It is a natural instinct. You are doing a 1031 exchange, your brother owns exactly the kind of building you want, and it would be tidy to just trade within the family. Or you want to move a property between two LLCs you control. On paper it looks efficient. In practice, exchanging with a related party is one of the most heavily policed corners of Section 1031, and the rules can retroactively undo a deferral you thought was locked in years earlier.
You are allowed to do it. You just have to understand exactly what you are signing up for.
Who counts as a "related party"
The tax code draws this line specifically. Related parties include your spouse, siblings, ancestors, and lineal descendants, along with any entity in which you hold more than 50% ownership. Notably, some relationships you might assume are covered are not, in-laws, cousins, aunts, and uncles generally fall outside the definition. But if the person or entity on the other side of your exchange is inside that circle, a special set of rules switches on.
The two-year holding rule
Here is the core restriction. When you complete a like-kind exchange with a related party, both of you must hold the properties you received for at least two years. If either party disposes of their property within that two-year window, the original exchange is disqualified, and the gain you deferred comes roaring back as taxable, often in a year you were not expecting it.
Two years is a long time to keep two separate parties disciplined, and this is exactly where these deals fall apart. One side gets an unsolicited offer, sells eighteen months in, and unknowingly triggers tax for the other. The clock is unforgiving, and it binds both of you.
Why the rule exists: the basis-shifting trap
The two-year rule is not arbitrary. It exists to stop a specific abuse called basis shifting. Imagine you own a low-basis property with a big built-in gain, and a related party owns a high-basis property. By swapping and then quickly cashing out, families could shuffle the tax basis around to minimize or erase the tax on a sale. Congress saw the maneuver and built the holding period to block it.
This is why the riskiest version of a related-party exchange is buying your replacement property from a related party. That is the fact pattern most associated with basis shifting, and the IRS scrutinizes it hardest. Even a full two-year hold may not save an exchange if the net effect looks like basis shifting for tax avoidance. If the building you want to buy is owned by your brother or your own entity, proceed with real caution and real advice.
The arrangement the IRS reliably respects
There is good news buried in all this. The IRS has been clear that one common structure generally works: selling your relinquished property to a related buyer through an unrelated Qualified Intermediary, while acquiring your replacement property from an unrelated seller. Because you are buying from a stranger at arm's length, there is no basis shifting, and the exchange is typically respected even if your related buyer later disposes of the property within two years. The direction of the transaction matters enormously: selling to family while buying from a stranger is far safer than buying from family.
The exceptions to the two-year rule
The holding period is not absolute. It does not apply if the early disposition happens because of the death of either party, an involuntary conversion (such as a property lost to condemnation or disaster), or a transaction that clearly lacks any tax-avoidance purpose. These are narrow escape hatches, and leaning on the last one is risky without strong facts, but they exist for genuinely unavoidable situations.
The bottom line
Related-party exchanges are legal, sometimes sensible, and never something to improvise. Hold for the full two years, be especially careful about buying from family or entities you control, prefer structures that route through an unrelated intermediary and an unrelated seller, and document that your purpose is not tax avoidance. This is genuinely a place to have a tax attorney and your CPA at the table before anything moves, because the cost of getting it wrong is the retroactive loss of your entire deferral. Our exchange process builds these questions in from the start, precisely so a family-friendly plan does not become an expensive surprise.
Frequently asked questions about related-party 1031 exchanges
Can I do a 1031 exchange with a family member?
Yes, but special rules apply. Both parties generally must hold their properties for at least two years, and exchanges where you buy from a related party face heavy scrutiny for basis shifting.
Who is considered a related party in a 1031 exchange?
Spouses, siblings, ancestors, and lineal descendants, plus entities in which you own more than 50%. In-laws, cousins, aunts, and uncles are generally not related parties for this purpose.
What is the two-year holding rule?
In a related-party exchange, both parties must hold the property received for at least two years. If either disposes of it sooner, the original exchange is disqualified and the deferred gain becomes taxable.
Is it riskier to buy from or sell to a related party?
Buying your replacement from a related party is the riskier direction, because it is the classic basis-shifting pattern. Selling to a related party through an unrelated intermediary while buying from an unrelated seller is generally respected.
Are there exceptions to the two-year rule?
Yes. The rule does not apply if the early disposition results from the death of a party, an involuntary conversion, or a transaction with no tax-avoidance purpose. These exceptions are narrow and fact-dependent.