A partial 1031 exchange allows real estate investors to defer taxes on a portion of their sale proceeds while accessing the remainder as cash or reducing debt obligations. Unlike a full 1031 exchange -where 100% of the proceeds are reinvested into replacement property of equal or greater value- a partial exchange lets investors meet short-term financial needs without abandoning the long-term benefits of tax deferral entirely. The portion not reinvested is called "boot," and only that portion becomes taxable.
Many investors assume a 1031 exchange is all or nothing. It is not. Understanding how partial exchanges work and how they compare to full exchanges can open up planning options that are otherwise overlooked.
A 1031 exchange, named after Section 1031 of the Internal Revenue Code, allows investors to defer capital gains and depreciation recapture taxes when selling an investment property by reinvesting the proceeds into like-kind replacement property. When executed correctly, a full exchange defers 100% of the tax liability. A partial exchange occurs when one or more of the reinvestment requirements is not fully met- and while some tax becomes due, the remainder of the transaction may still qualify for deferral.
The distinction comes down to three rules. For full deferral, the replacement property must be equal to or greater in value than the relinquished property. All net sale proceeds must be reinvested. And any mortgage paid off during the sale must be replaced with equal or greater debt on the new property, or offset with additional cash from outside the exchange. When any of these conditions fall short, the difference creates taxable boot.
It is important to understand that receiving boot does not invalidate the exchange. The exchanger simply ends up with a "partially tax deferred exchange" rather than a "fully tax deferred exchange." Taxes apply only to the boot received, up to the amount of the total realized gain. Everything else remains deferred.
Key Point: A partial exchange preserves meaningful tax deferral even when full reinvestment is not possible or not desired.
Boot is any non-like-kind property received during a 1031 exchange. In practice, boot most commonly appears as cash kept from the sale proceeds, debt that is reduced without being replaced, or property that does not qualify as like-kind. Receiving boot does not kill the exchange- it simply creates a taxable event on that specific portion.
Boot is taxed as capital gains income and may also trigger depreciation recapture, state capital gains tax, and the Net Investment Income Tax (NIIT) depending on the investor's situation. The taxable amount is limited to the lesser of the boot received or the total realized gain. If an investor's realized gain is smaller than the boot received, taxes are capped at the gain, not the full boot amount.
Careful planning with a Qualified Intermediary (QI) and tax advisor before closing is essential. Boot can sometimes be created unintentionally. For example, when closing costs are allocated incorrectly or when the investor does not recognize that a reduction in debt creates the same tax consequence as taking cash.
Key Point: Boot is taxed only up to the amount of the realized gain, and understanding what triggers it is the key to planning a partial exchange effectively.
Taking Cash at Closing
An investor may choose to retain a portion of the sale proceeds rather than reinvesting everything into the replacement property. That retained cash becomes taxable boot immediately. The rest of the proceeds can still move through the exchange and qualify for deferral.
Example: An investor sells a rental property for $1,000,000 and wants to keep $150,000 for personal use. The $150,000 is taxable boot. The remaining $850,000 can still be used to complete a 1031 exchange into qualifying replacement property.
Buying Down in Value
If the replacement property costs less than the relinquished property's sale price, the difference is treated as boot. The investor does not have to match the full sale price, but the gap between the two values will be taxable.
Example: An investor sells for $1,000,000 and acquires replacement property for $800,000. The $200,000 difference is taxable boot, subject to capital gains and potential depreciation recapture.
Not Replacing the Debt
This one catches investors off guard. If the relinquished property carried a $400,000 mortgage and the replacement property carries no mortgage, the $400,000 in relieved debt is treated as boot — even if the investor did not receive any cash at closing. To avoid this, the investor must either take on equivalent debt on the new property or contribute additional cash from outside the exchange to offset the debt relief.
Example: An investor sells a property for $900,000 with a $350,000 mortgage and buys a $900,000 replacement property with no financing. The $350,000 in unresolved debt creates taxable boot unless compensated with cash from outside the exchange.
Key Point: Debt relief is treated identically to cash boot — investors must account for it or face an unintended tax consequence.
Taxes in a partial exchange apply only to the boot received, not to the total transaction. The taxable boot may be subject to:
Federal capital gains taxes (0%, 15%, or 20% depending on income)
Depreciation recapture tax (capped at 25% for real property)
State capital gains taxes, where applicable
Net Investment Income Tax of 3.8%, if applicable
To illustrate the math, consider the following example. An investor purchased a rental property 10 years ago for $300,000, claimed $100,000 in depreciation deductions over time, and recently sold it for $500,000.
The adjusted basis is calculated as: $300,000 (purchase price) minus $100,000 (depreciation claimed) = $200,000 adjusted basis.
The total realized gain is: $500,000 (sale price) minus $200,000 (adjusted basis) = $300,000.
If the investor completes a full 1031 exchange, the entire $300,000 gain is deferred. If the investor retains $80,000 in cash boot, only that $80,000 is taxable- at applicable rates -while the remaining gain is still deferred through the exchange.
Key Point: Running the numbers with your tax advisor before closing is not optional. Knowing your adjusted basis determines exactly how much of a partial exchange will cost you.
The right answer depends on the investor's personal situation, and there is no single rule that fits everyone. A partial exchange might be the right move in a number of specific circumstances. Consider it when:
You need liquidity for a significant personal expense (medical costs, education, estate planning)
You want to reduce leverage without triggering a full tax event
You are unable to locate replacement property that matches the full value of your relinquished property
You have tax loss carryforwards or other deductions that could offset the boot tax liability
You are moving toward a simpler portfolio and want to access equity built over many years
It is also worth considering that holding appreciated equity in real estate indefinitely is not always the most rational financial decision. There are cases where accessing some of that equity -paying the tax, and deploying the capital elsewhere- produces better outcomes than deferring everything. That calculation is specific to each investor and should be worked through with a CPA.
On the other hand, if too much cash is retained or significant debt is left unreplaced, the taxable portion of the transaction can outweigh the benefit of completing the exchange at all. Before proceeding, investors should compare the net after-tax position in both scenarios.
Key Point: A partial exchange may be worth pursuing when the remaining deferred gain is substantial enough to justify the structure — and when the boot serves a clear financial purpose.
For investors whose goal is full deferral, there are practical ways to avoid triggering boot inadvertently:
Do not take cash at closing; if you need liquidity, consider a cash-out refinance on the replacement property after the exchange closes as a separate transaction
Offset equity reduction by contributing additional cash from outside the exchange to meet the debt replacement requirement
Consider acquiring a fractional interest in additional replacement property — such as a Delaware Statutory Trust (DST) — to make up any value gap when suitable single-asset replacement properties are not available
Review your overall tax profile for the year before closing; carryforward losses or other deductions may reduce the actual cost of accepting some boot
DSTs, in particular, are a useful tool here. Because they allow investors to acquire fractional interests in institutional-quality properties with relatively low minimum investments, they can help an exchanger "top off" a partial exchange to reach full value replacement when a single whole property does not match the numbers exactly.
Key Point: Planning before closing — not after — is the only reliable way to avoid creating unintended boot and manage the tax outcome of your exchange.
A partial 1031 exchange allows investors to defer taxes on a portion of sale proceeds while accessing the rest as cash or reducing debt
Boot is the taxable portion of a partial exchange- it may include cash received, debt not replaced, or a trade-down in value
Receiving boot does not disqualify the exchange; only the boot amount is subject to tax, capped at the realized gain
The three rules for full deferral are: replace equal or greater value, reinvest all proceeds, and replace all debt or offset with cash
DSTs and other fractional ownership structures can help investors bridge a value gap and achieve full deferral when whole properties fall short
Always consult a tax advisor and Qualified Intermediary before closing to understand the full financial impact of your exchange structure
For more information, feel free to reach out to our office for a consultation. You can also download our eBook HERE.
Q1: Is a 1031 exchange all or nothing? A1: No. Investors can complete a partial 1031 exchange and still defer taxes on the portion of proceeds that are reinvested into qualifying replacement property. Only the untaxed “boot"-cash retained, debt reduced, or trade-down in value -is subject to capital gains and depreciation recapture taxes. The rest of the transaction continues to qualify for deferral under Section 1031 of the Internal Revenue Code.
Q2: What exactly is taxable in a partial 1031 exchange? A2: The taxable portion is the boot received, which may include cash kept at closing, the value of debt relieved without replacement, or the shortfall when replacement property costs less than the relinquished property. This boot may be subject to federal capital gains tax, depreciation recapture tax (up to 25%), state capital gains taxes where applicable, and the 3.8% Net Investment Income Tax depending on the investor's income. The taxable amount is limited to the lesser of the boot received or the total realized gain.
Q3: Does taking cash at closing disqualify a 1031 exchange? A3: No. Taking cash at closing converts that portion of the transaction into taxable boot, but the rest of the exchange can still qualify for deferral. Investors who need liquidity but also want to preserve some tax deferral should work with a Qualified Intermediary before closing to understand exactly how much they can retain and what the resulting tax liability will be.
Q4: How does debt affect a partial 1031 exchange? A4: Debt relief is treated the same as cash boot. If an investor sells a property with a $400,000 mortgage and acquires replacement property with no mortgage — without contributing additional cash to offset the difference- that $400,000 becomes taxable boot. To avoid this, investors must either take on equivalent debt on the replacement property or inject additional cash from outside the exchange equal to the debt reduced.
Q5: When should an investor consider a partial exchange over a full exchange? A5: A partial exchange may make sense when the investor has a legitimate need for liquidity, wants to reduce leverage, or cannot locate replacement property that matches the full value of what was sold. It may also be appropriate when the investor has carryforward tax losses that can offset the boot liability, or when the cost of accessing equity is outweighed by the personal or financial benefit of doing so. Investors should model both scenarios with their CPA before deciding.