How a 1031 Exchange Defers Capital Gains on Investment Property

Last updated July 2, 2026

A 1031 exchange allows real estate investors to defer capital gains tax when selling an investment property by reinvesting the proceeds into a like-kind replacement property within a defined timeframe. The deferred tax is not forgiven — it follows the investor into the replacement property and becomes due when the replacement property is eventually sold without another 1031 exchange. For an investor selling a property with $300,000 in realized gain, federal capital gains tax at 20 percent plus the 3.8 percent net investment income tax represents a potential $71,400 tax bill. Completing a 1031 exchange defers that amount, allowing the full $300,000 to be reinvested rather than $228,600 after tax.

The mechanics require strict adherence to IRS timelines. The investor must identify replacement property within 45 days of closing the relinquished property and complete the acquisition within 180 days. A qualified intermediary holds the proceeds during the exchange — the investor cannot touch the funds without disqualifying the exchange. The replacement property must be equal or greater in value and equity to the relinquished property; a downward exchange triggers partial gain recognition on the difference. Real property in the U.S. exchanges with real property in the U.S.; the like-kind requirement is broadly interpreted for real estate and does not require the same property type.

The calculation shows the tax deferral benefit of a 1031 exchange by multiplying your realized gain by your combined federal and state capital gains rate. That deferred amount, compounded at your expected return rate over the holding period of the replacement property, quantifies the true economic value of the exchange. For investors with large embedded gains who intend to hold investment property indefinitely, repeated 1031 exchanges followed by a step-up in basis at death can potentially eliminate the deferred tax entirely.