In an improvement exchange, only improvements completed and transferred to the client by Day 180 count toward exchange value. Advisors have to stress-test the timeline against contractor delays, permitting issues, and scope changes, and make sure improvement budgets carry realistic contingencies.
What an Improvement Exchange Does
Every 1031 exchange runs on a 180-day clock. An improvement exchange spends part of that clock on a construction site, which is where the trouble usually starts.
The mechanics are simple enough. A client buys a replacement property for less than the exchange requires, improves it up to full exchange value, and defers tax on the whole amount. Buy a building that needs work, finish the work inside the 180-day window, and the improvement costs count toward the value the client has to reinvest.
The catch is what "finished" means. Only improvements placed in service by Day 180 count, and placed in service here means finished and transferred to the client. Not started. Not substantially complete. In the client's hands. The IRS does not extend the deadline for construction delays.
What Counts Toward Exchange Value
The value the client must hit is not the purchase price. It is the purchase price plus the improvements that get done in time, and every dollar spent lands on one side of that line or the other. The table below is the sorting rule.
Category | Counts Toward Exchange Value? | Examples |
|---|---|---|
Capital improvements completed by Day 180 | Yes | Roof replacement, HVAC installation, electrical upgrades, plumbing, flooring, windows, fixtures, tenant buildout |
Repairs and maintenance | No | Fixing existing elements rather than replacing them |
Cosmetic changes that do not increase value | No | Paint color changes without renovation |
Soft costs (permits, professional fees) | Maybe | Only if the contract clearly capitalizes these as part of the improvement |
Work not completed by Day 180 | No | Becomes boot or post-exchange expense |
Improvements paid after the exchange closes | No | Separate from the exchange structure |
Exchange Value Calculation
On a real deal the arithmetic is straightforward:
Line Item | Amount |
|---|---|
Relinquished property sale price | $2,000,000 |
Replacement as-is purchase price | $1,700,000 |
Improvement costs (completed by Day 180) | $350,000 |
Total exchange value | $2,050,000 |
Boot position | $0 (fully deferred) |
Finish everything and the client defers tax on the full $2,050,000. Miss the mark and the shortfall is taxable. If only $280,000 of improvements are completed by Day 180, total exchange value drops to $1,980,000, and the $20,000 gap becomes boot, the taxable slice of the deal, leaving a small gain.
Timeline Mechanics
Two structures reach the same finish line with very different amounts of runway.
The Delayed Improvement Exchange
Here the client buys the property first and builds second. Identification and closing eat into the front of the window, so construction gets whatever is left.
Step | Timing | Activity |
|---|---|---|
Identify replacement property | By Day 45 | Standard identification rules apply |
Acquire replacement property | By Day 80 | Close on as-is property |
Complete improvements | Day 80-180 | Contractors execute scope |
Construction window | ~100 days | Feasible for smaller projects only |
The Reverse Improvement Exchange
Here a third party takes title first so the work can start almost immediately.
Step | Timing | Activity |
|---|---|---|
EAT acquires replacement property | Day 1 | Exchange Accommodation Titleholder takes title |
Construction begins | Day 5 | Contractors start immediately under EAT authority |
Construction complete | Day 140 | All work finished, inspections passed |
Relinquished property sale closes | Day 160 | QI coordinates transfer |
Improved property transfers to client | Day 160 | Exchange closes |
Construction window | ~135 days | Realistic for complex projects |
That third party is the Exchange Accommodation Titleholder, or EAT, which holds the improved property until the client's own sale closes and the exchange can settle. Because construction begins on Day 5 instead of Day 80, the reverse structure hands most projects roughly a month more building time.
Five Things to Lock Down Before Day 1
The window is too short to improvise. Before the EAT takes title, settle all five of these.
1. Detailed Scope of Work
Itemize every improvement with a price, a timeline, and a name attached to it:
Item | Specification | Cost | Duration |
|---|---|---|---|
Roofing | Complete tear-off, new asphalt shingles | $X | X weeks |
HVAC | Remove 2 old units, install 2 new 5-ton units | $X | X weeks |
Flooring | Remove carpet, install 8,000 sq ft luxury vinyl plank | $X | X weeks |
Painting | Interior repaint all tenant spaces | $X | X weeks |
Vague scopes like "cosmetic updates" or "bring up to current standards" invite scope creep and missed deadlines.
2. Fixed-Price or GMP Contract
A cost-plus contract passes every overrun to the owner and gives the contractor no reason to hurry. A fixed-price or guaranteed maximum price (GMP) contract caps the number, and the right clauses move the schedule risk onto the contractor:
- Performance bonds (guaranteeing the contractor completes the work)
- Payment bonds (guaranteeing subcontractors and suppliers are paid)
- Liquidated damages clause (for every day past deadline, contractor pays $X)
3. Realistic Budget with Contingency
Build in 10-15% contingency and allocate it on paper, not in your head. A $400,000 scope becomes a $440,000-$460,000 budget.
4. Contractor Vetting
Before hiring, confirm each of these:
5. Permitting Timeline
Permitting can quietly consume the whole schedule, so research it before Day 1:
Timeline Stress Test
Before approving the exchange, run the schedule against the things that reliably go wrong:
Question | Method |
|---|---|
Can the project finish by Day 170 (10-day buffer)? | Build a Gantt chart with task durations and dependencies |
What is on the critical path? | Identify longest lead-time items (structural engineering reports, custom materials) |
What if permits take 4 weeks instead of 2? | Model delay scenarios |
What if materials are on backorder? | Confirm availability before Day 1; pre-order critical items |
What if an inspection fails? | Build rework time into the schedule |
Does the client have construction management capability? | If not, hire a professional project manager or GC |
Common Failure Points
These failures are common, and each has a standard defense:
Failure | Cause | Prevention |
|---|---|---|
Permitting delays | Jurisdiction has 12-week backlog; only 8 weeks remain for work | Obtain building department feedback before Day 1; reduce scope to non-permit work; hire expeditor |
Contractor walkoff | Contractor takes a larger job and deprioritizes | Fixed-price contract with performance bond and liquidated damages clause |
Scope creep | Client or GC adds work mid-project, pushing past Day 180 | Lock scope in writing; require formal change orders; reject any change that extends past Day 170 |
Material shortages | HVAC units or flooring on backorder | Confirm material availability and order before Day 1 |
Weather delays | Exterior work delayed by rain, snow, or extreme heat | Schedule exterior work early; build weather contingency days |
Hidden structural problems | Water damage, foundation issues, hazardous materials discovered during construction | Conduct pre-acquisition inspection and Phase I environmental assessment; include contingency budget |
When an Improvement Exchange Doesn't Fit
Sometimes the honest planning answer is that the deal doesn't suit the structure:
Condition | Reason |
|---|---|
Construction window less than 60 days | Insufficient time for meaningful improvements |
Improvement budget exceeds $500,000 or involves structural/mechanical changes | Major renovations require 6-18 months; 180 days is unrealistic |
Client has no construction management experience and will not hire a GC/PM | High risk of mismanagement, delays, and disputes |
Property is difficult to value or finance post-improvement | Lenders may resist; appraisal risk |
Local contractor market is tight | Cost and quality compromises; scheduling unreliable |
Key Takeaways
An improvement exchange can defer tax on the purchase price and the improvements together. Whether it works comes down to planning discipline:
- Only improvements completed by Day 180 count toward exchange value.
- A reverse structure widens the construction window because title transfers up front.
- Lock scope, budget, and contractor before Day 1.
- Stress-test the timeline against permitting, supplier, and weather risk.
- Keep a 10-day buffer before the Day 180 deadline.
For the underlying mechanics, see our guide to reverse 1031 exchanges.
Improvement exchanges are tax-efficient when a below-market replacement property plus improvements reaches the required exchange value, but only when advisors and clients are realistic about construction timelines and build in 10-15% contingency for the delays that arrive anyway.
Frequently asked questions
What improvements count toward the exchange value?
Only improvements completed and transferred to the client, placed in service, by the end of Day 180. That covers construction, renovation, build-out, fixtures, and structural work. Soft costs like architectural fees, engineering, permitting, and project management may or may not be capitalizable as part of the improvement cost, depending on the facts, so coordinate with the client's tax counsel to confirm. Improvements made after Day 180 do not count and are treated as boot or basis.
What happens if improvements aren't completed by Day 180?
Incomplete improvements do not count toward exchange value. If $350,000 is budgeted but only $280,000 is finished by Day 180, only $280,000 counts. The remaining $70,000 is treated as boot, the taxable cash the client paid out of pocket, which can reduce or eliminate the deferral. In severe cases, if improvements fall far short, total property value can drop below the relinquished property's value, forcing additional boot or a second replacement property.
Can the client manage the construction themselves?
Generally yes, but with caution. If the client is in the construction business and acts as the contractor, the improvements can be treated as inventory or held-for-sale rather than real property improvements, which disqualifies the exchange. Even outside that trap, self-managing a large project adds risk: the client owns schedule adherence, budget control, and contractor performance. For most clients, a professional general contractor working under a fixed-price contract with performance bonds is safer and easier to defend.
How does the EAT handle contractor payments?
In a reverse exchange, where the EAT parks the replacement property during construction, the EAT or the client contracts with the general contractor. Draw payments are released as work progresses, usually tied to lender inspections and milestones. The client reimburses the EAT for draws, or the EAT carries construction financing that funds the draw schedule. In a delayed exchange, the client acquires the property and manages construction directly, paying the contractor themselves. Clear draw schedules and milestones in the contract keep progress aligned with the 180-day deadline.
Is an improvement exchange always combined with a reverse exchange?
No. It can run as a delayed exchange when the replacement property is identified and acquired early enough to leave time for improvements before Day 180. But when the client wants a below-market property specifically to improve, one that may not be on the market yet and needs work, a reverse exchange is often used to hold it during the improvement period. There, the EAT acquires the as-is property, the improvements are made, and the finished property transfers to the client before Day 180.