The question every seller asks going into a 1031 is what happens if they can't find a replacement property. The popular answer right now is that a structured installment sale can sit behind the exchange and catch it if the 45 days run out.
It can't. Not with better paperwork, not with a side letter, not with a different carrier. But the amount of flexibility you can legitimately keep is far larger than most sellers are told, and it is open right up to the closing table.
You sign the purchase agreement without committing to a number. The split between cash and installment payments is written as a range, not a figure.
You fix the number five business days before closing. Not at signing, and not on day 45.
A 90 to 120 day escrow gives you roughly five months of looking first. It is a standard commercial term and it costs nothing to ask for.
Every escrow extension extends your deadline automatically, if the clause is tied to the closing date instead of a calendar date.
The exchange gets sized to the property you actually found, so the gap becomes deferred gain instead of a taxable check.
The one thing you cannot do is wait until after closing. That is the only hard line, and everything on this page exists because of it.
Get this out of the way first, because everything useful on this page depends on it.
At closing, escrow wires the proceeds straight to the qualified intermediary. The seller never touches them. That is the entire function of the QI and it is what keeps the exchange alive.
If the exchange then fails, the QI owes the seller cash and the seller has an unrestricted right to it. Directing that money into an annuity at that point is receiving it. The gain recognizes and the seller has bought an annuity with after-tax dollars.
An installment sale under IRC §453 requires a genuine deferred payment obligation of the buyer, created at closing, that the seller never had the right to take as cash. Once the QI holds the money, that obligation does not exist and cannot be manufactured.
This is not a product gap. We put the question in writing to a major structured settlement carrier's institutional markets desk. Their answer: no reversionary clause for a triggering event is filed with the funding agreement product, and the assignment cannot occur at or before closing. A different carrier gives the same answer, because the constraint is the tax law and not the annuity.
One important qualification, because it is the exception that actually exists: a structured installment sale cannot rescue a failed exchange, but an Opportunity Zone fund sometimes can. That route is covered further down and it runs on a different clock.
For the structure itself, the real question is not how to rescue a failed exchange. It is how much can stay undecided, and for how long.
Most people treat this as a binary chosen at signing: either you are doing a 1031, or you are doing an installment sale. That throws away the only real optionality in the deal.
The purchase agreement can instead say that a portion of the price, somewhere inside a stated range, will be paid as periodic payments rather than cash, with the exact figure fixed by written notice a set number of business days before closing.
There is a meaningful difference between “Seller may elect to take some of the price as periodic payments” and “Seller shall specify, within a range, how much of the price is paid as periodic payments.”
The first reads as a seller who might decide to do a tax thing at the last minute. The second reads as a negotiated commercial term where only the sizing was left open. Same economics, much stronger paper. Use a floor above zero and a default, so a deferred obligation always exists and only its size is in question.
A higher floor looks stronger on paper. It also costs real money in the best case, and that tradeoff is worth understanding before anyone picks a number.
On a $4M sale with a hard 40% floor, a seller who finds a full $4M replacement can only route $2.4M to the qualified intermediary. They now need $1.6M of outside cash to close the replacement, or they take boot they never needed to take.
Set the floor at the portion the seller is confident they will not replace. A small floor still does the work of establishing that a deferred obligation was always part of the deal. It does not need to be large to do that.
| Where the seller actually is | Sensible floor |
|---|---|
| Already touring, expects to fully replace | 10 to 15% |
| Wants to partially cash out or downsize | 40 to 50% |
| Done being a landlord, the exchange is a maybe | 60% and up |
Whatever the floor is, it has to clear the carrier minimum in dollars. A $100,000 floor is common. On a $4M deal that is 2.5%, so it rarely binds. On a $250,000 land parcel it binds immediately.
When the deadline arrives, the rule is mechanical.
Exchange portion = the replacement property actually under contract.
Everything else goes into the structure.
A 1031 only defers fully if the seller buys equal or greater value and reinvests all the proceeds. Any shortfall is boot, and boot is taxable in the year of sale. So on a $4M sale where the seller is under contract on a $2.4M building, they fix the split at 60% to the qualified intermediary and 40% to periodic payments.
Without the range, that $1.6M gap comes back as taxable boot in a single year. With it, the same $1.6M becomes deferred installment gain recognized as payments arrive, across lower brackets, on a schedule the seller chose.
The flexibility is not comfort. It converts boot into deferral. Run the actual figures and the difference is usually the largest single number in the transaction.
That last one changes more outcomes than the math does. Forty five days of touring buildings tells a sixty year old something about the next ten years that no spreadsheet does.
Everything else on this page is about managing uncertainty. This removes it. It needs no contingent language, no novel structure and no opinion letter, and it is the single highest leverage change a 1031 seller can make.
Close the sale → start hunting → 45 days → hope.
The seller commits to the entire exchange before knowing whether anything worth buying exists. By the time they find out, the money is with the qualified intermediary and every option has already narrowed to what was written down before closing.
Hunt first → get the replacement under contract → then close the sale, sized to it.
Now the election deadline is not a guess. The seller knows the exact replacement price, so the exchange gets sized to that number and the remainder goes into the structure. The 45 days become a formality instead of a scramble, because identification is just naming the building that is already under contract.
Start looking for replacement property now. Nothing in the regulations says a seller cannot shop before they sell. The 45 days is a deadline for identification after closing, not a rule against looking earlier.
With normal contingencies, and a closing date set to follow the relinquished sale. The seller now knows the number. They can assign their rights in that contract to the qualified intermediary when the time comes.
Low floor, since the seller expects to replace most of it. The band only has to cover the gap between the sale price and the replacement price.
Fix the split at the real number. Exchange portion equals the replacement contract. Everything above it goes into the structure instead of coming back as taxable boot.
Identification on day 45 names a building already under contract. No scramble, no day 43 DST chosen under deadline pressure, no failed exchange.
The seller can go under contract on the replacement first, but they generally cannot take title to it before the relinquished property closes. Doing that is a reverse exchange, which is legal but runs through a parking arrangement with an exchange accommodation titleholder and costs materially more.
So the goal is to be under contract and ready to close, with the replacement closing timed to follow the sale. Coordinate the two escrows with your qualified intermediary before either one is signed.
The reason most sellers do not do this is simple. Nobody tells them to start looking before the listing sells, because it feels premature. It is not premature. It is the only point in the transaction where they still hold every option.
Before the purchase agreement is signed, nothing is committed and everything is still negotiable. This is where the real flexibility lives, and none of it requires a novel structure. It requires asking for terms most sellers never think to ask for.
The most underused lever in the entire transaction. A 90 or 120 day escrow instead of 30 gives the seller three to four months to shop replacement property before the 45 day clock even starts. It is a standard commercial term, costs nothing, and buyers routinely agree to it when the alternative is no deal.
Stack that on the election deadline and a seller can have five months of looking before they have to commit to a number.
Write it as “the fifth Business Day prior to Closing” rather than a fixed date. Then every escrow extension automatically extends the decision window. Deals get extended constantly. Free optionality, one drafting choice.
Where the asset is legally divisible, sell one parcel into the exchange and the other as an installment sale. Two distinct transactions with separate legal descriptions is cleaner delineation than any price allocation, and carriers specifically ask for clear delineation. If a lot split or condominium map is feasible, it is worth exploring before listing.
Buy the replacement property first, through a parking arrangement with an exchange accommodation titleholder, then sell the relinquished property into it. This eliminates the 45 day risk entirely, because the replacement is already secured.
It costs materially more and needs financing that works with a parked title, so it is not for every deal. But for a seller whose main fear is the clock, it answers the fear directly, and the leftover can still be structured.
A buyer who was already open to seller financing makes all of this natural rather than engineered. When two offers are close, the one whose structure cooperates may be worth more after tax than the higher headline number. Worth telling the listing broker what to watch for before offers come in.
These five, plus the band and finding the replacement before selling, are the pre-closing set. There is no additional §453 structure hiding behind better drafting.
For the structure, the constraint is not paperwork, it is the closing. Before it, everything is a negotiable term. After it, the qualified intermediary holds money the seller has a right to, and anyone offering a §453 structure at that point has to explain why the seller's right to that cash is not constructive receipt. The one genuine post closing route is an Opportunity Zone fund, which runs on its own statute and its own clock.
This is the part most sellers have backwards. They think the choice is 1031 or installment sale. It is not. The exchange takes whatever the replacement property absorbs, and the only question is what happens to the part left over.
That leftover is boot, and boot has exactly two destinations: taxable cash this year, or deferred payments. Nothing else.
| How it is written | To the exchange | To the structure | When the gain is taxed |
|---|---|---|---|
| Straight sale no exchange, no structure |
$0 | $0 | All of it, year of sale |
| Exchange only the default most sellers end up in |
$2,400,000 | $0 | $1,600,000 of boot, year of sale |
| Exchange plus structure the boot is what gets structured |
$2,400,000 | $1,600,000 | Spread as payments arrive |
| Structure only no replacement wanted or found |
$0 | $4,000,000 | Spread across the whole schedule |
Illustrative allocation only. What the deferral is actually worth depends on basis, depreciation recapture, state of residence, the payment schedule and the seller's other income. Run the real numbers here.
The exchange is identical in both. Same $2.4M, same replacement property, same qualified intermediary, same 45 and 180 day clocks. The only thing that changed is what happened to the $1.6M that was never going into the building anyway.
That is the entire decision, and it is the reason this does not conflict with anyone's exchange.
Nothing here moves money away from your exchange. The structure takes the boot, which is the money that was coming back to your client as a taxable check regardless of how well the exchange goes. Sizing the exchange to the replacement property they actually locked makes the exchange cleaner, not smaller.
The carrier prices a payment schedule so the seller can see what the deferred portion actually pays and over what term. This is what makes the decision informed rather than abstract.
Written notice setting the exact figure inside the range. Irrevocable on delivery. Everything up to this moment was spent shopping replacement property.
Annuity rates move daily, so the quote is locked against the fixed figure and schedule. Carriers generally want one to two business days of lead time here.
Amended disbursement instructions so each portion goes to its own destination and none of it to the seller. This is the step that quietly fails when it is rushed.
Escrow disburses. Exchange portion to the QI, deferred portion to the assignment company, any balance to the seller. The deed records and the 45 day clock starts.
Because the five days are not only logistics. A seller who sits down at closing holding an unconditional right to take cash and chooses an annuity instead is in a far weaker position than a seller whose contract already defined part of the price as a deferred obligation days earlier. Locking the figure before closing keeps it a choice about the form of consideration rather than a decision about money already coming to them.
Your attorney writes the words and your state's conventions govern the form. These are the provisions that do the work, and none of them name a carrier, an annuity, or an assignment company.
Carriers in this space will tell you directly that they must not be mentioned in the purchase agreement. The phrase that does the job is “a third party assignee designated by Seller.” The obligation has to read as a genuine deferred payment obligation of the buyer, not as a disguised purchase of an annuity, and the assignment is a separate document executed later.
Because the buyer's cash outlay is identical either way. They fund the full purchase price at closing regardless of where inside the range the split lands. Escrow simply routes the deferred slice to the assignment company instead of to the seller. Say exactly that when buyer's counsel pushes back.
One caveat: if there is a lender, their closing instructions may care how settlement funds are disbursed. Flag the range to the lender early rather than two days out.
If the seller fixes the deferred portion at 100%, there is no exchange, because nothing reaches the qualified intermediary. That is fine when it is intentional, but the QI assignment and notice to buyer are normally executed before closing. If the top of your range is 100%, either hold the QI engagement until the notice lands or write the exchange documents to flex with it. Getting that backwards leaves a QI assigned into a deal with nothing to intermediate.
This is the real answer to “I cannot find a deal,” and it is what experienced QIs push. A DST is a fractional interest in institutional real estate that qualifies as like kind replacement property. List one among the identified properties on day 45, and if the primary falls through the exchange closes into the DST instead of dying.
Careful with the acronym. A Delaware Statutory Trust is 1031 replacement property. A Deferred Sales Trust is a completely different §453 structure with contested treatment. Unrelated. See why we are not a deferred sales trust.
Close late enough in the year that the 180 day window runs into the next tax year. If the exchange does fail and the seller receives proceeds in year two, the gain can land in year two. No product, no carrier, no cost, and it stacks with everything else here. Confirm release timing with your QI, since it turns on when they are permitted to return funds.
Another route into institutional ownership for a seller who no longer wants to operate property. Worth raising alongside the DST when the real objection is “I am done being a landlord” rather than “I cannot find a building.”
Everything above is about decisions made before closing, because that is where a §453 structure has to be built. Opportunity Zones are the exception, and it is worth understanding precisely why.
The window to invest a gain into a Qualified Opportunity Fund is 180 days measured from the sale, and it runs in parallel with the exchange period rather than after it. So a seller whose exchange collapses at day 46 for want of an identified property still has roughly 134 days of OZ window left.
That is not a structure bolted on after the fact. It is a separate deferral election under its own statute, with its own timetable, that happens to overlap the exchange.
The original program deferred gain only until a fixed date of December 31, 2026, which made it close to useless as a deferral tool by the end of its life. The successor rules move to a rolling deferral running to the fifth anniversary of the investment, which restores it as a real option rather than a countdown. IRS Notice 2026-40 carries the transition guidance, and gains realized before 2027 can qualify under the new framework when invested after January 1, 2027, subject to the 180 day rules.
One limit the IRS has stated plainly: a mandatory December 31, 2026 inclusion from an earlier Opportunity Zone investment cannot itself be deferred into a new one.
This is a deferral into an illiquid fund with real estate and business risk, not a payment schedule. It carries the same lockup critique as a DST, the holding period requirements are long, and only the gain goes in, not the whole proceeds. A seller who wanted income and certainty is not going to find it here.
It is the right tool for a seller who still wants exposure and growth, and the wrong one for a seller who is tired and wants a known number on a known date.
The transition guidance is new, so have a CPA confirm the timing against the specific sale before anyone relies on it. See also Opportunity Zone vs installment sale.
Property held in an LLC or partnership where one owner wants to exchange and another wants out is the most common deadlock in this whole area, because the entity does the exchange, not the individual members.
The standard answer is to distribute tenant in common interests to the members before the sale, so each co-tenant then does what suits them: one into an exchange, another into an installment structure, another straight to cash. It is well travelled, and the IRS does look at how long the TIC interests were held before the sale, so it needs to be done early and with counsel, not the week of closing.
Easy to forget: §453 does not require an annuity, an assignment company, or a carrier. A seller who simply takes a note from the buyer is on the installment method. No minimum, no due diligence questionnaire, no quote lock, no five day deadline.
What the carrier version buys is the removal of buyer credit risk and a funded schedule that does not depend on the buyer still being solvent in year twelve. That is worth a great deal on a large sale. On a $250,000 land parcel that falls under the carrier minimum, a plain carryback may be the only §453 available, and it is a perfectly real one.
An installment note paired with a non recourse “loan” against it that delivers most of the cash up front. The IRS has pursued these aggressively, including a proposed listing notice and Justice Department litigation against promoters. The deferral is not worth the exposure.
Promoters market exactly the thing this page says does not exist: converting funds the qualified intermediary is already holding into a trust note after the exchange has gone sideways. That treatment has never been blessed, and the promoter economics should tell you something.
The tell is simple. Any structure claiming to work after the qualified intermediary holds the money has to explain why the seller's right to that cash is not constructive receipt. Most cannot.
Installment reporting under §453 is long standing statute. The structured version, where the buyer's payment obligation is assigned to a third party that funds the payments with an annuity, rests on general §453 principles and the structured settlement analogy rather than on a rule that names it.
Practitioners have asked for clarity. A 2025 letter in Tax Notes argued that the IRS or Congress should clarify when structured installment sales will be respected, and a related proposal to the California Lawyers Association would tighten the regulations against promoted installment arrangements by requiring the buyer to continue the seller's business or hold the assets for a period.
The abuse those proposals target is an intermediary that buys the asset on installment and immediately resells it for cash. In a genuine structured installment sale nothing like that happens. The real buyer purchases the property and keeps it. No intermediary ever owns the asset. Only the payment obligation moves.
That distinction is the one worth holding on to, and it is the reason the documentation matters as much as the math. Keep it crisp in writing on every transaction, and watch for proposed regulations, because the labels in this field get used loosely and a rule drafted broadly could sweep in transactions it was never aimed at.
Everything on this page has to be in the purchase agreement before it is signed. Once the relinquished property closes, the options collapse to what was already written down. If there is a sale coming and the replacement property is not nailed down, that is the conversation to have now, not on day 44.
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Related reading: the full math on a $4M sale · DST lockup vs a structured sale · is a structured installment sale legitimate? · not a deferred sales trust · for commercial real estate agents · for brokers
