The 45-day identification period is the first hard deadline in a delayed 1031 exchange, and it starts counting the moment the relinquished property closes, not when an investor decides they are ready to start looking. For a Milwaukee owner selling a building near the harbor district or along the I-94 corridor toward Waukesha County, that clock runs through weekends, holidays, and any slow week of showings with no built-in extension. Understanding what the rule actually requires, rather than what it feels like it should allow, is what keeps an exchange alive past day 45.
How the Three-Property Rule Works
Most exchanges use the default three-property rule, which allows an investor to name up to three replacement candidates on the written identification without regard to their combined value. A Milwaukee investor selling one industrial building could identify a Wauwatosa flex property, a Third Ward mixed-use building, and a Waukesha warehouse on the same list, and every one of those three remains eligible for purchase regardless of price. The rule does not require ranking the candidates or explaining why each was chosen; it simply caps the count at three unless a different rule is invoked instead.
The 200 Percent Rule As An Alternative
When an investor wants to name more than three properties, the 200 percent rule allows it, provided the combined fair market value of everything identified does not exceed twice the value of the relinquished property. This matters for an investor comparing several smaller multifamily buildings scattered across the south side and Waukesha County rather than chasing one large replacement, since a longer list of modest-value candidates can stay under the 200 percent ceiling even though it exceeds three names. The tradeoff is that every additional candidate still needs enough underlying diligence to be a real option, not just a placeholder added to preserve flexibility.
The 95 Percent Rule and Its Narrow Use
The 95 percent rule permits identifying an unlimited number of properties with no value cap, but it comes with a strict condition: the investor must actually close on at least 95 percent of the total value identified. In practice this rule is rarely useful, because failing to close that threshold disqualifies the entire exchange rather than just the shortfall. It surfaces occasionally when an investor is genuinely uncertain which of several Milwaukee-area buildings will survive due diligence and wants every option preserved, but most advisors steer clients back toward the three-property or 200 percent rule once the risk is explained.
What Counts As A Valid Written Identification
A valid identification has to unambiguously describe each candidate property, which in practice means a legal description or a specific street address, not a general description of a neighborhood or property type.
- delivered in writing to the qualified intermediary, not verbally to a broker or agent
- received before midnight on day 45, with no grace period for weekends or holidays
- specific enough to identify a single parcel, not a range of acceptable properties
- retained in the exchange file with a dated copy for later reference
An email describing interest in "something along the I-94 corridor" does not satisfy the rule, even if the investor later closes on a specific building in that area.
Common Timing Mistakes During This Window
The most frequent error is treating day 45 as a soft target rather than a fixed deadline, which leaves no room if a title company is slow to confirm a legal description or a broker takes a few extra days to send closing documents. A second common mistake is naming only one property, which works fine until that seller receives a competing offer during due diligence and the investor has no fallback already on the list. A third is confusing verbal interest with formal identification, assuming a phone call to the qualified intermediary counts the same as a written, dated submission.
Common 1031 Exchange Questions
When does the 45-day identification clock actually start?
It starts on the date the relinquished property closes, counted as calendar days including weekends and holidays. There is no separate start date tied to when the investor begins searching.
Can an investor switch from the three-property rule to the 200 percent rule mid-search?
Yes, as long as the final written identification delivered before day 45 reflects whichever rule the investor is actually relying on. The rule choice is determined by what gets submitted, not by an earlier plan.
What happens if day 45 falls on a Saturday?
The deadline does not move. Unlike some other tax deadlines, it does not roll to the next business day, so an identification due on a weekend still has to be delivered on that date.
Is naming a backup property considered a separate identification?
No. All candidates named on or before day 45, whether considered a first choice or a fallback, count as one combined identification under whichever rule applies.
Does the identification list have to include a price?
No price is required for the three-property rule. The 200 percent rule requires knowing fair market value to confirm the combined total stays under the cap, but that value does not need to appear on the identification document itself.
