The 1031 exchange related party rules, set out in Internal Revenue Code Section 1031(f), let you swap investment real estate with a family member or an entity you control, but they impose two conditions that don’t apply to arm’s-length deals: both sides must hold their new properties for at least two years, and the transaction cannot be structured so that the related party effectively cashes out. Break either condition and the IRS pulls the deferral, taxing the gain in the year the rule was broken. The rules exist because people with shared financial interests can engineer swaps that shift low tax basis onto property one side plans to sell, and Congress wrote Section 1031(f) specifically to stop that.
Who Counts as a Related Party
Section 1031(f)(3) defines a related person by cross-reference to Sections 267(b) and 707(b)(1). The list is broader than most people expect, and it splits into family relationships and entity relationships.
On the family side, the definition covers your spouse, siblings (including half-siblings), parents, grandparents, children, and grandchildren. Aunts, uncles, cousins, and in-laws are not on the list. A swap with your cousin is an ordinary arm’s-length exchange; a swap with your adult child is not.
On the entity side, the threshold is more than 50% ownership. You are related to a corporation if you own more than 50% of its stock, and related to a partnership if you own more than 50% of its capital or profits interest. Two corporations are related where the same people own more than 50% of each. The statute also reaches trust relationships, including a grantor and a fiduciary, a fiduciary and a beneficiary, and fiduciaries of two trusts sharing the same grantor. Section 267(b) contains thirteen categories in total.
Constructive Ownership Can Push You Over the Line
You do not have to hold stock directly to count as an owner. Under Section 267(c), ownership is attributed to you from family members and from entities where you are a shareholder, partner, or beneficiary. If your spouse owns 30% of a corporation and you own 25%, the IRS treats you as owning 55%, which crosses the threshold. Stock held by a corporation, partnership, estate, or trust is treated as owned proportionally by the people behind it.
There is one limit: ownership attributed to you through family or partner rules cannot then be re-attributed to someone else through those same rules. Even so, the initial attribution catches enough people that anyone planning an exchange with an entity they or their family touch should map out the ownership before signing anything.
The Two-Year Holding Requirement
Under Section 1031(f)(1), if you exchange property with a related party and either side disposes of what they received within two years of the last transfer in the exchange, the deferral is revoked. Both parties are on the hook for the full two years. It doesn’t matter whether the disposition is a sale, a gift, or something else.
The gain does not get reported in the year of the original exchange. It gets recognized in the year the early disposition happens. If you swapped in 2024 and your related party sells in 2025, the gain you deferred becomes taxable on your 2025 return. Depending on your income, that means long-term capital gains rates of 0% to 20%, a possible 25% rate on depreciation recapture for real property, and the 3.8% net investment income tax if your modified adjusted gross income exceeds $200,000 single or $250,000 married filing jointly.
The two-year clock starts on the date of the last transfer that was part of the exchange, not the first. In a deferred exchange that takes several months to complete, the clock begins when the replacement property is actually delivered.
Using a Qualified Intermediary Does Not Get Around These Rules
This is where most related party exchanges collapse. A common plan looks structured enough to work: instead of swapping directly with your relative, you sell your property to an unrelated buyer through a qualified intermediary, and the intermediary uses the proceeds to buy replacement property from your related party. The related party walks away with cash, you walk away with a new property, and no direct exchange between related parties appears on paper.
The IRS shut this down in Revenue Ruling 2002-83. The ruling holds that when a taxpayer uses a qualified intermediary to acquire replacement property from a related party, and the related party receives cash as part of the transaction, the exchange does not qualify for deferral. The authority is Section 1031(f)(4), which denies nonrecognition to any exchange that is “part of a transaction (or series of transactions) structured to avoid the purposes of” the related party rules.
The practical result: if your related party ends up with cash or other non-like-kind property anywhere in the chain, the IRS treats the whole arrangement as a taxable sale. The number of intermediaries between you and your relative is irrelevant. What the IRS looks at is whether the related-party group, as a group, cashed out on a tax-deferred basis.
Exceptions to the Two-Year Rule
Section 1031(f)(2) carves out three situations where an early disposition will not kill the deferral. They are narrow.
- Death. If either you or the related party dies before the two-year period ends, a later disposition of the exchanged property does not trigger gain recognition.
- Involuntary conversion. If the property is destroyed by a natural disaster, condemned through eminent domain, or otherwise taken through compulsory conversion, the disposition is excused. The exchange itself must have happened before the threat of conversion existed.
- No tax avoidance purpose. If you can show the IRS that neither the exchange nor the disposition had federal income tax avoidance as a principal purpose, the two-year rule does not apply.
The third exception sounds flexible and is not. In Chief Counsel Advice 201013038, the IRS rejected business justifications like geographic convenience, established supplier relationships, and manufacturer incentives because the transaction still produced a related-party cash-out with basis shifting. The IRS identified three categories Congress meant this exception to cover: exchanges of undivided interests that consolidate ownership, dispositions in other nonrecognition transactions, and deals that involve no basis shifting at all. Anything outside those categories draws heavy skepticism.
What Happens When the Rules Are Broken
The deferred gain becomes taxable in the year of the disqualifying disposition. You do not amend the original return; the gain lands on your current-year return at whatever capital gains rate applies.
On top of the tax itself, the IRS can impose an accuracy-related penalty of 20% on any underpayment resulting from a failed 1031 exchange if the return contained a substantial understatement of income or was filed negligently. On a large exchange, that penalty alone can dwarf the cost of simply holding the property for the required two years.
The audit risk stretches out. You are required to file Form 8824 in each of the two years following a related party exchange, and the IRS uses those filings to track whether the properties are still held. A missed filing or incomplete information is exactly what draws attention. The IRS has identified related party 1031 exchanges as a compliance concern, and the reporting requirements exist to give the agency a paper trail.
Reporting on Form 8824 for Three Years
Every 1031 exchange goes on Form 8824, filed with your federal return for the year the exchange began. Related party exchanges pick up extra requirements in Part II of the form.
Line 8 asks for the related party’s name, address, taxpayer identification number, and their relationship to you. Lines 9 and 10 ask whether either party disposed of the property they received during the current tax year and before the two-year period expired. A “yes” on either line sends you to Line 11, which asks whether any of the three statutory exceptions apply.
You must file Form 8824 in three consecutive tax years: the exchange year and each of the two years after. The second and third filings require you to complete Parts I and II again to confirm both properties are still held. Skipping either follow-up filing is one of the easiest ways to invite IRS review.
What to Have Ready Before Filing
- Related party identification. Full legal name, mailing address, Social Security number or Employer Identification Number, and the specific relationship (sibling, controlled corporation, trust beneficiary, and so on).
- Property descriptions. Address and character of both the relinquished and replacement properties.
- Transfer dates. The exact date you transferred the relinquished property and the exact date you received the replacement property. These fix when the two-year clock started.
- Values and liabilities. Fair market value of both properties at the time of exchange, plus any mortgages or other liabilities assumed or relieved.
Watch Out for Boot
If you receive cash or non-like-kind property as part of an otherwise valid exchange, that portion, called boot, is taxable in the year of the exchange. You can still defer gain on the like-kind portion, but any cash you take out, or any net debt relief, triggers immediate recognition up to the amount of the boot received. In a related party exchange, boot is especially dangerous because cash flowing to the related party is exactly the pattern Revenue Ruling 2002-83 attacks. If the numbers only work with cash moving to your relative, the transaction is unlikely to survive review.