1031 Exchange for Rental Property: Deadlines, Boot, and Basis

A 1031 exchange lets you sell one rental property and buy another without paying federal capital gains tax at the time of sale, as long as you reinvest the full proceeds into replacement real estate of equal or greater value, use a Qualified Intermediary to hold the money, identify the new property within 45 days, and close within 180 days. The tax is deferred, not erased: the gain rolls into the basis of the replacement property and comes due if you ever sell without doing another exchange. The rules for a 1031 exchange on rental property are unforgiving, and a single mistake can disqualify the whole transaction and trigger tax on the entire gain.¹

What Qualifies as Rental Property for a 1031 Exchange

Both the property you sell and the one you buy must be held for use in a trade or business or for investment. A property you actively lease to tenants fits. A property you flip for quick resale does not, because the statute excludes real property held primarily for sale.²

The like-kind standard for real estate is broad. An apartment building is like-kind to a single-family rental. A commercial office is like-kind to raw land. The properties don’t have to serve the same function; they just both have to be real property held for business or investment.¹

Since the Tax Cuts and Jobs Act took effect in 2018, only real property qualifies. Personal property such as appliances, furniture, vehicles, and equipment no longer counts. If the sale of your rental includes personal property, that portion of the proceeds is taxed separately and cannot be deferred.²

Your primary residence doesn’t qualify. Neither does a vacation home you use mainly for personal purposes. Fractional interests in real estate can work, and under Revenue Ruling 2004-86 the IRS has treated Delaware Statutory Trust interests as qualifying replacement property, which gives investors a passive option when they want out of active management.

The 45-Day and 180-Day Deadlines

Two clocks start the day you close the sale of the relinquished property. Miss either and the exchange fails. There are no extensions for poor planning.

You have 45 calendar days to give your Qualified Intermediary a written list of potential replacement properties. Three rules govern that list:

The three-property rule lets you identify up to three properties regardless of their combined value. This is the option most rental investors use.
The 200-percent rule lets you identify more than three properties as long as their combined fair market value doesn’t exceed twice the value of what you sold.
The 95-percent rule applies if you break both limits above, and it requires you to actually acquire at least 95 percent of the total value you identified. It rarely helps in practice.

You then have 180 calendar days from the sale to close on the replacement property. Those 180 days include the initial 45-day window, so once identification is done you have roughly 135 days left. One trap catches people: the deadline is actually the earlier of 180 days or the due date of your federal tax return (including extensions) for the year the sale occurred. Sell late in the year and you’ll need to file an extension to preserve the full 180 days.²

If a federally declared disaster affects your area, the IRS may postpone these deadlines. Relief is issued case by case and applies only to affected taxpayers in designated areas.³

Why You Need a Qualified Intermediary

A Qualified Intermediary is a neutral third party that holds your sale proceeds during the exchange. This role exists because you can’t touch the money yourself. If the proceeds hit your bank account even briefly, the IRS treats that as constructive receipt and the exchange fails.⁴

Not everyone can serve as your intermediary. Federal regulations bar anyone who has acted as your agent within the two years before the exchange, including your attorney, accountant, real estate agent, investment broker, and any employee. There is an exception for professionals whose only prior service to you has been facilitating other 1031 exchanges, and for routine services from banks, title companies, and escrow companies.⁵

Fees for a standard forward exchange typically run $500 to $1,500. Before hiring one, verify the intermediary carries fidelity bond coverage and holds exchange funds in segregated accounts. If an intermediary goes bankrupt while holding your money, those funds may not be protected.

How the Exchange Moves From Contract to Closing

The sequence starts when you sign a purchase and sale contract with the buyer of your rental. Before closing, you assign the rights under that contract to the Qualified Intermediary. The buyer still buys the property and you still deliver the deed, but the sale proceeds go directly from the closing agent to the intermediary, never to you.⁴

Within 45 days of that closing, you submit the written identification notice to the intermediary. Each property must be described in enough detail to be unambiguous. Street address and legal description are standard.

Once you’re under contract on a replacement property, that purchase agreement is also assigned to the intermediary. At closing, the intermediary uses the held proceeds to pay the seller. Title to the new property transfers directly to you, and the intermediary provides a full accounting of the funds received and disbursed.¹

Boot: When Part of the Gain Becomes Taxable

A fully tax-deferred exchange requires reinvesting every dollar of proceeds into replacement real estate of equal or greater value while maintaining equal or greater debt. Any shortfall creates boot, and boot is taxable.

Cash boot is the simpler version. Sell for $500,000, and if the replacement costs only $450,000, the leftover $50,000 is cash boot and gets taxed as capital gain.

Mortgage boot trips up more investors. If your old property had a $300,000 mortgage and your new property carries only $200,000, the IRS treats the $100,000 reduction in debt the same as pocketing $100,000 in cash. You can offset mortgage boot by putting more of your own cash into the replacement property, essentially making a larger down payment to close the gap. Any net reduction in your overall investment, whether through lower property value or lower debt, triggers tax on the boot amount up to the total gain realized.¹

Tax Rates If the Exchange Fails or You Cash Out

When any portion of the gain gets recognized, whether through boot, a missed deadline, or an eventual sale without another exchange, three separate rates can apply.

Long-term capital gains rates for 2026 are 0, 15, or 20 percent depending on taxable income. The 20 percent rate hits single filers above $545,500 and joint filers above $613,700.
Depreciation recapture is taxed at a maximum 25 percent rate as unrecaptured Section 1250 gain. Depreciation you claimed over the years gets recaptured first, before any remaining gain is taxed at capital gains rates.⁶
The net investment income tax adds another 3.8 percent when modified adjusted gross income exceeds $200,000 (single) or $250,000 (married filing jointly). These thresholds are not indexed for inflation.⁷

Stacked together, a high-income investor selling a long-held rental without exchanging could face a combined federal rate approaching 29 percent on the depreciation recapture portion and nearly 24 percent on the remaining gain. That math is what drives investors through the exchange process.

Basis in the Replacement Property

The basis of your replacement property is not its purchase price. Your old property’s adjusted basis carries over, reduced by any boot received and increased by any gain recognized. A shortcut: your basis in the new property equals its value minus the deferred gain.

Two consequences follow. Your depreciation deductions on the new property come from the carried-over basis, not the purchase price, which usually means lower annual write-offs than a fresh purchase would produce. And the deferred gain stays embedded in the property. If you sell later without another exchange, you owe tax on the original deferred gain plus any additional appreciation.

Before you list, calculate your fair market value and your adjusted basis (original cost, plus capital improvements, minus depreciation claimed). Pull the current balance on every mortgage and lien. Those numbers tell you how much to spend and how much debt to carry on the replacement to reach a fully deferred exchange.

Vacation Homes and Mixed-Use Rentals

Property that has seen personal use draws extra scrutiny. Revenue Procedure 2008-16 provides a safe harbor. For the property you’re selling, during each of the two 12-month periods immediately before the exchange, you must rent it to someone else at a fair rental for at least 14 days, and your personal use during each of those periods can’t exceed the greater of 14 days or 10 percent of the days the property was rented.⁸

The same test runs in reverse for the replacement property: during each of the two 12-month periods after the exchange, you have to hit the same rental and personal-use thresholds. If you plan to eventually convert the replacement into a personal residence, satisfy the safe harbor first. Failing it doesn’t automatically disqualify the exchange, but you lose the certainty of the safe harbor and end up arguing facts and circumstances if the IRS audits.⁸

Related-Party Exchanges

Section 1031 adds restrictions when you exchange property with a related party, defined broadly to include family members (siblings, spouse, ancestors, lineal descendants) and entities where you own more than 50 percent. If either party disposes of the property received within two years of the exchange, the original exchange is retroactively disqualified and the deferred gain becomes taxable as of the date of the disposition.⁹

Exceptions exist for dispositions caused by death, involuntary conversions like condemnation or casualty, and situations where the IRS is satisfied that tax avoidance wasn’t a principal purpose. Structuring a chain of transactions to sidestep the rule can itself trigger disqualification.⁹

Reverse and Improvement Exchanges

If you find the replacement property before selling the old one, a reverse exchange lets you buy first and sell second under the safe harbor in Revenue Procedure 2000-37. An Exchange Accommodation Titleholder, usually a special-purpose LLC set up by your intermediary, takes title to one of the properties and parks it. You still have 45 days to formally identify the property being relinquished, and everything must close within 180 days of the EAT taking title.¹⁰

Improvement exchanges (sometimes called build-to-suit exchanges) use the same parking structure so exchange proceeds can fund construction or renovation on the replacement before it transfers to you. All improvements must be substantially complete within the 180-day window, which pressures the timeline for any major work.¹⁰

Both structures run significantly more than a forward exchange, often $5,000 to $15,000 or more, because of the LLC formation, separate accounting, and title-holding requirements.

Reporting the Exchange

Every 1031 exchange must be reported on IRS Form 8824 for the tax year in which the exchange occurred, even when no gain is recognized. The form requires details on both properties, the dates of transfer and identification, the relationship between the parties, and the calculation of recognized gain, deferred gain, and the basis of the replacement property.¹¹

Keep records of every exchange indefinitely. The IRS can examine your basis calculation on a future sale, and you’ll need to prove the chain of exchanges and adjustments. At the state level, a handful of states either don’t conform to federal 1031 rules or impose withholding on out-of-state sellers. State withholding on real estate sales can range from zero to over 3 percent of the sale price depending on the property location and your residency.

How the Deferral Ends

Every 1031 exchange defers gain; none of them forgives it. When you sell a property without rolling into another exchange, the entire accumulated gain from every prior exchange in the chain becomes taxable. Three exchanges over 20 years with an original $200,000 gain means that $200,000, plus any new appreciation, is due when you finally cash out.

One scenario makes the deferred gain effectively disappear. Under Section 1014, when a property owner dies, their heirs receive the property with a basis stepped up to its fair market value on the date of death. All the gain deferred through years of exchanges drops off the tax ledger, and the heirs can sell soon after with little or no capital gains tax.¹² Serial exchanges throughout a lifetime, followed by an inheritance with stepped-up basis, is the endgame that turns deferral into a permanent exclusion for many long-term real estate investors.

1
Internal Revenue Service. Like-Kind Exchanges Under IRC Section 1031
2
Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment
3
Internal Revenue Service. Tax Relief in Disaster Situations
4
Internal Revenue Service. Sales Trades Exchanges
5
Internal Revenue Service. Rev. Proc. 2003-39
6
Office of the Law Revision Counsel. 26 US Code 1 – Tax Imposed
7
Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax
8
Internal Revenue Service. Rev. Proc. 2008-16
9
Office of the Law Revision Counsel. 26 US Code 1031 – Exchange of Real Property Held for Productive Use or Investment
10
Internal Revenue Service. Rev. Proc. 2000-37
11
Internal Revenue Service. Instructions for Form 8824
12
Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent