1031 Exchange Related Party Rules
IRC §1031(f) restricts exchanges between family members, controlled entities, and common-ownership partnerships. The rule is narrower than most investors expect — but the traps are real, and violating it unwinds the deferral retroactively.
Why Congress added these rules
Before 1989, investors discovered they could use 1031 exchanges to shift basis between related parties while keeping economic control within the family or entity group. Congress responded with the Revenue Act of 1989, which added IRC §1031(f): a 2-year holding requirement on related-party exchanges designed to prevent basis-shifting without genuine economic change.1
The rule targets two concerns. First, a taxpayer who acquires replacement property from a related party shortly before the related party sells that property has effectively monetized appreciated real estate without paying tax — the QI mechanism was being used to launder the proceeds. Second, a taxpayer who sells relinquished property to a related party enables the related party to hold that property with a stepped-up basis, again eliminating gain that the exchange was supposed to merely defer.
Who counts as a related party
IRC §1031(f)(3) defines "related party" by cross-reference to two other code sections.1
Family members and individuals — IRC §267(b)
Under §267(b), the following pairs are related:2
- Family members: siblings (including half-siblings), spouse, ancestors (parents, grandparents, great-grandparents), and lineal descendants (children, grandchildren, great-grandchildren). Note that the §267(c)(4) definition of "family" does not include aunts, uncles, or cousins.
- Individual and corporation: an individual and a corporation in which that individual owns, directly or indirectly, more than 50% of the value of outstanding stock.
- Two corporations in a controlled group: corporations connected through a chain of ownership exceeding 50% of total combined voting power or value.
- Fiduciary and grantor of the same trust: and fiduciaries of two trusts with the same grantor.
- Tax-exempt organizations: a tax-exempt organization and a person who controls it.
Partnerships — IRC §707(b)(1)
Under §707(b)(1), a partnership and a person owning more than 50% of the capital interest or profits interest are related parties. Two partnerships in which the same persons own more than 50% of capital or profits interests are also related.3
The 50% ownership rule in practice
Many investors are surprised by the corporate and partnership tests. If you own 60% of an LLC that holds replacement property, you are a related party to that LLC. An exchange into a property owned by your 60%-held LLC would trigger §1031(f), even though you are effectively just moving property from one pocket to another. The same logic applies if you and your adult child together own 55% of the same holding company — both the individual and the entity-level tests apply.
The two-year holding rule: what it requires
IRC §1031(f)(1) provides: if a taxpayer exchanges property with a related party in a like-kind exchange, and either party disposes of the exchanged property within 2 years of the date of the last transfer in the exchange, then the gain that was deferred is recognized in the year of the disposition.1
The rule is bilateral and strict:
- You must hold the replacement property you received for 2 years.
- The related party must also hold whatever they received for 2 years.
- If either party sells, exchanges again, or otherwise disposes of their property before the 2-year mark, the original deferred gain is recognized — and you pay the tax in the year of that disposition, not the original exchange year.
The two scenarios where §1031(f) applies
Scenario 1: You acquire replacement property from a related party
You sell your relinquished property through a QI and use the proceeds to buy replacement property that is currently owned by a related party. Even if the transaction price is arm's length and the exchange mechanics are otherwise clean, §1031(f) applies. The related party now holds cash (your exchange proceeds); you hold their former property. If the related party uses those cash proceeds to exit a taxable position within 2 years — or if you sell the replacement property within 2 years — the deferred gain is recognized.
Scenario 2: A related party acquires your relinquished property
You sell your relinquished property through a QI, and a related party purchases it — either directly from the QI, or in a step shortly after the QI acquires it. The IRS has argued successfully in several cases that when a related party ends up with the relinquished property, regardless of the intermediate QI step, §1031(f) is implicated. If the related party then sells that property within 2 years of your exchange, your deferred gain is recognized in that year.
Exceptions to the 2-year rule
IRC §1031(f)(2) provides three exceptions that can allow an early disposition without triggering gain recognition:1
- (A) Death: If either party dies before the 2-year period expires, the early disposition rule does not apply. A stepped-up basis at death under IRC §1014 handles the gain separately.
- (B) Involuntary conversion: If the property is compulsorily or involuntarily converted under IRC §1033 (condemnation, casualty, or similar event) before the 2-year period expires, the related-party holding period rule does not trigger gain recognition.
- (C) No tax avoidance purpose: The IRS may determine that tax avoidance was not a principal purpose of the exchange, in which case gain recognition is not required. This is a facts-and-circumstances determination that is difficult to predict and should not be relied upon without a specific ruling or strong contrary facts.
The exceptions are narrow. An investor who structures a related-party exchange expecting to argue the "no tax avoidance" exception after the fact is taking significant risk. The first two exceptions — death and involuntary conversion — are mechanical and predictable. The third is not.
Worked example: how the tax hit materializes
A parent owns a 24-unit apartment building purchased in 2009 for $1,200,000. In early 2026, the property is worth $3,400,000. Accumulated depreciation on the building component is $580,000. The parent uses a 1031 exchange to acquire the adult daughter's commercial property, which has a value of $3,400,000 and no debt. The daughter takes the parent's apartment building as her new property in what looks like a clean swap.
Sixteen months after the exchange, the daughter receives a strong offer on the apartment building and sells it for $3,500,000.
Result: the daughter's sale triggers §1031(f)(1). The parent's deferred gain — which was never actually deferred because of the early disposition — is now recognized in the year of the daughter's sale.
| Tax component | Calculation | Estimated federal tax |
|---|---|---|
| §1250 unrecaptured gain (depreciation) | $580,000 × 25% | $145,000 |
| Long-term capital gain | $1,620,000 × 20% | $324,000 |
| Net investment income tax (NIIT) | $2,200,000 × 3.8% | $83,600 |
| Total estimated federal tax | ~$552,600 |
Gain = $3,400,000 − $1,200,000 basis = $2,200,000. Recapture = lesser of gain ($2,200,000) or accumulated depreciation ($580,000). State tax not included. Rates verified against 2026 tax law; OBBBA (July 2025) did not change §1031(f), §1250 recapture rate, LTCG rate, or NIIT.
The parent now owes over $550,000 in federal tax — in the year of the daughter's sale, not the parent's original exchange year — and may have no cash on hand to pay it because the exchange proceeds were used to acquire the replacement property. This is the scenario Congress was targeting, and it is exactly what §1031(f) produces.
Common traps
Exchanging into your own majority-owned LLC
If you own more than 50% of an LLC that holds the replacement property, you are a related party to that LLC under the §267(b)/§707(b)(1) analysis. This catches many investors who try to use a 1031 exchange to transfer appreciated property into an entity they control for estate-planning or asset-protection purposes. The exchange may technically complete, but the 2-year clock starts ticking — and if the LLC sells or distributes the property within 2 years, the deferred gain is recognized.
Disguised related-party transactions through intermediary entities
Constructive ownership rules under §267(c) apply to the §1031(f) analysis. Ownership held by family members is attributed to you; ownership held by corporations, partnerships, or trusts in which you have an interest is also attributed proportionally. A transaction that appears to involve an unrelated entity may actually qualify as a related-party exchange once constructive ownership is applied.
Planning to "hold 2 years" when a family member intends to sell earlier
The 2-year clock applies to both parties independently. Even if you intend to hold the replacement property for decades, if the related party who received your relinquished property sells within 2 years, your deferred gain is recognized in their year of sale. You need to be confident of the other party's holding intention before proceeding with a related-party exchange.
Planning strategies that avoid §1031(f)
Use unrelated-party transactions
The simplest avoidance strategy is to exchange into property that is not owned by a related party and to sell relinquished property to a buyer who is not related to you. A standard deferred exchange through an unrelated QI into an unrelated seller's property has no §1031(f) exposure. The statute only applies when a related party is on the other side of the exchange.
Delaware Statutory Trusts (DSTs)
DST interests are sold by unrelated sponsors. An investor completing a 1031 exchange into a DST interest is transacting with an unrelated institutional sponsor — not a family member or controlled entity. There is no §1031(f) issue. This is one reason DSTs are attractive to investors who want to restructure family real estate holdings: the DST step breaks the related-party chain entirely. See the DST guide for how this works.
UPREIT conversions after the 2-year hold
Some investors complete a clean (unrelated-party) 1031 exchange into direct property, hold for 2+ years, and then contribute to an UPREIT under IRC §721 — which is not a §1031 exchange and therefore not subject to §1031(f). See the UPREIT vs DST guide for the §721 conversion mechanics.
Structuring to satisfy the 2-year hold
If a related-party exchange genuinely makes economic sense — for example, consolidating family real estate into a single entity where all parties will hold long-term — the exchange can work if both parties commit contractually and practically to the 2-year hold. The commitment must be genuine: the IRS looks at actual disposition patterns, and a letter of intent that is immediately ignored provides no protection.
What a financial advisor does here
Related-party exchanges sit at the intersection of tax law, family dynamics, and entity structure. A fee-only financial advisor — working alongside a tax attorney and CPA — can:
- Map the constructive ownership structure. Identify whether any counterparty qualifies as related under §267(b) or §707(b)(1) before the exchange is structured, not after.
- Model the 2-year risk. Quantify the deferred tax at risk if either party's circumstances change — illness, financial pressure, estate event — within the 2-year window.
- Evaluate alternatives. Compare DST replacement, taxable sale, installment sale, or charitable strategies against the related-party exchange on an after-tax, after-risk basis.
- Coordinate with legal counsel. Ensure the exchange agreement, any holding-period commitments, and entity documents are consistent with the intended tax treatment.
Use the 1031 exchange calculator to estimate the deferred gain before a transaction, then connect below to speak with an advisor who can evaluate whether the related-party rules apply to your specific structure.
Sources
- IRC §1031(f) — Related Party Exchanges, Title 26 of the United States Code. Enacted Revenue Act of 1989. law.cornell.edu/uscode/text/26/1031
- IRC §267(b) — Losses, Expenses, and Interest with Respect to Transactions Between Related Taxpayers; definition of related persons. law.cornell.edu/uscode/text/26/267
- IRC §707(b)(1) — Transactions Between Partner and Partnership; definition of related partnerships. law.cornell.edu/uscode/text/26/707
- IRS Publication 544 — Sales and Other Dispositions of Assets; like-kind exchange rules and related party restrictions. irs.gov/publications/p544
Tax rates verified against 2026 rules (§1250 recapture 25%, LTCG 20%, NIIT 3.8%). OBBBA (July 2025) did not modify IRC §1031(f), the related-party rules, or the capital gains rate structure. Values current as of June 2026 — consult a qualified tax attorney and CPA before structuring any related-party exchange.
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