What Is Not Allowed in a 1031 Exchange: Deadlines, Boot, and Boundaries

A 1031 exchange can be disqualified — or partially taxed — in more ways than most investors expect. The rules on what is not allowed in a 1031 exchange fall into a few clear buckets: property that isn’t investment real estate, deadlines that pass, sale proceeds you or your agent touch, value received that isn’t like-kind real estate, and certain deals between related parties. Any one of these can convert a deferred gain into an immediate tax bill.

Property Types That Don’t Qualify

Since the Tax Cuts and Jobs Act took effect on January 1, 2018, only real property held for productive use in a trade or business or for investment qualifies. Equipment, vehicles, artwork, collectibles, patents, and other tangible personal property no longer qualify at all.¹

Several categories are barred by the statute itself, regardless of how they are held:

Inventory or property held for sale, which includes homes built by a developer, subdivision lots, and fix-and-flip projects.
Stocks, bonds, and notes, including instruments held in a business account.
Partnership interests, though an interest in a partnership that has elected out of Subchapter K is treated as a direct interest in the partnership’s underlying assets.
Certificates of trust and beneficial interests, which are treated like securities for this purpose.

These exclusions have not moved.²

The real-versus-personal-property line matters inside every closing, not just at the edges. When a commercial building comes with furniture, appliances, or other movable assets, those items have to be separated and valued on their own. The IRS allows a narrow identification shortcut: incidental personal property worth no more than 15% of the larger real property’s value doesn’t have to be listed separately on identification paperwork. That shortcut only affects the identification step. The personal-property portion is still not like-kind and produces some taxable gain.³

Personal Residences, Vacation Homes, and Foreign Property

Your primary residence is not eligible, because it isn’t held for investment or business. Section 121 handles the tax treatment of a principal residence, allowing individuals to exclude up to $250,000 of gain, or $500,000 for married couples filing jointly. Section 121 and Section 1031 are separate programs with separate rules and do not stack the way many homeowners assume.⁴

Vacation Homes

Vacation properties fall between the two. Revenue Procedure 2008-16 created a safe harbor: a dwelling unit will be treated as investment property if all of the following hold.

You own the property for at least 24 months before the exchange (relinquished side) or 24 months after (replacement side).
In each of the two 12-month periods, you rent it at fair market value for at least 14 days.
Your personal use in each 12-month period does not exceed the greater of 14 days or 10% of the days it was rented at fair market value.

A property that misses the safe harbor is not automatically disqualified, but you have to be able to prove its investment purpose if the IRS asks. Mixed-use properties are where audits concentrate.⁵

Foreign Real Estate

U.S. real estate and foreign real estate are not like-kind to each other. You cannot sell a rental in Texas and defer the gain into a villa in Portugal, and the same block applies in the other direction. Every property in the exchange has to be on the same side of the border.²

Deadlines You Cannot Extend

Two hard deadlines run from the day you transfer the relinquished property. Missing either one ends the deferral.

The 45-day identification period gives you exactly 45 calendar days to identify potential replacement properties in writing. The identification has to be signed by you and delivered to someone involved in the exchange, such as the seller of the replacement property or your qualified intermediary. Telling your accountant, attorney, or real estate agent doesn’t count. Each property must be described clearly, by legal description, street address, or a distinguishable name.⁶

The 180-day exchange period requires you to close on the replacement property within 180 calendar days of the original transfer, weekends and holidays included. There’s a catch: if your tax return is due before day 180 and you haven’t filed an extension, the exchange period ends on the filing deadline instead. An October closing on the sale side, for example, would push the 180-day window into mid-April, so an unextended April 15 return can cut the exchange short. A tax extension is inexpensive protection against that.²

Identification Limits

Within the 45-day window, you can’t list unlimited backups. You must satisfy one of three rules:

Three-property rule. Identify up to three potential replacements, at any combined value. This is the simplest and most commonly used.
200% rule. Identify any number of properties, so long as their total fair market value doesn’t exceed 200% of what you sold.
95% rule. Identify any number of properties at any total value, but actually acquire at least 95% of the aggregate identified value. It is rarely satisfied in practice.

An identification that fits none of the three is treated as if you identified nothing, and the exchange fails. Identifying four properties above 200% of the relinquished value and then closing on only two of them blows the deal.

Touching the Money: Constructive Receipt

If you or your agent takes possession of the sale proceeds at any point, the IRS treats the entire gain as taxable. This is the most mechanical way to disqualify an exchange. Funds landing in your personal account even briefly, or being held by your attorney rather than a qualified intermediary, ends the deferral.⁶

A qualified intermediary is a third party who holds the proceeds in a separate account until they’re used to buy the replacement property. Their fee can be paid from exchange funds without triggering boot. Qualified intermediaries are largely unregulated at the federal level, and exchange funds don’t carry FDIC protection the way a bank deposit does. Insisting on a segregated, individually titled escrow account rather than a pooled one, and verifying that the intermediary carries a fidelity bond or errors-and-omissions coverage, are the practical safeguards.

Receiving Anything Other Than Like-Kind Real Estate: Boot

Value you receive in the exchange that isn’t like-kind real property is “boot,” and it produces immediate taxable gain. Several kinds show up in ordinary closings.

Cash Boot

Any sale proceeds you don’t reinvest in replacement property are boot. Sell for $500,000 and reinvest $450,000, and the $50,000 gap is taxable. Cash held back for reserves or taken as profit at closing counts.⁶

Mortgage Boot

If the debt on the replacement property is less than the debt on the property sold, the difference is boot. Trading a property carrying a $300,000 mortgage for one with a $250,000 mortgage produces $50,000 in mortgage boot. You can offset it by adding cash to the deal or taking on enough new debt to match.⁷

Non-Like-Kind Property

Personal property bundled into a real estate deal isn’t like-kind. If a tractor, boat, or furniture comes with the building, the fair market value of those items is reported as gain on Form 8824. The real estate value and everything else have to be accounted for separately.⁷

Closing Costs That Create Boot

Some closing expenses can come out of exchange funds without triggering boot: real estate commissions, title insurance, escrow fees, recording fees, and the qualified intermediary’s fee. Others create boot when paid from the proceeds. Financing charges are the big group here — loan origination fees, points, appraisal fees, mortgage insurance premiums, and lender’s title insurance. Prorated property taxes, insurance premiums, and repair costs fall into the same category. Paying those items from a separate account, not from the exchange proceeds, is the safer route.

Related-Party Exchanges

Exchanges between related parties are allowed, but the deferral comes with a two-year holding requirement. If either party disposes of the property received within two years of the exchange, the deferred gain becomes taxable in the year of that later disposal.²

“Related party” is broader than most people think. It covers brothers and sisters (including half-siblings), a spouse, ancestors, and lineal descendants. It also covers an individual and a corporation or partnership in which that individual owns more than 50% of the stock or capital interest. Trusts, their grantors, and their beneficiaries are related parties, as are an executor and the beneficiaries of the same estate.⁸

Three narrow exceptions relieve the two-year rule: the death of either party, an involuntary conversion such as a natural disaster where the exchange occurred before the threat, or a showing to the IRS that neither the exchange nor the later disposal had tax avoidance as a principal purpose. That last exception gets litigated often, and courts look at whether the net tax result of the exchange was significantly better than a direct sale would have been. When it was, they tend to infer a tax-avoidance motive regardless of stated intent.²

What the Exchange Doesn’t Erase

A 1031 exchange defers your capital gain and your accumulated depreciation. It doesn’t eliminate either. The replacement property inherits the tax basis of the relinquished property, so the depreciation you claimed on the old building carries over. Investors who chain several exchanges together build a larger and larger deferred depreciation balance.

When you finally sell without doing another exchange, that accumulated depreciation comes due. The IRS taxes this “unrecaptured Section 1250 gain” at a maximum rate of 25%, higher than the standard long-term capital gains rate that applies to the rest of the gain.⁹ Investors who have exchanged through several properties over decades sometimes face a large bill when they cash out, and the 25% depreciation-recapture rate is the piece that surprises them most.

1
Internal Revenue Service. Like-Kind Exchanges – Real Estate Tax Tips
2
Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment
3
Internal Revenue Service. Publication 544 (2025) – Sales and Other Dispositions of Assets
4
Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence
5
Internal Revenue Service. Revenue Procedure 2008-16 – Safe Harbor for Dwelling Units in Section 1031 Exchanges
6
Internal Revenue Service. Like-Kind Exchanges Under IRC Section 1031
7
Internal Revenue Service. 2025 Instructions for Form 8824 – Like-Kind Exchanges
8
Office of the Law Revision Counsel. 26 USC 267 – Losses, Expenses, and Interest With Respect to Transactions Between Related Taxpayers
9
Internal Revenue Service. Topic No. 409 – Capital Gains and Losses