The 45-day identification period starts on the day the relinquished property closes, not the day the exchange paperwork is signed or the day a buyer is found for the next deal. From that closing date, an exchanger has 45 calendar days, weekends and holidays included, to deliver a written list of candidate replacement properties to the qualified intermediary. Miss that window and the exchange fails outright, regardless of how close a replacement purchase might be to closing.
In North Carolina, where a relinquished property might sell in Charlotte while the exchanger is shopping replacement candidates across Raleigh, the Triad, or the mountains near Asheville, 45 days is often the tightest constraint in the entire transaction, tighter than financing and tighter than the 180-day closing deadline that follows it.
What counts as a valid identification
A valid identification has to describe the replacement property unambiguously, generally with a legal description, an address, or a distinguishable name for a distinct parcel. A vague reference to a type of property or a general market area does not satisfy the requirement. The list has to be signed by the exchanger and delivered to a party involved in the exchange who is not a disqualified person, most commonly the qualified intermediary, before midnight on day 45.
Identification does not require certainty. A property can be listed even if it is under contract with another buyer, and it can later fall through without penalty as long as the exchanger identified it correctly and, if needed, has other candidates on the same list.
The three-property rule
The most commonly used identification rule allows an exchanger to list up to three replacement properties of any value, with no cap on combined fair market value. Most single-property exchangers use this rule by default because it is the simplest to apply: list a primary candidate and one or two backups in case financing or due diligence knocks the lead property out.
The 200% rule and the 95% rule
An exchanger who wants to identify more than three properties can do so under the 200% rule, which allows any number of candidates as long as their combined fair market value does not exceed twice the value of the relinquished property. This is common when an exchanger is spreading proceeds across several smaller assets, such as multiple retail pads instead of one larger building.
The 95% rule removes the value cap entirely but comes with a strict trade-off: the exchanger must actually acquire at least 95% of the total value of everything identified. Because that requirement is unforgiving, the 95% rule is usually reserved for exchangers who are confident they will close on nearly every property listed, not as a way to keep options open.
Why a list needs a plan behind it
A property only belongs on the identification list if there is a realistic path to closing it inside the exchange timeline. That means a lender has confirmed the asset is financeable, a seller has shown willingness to work with an exchange closing, and the exchanger has looked past the listing price to actual due diligence risk. A list built in the last two days of the identification window, without any of that groundwork, tends to produce properties that look good on day 44 and fall apart in escrow.
Common 1031 Exchange Questions
Does the 45-day clock start at contract or at closing?
It starts at the closing of the relinquished property, when title actually transfers, not when the sale contract is signed. That date is the anchor for both the 45-day and the 180-day deadlines.
Can you change your identification list after submitting it?
A new list can revoke and replace an earlier one, but only if the revocation and the new identification both arrive before the 45-day deadline. Once day 45 passes, the list is locked.
Can you combine the three-property rule and the 200% rule?
No. An exchanger picks one identification rule for a given exchange. Listing a fourth property while relying on the three-property rule invalidates that fourth property, and potentially the identification of the earlier three if the list is unclear about which rule applies.
What happens if none of the identified properties close?
The exchange fails and the transaction is treated as a taxable sale. This is why exchangers who use the three-property rule typically list at least one realistic backup rather than a single candidate.
Who does the identification notice need to go to?
It has to reach a party to the exchange who is not the exchanger's agent within the prior two years, most commonly the qualified intermediary. A list kept in a personal file or emailed only to a real estate agent does not satisfy the requirement.
