Summary. A like-kind exchange defers gain on the sale of investment real estate if the transaction is structured before the sale closes and every deadline is met. The rules are unforgiving in a specific way: the taxpayer may never have the right to receive the proceeds, the replacement must be identified within forty-five days, and the exchange must close within one hundred eighty days, with no extension for a missed identification. This guide covers what qualifies after the 2017 restriction to real property, how the qualified intermediary safe harbor works and what destroys it, the identification and timing arithmetic, how boot and debt relief create taxable income even in a completed exchange, and the reverse and improvement structures.

The most expensive sentence in this area is spoken by a seller at a closing table: "We'll figure out the 1031 afterward."

There is no afterward. Once the seller has the right to receive the proceeds — even if the money sits in escrow, even if nobody touches it — the sale is a taxable sale and no subsequent structure fixes it. The exchange must be in place before the relinquished property closes, with a qualified intermediary engaged, an exchange agreement signed, and the deed and settlement statement reflecting the assignment.

Everything else in IRC § 1031 is a matter of care and arithmetic. That one thing is a matter of timing, and it is where most failed exchanges fail.

What qualifies

Real property only, since 2018. The Tax Cuts and Jobs Act restricted § 1031 to real property. Exchanges of equipment, vehicles, aircraft, artwork, collectibles, cryptocurrency, and franchise rights no longer qualify. This was a significant change and older materials remain in circulation; disregard any source describing personal property exchanges.

Held for productive use in a trade or business or for investment, on both sides.

Excluded:

  • Property held primarily for sale — dealer property, inventory, and lots held by a developer for resale. This is the most litigated qualification question, and it turns on facts: frequency of sales, extent of improvements, marketing activity, holding period, and the taxpayer's stated purpose. A "fix and flip" does not qualify.
  • A personal residence. Note that IRC § 121 provides its own exclusion for a principal residence, and the two can be combined in sequence for a property that was both.
  • Stock in trade, securities, partnership interests, and certificates of trust or beneficial interest — § 1031(a)(2) excludes them expressly. A partnership interest is not real property, which is the root of the drop-and-swap problem discussed below.
  • Property outside the United States, when exchanged for U.S. property. Foreign real property is like-kind only to other foreign real property.

What is like-kind. For real property, the standard is extremely broad. Raw land is like-kind to an office building; a thirty-year leasehold is like-kind to a fee interest (leases with thirty years or more remaining, including options, qualify); a conservation easement, mineral rights, water rights, and a tenancy-in-common interest generally qualify. Quality and grade do not matter — only that both are real property held for a qualifying purpose.

Vacation homes. Revenue Procedure 2008-16 provides a safe harbor: the property qualifies if, for each of the two twelve-month periods before the exchange (and after, for the replacement), it was rented at fair market value for at least fourteen days and the taxpayer's personal use did not exceed the greater of fourteen days or 10% of the days rented.

The safe harbor: qualified intermediaries

The problem § 1031 has to solve is that a true simultaneous swap almost never happens; the taxpayer sells to one party and buys from another. The deferred exchange regulations, Treas. Reg. § 1.1031(k)-1-1), solve it with a set of safe harbors, of which the qualified intermediary is by far the most used.

How it works:

  1. Before the relinquished property closes, the taxpayer enters an exchange agreement with a QI.
  2. The taxpayer assigns its rights under the sale contract to the QI, and written notice of the assignment is given to the buyer.
  3. At closing, the deed passes directly from the taxpayer to the buyer (direct deeding is permitted), and the proceeds go to the QI, never to the taxpayer.
  4. The taxpayer identifies replacement property within 45 days.
  5. The QI acquires the replacement property and transfers it to the taxpayer, or more commonly assigns the purchase contract and directs the funds to the closing.

The taxpayer must not have actual or constructive receipt of the proceeds. The exchange agreement must expressly limit the taxpayer's right to receive, pledge, borrow, or otherwise obtain the benefits of the funds — that limitation is what the safe harbor requires and what makes it work.

Who may not be a QI — the "disqualified person" rules. Not the taxpayer, not an agent of the taxpayer, and not a person related to either. An agent includes anyone who has been the taxpayer's employee, attorney, accountant, investment banker, or real estate agent or broker within the two-year period before the transfer. This catches unwary taxpayers routinely: your own lawyer or CPA cannot serve as your QI.

Choosing a QI. The industry is lightly regulated at the federal level and there have been failures in which exchange funds were lost. Diligence points:

  • Segregated, qualified escrow or trust accounts in the taxpayer's name, not commingled.
  • A fidelity bond and errors-and-omissions coverage at meaningful limits.
  • Dual authorization for disbursements.
  • Financial strength and years in operation; institutional affiliation.
  • State registration or bonding where required — several states regulate exchange facilitators.
  • Written confirmation of where the funds will be held and what interest arrangement applies.

Other safe harbors exist and are used less often: a qualified escrow account or qualified trust, security or guarantee arrangements, and interest or growth factors. Direct deeding and the QI structure cover nearly all transactions.

The two deadlines

Both run from the date the relinquished property transfers. Both are in IRC § 1031(a)(3) and both are statutory.

45 days to identify. The replacement property must be identified in a written document, signed by the taxpayer, and delivered to the QI or to another person involved in the exchange who is not a disqualified person, before the end of the 45th day.

180 days to close. The replacement property must be received by the earlier of 180 days after the transfer, or the due date (including extensions) of the taxpayer's return for the year of the transfer. That second limb catches December transactions: a sale closing on 15 November leaves a 180-day period ending in mid-May, but the return due date for a calendar-year individual is 15 April — so the taxpayer must extend the return to preserve the full period. This is a routine and entirely avoidable failure.

The periods are calendar days, including weekends and holidays, and they do not extend for a weekend or holiday ending. The only relief available is a federally declared disaster, for which the IRS issues notices postponing § 1031 deadlines for affected taxpayers.

Identification rules — the taxpayer must satisfy one:

  • Three-property rule. Identify up to three properties of any value.
  • 200% rule. Identify any number, provided the aggregate fair market value does not exceed 200% of the relinquished property's value.
  • 95% rule. Identify any number of any value, provided the taxpayer actually acquires at least 95% of the aggregate identified value. A backstop that is rarely relied on deliberately.

Identification mechanics:

  • Describe each property unambiguously — legal description, street address, or a distinguishable name. For a property to be constructed, describe the underlying land and the improvements as specifically as practicable.
  • Revocations are permitted in writing before the 45th day; after it, the identification is fixed.
  • Percentage interests must be specified where less than the whole is being acquired.
  • Deliver to the QI, keep proof of delivery, and keep a copy signed and dated.

Practical advice: identify three properties, in order of preference, even when the first is under contract. Deals fail, and a taxpayer whose sole identified property falls out on day 60 has a fully taxable sale.

Boot: how a completed exchange still produces tax

Gain is recognized to the extent of boot — money or non-like-kind property received. Deferral is complete only if the taxpayer satisfies two conditions:

  1. Reinvest all of the net proceeds in replacement property; and
  2. Acquire replacement property of equal or greater value, replacing any debt relieved with either new debt or additional cash.

Cash boot. Any proceeds not reinvested. Includes cash taken at closing, funds left with the QI at the end of the exchange period, and, importantly, certain closing costs paid from exchange funds that are not exchange expenses — for example, prorated rents or a security deposit credit, or the payoff of a loan unrelated to the property.

Mortgage boot (debt relief). If the relinquished property carried a $1.2 million mortgage and the replacement carries $900,000, the taxpayer has been relieved of $300,000 of debt and has $300,000 of boot — even though no cash was received. This surprises taxpayers constantly.

The fix for mortgage boot is to contribute additional cash at the replacement closing, which offsets debt relief. The reverse is not true: cash boot received cannot be offset by taking on additional debt.

A worked example. Relinquished property sells for $2,000,000, with a $700,000 mortgage paid off, $120,000 of closing costs, leaving $1,180,000 of net proceeds to the QI. The taxpayer's adjusted basis was $600,000, so the realized gain is roughly $1,280,000.

  • Replacement at $2,000,000 with a $700,000 new mortgage and the full $1,180,000 of proceeds plus $120,000 additional cash: full deferral.
  • Replacement at $1,700,000 with a $520,000 mortgage, taking $180,000 of proceeds back: boot equals $180,000 cash plus $180,000 of debt relief, and recognized gain is $360,000 — even though this is a "successful" exchange.

Basis in the replacement property is the basis of the relinquished property, increased by gain recognized and by any additional cash invested, and decreased by boot received. The deferred gain persists in the low basis and is recognized on a later taxable sale — or eliminated entirely at death by the basis step-up under IRC § 1014, which is why "swap till you drop" is a real estate planning strategy rather than a joke.

Depreciation. The replacement property's basis is generally split: the carryover portion continues to be depreciated over the remaining recovery period of the relinquished property using the same method, and any excess basis from additional investment is depreciated as newly placed-in-service property. An election is available to treat the entire basis as new property, which is sometimes preferable.

Recapture. Deferral under § 1031 defers recapture as well, but where boot is recognized, unrecaptured § 1250 gain is taxed at the higher rate applicable to it before other capital gain, and any § 1245 recapture on personal property components — now that such property cannot itself be exchanged — is recognized currently.

Reverse and improvement exchanges

The reverse exchange. The taxpayer must close on the replacement property before the relinquished property sells — a competitive market, a rare asset, or a seller who will not wait.

The problem: the taxpayer cannot own both properties simultaneously and still have an exchange.

The solution: Revenue Procedure 2000-37 creates a safe harbor. An exchange accommodation titleholder (EAT) — typically an LLC formed by the QI — takes and holds title to the replacement property (a "parked" property) under a qualified exchange accommodation agreement (QEAA) while the taxpayer sells the relinquished property. Then the EAT transfers the parked property to complete the exchange.

Requirements and mechanics:

  • The QEAA must be in writing within five business days of the transfer to the EAT.
  • The taxpayer must identify the relinquished property within 45 days of the parking.
  • The parked property must be transferred out within 180 days of the parking.
  • The taxpayer may lend the EAT the purchase price, may guarantee the EAT's debt, may lease the property from the EAT, and may manage it — the safe harbor expressly permits arrangements that would otherwise look like ownership.
  • The EAT must be treated as the beneficial owner for tax purposes and must have some genuine economic attributes.

Alternatively, park the relinquished property — the EAT takes title to the property being sold while the taxpayer buys the replacement directly. This variant avoids transferring a mortgaged property to the EAT and is preferred where the lender on the replacement will not lend to an accommodation entity.

Lender coordination is the practical bottleneck. Many lenders will not lend to an EAT, will not permit the collateral to be held by one, and will require a guaranty and a specific structure. Talk to the lender before engaging the EAT, not after.

The improvement (build-to-suit) exchange. The taxpayer wants to use exchange proceeds to construct or improve the replacement property. Because improvements made after the taxpayer takes title do not count toward the exchange, the property is parked with an EAT, the improvements are constructed while the EAT holds title, and the improved property is transferred within the 180-day period.

Constraints: only improvements actually completed within the period count, the identification must describe the improvements as specifically as possible, and the transferred property must be substantially the same as identified. Long construction timelines simply do not fit within 180 days, and the honest answer for a multi-year development is that § 1031 will not fund it.

Entities, partnerships, and the drop and swap

The taxpayer that sells must be the taxpayer that buys. Same taxpayer identification number, same entity — with the exception that a disregarded entity (a single-member LLC, a grantor trust, a QSub) is treated as its owner, so selling from an SMLLC and buying into a different SMLLC owned by the same taxpayer is fine.

The partnership problem. A partnership owning real property may exchange the property, deferring gain at the partnership level. But a partnership interest is expressly excluded from § 1031, so a partner cannot exchange their interest, and partners who disagree — some wanting to cash out, others wanting to exchange — have a genuine structural conflict.

The drop and swap. The partnership distributes undivided tenancy-in-common interests to the partners, who then each dispose of their TIC interests, some exchanging and some paying tax.

The risk: the "held for productive use in a trade or business or for investment" requirement and the judicially developed holding-period expectations. The IRS may argue the TIC interest was held only momentarily and for the purpose of the exchange rather than for investment, and may attempt to recharacterize the transaction under the step transaction doctrine. Courts have gone both ways, generally examining the partners' intent and the substance of the arrangement.

Practical risk management:

  • Do it early. A drop well before the property is marketed is far more defensible than one executed days before closing.
  • Respect the TIC form. A tenancy-in-common agreement, separate reporting, direct receipt of income and payment of expenses, and no continued partnership filings.
  • Consider the swap and drop variant instead — the partnership completes the exchange and later distributes interests in the replacement — which has its own timing considerations.
  • Consider IRC § 761(a) election to be excluded from subchapter K, available for genuine co-ownership arrangements meeting the conditions.
  • Get tax advice specific to the facts. This is the single most audited structure in § 1031 practice.

TIC structures as replacement property. Revenue Procedure 2002-22 sets out the conditions under which the IRS will consider a ruling that a TIC arrangement is a co-ownership rather than a partnership — no more than 35 co-owners, unanimous approval for major decisions, limits on the manager's authority, restrictions on debt, and others. Sponsors follow these conditions in structuring TIC offerings.

Delaware statutory trusts. Revenue Ruling 2004-86 holds that a beneficial interest in a properly structured DST is treated as an undivided interest in the underlying real property and therefore qualifies as replacement property. DSTs solve real problems — a taxpayer with $600,000 to place and 45 days can acquire a fractional interest in institutional real estate — at real costs: no control, sponsor fees, illiquidity, and the "seven deadly sins" restrictions on the trustee that prevent renegotiating leases or refinancing, which can strand a property in a downturn.

UPREIT / § 721 exchange. A taxpayer contributes property to an operating partnership of a REIT in exchange for OP units, tax-free under IRC § 721, with the units later convertible into REIT shares (a taxable event). Frequently structured as a 1031 into a DST followed by a § 721 contribution. Provides diversification and liquidity, and terminates the ability to do further 1031 exchanges with that value.

Related-party exchanges

IRC § 1031(f) addresses exchanges between related persons, defined by reference to §§ 267(b) and 707(b) — family members, controlled entities, and related partnerships.

The two-year rule. If a taxpayer exchanges property with a related person and either party disposes of the property within two years, the nonrecognition is retroactively disallowed and the gain is recognized as of the date of the later disposition. Exceptions apply for dispositions after the death of either party, in a compulsory or involuntary conversion, or where it is established that neither the exchange nor the disposition had tax avoidance as one of its principal purposes.

The anti-abuse provision, § 1031(f)(4), disallows nonrecognition for any exchange that is part of a transaction structured to avoid the related-party rules. The IRS has applied this to the common structure in which a taxpayer sells to an unrelated buyer through a QI and buys the replacement from a related party — the concern being that the related party cashes out at a low basis while the taxpayer defers.

The practical guidance:

  • Buying replacement property from a related party is high-risk and generally should be avoided. Where it is unavoidable, the related party should itself complete an exchange, so no basis-shifting cash-out occurs.
  • Selling relinquished property to a related party is more defensible, particularly where both parties exchange and both hold for two years.
  • File Form 8824 identifying the related party and continue to file it for the two years following.

State issues

Conformity varies. Most states conform to § 1031, but a few do not fully, and several impose their own reporting.

Clawback provisions. Several states — California most prominently — require ongoing reporting when a taxpayer exchanges property located in the state for property located elsewhere, and tax the deferred gain when the replacement is ultimately sold in a taxable transaction. California requires an annual Form 3840 for as long as the deferred gain remains, and failure to file permits the state to assess the deferred gain. Oregon, Montana, and Massachusetts have analogous provisions.

Withholding. Many states require withholding on real property sales by nonresidents, with an exemption or certification procedure for exchanges. File the exemption certificate before closing; recovering improperly withheld amounts takes a year.

Transfer taxes are generally imposed on the transfer regardless of federal deferral, and both legs of an exchange may be taxed.

Local considerations — reassessment for property tax purposes on a change in ownership, which in California is governed by Proposition 13 and its implementing rules and can dwarf the income tax analysis.

A working timeline

Before listing the relinquished property

  • Confirm the property qualifies — held for investment or business use, not dealer property.
  • Confirm the taxpayer that holds title, and that the same taxpayer will acquire.
  • Model the transaction: expected price, debt payoff, basis, gain, and the value and debt required on the replacement to achieve full deferral.
  • Identify and vet a qualified intermediary, and confirm no disqualified-person problem.
  • Add cooperation language to the listing and purchase agreements: the parties agree to cooperate in an exchange at no cost or liability to the buyer.

Before the relinquished closing

  • Execute the exchange agreement and the assignment of the purchase contract.
  • Deliver written notice of assignment to the buyer, and confirm it is acknowledged in writing.
  • Confirm the settlement statement directs proceeds to the QI.
  • Confirm no proceeds are released to the taxpayer for any purpose.
  • Begin identifying candidate replacement properties now, not on day 40.

Days 1–45

  • Tour, underwrite, and negotiate.
  • Deliver the written identification, signed, to the QI, with proof.
  • Identify three properties. Confirm descriptions are unambiguous.

Days 46–180

  • Contract, diligence, and finance the replacement.
  • Assign the purchase contract to the QI and notify the seller.
  • Confirm debt replacement and any additional cash needed.
  • Close by day 180 or the extended return due date, whichever is earlier. Extend the return if the sale occurred late in the year.

Filing

  • Form 8824 with the return for the year of the relinquished transfer, reporting the exchange, the dates, the values, and any boot.
  • State forms, including any ongoing clawback reporting.
  • Retain the exchange agreement, identification, closing statements, and QI accounting permanently — the basis of the replacement property depends on them, and a sale twenty years later will require them.

Common failures

  1. Closing the sale before engaging a QI. Fatal, and not fixable.
  2. Using the taxpayer's own attorney or CPA as QI. Disqualified person; the safe harbor fails.
  3. Missing the 45-day identification, or identifying ambiguously.
  4. A December sale with no return extension, cutting the 180 days to the April due date.
  5. Identifying one property that falls out of contract.
  6. Debt relief not replaced, producing tax in an otherwise successful exchange.
  7. Paying non-exchange expenses from exchange funds, creating boot.
  8. Buying replacement property from a related party.
  9. A drop and swap executed days before closing, with no documented investment intent.
  10. Failing to file Form 3840 or its analogue in a clawback state, year after year.
  11. A construction timeline that cannot finish within 180 days.
  12. The wrong taxpayer on one side — an individual sells and an LLC buys, or a partnership sells and the partners buy.

The honest framing

Section 1031 is a deferral, not an exemption. The gain persists in the replacement property's low basis and is recognized whenever the taxpayer sells without exchanging again. For an investor who intends to hold real estate indefinitely, and whose heirs will receive a stepped-up basis, that deferral is functionally permanent and enormously valuable. For an investor who will need liquidity in five years, it merely postpones the bill while constraining the choice of replacement property and imposing real transaction costs.

The discipline the statute demands is modest but absolute: engage the intermediary before the closing, identify in writing by day 45, replace the value and the debt, and close by day 180. Every one of those is a calendar item, and every failed exchange this author has seen failed on one of them rather than on any subtlety of the law.

Put the dates on a calendar the day the relinquished property goes under contract, and give a copy to the client, the broker, the lender, and the accountant.

Alternatives when § 1031 does not fit

Not every appreciated property should be exchanged, and a client asking about a 1031 sometimes has a different problem.

Installment sale under IRC § 453. Spreads gain over the years payments are received, at the cost of holding a note. Interest is imputed if not stated adequately, depreciation recapture under § 1245 is recognized entirely in the year of sale regardless of the installment method, and a large installment obligation may trigger an interest charge under § 453A. Useful where the seller wants income rather than replacement property, and where the buyer's credit is acceptable.

Opportunity zone investment. Gain from any sale invested in a qualified opportunity fund within 180 days defers the gain to a statutory recognition date and, if the investment is held for at least ten years, permits the appreciation in the fund investment to be excluded entirely. Advantages over § 1031: only the gain must be reinvested rather than the entire proceeds, and the replacement need not be real estate. Disadvantages: the original gain is eventually recognized, the fund must meet substantial improvement and asset tests, and the program's parameters have changed over time.

Charitable remainder trust. The owner contributes the property to a CRT, which sells it without immediate tax, pays the donor an annuity or unitrust amount for life or a term, and distributes the remainder to charity. Produces an income tax deduction, diversification, and an income stream, at the cost of giving up the remainder. Appropriate for an older owner with a low-basis property, no heirs needing the asset, and charitable intent — and only where the intent is genuine.

Section 121 exclusion, alone or in combination. A principal residence that was converted to a rental may qualify for both the § 121 exclusion on the residence portion and § 1031 deferral on the balance, subject to the nonqualified use rules that reduce the exclusion for periods the property was not a principal residence.

Simply paying the tax. Underrated. An investor forced into an unsuitable replacement property by a 45-day clock has frequently made a worse decision than one who paid a capital gains rate and bought what they actually wanted six months later. The tax is a known number; a bad building is not.

Hold and refinance. Where the objective is liquidity rather than repositioning, a cash-out refinancing produces tax-free proceeds and preserves the basis step-up at death. It adds debt service, and it is available only where the property supports the loan — but for an owner who wants money rather than a different property, it is often the right answer and it involves no deadlines at all.

Contract drafting for an exchange

The purchase and sale agreements on both legs should anticipate the exchange. Standard provisions, and what each is for:

Cooperation clause. "Buyer acknowledges that Seller intends to effect a like-kind exchange under Section 1031 of the Internal Revenue Code and agrees to cooperate in effecting such exchange, including consenting to the assignment of Seller's rights under this Agreement to a qualified intermediary, provided that Buyer shall incur no additional cost, expense, delay, or liability and shall not be required to take title to any other property."

That last clause is what makes the provision acceptable to the other side, and it should be included rather than fought over.

Assignment consent. An express consent to the assignment of the contract to a QI, so the assignment does not violate a general anti-assignment provision.

No representation. A statement that the cooperating party makes no representation as to the tax treatment of the exchange and has no liability if it fails. Expect the other side to ask for it; it is reasonable.

Timing accommodation. Where the exchange requires a closing on a particular date to fit within the 180-day window, say so and make the date material. Conversely, resist a provision that permits the other side to extend beyond the deadline, because the extension destroys the exchange rather than helping it.

In a reverse exchange, the replacement purchase agreement must permit assignment to the exchange accommodation titleholder, and the lender's loan documents must accommodate a borrower that is an accommodation entity — which is a negotiation to start early.

On the relinquished side, if the buyer is also doing an exchange (both parties frequently are), each contract needs the cooperation clause running in the other direction, and the closing agent needs clear instructions about which funds go where.

A word to closing agents and title companies. They see these constantly and generally handle them well, but the settlement statement must reflect the QI as the recipient of the proceeds, and any credit or proration paid to the seller directly is boot. Review the draft settlement statement against the exchange structure two days before closing, not at the table.

Primary authority

  • 26 U.S.C. § 1031 — like-kind exchanges, limited since 2017 to real property held for productive use in a trade or business or for investment.
  • 26 U.S.C. § 1031(a)(3) — the 45-day identification and 180-day exchange deadlines, which are statutory and not subject to equitable extension.
  • Treas. Reg. § 1.1031(k)-1 — deferred exchanges: the identification rules in § 1.1031(k)-1(c), the three-property and 200-percent alternatives, the qualified intermediary safe harbor in § 1.1031(k)-1(g)(4), and the disqualified person definition in § 1.1031(k)-1(k).
  • Treas. Reg. § 1.1031(a)-3 — the definition of real property for exchange purposes, including incidental personal property.
  • Rev. Proc. 2000-37, as modified by Rev. Proc. 2004-51 — the reverse exchange safe harbor and the exchange accommodation titleholder.
  • Rev. Proc. 2002-22 — tenancy-in-common interests treated as real property rather than a partnership interest, the basis of the modern DST and TIC market.
  • Rev. Rul. 2004-86 — Delaware statutory trust interests qualify as replacement property.
  • 26 U.S.C. § 1031(f) — related-party exchanges and the two-year holding rule.
  • 26 U.S.C. § 1245 and § 1250 — depreciation recapture, and § 1400Z-2 for the opportunity zone alternative when an exchange fails.
  • IRS Form 8824 — the reporting the exchange ultimately lives or dies on.

Related articles

This guide is provided for general informational purposes and does not constitute legal or tax advice. The § 1031 deadlines are statutory and cannot be extended except by IRS disaster relief, state conformity and clawback rules vary, and related-party and partnership structures raise fact-specific risks. Consult qualified tax counsel and a qualified intermediary before the relinquished property closes.