July 11, 2026 · 5 min read
The 1031 clock starts before you sell
The 45-day and 180-day exchange windows, what deferral actually covers, and why owners plan the sale and the replacement purchase together.
Forty-five days. That is how long an owner has, after the sale of an investment property closes, to identify in writing the replacement property they intend to buy. Not forty-five business days. Forty-five calendar days, weekends and holidays included, with no extensions for a deal that falls apart on day forty-four.
In a King County market where homes are currently averaging about 51 days just to go under contract, the arithmetic is worth staring at: the identification window can be shorter than the time it takes a typical listing to find its buyer. That is why experienced exchangers treat the 1031 not as something that happens after a sale, but as a plan that starts well before the listing goes live.
First, the required sentence, because it is true: this is general information, not tax advice, and the details of any exchange should be confirmed with your tax advisor before you act.
What a 1031 exchange actually defers
Under Section 1031 of the federal tax code, an owner who sells real property held for investment or business use, and buys like-kind replacement property through the proper process, can defer the federal tax that a plain sale would trigger. The IRS's own guidance lays out the mechanics.
Two liabilities are on the table. The first is federal capital gains tax on the appreciation. The second, which surprises longtime landlords more often, is depreciation recapture: the deductions taken over years of ownership come back as taxable income at sale, at federal rates of up to 25 percent. For an owner who has held and depreciated a rental for a decade or two, recapture alone can be a six-figure line item. A properly executed exchange defers both. Deferral is not forgiveness; the tax basis carries into the replacement property, and the bill waits rather than disappears. For many owners that wait is the entire point, because capital that would have gone to taxes keeps compounding in the next property.
One piece of Washington-specific good news belongs here. Washington's capital gains excise tax, in effect since 2022, exempts real estate sales outright: the Department of Revenue's guidance lists the sale of all real estate among the exemptions. So for a straightforward sale of a Washington rental, the state-level capital gains excise is generally not part of the calculation. The federal side is where the planning lives.
The two clocks
The moment your sale closes, two countdowns start running at once, and both are rigid.
Day 45 is the identification deadline. The replacement property, or a short list of candidates under the identification rules, must be designated in writing to the qualified intermediary. Day 180 is the closing deadline: the purchase of the replacement must be complete within 180 days of the sale, or by the due date of that year's tax return if it comes first. The two windows run concurrently, not back to back, so identifying on day 44 leaves only 136 days to close.
The identification itself has rules worth knowing at a high level. Owners commonly name up to three candidate properties regardless of value, or more than three if their combined value stays within limits set by the regulations. Naming several candidates is standard practice precisely because deals die: if the first choice falls through on day 90, a properly identified backup keeps the exchange alive, while an owner who named only one is simply out of time. Your intermediary and tax advisor will walk through which identification approach fits.
There is one more rule that moves the real start of the clock even earlier: the seller cannot touch the proceeds. The money must go from the closing directly to a qualified intermediary, a third party engaged before the sale closes. Take constructive receipt of the funds, even briefly, and the exchange is off. Which means the intermediary, the exchange documents, and ideally the replacement search all need to exist before the first clock officially starts.
Why the sale and the replacement get planned together
Put the pieces side by side and the conclusion writes itself. The identification window is fixed and short. The market's pace is what it is. The intermediary must be in place at closing. So owners who exchange successfully tend to work backward: they shop the replacement market first, sometimes get a candidate under contract contingent on their sale, and only then set the listing and closing schedule of the property they are selling. Some negotiate longer closings or rent-backs on the sale side to buy breathing room on the purchase side. Reverse exchanges, where the replacement is acquired first through an accommodation arrangement, exist for exactly this squeeze, though they add cost and complexity.
Whether an exchange makes sense at all is a bigger question than the deadlines. It depends on the gain, the depreciation taken, the appetite for continuing to own real estate, and what the equity could earn elsewhere; the arithmetic in rent it out or sell it is the natural companion piece. If the property has tenants, the timeline questions compound, and selling a rental with tenants in place covers that side. And whether deferral fits your situation at all depends on where you are in your real estate journey: an owner consolidating toward retirement and an owner trading up to a larger property can look at the same rules and reach opposite answers, both correctly.
What the deadlines reward, in every case, is the owner who treated the exchange as part of the sale plan rather than an afterthought discovered at the closing table.
Questions worth sitting with
- Is your equity working as hard as you did to build it?
- What would you actually walk away with, after everything?
If an exchange might be part of your plan, the Pellego Sale Planning Team can help you sequence the sale and the replacement search so the calendar works for you instead of against you.
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