Why It Matters
Here's why this matters: if you sell your relinquished property to a related party — or buy your replacement property from one — the IRS requires both of you to hold the property for at least two full years. If either party sells within that window, your deferred gain comes back immediately, with interest. You can still do a related-party exchange legally; you just can't walk away early. Most investors run into trouble not by planning a related-party deal but by stumbling into one — selling to their own LLC, their spouse, or a sibling without realizing those count.
At a Glance
- What it is: A 1031 exchange where the buyer or seller is a family member, controlled entity, or other related party under IRC §267(b) or §707(b)
- The rule: Both parties must hold the exchanged properties for 2 full years after the exchange closes
- Who counts as related: Spouse, siblings, parents, children, grandparents, grandchildren; corporations or partnerships where you own more than 50%
- What disqualifies it: Either party selling, gifting, or disposing of their property within the 2-year holding period — retroactively blows up the original exchange
- Exceptions: Death of either party, involuntary conversion (condemnation or casualty), or an IRS ruling that tax avoidance wasn't the main purpose
How It Works
The problem Congress was solving. Without §1031(f), two related parties could swap properties and use the exchange to effectively cash out a gain without paying tax — one side defers, the other immediately sells and returns the cash. Congress closed this loophole in 1989 by requiring a two-year lockup whenever a related party is involved.
Who the IRS considers a related party. The statute points to two code sections. Under IRC §267(b), related parties include your spouse, siblings (including half-siblings), parents, grandparents, children, and grandchildren — but NOT aunts, uncles, cousins, or in-laws. Under IRC §707(b), any corporation where you own more than 50% of the stock qualifies, as does any partnership where you own more than 50% of the capital or profits interest. Your own single-member LLC — which you own 100% — is a related party.
How the two-year rule works in practice. The clock starts on the date the last transfer completes — generally when you acquire your replacement property through a qualified intermediary. Both you and the related party must hold your respective properties without selling, gifting, or otherwise disposing of them for two full years. The IRS gives you three narrow exceptions: death of either party, involuntary conversion such as condemnation, or a determination that tax avoidance was not a principal purpose. That last one is rarely granted.
Real-World Example
Diane owns a rental duplex in Austin with an adjusted basis of $89,000 and a current market value of $347,000 — $258,000 of embedded gain she wants to defer. Her daughter Maya is looking to buy her first rental, so Diane sets up a 1031 exchange through a qualified intermediary and sells the duplex to Maya for $347,000. She identifies a small commercial strip in San Antonio as replacement property and closes within the 180-day exchange period.
The exchange is valid — but the two-year clock starts the day Diane closes on San Antonio. If Maya sells the Austin duplex eleven months later for any reason, Diane's deferred $258,000 gain comes back immediately, with interest accruing from the original exchange date. To protect herself, Diane documents the business purpose, marks the two-year anniversary, and adds a written-consent clause to their sales agreement so Maya can't sell without Diane knowing first.
Pros & Cons
- Allows you to legitimately transfer appreciated property to a family member while deferring capital gains tax
- Gives controlled-entity planning options — a partnership you co-own with a business partner can still work if you own 50% or less
- The two-year holding requirement aligns with genuine long-term investment intent, which many family deals already satisfy
- Exceptions for death and involuntary conversion provide a safety net in circumstances outside your control
- Getting structure right upfront with a 1031 exchange advisor is far cheaper than retroactive disqualification
- The two-year lockup removes flexibility — if either party sells for any reason, it can blow up the original exchange and generate a surprise tax bill
- Your own LLC is a related party, which surprises many investors who assume a disregarded entity creates separation
- The "no tax avoidance" exception is effectively unavailable in practice — courts apply it narrowly, so don't count on it as a fallback
- Even a partial disposition within two years — such as a refinance the IRS characterizes as a sale — can trigger disqualification
- Tracking the two-year anniversary for both parties requires ongoing coordination between the investor and the related party
Watch Out
- Your LLC is a related party. A single-member LLC is disregarded for income tax purposes, which means you own it 100% and it qualifies as a related party under §707(b). Selling your relinquished property to your own LLC doesn't create separation — it triggers the two-year rule just like selling to a sibling.
- The 2-year clock runs from the last transfer, not the first. Many investors miscalculate the holding period by starting the clock at the sale of the relinquished property. The two years begin when you close on your replacement property — which can be up to 180 days after the first sale under the exchange period rules.
- Boot from a related-party exchange is still taxable. If you receive boot — cash or non-like-kind property — as part of a related-party exchange, you owe tax on that amount immediately, even if the exchange is otherwise structured correctly. The related-party rules don't reduce your boot exposure; they add to it.
- Non-like-kind property counts as a disposition. If the related party converts the property to personal use or contributes it to a new entity within the two-year window, the IRS may treat it as a disposition and retroactively disqualify your exchange. Make sure the related party understands the restrictions before the deal closes.
Ask an Investor
The Takeaway
Related-party exchanges are legal and sometimes exactly the right tool — but they come with a two-year commitment from both sides and almost zero margin for error. If you're considering selling to a family member or a controlled entity, work with a 1031 exchange advisor before you sign anything. Know who counts as a related party, document the business purpose of the deal, and build the two-year holding requirement into your planning from day one. The tax deferral is real, and so is the disqualification risk if either party exits too soon.