The 45-day and 180-day deadlines, the boot trap, depreciation recapture deferral, and a real example showing $187,000 in taxes deferred
When you sell a rental property, the IRS expects a check. If you bought a duplex for $200,000 and sell it years later for $450,000, you are looking at capital gains tax on the appreciation plus depreciation recapture tax on every dollar of depreciation you ever claimed. For a property in that range, the total tax bill can easily reach $80,000 to $120,000 or more -- money that leaves your portfolio and never comes back. Section 1031 of the Internal Revenue Code is the provision that lets you skip that check entirely, as long as you follow the rules precisely.
The 1031 like-kind exchange has survived every major tax legislation in recent memory, including the One Big Beautiful Bill Act (OBBBA) signed in 2025. Congress did not touch Section 1031. Real property exchanges remain fully available with no dollar cap and no phase-out -- a meaningful relief for investors who had watched earlier proposals threaten to cap or eliminate the provision. As of July 2026, you can defer 100% of your capital gains and depreciation recapture when you sell one investment property and reinvest the proceeds into another.
The phrase "like-kind" is far broader than most investors expect. Under IRC Section 1031 as modified by the Tax Cuts and Jobs Act, any U.S. real property held for investment or business use can be exchanged for any other U.S. real property held for investment or business use. A residential rental property can be exchanged for a commercial building. A vacant land parcel can become a short-term rental. A single-family home in Pittsburgh can be exchanged for a strip mall in Florida. The IRS does not require that the properties be similar in type or size -- only that both are real property located in the United States and held for the right purpose.
The key disqualifiers are properties held primarily for sale (dealer property), your primary residence, and foreign real property. If you have been renting out your primary home and want to exchange it, the IRS looks at intent and holding history -- properties must have been held for investment or productive use in a trade or business, not for personal use.
The most dangerous part of a 1031 exchange is the timing. Unlike other tax strategies where missed deadlines result in a penalty, a missed 1031 deadline means you owe the full tax as if no exchange ever happened. There are two hard deadlines:
45 days to identify your replacement property. From the date you close on the sale of your relinquished property, you have exactly 45 calendar days to formally identify your replacement property in writing to your Qualified Intermediary. No extensions, no exceptions. If you miss day 45 by a single day -- due to illness, a holiday, or a deal falling through -- your exchange is invalid and the full gain is taxable. You can identify up to three properties under the "three-property rule," or more properties under the "200% rule" if their combined value does not exceed 200% of your relinquished property's value.
180 days to close on the replacement property. From the same closing date, you have 180 calendar days to actually close on your replacement property. This deadline runs concurrently with the 45-day identification window -- you do not get 45 days plus 180 days, you get 180 days total. If your tax return is due before the 180-day period expires (which happens when you sell late in the calendar year), you must file for an extension to preserve the full 180 days. Many investors discover this nuance too late.
You cannot touch the money. This is the rule that trips up more investors than any other aspect of the 1031 exchange. When you sell your relinquished property, the proceeds must flow directly to a Qualified Intermediary -- a third-party company or professional that holds the funds during the exchange period. If you receive the proceeds yourself, even for a moment, the exchange is disqualified and the entire gain becomes taxable in that year.
A Qualified Intermediary (QI) is not your attorney, your accountant, your real estate agent, or any family member or business associate who has had a financial relationship with you in the past two years. The IRS takes a strict view of who qualifies. You must engage a legitimate QI before your relinquished property closes -- you cannot engage one after the fact. The QI prepares the exchange agreement, holds the funds in a segregated account, and distributes them to the closing agent when you close on your replacement property.
Even if you complete a 1031 exchange, you may end up with a taxable event if you receive "boot" -- any non-like-kind property or cash received as part of the exchange. The most common forms of boot are cash left over after the purchase (you bought a cheaper property and kept some proceeds) and mortgage relief (your relinquished property had a $300,000 mortgage and your replacement property only has a $200,000 mortgage -- the $100,000 difference is treated as boot).
To achieve a fully tax-deferred exchange, you must reinvest all of the net equity from the sale AND replace the debt. If your relinquished property sells for $600,000 with a $200,000 mortgage, your equity is $400,000. Your replacement property must be worth at least $600,000 and carry at least $200,000 in debt to defer everything. You can substitute cash for debt (put more money down on the replacement), but you cannot substitute debt relief for cash.
Capital gains tax on appreciation gets most of the attention, but depreciation recapture is often the larger number. Every year you own a rental property, you claim depreciation as a deduction. When you sell, the IRS recaptures that benefit by taxing it. Depreciation recapture on real property (Section 1250 unrecaptured gain) is taxed at a maximum rate of 25%, not the preferential 15% or 20% long-term capital gains rate. For investors who have combined bonus depreciation with cost segregation, the recapture amount can be substantial.
A properly executed 1031 exchange defers both the capital gains tax and the depreciation recapture. Neither tax is owed until you eventually sell the replacement property in a taxable transaction. And if you continue exchanging, you can defer indefinitely -- and potentially eliminate the tax entirely if you hold the property until death, since your heirs receive a stepped-up basis and the deferred gain disappears.
Let's make this concrete. You purchased a fourplex in 2018 for $380,000. You have claimed $78,000 in depreciation over the holding period. Today you sell for $680,000. Your adjusted basis is $302,000 ($380,000 minus $78,000 in depreciation), and your realized gain is $378,000 ($680,000 minus $302,000).
That $378,000 gain breaks into two pieces: $78,000 of unrecaptured Section 1250 gain (the depreciation you claimed), taxed at 25%, and $300,000 of long-term capital gains, taxed at 20% plus the 3.8% Net Investment Income Tax for investors above the NIIT threshold. Total estimated tax without an exchange: $19,500 on the recapture plus approximately $71,400 on the capital gain, plus $11,400 NIIT -- roughly $102,300 in federal tax. Add state taxes and the real bill is often $130,000 to $187,000 depending on your state. A 1031 exchange defers every dollar of that. You reinvest the full $680,000 into your replacement property, carry over your $302,000 adjusted basis, and keep the deferred taxes working inside your portfolio instead of writing a check to the IRS.
One complication investors encounter is that the entity that sells the relinquished property must be the same entity that buys the replacement property. If you sell under your individual name, you must buy under your individual name. If your property is held in an LLC taxed as a partnership, the LLC must complete the exchange. This makes entity structure planning critical before a sale. For investors holding real estate in partnerships with multiple partners, the rules around who can complete a 1031 exchange become more complex -- see The Partnership Tax Book for a detailed discussion of the "drop and swap" strategy and how partners can exit a partnership in a way that preserves 1031 eligibility.
The One Big Beautiful Bill Act, signed in 2025 and effective for most provisions in 2026, left Section 1031 completely intact. There were no new caps, no income phase-outs, and no restriction on the types of real property that qualify. The one new provision related to gain deferral was IRC Section 1062, which creates a separate deferral mechanism for qualified farmland -- a niche provision that does not affect the standard residential or commercial real estate 1031 exchange. For the vast majority of rental property investors, the 1031 exchange works exactly as it always has.
The one area where compliance risk has increased is IRS scrutiny. The IRS has signaled increased enforcement attention on 1031 exchange transactions, particularly around QI documentation, identification letters, and the proper handling of boot. Working with a reputable QI and having your CPA involved from the beginning of the transaction -- not just at tax time -- is more important than ever.
Ready to implement this strategy? Schedule a complimentary consultation with AE Tax Advisors at aetaxadvisors.com. We handle the full 1031 exchange strategy -- from entity structuring before the sale to cost segregation on the replacement property to maximize your deductions from day one.