Can You 1031 Exchange a Vacation Home or Airbnb?

The case that set the line: Moore v. Commissioner

In Moore v. Commissioner (T.C. Memo 2007-134), a couple exchanged one lake house for another and claimed §1031. They had never rented either property, used both for family recreation, and argued they held them for investment because they expected appreciation. The Tax Court said hoping for appreciation while using a home personally is not holding it for investment. The exchange was disallowed in full.

The IRS followed the next year with Rev. Proc. 2008-16 to tell taxpayers exactly how much personal use is tolerable.

The Rev. Proc. 2008-16 safe harbor

The IRS will not challenge whether a dwelling unit is held for investment if, for the relinquished property:

• You owned it for at least 24 months immediately before the exchange, and
• In each of the two 12-month periods before the exchange, you rented it at fair market rent for 14 days or more, and
• Your personal use in each of those periods did not exceed the greater of 14 days or 10% of the days it was rented at fair rent.

The replacement property must meet the mirror-image test for the 24 months after the exchange. Miss the safe harbor and you're not automatically disqualified, but you're arguing facts and circumstances with the IRS, and Moore shows how that goes.

What counts as personal use

Personal use includes days used by you, your spouse, siblings, parents, children, grandchildren, and anyone who pays less than fair market rent. A week you gave your brother-in-law for free counts. A week rented to a stranger at market rate through Airbnb doesn't. Days spent primarily on repairs and maintenance are excluded from personal use under §280A(d)(2), so a long weekend replacing the dock is fine as long as the work was the point of the trip. Keep a calendar. In an audit, the calendar is the case.

Short-term rentals and Airbnb

A property rented nightly at market rates qualifies as investment property on the same terms as a long-term rental. If your STR does 120 rental nights a year, you can use it personally up to 14 days (10% of 120 would be 12, so 14 wins) and stay inside the safe harbor. Heavy-STR properties with 200+ rental nights get up to 20 or more personal days. The real risk with STRs isn't the 1031 test; it's owners who block off July for family and rent the shoulder season, which can invert the ratio.

One related point: if you materially participate in an STR with average stays of seven days or less, it may not be a passive activity for §469 purposes. That affects your losses, not your ability to exchange.

Converting a personal vacation home before you sell

The safe harbor is forward-looking, so the plan is simple: stop using the house as a second home, rent it at fair market value for two full years, keep personal use under the limits, and then exchange. Two years is the price of admission. Investors sometimes try one rental season and a sale; that's outside the safe harbor and is the fact pattern the IRS has already litigated.

The same logic runs the other direction. Exchange into a mountain house, rent it properly for 24 months, and you can then convert it to personal use. If you eventually want the §121 exclusion on it, you must own it five years after the exchange first (§121(d)(10)); the mechanics are in moving into a rental to avoid capital gains.

Mixed-use: part rental, part personal

A duplex where you live in one unit and rent the other, or a home with a rented guest house, can be split: the rental portion qualifies for §1031 and the residence portion for §121, on the same sale, under Rev. Proc. 2005-14. That's a different question from a single-unit vacation home, where the property is either investment or it isn't.