Never Miss Your 45-Day 1031 Deadline

The two clocks that govern every 1031 exchange

A 1031 exchange lets you defer capital-gains tax when you sell investment or business real estate and reinvest the proceeds into "like-kind" replacement property. In exchange for that deferral, the IRS holds you to two strict, non-negotiable deadlines under Section 1031 of the Internal Revenue Code:

• ›45 calendar days to identify your replacement property, in writing, to your Qualified Intermediary.
• ›180 calendar days to close on the property you identified — or your tax-return due date (including extensions) for the year of the sale, whichever comes first.

Both clocks start on the same day: the day your relinquished property (the one you sold) closes. That is Day 0. Miss either deadline and the exchange typically fails, meaning your gain becomes taxable in the year of the sale.

Why the clock starts at closing — and why you plan before it

The 45- and 180-day periods run from the transfer of the relinquished property, not from listing, going under contract, or when you "start looking." Because the identification window is only 45 days, the practical work of finding replacement property should be well underway *before* you close. Many failed exchanges trace back to sellers who treated Day 0 as the day to begin their search.

Just as important: you cannot take possession of the sale proceeds. A Qualified Intermediary (QI) must hold the funds between the two closings. Engage your QI and sign the exchange agreement *before* the relinquished property closes. If the money touches your hands or bank account, the IRS treats it as a taxable sale and the exchange is over before it begins.

Calendar days, not business days — and (almost) no extensions

The deadlines are measured in calendar days. Weekends and holidays count. If Day 45 lands on a Sunday or a federal holiday, it is still Day 45 — the periods are generally not extended for that reason.

There are effectively no extensions. The single narrow exception is IRS relief for taxpayers affected by a federally declared disaster, which can postpone the deadlines under specific published guidance — but you cannot count on it, and it only applies when the IRS formally issues relief for your area. Plan as though the dates are absolute, because for nearly everyone they are.

The three identification rules

By midnight on Day 45, your written identification must comply with one of three rules. You pick the one that fits your strategy:

1. Three-Property Rule — Identify up to three properties, of any value. This is the most common choice. 2. 200% Rule — Identify any number of properties, as long as their combined fair market value does not exceed 200% of the value of what you sold. 3. 95% Rule — Identify any number of properties of any value, but you must actually acquire at least 95% of the total value you identified.

The identification must be unambiguous — a street address or legal description — signed by you, and delivered to your QI (not to yourself or your own attorney) by the deadline. You may revoke and re-identify freely, but only up until midnight on Day 45.

Five mistakes that blow the deadline

1. Not engaging a QI before closing, so the proceeds are received and the exchange is disqualified. 2. Counting business days instead of calendar days, and running past Day 45 by a weekend. 3. Vague identification — a city, a builder, or "a property like this one" — that fails the unambiguous-description standard. 4. Identifying more than the rule allows, then over-identifying without meeting the 95% acquisition requirement. 5. Relying on a single deal that falls through on Day 46 with no backup identified.

Why a DST works as a fast identification backup

A Delaware Statutory Trust (DST) lets you own a fractional, beneficial interest in institutionally managed real estate, and interests are generally available in defined dollar increments. Because a DST is pre-packaged and does not require you to win a competitive purchase, it can be identified quickly — making it a practical backup property inside your 45-day window if a primary deal stalls. Many investors identify a DST as one of their three properties specifically to protect the exchange clock.

DST interests are securities offered only to accredited investors and carry real risks, including illiquidity and loss of principal. This checklist is educational only and is not tax or legal advice — always confirm your specific dates, identification strategy, and eligibility with your Qualified Intermediary and CPA.