IRC 1031 Like-Kind Exchange: Qualified Intermediary Rules, Deadlines, and Practitioner Guide

IRC 1031 is the most widely used capital gain deferral tool available to real estate investors. When structured correctly, it defers both capital gain and depreciation recapture on the exchange of real property for like-kind real property held for investment or productive use in a trade or business. The Tax Cuts and Jobs Act (TCJA) restricted the provision to real property only; personal property, equipment, vehicles, and intangibles no longer qualify. What remains is a powerful but deadline-driven mechanism that leaves no room for administrative flexibility: the 45-day identification window and the 180-day exchange period are hard statutory requirements with no extensions. A single missed deadline unwinds the entire deferral.

This guide is written for enrolled agents, CPAs, and tax attorneys advising clients who hold investment real estate or business real property. It covers the post-TCJA scope of IRC 1031, the statutory deadlines, Qualified Intermediary (QI) requirements and risks, boot recognition categories, like-kind property standards, related party rules under IRC 1031(f), partnership-level strategies, and reverse and improvement exchanges. It closes with a practitioner checklist and a FAQ section for client communication. All IRC citations and regulatory references should be verified at IRS.gov and the Electronic Code of Federal Regulations before relying on them in a specific engagement.

This guide is informational and does not constitute legal or tax advice for any specific situation. Clients with pending or planned exchanges should work with a qualified tax professional and independent legal counsel.

Section 1: Overview and Post-TCJA Scope of IRC 1031

IRC 1031 has existed in the tax code since 1921 and originally applied to exchanges of both real and personal property of like kind. The provision permitted real estate investors, equipment owners, and business operators to exchange assets without triggering immediate gain recognition, deferring tax until the taxpayer ultimately disposed of the replacement property in a taxable transaction.

TCJA restriction to real property only

The Tax Cuts and Jobs Act, effective for exchanges completed after December 31, 2017, restricted IRC 1031 to real property. Personal property (equipment, vehicles, aircraft, artwork, intangibles, patents, and similar assets) no longer qualifies for like-kind exchange treatment. Taxpayers who exchanged personal property before the TCJA effective date retained deferral under transitional rules, but all new exchanges on or after January 1, 2018, must involve real property on both sides to qualify. OBBBA did not modify IRC 1031 for real property exchanges; the restriction to real property is the current statutory rule for 2025 and 2026 exchanges.

What "like kind" means for real property

For real property, "like kind" is broadly defined. The term refers to the nature or character of the property, not its grade, quality, or specific use. Any real property held for investment or productive use in a trade or business is of like kind to any other real property held for the same purpose, even if the property types differ significantly. An apartment building exchanged for raw land qualifies. Commercial property exchanged for a residential investment property qualifies. Farmland exchanged for an industrial warehouse qualifies. The breadth of the like-kind definition for real property is one of the primary advantages of the post-TCJA framework.

One important restriction: only domestic US real property qualifies. Under IRC 1031(h), US real property and foreign real property are not like kind to each other. An exchange of US real property for foreign real property does not qualify for deferral under IRC 1031.

What does NOT qualify

The following property categories are expressly excluded from like-kind exchange treatment under IRC 1031(a)(2) and the post-TCJA restriction:

• Inventory or property held primarily for sale (stock in trade)
• Stocks, bonds, notes, or other securities
• Interests in a partnership (IRC 1031(a)(2)(D); hedge the scope of this exclusion and any exceptions to IRS.gov)
• Certificates of trust or beneficial interest
• Choses in action
• Personal-use real property, including a primary residence, second home, or vacation property where the personal-use test is not met
• Foreign real property exchanged for US real property, or US real property exchanged for foreign real property (IRC 1031(h))

The holding purpose requirement

Both the relinquished property and the replacement property must be held for productive use in a trade or business or for investment. Personal-use real property does not qualify. A taxpayer's primary residence is not exchange-eligible under IRC 1031, though it may be eligible for exclusion under IRC 121 in appropriate circumstances, which is a separate analysis. The purpose for holding the property at the time of the exchange controls; taxpayers who convert personal-use property to investment use before an exchange should document that conversion carefully.

Section 2: The 45-Day Identification Deadline

IRC 1031(a)(3)(A) requires that the replacement property be identified in writing within 45 days of the date on which the taxpayer transfers (closes on) the relinquished property. This deadline is a hard statutory requirement. There are no exceptions for weekends, holidays, financial hardship, or any other circumstance. The identification deadline is the first critical control point in a deferred exchange, and a missed Day 45 deadline is fatal to the exchange.

Written identification requirements

The identification must be in writing, signed by the taxpayer, and delivered to the QI or to the seller of the replacement property by midnight of Day 45. The identification document must unambiguously describe each replacement property, typically by legal description, street address, or distinguishing name. Verbal identification does not satisfy the requirement. The QI typically provides an identification form; practitioners should confirm with the QI that the identification procedure satisfies Treas. Reg. 1.1031(k)-1(c) before closing.

The three identification rules

A taxpayer may identify replacement property under one of three rules established under Treas. Reg. 1.1031(k)-1(c). The taxpayer must satisfy at least one rule; identified properties that exceed the applicable rule's limits are treated as not identified. Hedge specific application and edge cases to Treas. Reg. 1.1031(k)-1(c) and IRS.gov.

Best practice: do not wait for Day 45

Many practitioners advise clients to aim for identification by Day 30. This provides a 15-day buffer for complications, title issues, seller negotiations, or QI procedural requirements. A client who begins property identification on Day 40 is operating with no margin for error. The identification deadline should be calendared immediately upon closing on the relinquished property, with client reminders at Day 21 and Day 35.

Section 3: The 180-Day Exchange Period

IRC 1031(a)(3)(B) requires that the taxpayer receive the replacement property no later than the earlier of: (a) 180 days after the date of transfer of the relinquished property, or (b) the due date (including extensions) of the taxpayer's federal tax return for the year in which the relinquished property was transferred. The operative deadline is whichever falls first.

The return due date trap

For calendar-year individual taxpayers, the return due date (April 15) often falls before Day 180 when an exchange is initiated late in the tax year. This creates a trap that many clients and some practitioners overlook.

Example: if a calendar-year taxpayer closes on the relinquished property on November 1, 2026, Day 180 falls on April 30, 2027. But the return due date without extension is April 15, 2027. Without a timely extension, the effective exchange deadline is April 15, 2027, not Day 180. Filing Form 4868 for an automatic 6-month extension moves the return due date to October 15, 2027, which falls after Day 180, restoring the full 180-day window. For any exchange initiated after October 17 in a given calendar year, practitioners should advise the client to extend the tax return as a standard procedural step to preserve the full 180-day period.

No extensions to the 180-day period

The 180-day period itself cannot be extended by administrative action, IRS relief, or any agreement between the parties. The return extension (Form 4868) does not extend Day 180; it extends the return due date, which indirectly restores the full 180-day window when the due date would otherwise fall earlier. No COVID-era extensions or other administrative relief provisions remain available for 2025-2026 exchanges.

Section 4: The Qualified Intermediary Requirement

For any deferred exchange (where the taxpayer sells the relinquished property before purchasing the replacement property), a Qualified Intermediary is required to prevent constructive receipt of the exchange proceeds by the taxpayer. If the taxpayer receives or has constructive receipt of the exchange funds at any point before the replacement property is acquired, the exchange is disqualified and the gain is taxable. The QI safe harbor under Treas. Reg. 1.1031(k)-1(g)(4) is the mechanism that prevents constructive receipt; it is not optional for standard deferred exchanges.

Who can and cannot serve as QI

The QI cannot be:

• The taxpayer
• An agent of the taxpayer within the 2-year period ending on the date of the transfer of the relinquished property, including the taxpayer's attorney, CPA, investment banker or broker, real estate agent or broker, or employee
• A person who is related to the taxpayer under IRC 267(b) or 707(b) within the 2-year period ending on the date of the transfer of the relinquished property

The specific disqualifiers and the scope of the agent and related-party definitions are detailed in Treas. Reg. 1.1031(k)-1(g)(4) and IRS.gov. A taxpayer's regular CPA or tax attorney generally cannot serve as the QI for a transaction they are advising on. Practitioners who are asked by a client to act as QI should decline and refer the client to an independent QI provider.

QI functions in a deferred exchange

In a standard deferred exchange, the QI performs the following functions (hedge specific contractual requirements to Treas. Reg. 1.1031(k)-1(g)(4) and IRS.gov):

• Enters into a written exchange agreement with the taxpayer before the transfer of the relinquished property
• Acquires the relinquished property from the taxpayer (or takes an assignment of the taxpayer's rights) and transfers it to the buyer
• Holds the exchange proceeds in a segregated escrow or qualified trust account during the exchange period
• Acquires the replacement property from the seller (or takes an assignment of the taxpayer's rights) and transfers it to the taxpayer

QI risks: insolvency, fraud, and uninsured funds

There is currently no federal licensing or registration requirement for QIs. Any entity can hold itself out as a QI, subject to any applicable state-level QI regulations. Exchange proceeds held by a QI are typically not FDIC-insured. QI insolvency is a documented risk: several large QI failures have occurred in which exchange proceeds were lost or frozen, leaving taxpayers unable to complete exchanges and facing both tax liability and financial loss.

Practitioners advising clients on QI selection should recommend that the client:

• Select a QI with fidelity bonding and errors-and-omissions insurance coverage for exchange proceeds
• Verify that exchange funds will be held in a segregated, bankruptcy-remote account in the client's name, not commingled with the QI's operating funds
• Use a reputable QI with an established track record; affiliated national title companies and bank-affiliated QIs with audited operations are generally lower-risk than newly formed or small independent QI providers
• Review any applicable state QI regulations for the state where the relinquished property is located

Practitioners should confirm any applicable state QI licensing or bonding requirements with the applicable state tax authority, as some states impose QI-specific requirements beyond the federal framework.

Section 5: Boot Recognition

"Boot" is the non-like-kind property or value received in a like-kind exchange. Boot is taxable in the year of the exchange, to the extent of the taxpayer's realized gain. A taxpayer cannot defer more gain than the net like-kind value received in the exchange; any value received outside of like-kind real property is boot and triggers immediate recognition.

The three categories of boot

Netting of boot categories

Cash boot and mortgage boot net against each other. A taxpayer who takes on additional debt on the replacement property (debt assumed exceeds debt relieved) can offset that additional debt against cash boot. However, cash paid by the taxpayer out of pocket to equalize a mortgage deficiency does not offset mortgage boot received; the netting operates only within the overall boot calculation framework. Practitioners should model all boot categories before closing to avoid recognition surprises.

Depreciation recapture in the exchange

Even in a fully deferred exchange with no boot, depreciation recapture under IRC 1245 and IRC 1250 does not disappear; it carries over to the replacement property and accelerates on ultimate sale. The replacement property's basis is reduced to reflect deferred depreciation recapture, so when the replacement property is eventually sold in a taxable transaction, the recapture is recognized at that time. To the extent boot is received in the exchange, IRC 1245 and IRC 1250 recapture is recognized first (as ordinary income) before capital gain. Hedge specific calculation mechanics to the applicable regulations and IRS.gov. For a full treatment of the recapture rules, see the IRC 1245 and 1250 depreciation recapture guide.

Section 6: Like-Kind Property and Replacement Property Considerations

The like-kind standard for real property is deliberately broad. The regulations under Treas. Reg. 1.1031(a)-1 define like kind as referring to the nature or character of the property, not its grade or quality. For real property held for investment or business use, nearly any exchange of US real property for other US real property satisfies the standard.

Examples of qualifying exchanges

• Commercial real property exchanged for residential investment property (apartment building)
• Farmland exchanged for commercial or industrial property
• Raw land exchanged for improved real property
• Improved investment real estate exchanged for other improved investment real estate in a different state
• Fee simple interest in real property exchanged for a tenancy-in-common (TIC) interest in real property (hedge to Rev. Rul. 2002-22 and applicable guidance)
• Delaware Statutory Trust (DST) interests, which are treated as direct ownership interests in real property for IRC 1031 purposes (hedge to IRS Private Letter Rulings, Rev. Rul. 2004-86, and IRS.gov)

US domestic real property only

IRC 1031(h) expressly provides that US real property and foreign real property are not like kind. An investor who holds US rental real estate cannot exchange into foreign investment property and defer gain under IRC 1031. This restriction applies regardless of the nature or quality of the foreign real property; the domestic/foreign distinction is categorical.

Tenancy-in-common and DST interests

TIC interests in real property qualify as replacement property in a 1031 exchange; hedge specifics to Rev. Rul. 2002-22 and applicable guidance. Delaware Statutory Trust interests have been treated by the IRS in Private Letter Rulings and Rev. Rul. 2004-86 as direct ownership interests in real property for 1031 exchange purposes, making them a commonly used replacement property structure for investors seeking fractional ownership without active management responsibility. Practitioners should verify current IRS guidance at IRS.gov before advising clients to use DST interests as replacement property, as this area has developed through non-precedential guidance.

Section 7: Related Party Exchanges (IRC 1031(f))

IRC 1031(f) imposes special rules on exchanges between related parties. The concern is that related parties could use a 1031 exchange to effectively cash out a high-basis party's property while shifting high-appreciation property to a low-basis holder, avoiding recognition of gain that would otherwise be taxable.

The 2-year holding period requirement

Under IRC 1031(f), a taxpayer who exchanges property with a related party (as defined under IRC 267 or 707(b)) must hold both the property transferred and the property received for at least 2 years after the date of the last transfer that was part of the exchange. If either the taxpayer or the related party disposes of either property within 2 years of the exchange, the exchange is disqualified retroactively and gain is recognized in the year of disposition. The 2-year clock runs from the date of the exchange, not the date of the original acquisition.

Related party definition under IRC 1031(f)

For purposes of IRC 1031(f), related party includes:

• Family members within the meaning of IRC 267(b) (siblings, spouses, ancestors, and lineal descendants)
• A corporation in which the taxpayer owns, directly or indirectly, more than 50% of the value of the outstanding stock
• A partnership in which the taxpayer owns, directly or indirectly, more than 50% of the capital or profits interests
• Trusts and estates with common beneficiaries or grantors, as defined under IRC 267(b)

Indirect related-party transactions

The IRS has applied IRC 1031(f) to transactions structured to achieve what is effectively a related-party exchange even without a direct transfer between related parties. Using a QI to route what is economically a transfer between related parties does not avoid the application of IRC 1031(f) where the substance of the exchange is a sale between related parties. Practitioners should evaluate any transaction where a related party is on either side of the exchange, even when the structure uses a QI.

Exceptions to IRC 1031(f)

The 2-year holding period disqualification does not apply to dispositions that occur by reason of: (a) the death of the taxpayer or the related person; (b) a compulsory or involuntary conversion under IRC 1033, if the exchange was not arranged in anticipation of the conversion; or (c) a transaction in which neither the taxpayer's exchange nor the related person's exchange was designed to avoid federal income tax. The burden of establishing that the "not designed to avoid tax" exception applies rests with the taxpayer.

Section 8: Drop-and-Swap and Swap-and-Drop (Partnership Issues)

A partnership cannot conduct a 1031 exchange on behalf of its individual partners. Under IRC 1031(a)(2)(D), a partnership interest is expressly excluded from like-kind exchange treatment. The exchange right belongs to the owner of the real property, not to the entity that holds a partnership interest in the property-owning entity. When a partnership holds real property and one or more partners want to conduct a 1031 exchange, the transfer must occur at the ownership level, not the partnership interest level. Two planning structures are commonly used to address this: drop-and-swap and swap-and-drop. Both are areas of heightened IRS scrutiny; practitioners should hedge all specifics to Treas. Reg. 1.1031(a)-1, applicable case law, and tax counsel.

Drop-and-swap

In a drop-and-swap, the partnership distributes undivided tenancy-in-common interests in the real property to each partner (the "drop") before the sale. Each partner, now a direct TIC owner of the real property, can then conduct their own IRC 1031 exchange on their proportionate interest (the "swap"). The structure converts partnership ownership into direct property ownership at the partner level, where each partner individually satisfies the IRC 1031 holding and use requirements.

The central IRS scrutiny point is whether the TIC interest was held for investment or for productive use in a trade or business at the time of the exchange, as IRC 1031 requires. A partner who receives a TIC interest and immediately exchanges it without any holding period faces a challenge to whether the interest was held for investment purposes, or merely as a transitory step to facilitate a sale. The IRS has challenged drop-and-swaps with short holding periods between the distribution and the sale. Hedge all drop-and-swap planning to Treas. Reg. 1.1031(a)-1 and applicable case law, and advise clients that there is no bright-line safe-harbor holding period. Tax counsel review is warranted before execution.

Swap-and-drop

In a swap-and-drop, the partnership conducts the 1031 exchange and acquires the replacement property. After a period of holding, the partnership liquidates or distributes partnership interests to the partners (the "drop"). The concern here is whether the partnership intended from the outset to dispose of the replacement property immediately after acquisition, which would undermine the holding-for-investment requirement on the replacement property side. As with drop-and-swap, a brief holding period between the exchange and the liquidation raises questions that the IRS may scrutinize.

Section 9: Reverse Exchanges and Improvement Exchanges

The standard deferred exchange follows a sequential pattern: the taxpayer sells the relinquished property first, then acquires the replacement property within the exchange period. Two variations accommodate different transaction sequences: the reverse exchange and the improvement (build-to-suit) exchange. Both are more complex than a standard deferred exchange and require an Exchange Accommodation Titleholder. Hedge all specifics to Rev. Proc. 2000-37 and IRS.gov before advising a client to use either structure.

Reverse exchange

In a reverse exchange, the taxpayer acquires the replacement property before selling the relinquished property. Because the taxpayer cannot hold both the replacement and relinquished properties simultaneously (as that would defeat the exchange structure), an Exchange Accommodation Titleholder (EAT) is used. Under Rev. Proc. 2000-37, the EAT holds legal title to either the replacement property (parked with the EAT while the taxpayer sells the relinquished property) or the relinquished property (parked with the EAT while the taxpayer holds the replacement property) for a period not exceeding 180 days.

The 180-day period applies to the EAT's holding of either property. The identification rules still apply within the framework. Hedge all EAT qualification requirements, exchange agreement mechanics, and safe-harbor conditions to Rev. Proc. 2000-37 and IRS.gov; outside the Rev. Proc. 2000-37 safe harbor, the tax treatment of reverse exchanges is less certain and requires careful structural review.

Improvement (build-to-suit) exchange

In an improvement exchange, the taxpayer uses exchange proceeds to fund improvements to the replacement property during the exchange period, with the goal of completing construction and receiving the improved property within the 180-day window. The EAT holds title to the replacement property during the improvement period and transfers the improved property to the taxpayer before the exchange deadline. All improvements must be completed and the property must be transferred to the taxpayer within 180 days of the closing on the relinquished property; improvements completed after the 180-day deadline do not count toward the exchange.

Hedge all improvement exchange structural requirements, construction escrow mechanics, and EAT arrangements to Rev. Proc. 2000-37 and IRS.gov. The 180-day constraint makes improvement exchanges challenging for large construction projects.

Section 10: Practitioner Checklist

The following checklist summarizes the key due-diligence steps for practitioners advising clients on IRC 1031 deferred exchanges. This checklist is a reference tool only; it does not substitute for a full legal and tax analysis of the specific transaction.

• Confirm both properties qualify. Verify that both the relinquished property and the replacement property are real property (not personal property), held for productive use in a trade or business or for investment (not primary residence or personal use), and domestic US real property (not foreign real property). Confirm the taxpayer is not a dealer holding the property primarily for sale.
• Identify related party issues before execution. Determine whether any potential replacement property seller or buyer is a related party under IRC 267 or 707(b). If a related party is involved on either side, evaluate the IRC 1031(f) 2-year holding period requirement before proceeding.
• Select a reputable, bonded QI well in advance of closing. Confirm the QI's bonding, insurance, and fund segregation practices. Verify the QI is not disqualified under the agent or related-party tests. Have the exchange agreement in place before closing on the relinquished property.
• Calendar Day 45 and Day 180 from the date of closing on the relinquished property. Set client reminders at Day 21 and Day 35 for the identification deadline. The deadlines are hard and cannot be extended.
• If the exchange initiates after October 17 (for a calendar-year taxpayer), file Form 4868. This extends the return due date to October 15 of the following year, preserving the full 180-day exchange window and preventing the unextended April 15 due date from cutting off the exchange period before Day 180.
• Prepare and deliver the identification letter by Day 45. The letter must be in writing, signed by the taxpayer, and delivered to the QI or to the seller of the replacement property by midnight of Day 45. Confirm delivery; retain a copy with the exchange file.
• Calculate potential boot before closing. Model all three boot categories (cash, mortgage, and non-like-kind property) before the replacement property closing. Confirm the taxpayer understands the tax consequence of any boot. Do not allow clients to discover boot at tax time.
• Plan for mortgage boot if the replacement property will carry lower debt. If the taxpayer is relieving debt on the relinquished property in excess of debt assumed on the replacement property, quantify the mortgage boot and advise the taxpayer on whether to take on additional financing, pay cash to offset, or recognize the boot.
• Document the investment or business purpose of both properties. Retain documentation of how each property was held and used. For replacement property, document the intended holding purpose from the date of acquisition. Avoid prearranged sale agreements on replacement property that could indicate the property was not held for investment.

Frequently Asked Questions

Related Practitioner Guides

The following guides cover tax rules that practitioners regularly analyze alongside a like-kind exchange.

• IRC 453 Installment Sale and Form 6252 Guide -- a like-kind exchange that involves installment obligations from the relinquished property creates a combined 1031/453 analysis; the installment sale rules determine whether deferred gain must be recognized when the taxpayer receives a note at closing; practitioners model both computations together for seller-financed exchanges.
• IRC 1245 and 1250 Depreciation Recapture Guide -- depreciation recapture under IRC 1245 is not deferred by a like-kind exchange and must be recognized as ordinary income in the year of disposition; the practitioner must compute recapture before determining deferred gain; the two guides are used together for every exchange involving depreciable real or personal property.
• Qualified Opportunity Zone Form 8997 Guide -- gain recognized on a partial exchange (boot) or on a failed exchange can be reinvested in a qualified opportunity zone fund within 180 days; practitioners model 1031 and QOZ as complementary strategies for high-basis real estate dispositions; the two guides are read together when gain recognition is unavoidable.
• IRC 6501 Audit Statute of Limitations Guide -- the IRS has 3 years from the filing of the return that reports the deferred gain to assess tax on a like-kind exchange; a failed or partially failed exchange that goes unreported may leave the statute open indefinitely; practitioners use the SOL guide alongside the 1031 guide when an exchange is under examination.
• IRC 267 Related Party Loss Disallowance Guide -- IRC 267(a)(1) disallows the loss on a related party sale; a qualifying IRC 1031 like-kind exchange avoids the IRC 267 loss issue at the time of the exchange, but IRC 1031(f) imposes a 2-year holding requirement for related party exchanges that practitioners must also analyze.
• IRC 121 Home Sale Exclusion and Principal Residence Gain Exclusion Practitioner Guide -- when a mixed-use property with both residential and rental or business use is evaluated for a potential IRC 1031 exchange, the residential portion may qualify for the IRC 121 exclusion while the rental or business portion may qualify under IRC 1031; the two nonrecognition provisions operate independently and must be computed separately before any combined structure is considered
• Form 8824 Like-Kind Exchange Reporting: Boot and Basis
• IRC 1221, 1222, 1223: Capital Asset Classification and Holding Period -- capital asset character and holding-period tacking under IRC 1223 after a like-kind exchange: how boot affects character.
• IRC 1231: Section 1231 Property, Netting, and Lookback Rule -- the gain character analysis for Section 1231 property before and after a like-kind exchange; Section 1231 property is the primary category of property exchanged under IRC 1031, and the recapture potential carries over to the replacement property.
• IRC 453A: Installment Sale Interest Charge -- when a like-kind exchange closes with installment boot (a buyer note for the cash equivalent portion), the deferred gain on the note is governed by IRC 453; if the aggregate face value of such notes from the same seller exceeds $5M at year end, IRC 453A imposes an annual interest charge on the deferred tax liability attributable to the boot note -- a hidden carrying cost that practitioners must model before recommending installment boot in an exchange.
• IRC 1001: Amount Realized and Gain or Loss Recognized -- the IRC 1001 amount realized computation is the starting point for every like-kind exchange: the total amount realized minus adjusted basis determines the deferred gain; whether the exchange fully defers gain or produces partial recognition depends on the IRC 1001 computation performed before applying the IRC 1031 nonrecognition rules.
• IRC 856 REIT Qualification -- REIT asset qualification rules governing real property held in like-kind exchange structures and the treatment of boot received by REIT subsidiaries.
• IRC 857 REIT taxation -- REIT taxable income, 90% distribution requirement, capital gain dividends, and Form 1120-REIT.