What is a Section 1031 Exchange?
A Section 1031 exchange (named after Section 1031 of the Internal Revenue Code) allows real estate investors to defer capital gains taxes when selling an investment property by reinvesting the proceeds into a like-kind property. Instead of paying taxes on the gain from the sale, you roll that gain into the replacement property and defer the tax until you eventually sell without exchanging. If you continue exchanging throughout your investing career and pass the properties to heirs, the deferred gain may be eliminated entirely through the stepped-up basis at death.
The 1031 exchange is one of the most powerful tax tools available to real estate investors. On a property sale with $200,000 in capital gains, the combined federal and state tax could be $40,000-$60,000 or more. A 1031 exchange defers that entire amount, keeping the capital working in real estate rather than going to taxes.
Requirements
Like-kind property: Both the relinquished (sold) and replacement (purchased) properties must be held for investment or business use. Primary residences and fix-and-flip properties (held as inventory) don't qualify. "Like-kind" is broadly defined for real estate — any real property qualifies. You can exchange an apartment building for raw land, a single-family rental for a commercial building, or a strip mall for a portfolio of houses.
Qualified intermediary (QI): You must use a qualified intermediary to hold the sale proceeds. You cannot touch the money. If the proceeds flow through your bank account at any point, the exchange is disqualified. The QI holds the funds in escrow between the sale of the relinquished property and the purchase of the replacement property.
Timeline: Two critical deadlines, both starting from the date the relinquished property closes:
45-day identification period: You must identify potential replacement properties in writing to the QI within 45 calendar days. You can identify up to 3 properties regardless of value, or more than 3 if their combined value doesn't exceed 200% of the relinquished property's sale price.
180-day exchange period: You must close on the replacement property within 180 calendar days. These deadlines are absolute — no extensions are granted for any reason, including weekends, holidays, or natural disasters.
Equal or greater value
To defer all taxes, the replacement property must be of equal or greater value than the relinquished property, and all proceeds must be reinvested. If you sell for $500,000 and buy a replacement for $400,000, you'll owe taxes on the $100,000 difference (called boot). Similarly, if you take any cash out of the exchange, that cash is taxable boot.
Common 1031 strategies
Trade up: Sell a smaller property and buy a larger one, using 1031 proceeds as part of the down payment. This is the most common use — investors move up in property size and value over their career while deferring taxes at each step.
Diversify: Sell one large property and buy multiple smaller ones (or vice versa). You can exchange into multiple replacement properties as long as you meet the identification and timeline rules.
Geographic relocation: Sell in one market and buy in another. An investor retiring from active management in an expensive market might exchange into NNN (triple-net) leased properties in a different state for passive income.