Written by
Comunidad Oasis Park, Doral: casas modernas con rooftop cerca de CityPlace
How does the 45/180-day clock work on a 1031 exchange in Miami?
A 1031 exchange in Miami runs on two deadlines that start the day your relinquished property closes and cannot be extended for convenience. You have 45 calendar days to identify replacement property in writing, and 180 calendar days from that same closing date to complete the acquisition — or the due date of your tax return for that year, including extensions, whichever comes first. The 180 days run concurrently with the 45, not after them. You must also engage a qualified intermediary before closing on the sale, because once the proceeds touch your account the exchange is over.
By Erika Schell, P.A. | August 2026
Key takeaways
- A 1031 exchange runs on two deadlines from the day your sale closes: 45 days to identify replacement property in writing and 180 days to close on it.
- Engage a qualified intermediary before the sale closes — once the proceeds reach you, the 1031 exchange is over.
- To defer the full gain in a 1031 exchange, both replacement value and reinvested equity must equal or exceed what you sold.
Most Miami investors know what a 1031 exchange is in principle. What derails exchanges here is never the concept — it is the calendar and the paperwork. This is the operational version: what happens on which day, who has to be involved, and what qualifies as replacement property in Miami-Dade.
Engage the qualified intermediary before you close
This is the step with no remedy. A qualified intermediary is an independent party who takes assignment of your sale contract, receives the proceeds directly at closing, holds them, and later applies them to the purchase. If the funds are wired to you, or to your attorney’s trust account on your behalf, the IRS treats it as constructive receipt and the exchange fails. There is no cure after the fact.
The intermediary must be independent — not your attorney, CPA, real estate agent or employee, if they have acted for you in the two years before the exchange. Because Florida does not license or bond intermediaries, vet the one you pick: ask where funds are held, whether accounts are segregated, what fidelity bond and errors-and-omissions coverage they carry, and who is authorized to move money. The IRS overview of like-kind exchanges is the primary reference for the rules themselves.
Day 0 to day 45: identification
The clock starts on the closing date of your relinquished property. By midnight of day 45 you must deliver a written, signed identification of the replacement property to the intermediary, unambiguously describing each property by legal description or street address.
Three identification rules exist, and you choose one:
- Three-property rule. Identify up to three properties of any value. This is what most Miami investors use.
- 200 percent rule. Identify any number of properties as long as their combined fair market value does not exceed 200 percent of the relinquished property’s value.
- 95 percent rule. Identify any number of properties of any value, but you must acquire at least 95 percent of the total value identified.
Day 45 is a hard date. It does not move for weekends, holidays, a failed inspection or a seller who backs out. This is why identifying a genuine backup — not a placeholder you would never buy — is the single most valuable habit in a Miami exchange, where competitive inventory can disappear inside a week.
Day 46 to day 180: acquisition
You have 180 calendar days from the original closing to take title to the replacement property. If your tax return for that year is due before day 180 and you do not file an extension, the earlier date governs — which is why exchanges that begin in the fourth quarter almost always require an extension.
To defer the full gain, two conditions have to hold: the replacement property’s value must equal or exceed the relinquished property’s net sale price, and all of the equity must be reinvested. Any shortfall in either — cash taken out, or debt replaced with less debt — is “boot” and is taxable in that year.
What qualifies as replacement property in Miami-Dade
Both properties must be held for investment or productive use in a trade or business. Like-kind is interpreted broadly for real property: a Brickell condominium can be exchanged for a Doral warehouse, raw land for a rental duplex, a single property for several. What does not qualify is a personal residence, a second home used primarily by the owner, or property acquired for resale.
The practical constraint in Miami-Dade is not qualification, it is inventory. Finding a suitable replacement inside 45 days in a market where desirable investment product moves quickly is the real work, and it should begin before the relinquished property closes rather than after. In practice I start the replacement search when the sale goes under contract.
Reverse and improvement exchanges
When the right replacement appears before your sale closes, a reverse exchange lets an exchange accommodation titleholder acquire and park the replacement property until the sale completes. It is more expensive and more complex, and it requires financing that permits the structure, but in a tight Miami market it is sometimes the only way to secure the property you actually want.
An improvement exchange lets exchange funds pay for construction on the replacement property within the 180-day window. Both structures need to be set up with the intermediary before anything closes.
Where an exchange fits in a Miami portfolio
A 1031 exchange defers tax; it does not eliminate it. Deferral compounds, and each exchange lets the full pre-tax proceeds go back to work, which is why long-horizon investors chain them. The conceptual case and the portfolio logic are set out in the 1031 exchange in Miami luxury real estate, and the broader investment framing in investing in Miami luxury real estate.
Foreign sellers should note that FIRPTA withholding and a 1031 exchange interact, and the withholding is on gross proceeds. Coordination between the intermediary, the closing agent and the CPA is required — see FIRPTA for Miami buyers and sellers.
Frequently Asked Questions
Can I extend the 45-day deadline on a 1031 exchange in Miami?
No, not for ordinary reasons. The only relief comes from IRS disaster declarations, which have occasionally extended deadlines for taxpayers affected by named hurricanes in Florida. Plan as though there is no extension.
Do I need a qualified intermediary if I close both sides on the same day?
Yes. Simultaneous exchanges still require an intermediary in practice to avoid constructive receipt of the proceeds. Attempting a same-day swap without one puts the deferral at risk.
Can I do a 1031 exchange on a vacation home in Miami?
Only if it is genuinely held for investment. The IRS has published a safe harbor involving minimum rental days and limited personal use. A property used primarily by the owner does not qualify.
What happens if I miss the 180-day deadline?
The exchange fails and the gain becomes taxable in the year the relinquished property was sold. The intermediary returns the funds, generally after the identification period or the 180 days have run, depending on the agreement.
Can I exchange one Miami property for several?
Yes. One-to-many and many-to-one are both permitted, as long as identification rules are met and the total value and equity conditions are satisfied to avoid boot.
Start the replacement search before you close the sale
The 45 days are the constraint, and the way to beat them is to begin looking while the sale is still under contract. If you are considering an exchange in Miami-Dade, let’s map the timeline and the replacement candidates now. Reach out through the contact page or call 786-801-4442.
About Erika Schell, P.A.
Erika Schell is a Luxury Certified REALTOR® with The Keyes Company, affiliated with Forbes Global Properties, and an 8-time Top Producer at Keyes Doral serving buyers, sellers, and investors across Miami-Dade County. Florida Real Estate License #3366404. With a Master’s in Finance and more than 20 years of corporate experience, Erika brings the precision of a financial analyst to every luxury transaction. This article is general information, not tax or legal advice; confirm your situation with a CPA and a qualified intermediary.