When does the 45-day clock start: closing, funding or recording?

Day zero is the day the benefits and burdens of ownership left you

The regulation fixes the start without naming any document: the identification period "begins on the date the taxpayer transfers the relinquished property and ends at midnight on the 45th day thereafter," and the exchange period is measured from the same date. Transfer, for federal tax purposes, is the moment the benefits and burdens of ownership move to the buyer.

That is a question of fact rather than of forms. The Tax Court's 1981 Grodt & McKay Realty decision weighs whether legal title passed, who has possession, who carries the risk of loss, who pays the property taxes and who takes the operating profits; the earlier Yelencsics decision put it as a sale occurring "upon transferring sufficient incidents of beneficial ownership rather than technical requirements for the passage of title."

In almost every ordinary sale the factors point at one day. Escrow disburses the buyer's money, your deed is released, the keys and the rent roll go with it, and that is day zero.

Escrow funds on Friday, the recorder stamps it Monday: use Friday

Recording gives the world notice of a transfer that already happened, so it is not what starts your 45 days. Legal 1031 states the practice rule plainly: "the date of the closing (not the date of recording) will be the date that the clock starts ticking."

The gap is routine and sometimes long. A deed sent for recording late on a Friday may be stamped the following Monday, and a backlogged county can take two or three weeks. Counting from the stamp would hand you days the statute never gave you, and an identification notice delivered on those imaginary days is simply late.

The safer habit is to treat the earlier of funding and recording as the transfer date whenever the two disagree, and to have the intermediary confirm that date in writing while escrow is still open.

Rent-backs and holdbacks do not move the date; a deed held for a condition might

Staying in the building after closing under a seller rent-back does not delay day zero. Once you are a tenant, title, risk of loss and the right to the property's profits already sit with the buyer, which is what the benefits-and-burdens test measures.

The structures that can move the date are the ones that keep ownership with you: a deed held in escrow until a post-closing condition is satisfied, a contract for deed, or a sale where you keep possession and the economic risk while the buyer holds only an equitable interest.

None of these should be assumed. A transfer date argued for the first time in an audit, against a settlement statement and an exchange agreement that both say something else, is a hard argument to win.

Two closings in one exchange: both clocks run from the earlier one

Paragraph (b)(2)(iii) of the regulation is explicit: "If, as part of the same deferred exchange, the taxpayer transfers more than one relinquished property and the relinquished properties are transferred on different dates, the identification period and the exchange period are determined by reference to the earliest date on which any of the properties are transferred."

Take a hypothetical pair of sales. A duplex closes Monday June 15, 2026 and a rental house closes Monday July 6, 2026, with both sets of proceeds flowing into one exchange. Identification is due Thursday July 30, 2026, only 24 days after the second closing, and every replacement must be received by Saturday December 12, 2026.

The alternative is two exchanges rather than one, which is a decision to make before the first contract is assigned, not after. Combining or splitting sales is a structural choice with its own trade-offs.

• One exchange covering both hypothetical sales: identify by July 30, 2026 and close everything by December 12, 2026.
• Two separate exchanges, two agreements, two segregated accounts: the July 6 sale gets its own August 20, 2026 and January 2, 2027 dates.
• Splitting costs a second intermediary fee and requires the contracts, assignments and proceeds to be kept apart from the outset.
• Sequencing matters: closing the property you can control last does not help, because the earliest closing still governs.
• Tell the intermediary about the second sale before the first one closes, so the earliest-date rule is applied on purpose.

A reverse exchange counts from the titleholder's acquisition, not from your sale

Under the Rev. Proc. 2000-37 safe harbor, the periods attach to the parked property. Section 4.02(4) requires that "no later than 45 days after the transfer of qualified indicia of ownership of the replacement property to the exchange accommodation titleholder, the relinquished property is properly identified," and section 4.02(5) gives 180 days from that same transfer to complete the move.

So the notice you deliver on day 45 names what you are selling, not what you are buying, and closing your sale later does not restart anything. Section 4.02(6) caps the whole arrangement: the combined time the relinquished and replacement property are held in the arrangement "does not exceed 180 days."

The parking structure, its costs and its lender problems are covered separately.

Pin the date down before escrow closes the file

The transfer date is the one input every later deadline depends on, and it is easiest to document on the day it happens.

• Ask the intermediary to state the transfer date, the 45th day and the 180th day in the exchange agreement or a written confirmation.
• Keep the settlement statement and the wire confirmation showing when the buyer's funds were disbursed.
• If funding and recording fall on different days, give the intermediary both and use the earlier date.
• In a reverse exchange, calendar the titleholder's acquisition date, because that is the date on the safe harbor's clocks.
• Have your CPA or attorney confirm the transfer date against the closing documents; nothing downstream of it is adjustable.