How the 1031 Exchange Rules Work, From Identification to Closing

A 1031 exchange lets a taxpayer sell real property held for business or investment and buy like-kind replacement property without paying capital gains tax that year. Section 1031 of the Internal Revenue Code fixes the terms: 45 days to identify, 180 days to close, and a qualified intermediary holding the proceeds throughout.

How a 1031 exchange actually works

Section 1031 of the Internal Revenue Code allows an owner to defer the gain on the sale of real property held for productive use in a trade or business or for investment, provided the proceeds are reinvested in like-kind property. Nothing is forgiven. The gain is rolled into the basis of the new asset and stays there until a later sale, which is why practitioners call it a deferral rather than an exemption. An investor who keeps exchanging for thirty years never writes the check; the heirs may receive a stepped-up basis at death, which is the only point where the deferred gain can actually disappear.

The sequence matters more than the paperwork. Before the relinquished property closes, the seller signs an exchange agreement with a qualified intermediary. At closing, the title company wires the net proceeds to the intermediary rather than to the seller. The seller then identifies candidate replacement properties in writing within 45 days, and the accommodator uses the held funds to purchase the property the seller selects, taking assignment of the purchase contract. The taxpayer never touches the money, and the two transfers are treated as one exchange rather than a sale followed by a purchase.

That structure is what separates a valid exchange from an ordinary sale that happens to be followed by a reinvestment. Most failed exchanges are not failures of intent. They fail because a step was taken in the wrong order, usually because nobody was engaged before the first closing. Anyone selling an investment property with an exchange in mind needs the intermediary contract signed before the deed changes hands, not after.

The 45-day identification period

The identification period runs 45 calendar days from the date the relinquished property transfers. There is no extension for weekends, holidays, or a deal falling apart on day 44. The Internal Revenue Service has granted extensions only under federally declared disaster relief, and even then by published notice rather than on request.

Identification must be in writing, must unambiguously describe the property by street address or legal description, must be signed by the taxpayer, and must be delivered by midnight of the forty-fifth day to the qualified intermediary or another party to the exchange. Sending it to your own attorney or accountant does not count, because those people are usually disqualified from acting in the exchange. A verbal shortlist, an email to your broker, or an accepted offer is not an identification.

Three alternative rules govern how many properties you may name, and you only need to satisfy one of them.

In practice almost everyone uses the three-property rule, because it is the only one that leaves room to walk away from a deal. The 95 percent rule is a trap for anyone who identifies a long list hoping to keep options open: miss one closing and the whole exchange collapses. Identifications can be revoked and replaced in writing at any point before day 45, which is the pressure valve most sellers forget they have.

The 180-day exchange period, and the deadline nobody reads

The replacement property must be received within 180 days of the transfer of the relinquished property, or by the due date of the tax return for the year in which the transfer occurred, whichever comes first. That second half of the sentence is the single most expensive detail in the whole statute.

Sell in late October, November, or December and the 180 days will run past the April filing deadline. The exchange period is then cut short unless the taxpayer files an extension for that tax return. An investor who sold on 1 December and expected to close at the end of May can find the exchange period ending in mid-April instead, losing six weeks of runway for the sake of a form that takes five minutes. The clocks also run concurrently, not consecutively: the 45 days sit inside the 180, leaving 135 days to close once identification is locked.

There is no partial credit for settling late. If the deed on the replacement property records on day 181, the exchange fails entirely and the profit from the original sale becomes taxable in the year of that sale, along with any interest and penalty for underpayment.

A worked timeline

Take a warehouse held for business use that transfers on 12 March. The timeline that follows is fixed from that date and nothing about the buyer, the market, or the intermediary can move it.

• 12 March: relinquished property transfers, proceeds go to the accommodator, both clocks start.
• 26 April: last day to deliver a signed identification, listing up to three replacement properties or any number within the 200 percent limit.
• 27 April to 7 September: 135 days to complete the purchase of one of the identified properties.
• 8 September: day 181. Any exchange funds still held are returned and become taxable.

Shift that same sale to 12 November and the timeline shortens: the 180 days end on 11 May, but the return for that tax year is due on 15 April, so the exchange period stops there unless an extension is filed. Two months of buying time disappear, and the only thing that recovers them is a form filed on time. Investors who sell late in the calendar year should treat the extension as part of the process, not as a contingency.

What like-kind means for real property

Like-kind is far broader than most sellers assume. For real estate the term refers to the nature of the property rather than its grade or quality, so an apartment building can be exchanged for raw land, a strip mall for farmland, an industrial warehouse for a medical office building, and a rental condominium for a share of a shopping center. A leasehold interest with 30 years or more left to run is treated as real property for this purpose. What the property looks like, what it earns, and who occupies it are irrelevant to the like-kind test, and no definition in the regulations narrows it further.

What matters is the use on both sides. Both the relinquished and the replacement property must be held for productive use in a trade or business or for investment. A holding without a genuine business or investment purpose fails that test, and property held primarily for resale is the clearest example, which is why a builder who flips houses cannot exchange inventory: those homes are stock in trade, not investment property. The same logic excludes a lot bought and subdivided for immediate sale.

Two restrictions are absolute. Since the Tax Cuts and Jobs Act of 2017, exchanges completed after 31 December 2017 apply to real property only; machinery, vehicles, artwork, franchise rights, and other personal property no longer qualify. And under Section 1031(h), property located in the United States is not like-kind to property located outside it, so a rental in Florida cannot be exchanged for a flat in Lisbon, though two foreign properties can be exchanged for each other. Anyone comparing markets across states will find the like-kind test no obstacle at all, whether the move is from residential to commercial real estate or the reverse.

Why a personal residence never qualifies

The home you live in is excluded, and no holding period fixes that. Congress gave homeowners a different and usually better tool: Section 121 excludes up to 250,000 dollars of gain for a single filer and 500,000 dollars for a married couple filing jointly, provided the home was owned and used as a principal residence for two of the five years before the sale. That exclusion wipes the gain out rather than deferring it, so for most owner-occupiers it is the superior outcome.

Vacation homes sit in between and have their own safe harbor. Revenue Procedure 2008-16 treats a dwelling as held for investment if, for each of the two 12-month periods before the exchange, the owner rented it at fair market rent for at least 14 days and limited personal use to the greater of 14 days or 10 percent of the days it was actually rented. Meeting those conditions does not guarantee the exchange, but it stops the Internal Revenue Service from challenging the holding purpose. A second home used only by the family and never rented does not qualify, however the deed is worded.

Mixed-use property splits. A duplex where the owner lives in one unit and rents the other is treated as two assets: the rented half can go into an exchange, the occupied half falls under Section 121. The same applies to a farmhouse on land held for agricultural business, where the residence is carved out and the land is exchanged.

The qualified intermediary and the constructive receipt trap

An exchange fails the moment the taxpayer has the right to receive, pledge, borrow, or otherwise benefit from the sale proceeds. That is constructive receipt, and it does not require the money to arrive in your account: having the power to call for it is enough. Parking the funds in your lawyer's escrow account for a week between closings is exactly the mistake the doctrine was written to catch.

The regulations create a safe harbor around a qualified intermediary, also called an accommodator or exchange facilitator. The intermediary enters a written agreement with the taxpayer, acquires the relinquished property and transfers it to the buyer, then acquires the replacement property and transfers it to the taxpayer. In practice this is done by assigning the sale and purchase contracts rather than putting the intermediary on the deed. The agreement must expressly limit the taxpayer's ability to receive or direct the funds during the exchange period.

Not everyone can serve. A disqualified person is anyone who acted as the taxpayer's employee, attorney, accountant, investment banker, or real estate agent within the two years before the transfer, along with relatives and entities the taxpayer controls. Your own closing attorney is therefore usually the one professional who cannot hold the money. Choosing an intermediary is also a credit decision: the industry is not federally licensed, and investors have lost entire exchange funds to firms that failed. Ask for a fidelity bond, a written errors and omissions policy, segregated qualified escrow accounts rather than a commingled pool, and confirmation of who holds the signature authority. Contact two or three firms before the property goes under contract, not after.

Boot: where a deferred deal still produces a tax bill

Boot is anything of value received in the exchange that is not like-kind property. Gain is recognized to the extent of boot received, capped at the total realized gain. Deferral is therefore rarely all or nothing, and a partial exchange is a perfectly valid outcome as long as the taxpayer expects the bill.

Cash boot is the simple case: money left over after the replacement property is purchased, funds pulled out at closing, or a refund of unused exchange funds at day 181. Mortgage boot is the one that surprises people. If the relinquished property carried 400,000 dollars of debt and the replacement carries 250,000, the 150,000 dollar reduction is treated as value received even though no cash changed hands. Debt relief can be offset by bringing new cash to the closing table, but cash received cannot be offset by taking on additional debt.

Two rules of thumb keep an exchange fully deferred. Buy replacement property of equal or greater value than the net selling price of the old one, reinvesting all of the realized proceeds. The distinction the IRS draws is between transactional expenses and everything else. Exchange expenses such as commissions, title insurance premiums, recording fees, transfer taxes, and the accommodator's own fee can generally be paid from the proceeds without creating boot. Non-transactional expenses cannot: prorated rent, security deposits handed to the buyer, repair credits, and prepaid operating expenses on the new asset are not exchange expenses, and paying them with exchange funds produces taxable value received. It is worth noting that lenders often insist on funding their own reserves from the same wire, which is exactly how a clean transaction turns into a partial one. That is one reason the settlement statement deserves a careful read before signing, and our guide to closing costs sets out which line items belong to which side of the divide.

Depreciation recapture is deferred, not erased

Every year a rental property is held, the owner deducts depreciation against rental income: 27.5 years for residential, 39 for commercial. Those deductions reduce the adjusted basis, so they enlarge the gain on a later sale. On real property the recaptured portion, technically unrecaptured Section 1250 gain, is taxed at a federal rate of up to 25 percent rather than the long-term capital gains rates of 0, 15, or 20 percent, and high earners add the 3.8 percent net investment income tax on top.

A 1031 exchange defers recapture along with the rest of the gain, but it does not reset the depreciation schedule. The taxpayer carries the old adjusted basis into the replacement property and adds only the additional money invested. The practical consequence is that the new property generates less annual depreciation than a straight purchase at the same price would, so the yearly tax shelter shrinks even as the deferred gain grows. Investors who exchange repeatedly should model that erosion rather than assume the shelter travels with them, and it is a point worth raising with a tax professional before the second or third exchange rather than the first.

State treatment adds another layer. Most states follow the federal rule, but several, including California, operate clawback regimes that track deferred gain on in-state property and tax it when the replacement is eventually sold, even if the owner has moved away. Pennsylvania long refused to recognize Section 1031 for personal income tax purposes at all. A state with no income tax at the destination does not make the origin state's claim disappear, and the interaction with local property tax reassessment on the new asset is a separate calculation again.

The four structures, and when each is used

A simultaneous exchange settles both legs on the same day. It is the simultaneous form contemplated by the statute and is now rare, because coordinating two settlements to the hour is difficult and leaves no margin. A true simultaneous swap between two willing owners is rarer still, since it requires each party to want exactly what the other holds. Where the simultaneous form survives, it is usually because a single buyer and a single seller happened to align, and an intermediary is still engaged to keep the funds out of the taxpayer's hands.

The delayed or forward exchange is the standard structure and accounts for the overwhelming majority of transactions. Sell first, identify within 45 days, settle within 180. Everything described above applies to it. Almost every transaction an ordinary investor will ever run takes this shape.

A reverse exchange inverts the order: the replacement property is acquired before the relinquished one is sold. Because a taxpayer cannot own both at once and still exchange them, Revenue Procedure 2000-37 provides a safe harbor in which an exchange accommodation titleholder parks title to one of the properties. The 45 and 180 day limits still apply, running from the date the parking arrangement begins. Reverse exchanges are used when the right replacement appears before the seller is ready, in tight markets where waiting means losing the asset, and they cost several times more than a forward exchange because a separate entity must be formed and funded.

An improvement or build-to-suit exchange lets exchange funds pay for construction on the replacement property. The accommodation titleholder holds the property while work proceeds, and only improvements completed and in place by day 180 count toward the exchange value. Money still sitting in the construction budget on day 181 is boot. This structure suits an investor trading a fully priced asset for cheaper land plus a building, but the deadline makes anything beyond light construction unrealistic.

Fractional ownership sits alongside these. A Delaware statutory trust interest is treated under Revenue Ruling 2004-86 as direct ownership of real estate rather than a security for exchange purposes, so it can serve as replacement property. That makes it the usual answer when a seller cannot find a whole asset in time, or when the remaining balance after a purchase would otherwise become cash boot. The trade-off is a complete loss of control: the trust cannot renegotiate financing or raise new capital, and the investor cannot sell a fractional interest on demand.

Who has to be on the deed: the same taxpayer requirement

The taxpayer who sells must be the taxpayer who buys. That sounds obvious and is the requirement most often broken, because ownership on the replacement side gets rearranged for financing or estate reasons without anyone checking the exchange consequences. Selling as John Smith and buying through a newly formed corporation breaks the chain, and so does adding a spouse or a new investor to the deed on the way in.

Certain entities are transparent for federal income tax purposes and therefore cause no mismatch. A single-member limited liability company is disregarded, so its member may sell in personal name and buy through the LLC, or the reverse. A revocable living trust is likewise disregarded as to its grantor. A partnership or a multi-member LLC is not: the entity itself is the taxpayer, so the partnership must run the exchange, and individual partners cannot each take their share in a different direction. That is the whole reason co-owners restructure into a tenancy in common well ahead of a sale.

Financing is where the requirement bites in practice. The borrower on the new mortgage has to match the taxpayer on title, and a bank underwriting a first commercial loan to a newly formed entity may want personal guarantees or a different structure altogether. Line up the lender before the relinquished property closes, because a mortgage application that has to be restarted rarely fits inside 135 remaining days. Debt on the replacement side does not have to come from a lender at all: bringing equivalent cash to the table replaces the old debt just as well, which is the cleanest way out when financing stalls. Refinancing to pull equity back out is best left until the exchange is fully reported and some months have passed, since equity taken too early looks like proceeds reaching the taxpayer by another route.

Alternatives when an exchange does not fit

Deferral is not the only tool, and an investor who cannot meet the deadlines has several ways to soften the bill. An installment sale under Section 453 spreads the profit across the years in which payments are actually received, which can keep a seller out of the top bracket without any intermediary or clock. The trade-off is credit risk, since the seller finances the buyer.

A qualified opportunity fund accepts reinvested capital profits from any asset class within 180 days of the sale, with no like-kind requirement and no intermediary. It defers rather than eliminates the original amount, and holding the fund interest for at least ten years can exempt the appreciation earned inside it. The rules are complex and the investment is illiquid, but the structure suits a seller who wants out of direct ownership entirely.

For a primary residence, Section 121 remains the better answer, and nothing in tax law stops an owner from converting a former rental into a principal home, living in it, and combining both treatments over time, subject to the nonqualified use rules that limit the exclusion. A charitable remainder trust converts an appreciated building into an income stream with a partial deduction, and a financial adviser will usually weigh it against the retirement plan already in place. A self-directed individual retirement account can hold real estate, but assets already owned personally cannot be moved into it, and an exchange cannot end there.

Paying the tax is also a decision rather than a failure. A seller who wants to leave real estate for good, or who has capital losses to offset the profit, gains nothing from a deferral that constrains the next purchase and hands the IRS a larger claim on a future sale.

Related-party exchanges and the two-year rule

Section 1031(f) allows an exchange between related parties, but both must hold their new property for at least two years afterwards. Sell to a family member or to an entity you control, and if either side disposes of the property inside that window, the deferred gain becomes taxable retroactively for both. Related parties include siblings, spouses, ancestors, descendants, and corporations or partnerships in which the taxpayer owns more than half.

The rule exists to block basis shifting: two related owners swapping a lightly depreciated building for a heavily depreciated one, then selling the second with little profit. Exchanges where the taxpayer buys from a related party through an intermediary attract particular scrutiny, and the Internal Revenue Service has successfully challenged several such arrangements. Death, involuntary conversion, and transactions where tax avoidance is demonstrably not a principal purpose are the recognized exceptions.

Reporting the exchange to the IRS

Form 8824, the IRC Section 1031 reporting form, is filed with the tax return for the year in which the relinquished property was transferred, even where the replacement closes in the following calendar year. It records the description of both properties, the dates of transfer and identification, the value of any boot, the realized gain, the recognized gain, and the basis carried into the replacement property. That basis figure is the one to keep: it drives depreciation for the life of the new asset and the tax calculation on the eventual sale, sometimes decades later.

An exchange that straddles two tax years and fails to complete is reported differently. If the replacement is never acquired, the taxpayer generally reports the sale in the year of the original transfer; where funds are returned in the following year, instalment sale treatment under Section 453 can shift the gain forward by one year. That fallback is worth knowing before an exchange collapses rather than after.

Keep the exchange agreement, the written identification with its delivery proof, both settlement statements, and the intermediary's accounting of every dollar held. The burden of showing the exchange met the requirements sits with the taxpayer, and a dated identification letter is the document that most often decides an audit.

What a 1031 exchange costs, and when it is not worth it

Intermediary fees for a straightforward forward exchange typically run from around 800 to 1,500 dollars, plus a small charge for each additional property. Reverse and improvement exchanges cost several thousand more because an accommodation titleholder entity must be created, funded, and dissolved. Legal and accounting time is extra, and lenders often add cost when the borrower on the new loan must match the taxpayer on the old title.

Set against a deferred bill that routinely reaches six figures, those fees are trivial. The real cost of an exchange is discipline. A 45-day clock in a market with little inventory pushes buyers into properties they would not otherwise choose, and overpaying by five percent to save a deferral is a poor trade. Where the gain is small, where the seller wants out of real estate altogether, or where the replacement market is visibly overheated, paying the tax and keeping the money is often the better business decision. Sellers weighing that choice will find the pricing and timing questions covered in our home selling tips.

Common questions on the 1031 exchange rules

Can I do a 1031 exchange on a property I rent out on Airbnb?

Yes, if it is genuinely held for investment. Short-term rental income does not disqualify a property, but heavy personal use does. The Revenue Procedure 2008-16 safe harbor is the benchmark: rent it at market rates for at least 14 days a year and keep your own use under 14 days or 10 percent of rented days.

What happens if I miss the 45-day deadline?

The exchange fails and the accommodator returns the funds. The gain from the sale is taxable in the year the relinquished property transferred. There is no cure and no extension outside a federally declared disaster, which is why most sellers identify a backup property they would genuinely accept.

Do I have to buy something more expensive?

Not necessarily, but buying cheaper creates boot and a partial tax bill. To defer the whole gain the replacement must be of equal or greater value, all net proceeds must be reinvested, and any debt paid off must be replaced with new debt or fresh cash.

Can I take some cash out of the deal?

You can, and it is taxed. Cash received is boot and produces recognized gain up to the amount of the realized gain. Taking cash out does not invalidate the rest of the exchange; it simply makes it partial. Refinancing the replacement property after the exchange is complete is the usual alternative, though doing it immediately before or after invites scrutiny.

How many times can I use a 1031 exchange?

There is no limit in the tax code. Investors chain exchanges for decades, each time carrying the deferred gain into a larger asset. The figure carried forward shrinks the depreciation available on each new property, so the shelter narrows as the portfolio grows.

Can two people who own a property together go separate ways?

Only with planning. A partnership interest is not real property and cannot be exchanged, so co-owners who want different outcomes usually convert to a tenancy in common well before the sale, giving each an undivided interest in the property itself. Doing that on the eve of a closing is the classic drop-and-swap, and the Internal Revenue Service examines the holding period closely.

Does a 1031 exchange work for land?

Yes. Raw land held for investment is like-kind to almost any other real property, which makes it one of the most flexible assets in an exchange. Land held for immediate resale after subdivision is inventory and does not qualify.

What to do before you list

The decisions that determine whether an exchange succeeds are all made prior to the relinquished property going under contract. Engage an accommodator and get the agreement signed. Write the exchange language into the purchase and sale agreement. Line up financing for a replacement you have not yet chosen, since lenders move slower than a 45-day clock and a first commercial loan can take longer than the whole identification window. Ask your accountant whether a filing extension will be needed for a sale late in the year, and decide in advance how much boot you are prepared to accept.

Four key dates carry the whole process, and the strict guidelines around them leave no discretion: the day the deed transfers, day 45, day 180, and the filing deadline for that tax year. Everything else is negotiable. Build a shortlist of eligible replacement properties before listing rather than after, keep multiple candidates alive through the identification window, and consult a tax professional early enough that the type of exchange is chosen rather than inherited. IRS guidance on each structure is published, but the guidelines are written for advisers rather than sellers, and the advantage of engaging one early is that the structure gets decided while it can still change.

Section 1031 is a timing tool, not a loophole. Used on a building you intended to replace anyway, it keeps capital working that would otherwise go to the Internal Revenue Service, and it compounds over a holding period measured in decades. Used to justify a purchase that does not stand on its own, it is an expensive way to buy the wrong building. The rules described here are the framework; the arithmetic on any specific sale belongs with a tax adviser who has seen the settlement statement and can ensure the numbers still work after the deferral.