Related-Party 1031 Exchange Rules

Exchanging property with a family member, business partner, or an entity you control is allowed, but Section 1031(f) adds a restriction most sellers don't encounter until they're already planning one: both parties generally have to hold their respective properties for at least two years after the exchange, or the deferral can be retroactively disqualified. This rule exists specifically to stop related parties from using an exchange to shift basis or quickly cash out a low-basis property without paying tax, and it catches New York families more often than a stranger-to-stranger transaction would.

The related-party definition is broader than most people expect. It includes family members such as siblings, spouses, ancestors, and descendants, along with entities where you own more than fifty percent, corporations, partnerships, and certain trusts among them. A New York investor exchanging property with a sibling who co-owns a family-held LLC, or with a parent's trust, falls squarely within this definition, even if the transaction otherwise looks like an arm's length deal negotiated at fair market value.

In-laws and cousins generally fall outside the narrower family definition used for this rule, but entity ownership can still pull them in indirectly if they hold a large enough stake in a corporation or partnership on the other side of the transaction, which is a distinction worth confirming rather than assuming based on the family relationship alone.

If you exchange property with a related party, both you and the related party generally need to hold your respective properties for at least two years following the exchange. If either side disposes of their property before that two-year period runs, the original exchange can be disqualified retroactively, turning what looked like a completed deferral back into a taxable event in the year of the original transaction. This retroactive exposure is what makes related-party exchanges risky when either side has any reason to expect they might need to sell again soon, whether for liquidity, a change in circumstances, or an unrelated business need.

One pattern the IRS has specifically challenged involves a related party selling their low-basis property to a qualified intermediary, who then sells it to an unrelated buyer, while the original owner receives a high-basis property from the related party in what looks like a direct exchange. Structured this way, the related party effectively converts their property to cash while the taxpayer ends up holding stepped-up basis property, all without either side technically violating the letter of the two-year rule as originally understood. Courts and the IRS have closed much of this loophole, and exchanges that look like an attempt to route around the related-party restriction through an intermediary invite scrutiny even when structured carefully.

Multi-generational property holdings are common across the boroughs and Long Island, where a family may hold several rental buildings across siblings, parents, and family entities, and a related-party exchange can look like the simplest way to consolidate or divide those holdings. Because the two-year holding requirement and the related-party definition apply regardless of how reasonable the family's motivation is, any exchange involving related parties needs advance review from a tax advisor familiar with these specific rules before the relinquished property closes, not after the family has already agreed informally on how the properties will move.

A family considering dividing an inherited multifamily portfolio between siblings, for example, should map out the related-party exposure on paper before any property changes hands, since an informal handshake agreement reached at a holiday gathering carries the same tax consequences as a formally negotiated deal once the properties actually transfer.