James sold a $950,000 office building and identified a $600,000 retail property that needed renovation. Using the exchange, he funded $350,000 of improvements from the held proceeds, bringing the total value to about $950,000. Finishing the work by Day 147 let him defer roughly $142,000 in tax across both the purchase and the improvements.
This case study is illustrative. Names, figures, and details are composite examples based on common investor scenarios. Consult a qualified tax professional for advice specific to your situation.
A tired building and a $142,000 tax bill
James had owned a 12,000-square-foot office building in Portland for eight years. It was fully leased to long-term tenants and threw off steady rent. When the anchor tenant signed a 10-year renewal, he decided it was a good moment to sell and move the money into something with more upside.
He sold for $950,000. Eight years of depreciation had pulled his cost basis down to about $475,000, which left a capital gain of roughly $475,000. At combined federal, state, and net investment income tax rates near 30%, a straight sale would have handed about $142,000 to the government and left him with far less to put back to work. To hold the same position, he'd have had to borrow the difference or buy something cheaper than what he sold.
Then his broker called with a different kind of deal: a 20,000-square-foot retail building listed at $600,000 that needed real work. The seller was a bank that had foreclosed and wanted a fast close, with no interest in fixing anything first. The structure was sound but dated - aging HVAC, tired finishes, a roof with deferred maintenance.
James walked the property with his contractor and priced the work: new HVAC ($85,000), new roof ($120,000), interior finishes ($95,000), and a parking-lot overlay ($50,000). About $350,000 in all.
His broker laid out the move: buy the building for $600,000 through a 1031 exchange - the tax-code provision that lets an investor roll the proceeds of one investment property into another and defer the capital-gains tax - then use the leftover proceeds to pay for the renovation. Done right, James would end up with a property worth $950,000 or more and owe nothing on the gain for now.
This was his first improvement exchange, the version of the deal where the leftover proceeds fund construction on the replacement property instead of simply buying something more expensive.
How the exchange was structured
James's qualified intermediary (QI) - the independent party that holds the sale proceeds so the seller never takes possession of the cash - ran the deal in eight steps:
- Sale. James sold the office building on April 15, 2026 for $950,000. The proceeds went to the QI, not to James.
- Identification. By May 30 (Day 45), he formally identified the $600,000 retail building as his replacement property.
- Acquisition. On June 1 the QI closed on the building and paid the seller in full from the held funds. The QI held title, either as an agent or through a holding trust, depending on its setup.
- Improvement plan. James and his contractor locked the scope: new HVAC ($85,000), new roof ($120,000), interior renovation ($95,000), parking-lot overlay ($50,000). Total: $350,000.
- Construction. Work ran from June 15 to September 8, starting right after closing.
- Payments. The contractor submitted invoices with proof of work, and the QI paid them directly from the held funds. James never paid a bill himself.
- Completion. Work finished on September 8 (Day 147), with final inspections and punch-list items done by September 12.
- Closing. On September 15 (Day 154), the QI transferred the finished property to James. The deed was recorded, and he owned a renovated building worth $950,000 or more.
The numbers
The sale on its own:
- Sale price: $950,000
- Cost basis: $475,000
- Capital gain: $475,000
- Combined tax rate (20% federal, 6% state, 3.8% NIIT): about 29.8%
- Tax on a straight sale: about $142,000
The exchange:
- Proceeds held by the QI: $950,000
- Paid to the seller: $600,000
- Remaining in the QI account: $350,000
- Improvements funded by the QI: $350,000
- Final property value: about $950,000 ($600,000 purchase plus $350,000 of work)
- Tax deferred: about $142,000
James's team tallied the benefit at about $492,000: the roughly $142,000 in deferred tax, plus the $350,000 of improvements he was able to fund with proceeds that hadn't been taxed rather than with cash left over after the IRS took its cut. Instead of a $950,000 sale that shrank to a smaller after-tax pile, he owned a renovated building worth $950,000 or more with no tax paid on the gain. The improvements are also depreciable going forward, which adds future deductions.
Where the planning paid off
James had the scope of work finalized before Day 45, so identification and structuring held no surprises. His QI had run improvement exchanges before and had a working process for coordinating the contractor, approving invoices, and paying them. His contractor had done QI-funded jobs and understood that every invoice went to the QI, never to James. Every invoice, change order, and payment was documented, which matters because the IRS can revisit an improvement exchange years later.
One judgment call did the heavy lifting. Before any work started, James's contractor and tax advisor confirmed that the entire scope counted as capital improvements rather than repairs. A new roof, new HVAC, and a full interior renovation add value or extend a building's useful life; repairs and routine maintenance don't. Had the IRS reclassified the work as repairs, part of the deferred gain could have become taxable.
What nearly went wrong
Two things slipped anyway. The HVAC equipment was backordered and didn't arrive until July 1, two weeks late; James had built slack into the schedule, but a four-week delay would have squeezed him hard. Then, mid-renovation, the contractor found mold inside a wall. Remediation added $15,000 and pushed total improvements to $365,000, past the $350,000 he'd set aside. James covered the overage from personal funds, which is the kind of move that muddies an exchange - the cleaner path would have been to trim other improvements so every dollar stayed inside the QI account.
The buffer is what saved him. He'd aimed to finish well before the Day 180 deadline, and wrapping up on September 12 left real cushion. Had the mold and the HVAC delay both pushed work to the wire, he'd have been in trouble.
What the case shows
An improvement exchange lives or dies on execution, and James's deal shows the pressure points. The replacement property and the improvement plan both have to be settled before Day 45, because the QI builds the exchange around them. The scope has to hold up as capital improvements, the test James cleared before a single tool came out. The contractor has to be willing to bill the QI and wait to be paid, which not all are. Construction runs long, so estimates need slack and the schedule needs a buffer before Day 180. Every dollar moving through the QI account keeps the structure clean; personal money complicates it. And the records - invoices, payments, change orders, completion certificates - have to be complete, because an audit can arrive years later.
Asked whether he'd do it again, James didn't hesitate. The coordination and documentation were heavier than a straight swap, but he ended up with a renovated building throwing off stronger cash flow, funded largely with proceeds that would otherwise have been taxed.
The bottom line
An improvement exchange lets an investor buy a property below their sale price and put the leftover proceeds toward improvements, all inside the 180-day window; for the gain to stay fully deferred, the finished property has to be worth at least what they sold. What makes that achievable is clear planning, a realistic timeline with a buffer, a contractor and QI who can handle the payment structure, and meticulous records.
Investors weighing a value-add deal inside an exchange often work with an advisor who has done improvement exchanges and run the numbers through a deferral calculator before committing, and confirm that their QI and contractor are aligned on timeline and documentation.
For more, see how improvement exchanges work and the 1031 exchange timeline.
Improvement exchanges are more involved than a straight swap, but they let an investor fund improvements with proceeds that would otherwise be partly taxed. Success turns on a clear scope of work, a contractor and QI who can handle the payment structure, and a timeline with room to slip before Day 180.
Frequently asked questions
What is an improvement exchange?
It's a 1031 exchange in which you identify a replacement property that costs less than your net sale proceeds, then use the leftover proceeds to fund capital improvements on it, all within the 180-day window. Structured correctly, the whole exchange is tax-deferred.
How does this work practically?
Your QI holds the sale proceeds and pays the seller, then pays for improvements from the same held funds as the work is completed. Every payment comes from the QI's account, not your own, and the finished property has to be worth at least as much as what you sold.
What's the biggest risk with improvement exchanges?
Contractor delays and cost overruns. Construction is unpredictable, and if the improvements aren't finished by Day 180, or you blow past your proceeds and have to add personal funds, the exchange can fail or end up only partly deferred.
Can I use my own contractors, or do I need the QI to select them?
You can recommend contractors, but the QI pays them directly from the held funds. Part of the QI's job is making sure the work is genuine capital improvements rather than repairs or maintenance, and that the payment trail stays clean.
What qualifies as a capital improvement versus a repair?
Capital improvements add value or extend useful life, like a new roof, an HVAC system, or structural work. Repairs just maintain the current condition, like fixing a leak or patching a wall. The IRS is strict about the line, so your QI and tax advisor should review your scope of work in advance.