trusts were specifically designed to solve the identification-window problem. A DST is pre-assembled institutional real estate available for immediate acquisition. You can identify and close a DST interest in days rather than weeks. That makes them a practical backstop when direct-ownership replacement property falls through near the deadline.

This article is for educational purposes only and does not constitute investment, tax, or legal advice. Rules and deadlines are complex. Consult a qualified tax professional and legal advisor before completing any exchange.