A 1031 exchange gives an investor 45 days to identify a replacement property and 180 days total to close on it (IRS, Like-Kind Exchanges Under IRC Section 1031). This post covers business-purpose and investment real property exchanges only, never a personal residence, and it is general information, not tax advice.
Financing the replacement property runs on its own clock, and that clock sits inside the same 180 days. Most investors treat "find the property" and "get it financed" as two steps that happen one after the other. On a live exchange, they have to run at the same time or the deadline wins.
This is general information about how 1031 exchange timing interacts with financing, not tax advice. Consult a qualified tax professional and your Qualified Intermediary before making exchange decisions.
> Key Takeaways
> - The 45-day identification window and the 180-day exchange period both start on the day the relinquished property transfers, and they run concurrently, not back to back (IRS).
> - Borrowing to help close on the replacement property does not, by itself, create boot. Boot comes from cash received, non-like-kind property, or unreplaced debt relief (IRS Instructions for Form 8824).
> - Starting the financing conversation during the 45-day identification window, not after it closes, is what preserves runway for underwriting, appraisal and title.
> - A reverse exchange, using an Exchange Accommodation Titleholder, moves the financing need earlier, to before the relinquished property even sells (Revenue Procedure 2000-37).
> - Eos Loan is a direct lender for business-purpose real estate financing with flexible terms, subject to approval and eligibility.
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What are the 1031 exchange 45-day and 180-day deadlines?
An investor must identify replacement property in writing within 45 days of transferring the relinquished property, and must receive the replacement property by the earlier of 180 days after that transfer or the due date, with extensions, of the tax return for the year of the transfer (IRS, Like-Kind Exchanges Under IRC Section 1031; IRS Instructions for Form 8824).
The identification has to be a signed writing, delivered to someone party to the exchange, usually the Qualified Intermediary, before midnight on day 45. It needs an unambiguous description of the property: an address or a legal description, not "a duplex somewhere in the county." Miss day 45 and the exchange fails, full stop.
The 180-day period is not 45 plus 180. Both clocks start on the same date, the day the relinquished property closes. So day 45 is a checkpoint inside the 180 days, not an additional 180 days tacked on after it. The tax-return-due-date backstop matters too: an exchange that starts late in the calendar year can get compressed below 180 days unless the investor extends that year's return (IRS Instructions for Form 8824).
The IRS can extend these windows for taxpayers in federally declared disaster areas, but that is a narrow exception, not something to plan around.
!An investor reviewing closing paperwork and a calendar at a desk in warm daylight.
For how the financing side of a business-purpose deal is structured end to end, see how business-purpose real estate financing works, and our page on business-purpose financing for residential real estate projects.
Where does financing fit inside the 45-day and 180-day window?
Financing the replacement property is a separate process, and it has to complete inside the same 180 days as the exchange. That means the clock that matters to a lender starts the moment the relinquished property sells, not the moment a replacement property gets identified.
Most ranking content treats "the 45-day rule" and "getting the deal financed" as unrelated topics. They are not. They compete for the same calendar days. An investor who spends the first three weeks of the identification window house-hunting, with no lender conversation started, can identify exactly the right property on day 40 and still miss the 180-day close, because underwriting, appraisal and title never had enough runway.
Starting the financing conversation during identification, not after it, is what buys that runway back. A lender working a deadline-driven deal typically wants entity documents, a scope of work if the replacement property needs improvement, and the purchase contract as soon as one exists, ahead of needing all of it finalized. It also helps to ask a candidate replacement property's seller about their own timeline flexibility and any existing financing that needs to be paid off, before identifying it. A slow seller can eat days the exchange does not have.
Here is the pattern I see across exchange-driven deals: the ones that close cleanly are the ones where the investor opened the financing conversation on day one of the relinquished-property sale, not after identifying the replacement property on day 40. That is a timing discipline observation, not a promise about how fast any specific file will move. Financing early reduces one variable in a transaction that still depends on the Qualified Intermediary, the title company and the seller all moving on schedule. It does not guarantee the exchange closes in time.
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Does borrowing to close on the replacement property create boot?
Not simply by borrowing. Boot generally arises from cash or non-like-kind property received, or from a reduction in debt on the relinquished property that is not offset by new debt or additional cash on the replacement property (IRS Instructions for Form 8824).
The practical version of "debt relief not offset": paying off a smaller loan on the relinquished property and putting a larger loan, or more of your own cash, on the replacement property generally avoids boot on that particular point. What creates it is walking away with net debt relief and nothing offsetting it, or pocketing cash along the way.
There is a second rule that matters just as much and gets explained badly almost everywhere. Funds held by the Qualified Intermediary can never pass through the exchanger's own hands or bank accounts. That is constructive receipt, and it is why acquisition financing for the replacement property is structured as separate loan proceeds, disbursed directly at closing, never commingled with the QI-held exchange funds. It is the single most practical, checkable distinction in the whole topic, and it is rarely stated this plainly.
| | Exchange funds held by the QI | New acquisition loan proceeds |
|---|---|---|
| Who holds it | The Qualified Intermediary, under the exchange agreement | The lender, until closing |
| When it moves | Disbursed by the QI at the replacement-property closing | Funded by the lender at the same closing |
| Touches the investor's accounts | Never. That would be constructive receipt | No, disbursed directly to the closing table |
| Tax treatment | Tax-deferred exchange proceeds | Ordinary business-purpose debt |
| Boot risk | None, if the funds stay with the QI until closing | None, from the borrowing itself |
| What actually creates boot | Any cash the exchanger receives directly | Unreplaced debt relief on the relinquished property, not the new loan |
Boot, when it occurs, is still taxed in the year of the exchange, even though the rest of the gain stays deferred. Whether a specific structure avoids boot on a specific deal is a determination for the investor's tax professional and Qualified Intermediary, not for a lender.
For how business-purpose credit itself is classified, see how business-purpose credit is classified. For what a lender needs cleared at the closing table, see what happens at closing on the replacement property.
What is a reverse 1031 exchange, and how does financing change?
In a reverse exchange the investor acquires the replacement property before selling the relinquished property, using an Exchange Accommodation Titleholder structure recognized under Revenue Procedure 2000-37. That single change moves the financing need much earlier in the process.
A forward exchange lets an investor sell first and shop second. A reverse exchange flips that: the replacement property has to be acquired, and sometimes improved, while the relinquished property is still being marketed and sold. The same 45-day identification and 180-day completion windows still apply, they are just measured from the date the Exchange Accommodation Titleholder takes title to the replacement property, rather than from a relinquished-property sale that has not happened yet.
That timing shift is why a reverse exchange typically needs an investor's financing relationship and documentation ready earlier than a standard exchange does. There is no relinquished-property sale proceeds sitting with a Qualified Intermediary yet to lean on. The acquisition financing has to be lined up, and often closed, before the rest of the exchange machinery even starts.
How does a direct lender handle business-purpose financing during an exchange?
Eos Loan is a direct lender. It originates, underwrites and services the credit itself, so an investor racing an exchange deadline works with one team from application to funding instead of being handed between parties.
In practice that means one point of contact, decisions made in-house, and no handoff between a broker and a separate funding source on a file where every day matters. Eos Loan charges no dealer fee. Eos Loan has originated $4B+ across 30k+ proposals processed, all subject to approval and eligibility.
Like-kind exchanges are also not a fringe tactic. Research from Ling and Petrova has found that investors using a 1031 exchange typically acquire replacement property worth more than the property they sold, and that most investors who use an exchange do so only once before eventually selling and paying the deferred tax. That pattern is consistent with exchanges being a well-established, widely used mechanism in commercial and investment real estate, which is why financing demand tied to exchange deadlines is a durable category, not a seasonal spike.
Once the replacement property is closed, most investors are already thinking about the next one. Moving from one investment deal to the next covers that side of the cycle.
Ask about flexible terms for fix and flip projects
Or call +1 833-989-3737 to talk through a deadline-driven exchange with our team. More common financing questions are answered on our FAQ page.
Frequently Asked Questions
question: "Can you get a loan for a 1031 exchange replacement property?",
answer: "Yes. Business-purpose acquisition or improvement financing is a common way to fund part of a replacement property's purchase price, structured as separate loan proceeds disbursed directly at closing rather than commingled with Qualified-Intermediary-held exchange funds."
},
{
question: "What is the 45-day rule in a 1031 exchange?",
answer: "The investor must identify replacement property in writing, delivered to the Qualified Intermediary, within 45 days of transferring the relinquished property (IRS, Like-Kind Exchanges Under IRC Section 1031)."
},
{
question: "What is the 180-day rule in a 1031 exchange?",
answer: "The investor must receive the replacement property within 180 days of transferring the relinquished property, or by the tax return due date for that year, with extensions, if earlier (IRS Instructions for Form 8824). The 180 days run concurrently with, not in addition to, the 45-day identification period."
},
{
question: "Does taking out a loan create boot in a 1031 exchange?",
answer: "Not simply by borrowing. Boot generally comes from receiving cash or non-like-kind property, or from debt relief on the relinquished property that is not offset by new debt or added cash on the replacement property (IRS Instructions for Form 8824)."
},
{
question: "What is a reverse 1031 exchange?",
answer: "A structure where the replacement property is acquired, through an Exchange Accommodation Titleholder, before the relinquished property is sold, under Revenue Procedure 2000-37. The same 45- and 180-day windows apply, measured from that earlier acquisition date."
}
]} />
The two clocks are the same clock
A 1031 exchange and the financing behind its replacement property are not two separate timelines that happen to overlap. They are one clock, read two ways.
- The 45-day identification window and the 180-day exchange period both start on the relinquished-property closing and run concurrently.
- Financing has to complete inside that same 180 days, so start the conversation during identification, not after it.
- Borrowing does not create boot by itself. Commingling exchange funds with loan proceeds, or receiving cash or debt relief that is not offset, is the real risk.
- A reverse exchange moves the financing need earlier, before the relinquished property even sells.
This is general information, not tax advice. Consult a qualified tax professional and your Qualified Intermediary before making exchange decisions.
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About the author: Eduardo Donadi is the CEO of Eos Loan, a US direct lender financing essential projects and business-purpose real estate projects including fix and flip, fix and keep and fix and hold. He works with investors on how deals, and the financing behind them, get structured and sequenced against a deadline.
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Sources
1. Internal Revenue Service. "Like-Kind Exchanges Under IRC Section 1031." Retrieved 2026-09-30. https://www.irs.gov/node/5256
2. Internal Revenue Service. "Instructions for Form 8824." Retrieved 2026-09-30. https://www.irs.gov/instructions/i8824
3. Internal Revenue Service. "Revenue Procedure 2000-37." Retrieved 2026-09-30. https://www.irs.gov/pub/irs-drop/rp-00-37.pdf
4. Ling, David C., and Milena Petrova. "Economic Impact of Repealing or Limiting Section 1031 Like-Kind Exchanges in Real Estate." Real Estate Issues / Federation of Exchange Accommodators-affiliated research, 2020. https://1031buildsamerica.org/wp-content/uploads/Ling-Petrova_Like-Kind-Exchanges_RELKEC_10-05-20-final.pdf
5. Eos Loan. Company origination data. https://www.eosloan.com