Reverse and Improvement Exchanges — and the Related-Party Trap

The standard 1031 assumes you sell first and buy second. Two variants handle the cases where that sequence does not work, and one statutory rule kills exchanges that look too convenient.

Reverse exchange

You found the replacement property before you could sell the relinquished one — common in a tight market, where a seller will not wait 45 days for your buyer. An exchange accommodation titleholder (EAT), typically an affiliate of your qualified intermediary, takes title to the replacement property and parks it while you sell. The safe harbor is Rev. Proc. 2000-37, and its clock is unforgiving: the EAT may hold the parked property for no more than 180 days, and the 45-day identification requirement still applies to the relinquished property. You will also fund the purchase yourself, since the EAT has no money — so a reverse exchange demands either cash or a lender willing to lend to a parking entity. Expect fees several times a forward exchange.

Improvement (build-to-suit) exchange

The replacement property is worth less than what you sold, and you intend to spend the difference on construction. Buying it directly means the shortfall is taxable boot; you cannot exchange into improvements you make to property you already own. The fix is the same parking structure: the EAT takes title, the improvements are built while the EAT holds it, and you receive the improved property before the 180 days expire. Only improvements actually completed inside the window count — money sitting in a construction escrow on day 181 is boot, not basis. Underwrite the contractor’s schedule as a tax deadline, because that is what it is.

The related-party rule

IRC §1031(f) unwinds the deferral if you exchange with a related party and either side disposes of its property within two years — the gain snaps back into the year of the disposition. §1031(f)(4) goes further and disallows any exchange structured as part of a transaction whose principal purpose was avoiding §1031(f). The classic failure is exchanging into a property owned by your own LLC or a family partnership, or having a related party buy your relinquished property from the intermediary. Buying from an unrelated party while a related party is nowhere in the chain is the safe posture; anything else needs an opinion before it needs a closing date.