A client sold a retail building on March 1 and a small industrial property on April 12. He described it to us as "my exchange," singular, and assumed the deadlines ran from the second sale because that was when he finished selling.
They did not. The structure he had, as it happened, was two exchanges. Had it been one, his deadlines would have been earlier than he thought rather than later.
The rule that decides it
Where several relinquished properties form part of the same exchange, the identification and closing periods run from the earliest transfer. The clock does not restart with each sale, and it does not wait for the last one.
So a single exchange containing both of those sales would have run its 45 days from March 1, not April 12. By the time the second building closed, more than half the identification window was already gone.
Run them as two separate exchanges and each has its own dates, its own intermediary agreement, its own account, and its own reporting.
| One combined exchange | Two separate exchanges | |
|---|---|---|
| Deadlines | From the earliest closing | Each sale has its own |
| Intermediary agreements | One | One per exchange |
| Funds | A single pool | Held separately |
| Identification | One list covering the whole exchange | A list for each |
| Form 8824 | One | One per exchange |
| Cost | Lower | Higher, one fee each |
Which to choose
Combining is simpler and cheaper, and it suits sales that close close together into a single replacement purchase. The cost is that the earliest sale sets the pace for everything.
Separating costs more in fees and administration, and it buys you independent timelines. Where sales are weeks or months apart, that is usually worth more than the fee.
What you cannot do is decide afterwards. The structure is set by the exchange agreements signed before the first closing, which is the practical point of this entire article: the decision is made at a moment when most people have not yet thought of it as a decision.
The errors we see
- Assuming the clock restarts. It does not, and an owner who identifies on what they believe is day 30 may actually be past the deadline.
- One identification notice covering both. If they are separate exchanges, each needs its own written identification, and a notice that does not make clear which exchange it belongs to is an argument waiting to happen. The mechanics are in identification rules.
- Pooled funds. Proceeds from two exchanges in one account make the accounting ambiguous, and ambiguity is the last thing you want near constructive receipt.
- Netting boot across exchanges. Boot is computed per exchange. A shortfall on one is not cured by a surplus on the other, and the netting rules operate within a single exchange.
If a second sale is even possible, say so early
The useful habit is simply to tell the intermediary about everything you might sell, not only what is under contract. A sale that is merely likely still changes how the first one should be structured, and structure is cheap to get right in advance and impossible to change later.
That conversation belongs before the first closing, which is where our exchange process puts it. Your CPA and intermediary determine the right structure for your specific sales.
Common questions about multiple exchanges
If I sell two properties, is that one exchange or two?
It depends how it is structured before the first closing. Both are possible, and the choice drives your deadlines, agreements and reporting.
When does the clock start if both are in one exchange?
From the earliest transfer. It does not restart with the later sale and does not wait for it.
Can I decide after the first sale closes?
No. The structure is fixed by the exchange agreements signed before that closing.
Do I file one Form 8824 or two?
One per exchange. Two separate exchanges mean two forms.
Can boot on one exchange be offset by the other?
No. Boot is computed within a single exchange, so a surplus on one does not cure a shortfall on the other.
Disclosure: Numerical example is for illustration purposes only; individual circumstances will vary.