A 1031 exchange defers capital gains tax on the sale of an investment property when the proceeds are reinvested in a like-kind property within strict timing rules. Defer is the operative word. The tax bill does not disappear. It rolls forward into the basis of the replacement property and comes due whenever the chain ends, whether through a final sale, a transfer at death, or a disqualifying event. Investors who treat the exchange as a permanent tax savings often end up surprised at the table closing five years later.
The two timing windows are the part most investors miss. From the day the relinquished property closes, the investor has 45 days to identify replacement properties and 180 days to close on one of them. Both clocks run concurrently. The 45-day clock is not extended for weekends, holidays, or natural disasters in most cases. Identification has to be in writing, has to name the properties specifically, and has to be delivered to a qualified intermediary or other party permitted under the rules. A verbal identification, an emailed list to your agent, or a handwritten note in your closing folder does not count. The IRS has been clear on this point in audit case law going back to 2015.
The qualified intermediary requirement is non-negotiable. The investor cannot touch the proceeds at any point between sales. The QI holds the funds, takes the identification, and wires the closing on the replacement property. A QI fee runs between $750 and $1,200 per transaction at most major exchanges in 2026. Cheaper QIs exist, but the QI is holding six- or seven-figure sums for up to six months, and counterparty risk on a discount QI has bitten investors before. The mid-2024 case where a QI in Texas defaulted with $34 million in client funds is the cautionary tale most tax attorneys point to now.
The like-kind requirement is broader than most first-time exchangers expect. Any real property held for investment or business use qualifies as like-kind to any other real property held for investment or business use within the United States. A duplex can exchange for a strip center. A vacant lot can exchange for a multifamily building. A self-storage facility can exchange for an industrial building. The narrow definitions of like-kind that applied before the 2017 tax law were limited to personal property, which no longer qualifies for 1031 treatment. Real property exchanges remain wide open.
The replacement property has to equal or exceed the value of the relinquished property to defer the full gain. Trade-down equity is taxable in the year of the exchange. An investor who sells a $1.2 million property and reinvests $900,000 owes capital gains tax on the $300,000 trade-down, plus depreciation recapture on any portion attributable to the lower basis. The rule is straightforward, but it gets ignored often because investors size up emotionally and size down financially.
Three-property identification is the most common rule, but it is not the only one. The investor can identify any number of properties as long as the combined value does not exceed 200 percent of the relinquished property value. A 95 percent rule is also available, requiring closing on at least 95 percent of the identified value. Most exchanges use the three-property rule because it is simpler. The 200 percent rule is useful for portfolio investors who want optionality. The 95 percent rule is rarely used in practice because it is unforgiving on closing failure.
Reverse exchanges are a separate structure for investors who need to close on the replacement property before selling the relinquished one. The structure is more expensive and more complex. The replacement property is parked at an exchange accommodation titleholder for up to 180 days while the relinquished property is sold. Costs run between $4,500 and $12,000 above a standard QI fee. Reverse exchanges have grown faster than forward exchanges in 2026 in tight Nashville markets where investors cannot find a replacement after listing.
Boot is the term for any non-like-kind value received in the exchange, including cash, debt relief, or personal property. Boot is taxable in the year of the exchange even if the rest of the transaction qualifies. Reducing the mortgage on the replacement property by less than the mortgage that came off the relinquished property creates debt relief boot. Most first-time exchangers do not catch this until tax filing. The fix is to either add cash to the replacement property closing or take on equal or greater debt.
Nashville investors have specific local context to consider in 2026. The Q1 capital gains realizations from 2021 vintage purchases are coming due as five-year holds mature. Davidson County saw 87 properties sell in Q1 with sale prices more than double their 2021 acquisition. A 1031 exchange on those positions defers significant tax exposure, but the tight 45-day identification window in a market with limited inventory has caused failed identifications. Investors should line up replacement property options before listing the relinquished property.
The exchange is not a financial planning trick. It is a deferral mechanism with strict rules and meaningful costs. Used correctly across multiple transactions over decades, it compounds investor equity in real terms. Used carelessly, it produces a failed exchange and a tax bill that arrives faster than the closing wire. Talk to a CPA who has filed Form 8824 more than ten times before signing anything.