The 1031 exchange related party rules let you swap real estate with a family member or a business you control, but they add a two-year holding requirement on both sides, a broad anti-abuse rule, and extra reporting for two years after the exchange. Break any of those, and the gain you deferred becomes taxable, usually with interest and often with a penalty. Since 2018, only real property qualifies for a 1031 exchange at all, so these rules apply to land, buildings, and similar interests.1Federal Register. Statutory Limitations on Like-Kind Exchanges
Who Counts as a Related Party
Section 1031 borrows its definition of “related person” from two other parts of the tax code: Section 267(b) and Section 707(b)(1).2Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment The relationships that matter fall into two buckets.
Family
The statutory family list is your spouse, siblings (including half-siblings), parents, grandparents, children, and grandchildren. Legal adoptions count the same as biological ties.3Office of the Law Revision Counsel. 26 USC 267 – Losses, Expenses, and Interest With Respect to Transactions Between Related Taxpayers That list is exhaustive, and the omissions matter as much as the inclusions. In-laws, cousins, aunts, uncles, nieces, nephews, and step-siblings who don’t share a biological parent are not related parties. An exchange with your cousin or your father-in-law is a normal arm’s-length 1031.
Entities You Control
Related-party status also kicks in whenever you and an entity share more than 50% common ownership. A corporation is related to you if you own more than 50% of its stock value. A partnership is related if you hold more than 50% of its capital or profits interest. Two corporations, or two S corporations, are related to each other when the same person owns more than 50% of each.3Office of the Law Revision Counsel. 26 USC 267 – Losses, Expenses, and Interest With Respect to Transactions Between Related Taxpayers The grantor and beneficiaries of the same trust are related, and so are two trusts with the same grantor.
Ownership held through an entity can be attributed back to you, and ownership held by family members can be attributed to each other. Stock owned by a corporation, partnership, estate, or trust is treated as proportionally owned by the shareholders, partners, or beneficiaries. If your LLC owns 60% of a corporation, you’re treated as owning that 60%, and that constructive ownership can chain further.4eCFR. 26 CFR 1.267(c)-1 – Constructive Ownership of Stock Family attribution runs only one level deep. Map the ownership on paper before assuming a deal falls outside the rules.
The Two-Year Holding Requirement
Once you complete a like-kind exchange with a related party, both of you must hold the property you received for at least two years. The clock starts on the date of the last transfer that was part of the exchange. If either party sells, re-exchanges, gifts, or otherwise disposes of the property before that two-year mark, the deferral is destroyed.2Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment
The gain doesn’t get pushed back to the year of the original exchange. You report the previously deferred gain in the tax year the early disposition occurs. That means your tax bill depends partly on what the related party does, which is a risk you can’t fully control. A sibling who sells 18 months in can trigger a tax event on your return, even if you had no plans to sell. Before entering a related-party exchange, both sides need to genuinely commit to holding for two full years.
Structures the IRS Will Unwind Anyway
Clearing the two-year rule isn’t enough on its own. Section 1031(f)(4) disqualifies any exchange that is part of a transaction, or series of transactions, structured to avoid the purposes of the related-party rules.2Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment
The classic target is basis shifting. Suppose you own a low-basis property and your sibling owns a high-basis one. You swap. Your sibling keeps the low-basis property. You hold the high-basis property for two years and then sell it with little taxable gain. On paper, both parties held for two years. In substance, a large built-in gain has quietly disappeared from the family. The IRS can treat the whole arrangement as never having qualified for deferral.5Internal Revenue Service. Revenue Ruling 2002-83
Routing a related-party deal through a Qualified Intermediary doesn’t rescue it either. Revenue Ruling 2002-83 addresses this directly: if you transfer your relinquished property to an intermediary and receive replacement property that formerly belonged to a related party, and that related party ends up with cash or other non-like-kind property, the exchange fails.5Internal Revenue Service. Revenue Ruling 2002-83 The IRS instructions for Form 8824 are equally blunt: a transaction structured to avoid the related-party rules isn’t a like-kind exchange at all. You report it as a straight sale.6Internal Revenue Service. Instructions for Form 8824
There is a structure that can work. If the related party also completes their own 1031 exchange into replacement property from an unrelated seller, so that nobody on the related side actually cashes out of real estate, the arrangement has a better chance of surviving scrutiny. Every party in the chain still has to hold their replacement property for the full two years, and the final seller must be unrelated. The question the IRS asks is whether any related party liquidated their real estate investment. If none did, the structure is more defensible.
When an Early Disposition Is Excused
Section 1031(f)(2) provides three exceptions that excuse a sale inside the two-year window without unwinding the deferral.2Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment
- Death of either party. If you or the related party dies before the two years are up, the holding requirement is waived, and the disposition that follows through the estate doesn’t retroactively spoil the exchange.
- Involuntary conversion. A taking through eminent domain, or a loss to a disaster, is excused, provided the exchange happened before any threat of the conversion existed.
- No tax-avoidance purpose. If you can show that neither the original exchange nor the early disposition had tax avoidance as a principal purpose, the deferral survives.
The third exception is the one that comes up most in practice, and it’s the hardest to prove. Showing that the transactions produced no meaningful tax benefit for the group as a whole is a strong starting point. Beyond that, you need real evidence of a legitimate business or personal reason for the early sale: a financial emergency, a business relocation, a zoning change that made the investment impractical. The IRS looks at the totality of circumstances, so contemporaneous records of your decision-making matter far more than after-the-fact explanations.
What a Disqualified Exchange Costs
When a related-party exchange loses its deferred status, the full capital gain you originally deferred becomes taxable. For most investment real estate held longer than a year, that gain is taxed at long-term capital gains rates of 15% or 20% depending on income. Any gain attributable to depreciation you claimed is recaptured at up to 25%.
The capital gains tax often isn’t the end of it. If your modified adjusted gross income exceeds $200,000 filing single or $250,000 filing jointly, the recognized gain can also trigger the 3.8% net investment income tax.7Internal Revenue Service. Net Investment Income Tax On a large commercial property, that layer adds up quickly.
Because the gain is recognized in the year of the disqualifying disposition rather than the year of the original exchange, you almost certainly didn’t make estimated tax payments to cover it. The IRS charges interest on the resulting underpayment, running 6% to 7% annually as of early 2026 and compounded daily.8Internal Revenue Service. Internal Revenue Bulletin 2026-8 If the unreported gain amounts to a substantial understatement of income tax, an accuracy-related penalty of 20% of the underpayment applies as well.9Office of the Law Revision Counsel. 26 US Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments Between the tax, the surtax, interest, and penalties, a disqualified exchange on a property with a large built-in gain can easily cost tens of thousands more than a straightforward sale would have.
Reporting on Form 8824 for Two More Years
Every like-kind exchange is reported on IRS Form 8824 in the year the exchange occurs. Related-party exchanges also require you to file Form 8824 in each of the following two years.6Internal Revenue Service. Instructions for Form 8824 Part II of the form is dedicated to related-party exchanges and asks whether either party disposed of the property during the year. If nobody disposed of anything, you complete Parts I and II and stop. If someone did dispose, and no statutory exception covers it, you complete Part III and report the deferred gain as taxable income for that year.10Internal Revenue Service. Form 8824 – Like-Kind Exchanges
Skipping these follow-up filings is a common mistake, especially when tax preparers change between years. The IRS uses the annual filings to monitor the holding period. Missing them doesn’t extend any deadline or create any presumption in your favor. It just means the agency finds out about a problem during an audit rather than on a form.