Boot in a 1031 Exchange: Cash, Mortgage, and Personal Property Boot Explained

“Boot” is the most expensive word in a 1031 exchange. It is anything of value the investor receives in the exchange that is not like-kind real property. Boot is taxable to the extent received, even when the rest of the exchange qualifies for full deferral. Three forms of boot show up in NNN transactions: cash boot, mortgage boot, and personal property boot. Understanding all three is the difference between a clean exchange and a partially-taxable surprise on the next tax return.

What Boot Is

Section 1031 defers tax only on the value of like-kind real property received in exchange for like-kind real property given up. Anything else the investor receives in the transaction is “boot.” Boot is taxable to the extent of the realized gain, immediately, in the year of the relinquished sale. It is the partial-failure mode of an otherwise-successful 1031.

Three forms of boot occur in real-world 1031 transactions, especially in NNN. This page covers each in detail, the math that determines how much boot is generated, and the structural fixes that eliminate boot before it appears. For the broader framework, see the investment grade 1031 exchange pillar guide.

Cash Boot

Definition. Cash boot is sale proceeds the investor pockets rather than reinvesting in the replacement property. Any cash distributed from the qualified intermediary to the investor at the closing of the replacement property (or any point after the relinquished closing) is cash boot.

How it appears. The investor sells the relinquished property for $4M. The QI receives $4M. The investor closes on a $3.5M replacement property. The remaining $500K sits with the QI after closing and is distributed to the investor. That $500K is cash boot, taxable in the year of the relinquished sale.

The trap. Cash boot can also appear when the investor keeps proceeds for closing costs that should have been deducted at the relinquished closing. If $30K of legal fees, broker commissions, or recording charges were paid by the QI on behalf of the investor (rather than netted out of the relinquished sale), those amounts may be characterized as constructive boot to the investor. The defensive practice is to net all transaction costs out of the closing statements directly, not pull them from the QI’s escrow.

The fix. Trade up in value. Acquire a replacement property of equal or greater value than the relinquished property. Reinvest 100% of the proceeds. If the replacement is smaller, the spread becomes cash boot.

Mortgage Boot

Definition. Mortgage boot, also called “debt relief boot,” is the net reduction in the investor’s mortgage debt between the relinquished and replacement properties. It is easy to miss in NNN transactions because it does not involve any cash changing hands.

How it appears. The relinquished property has a $2.5M mortgage. The buyer of the relinquished property pays off that mortgage at closing. The replacement property is acquired with a $1.5M mortgage. The investor’s debt has decreased by $1M. That $1M reduction is mortgage boot, taxable in the year of the relinquished sale, even though no cash was received.

The math. Net debt relief is the relinquished property’s debt paid off minus the replacement property’s new or assumed debt. Debt relief can be offset by new debt, by additional cash the investor contributes at the replacement closing, or by both. Only net debt relief that is not offset is taxable boot. Taking on more debt than was retired produces no boot.

The fix. Replace the debt that was paid off with new debt, additional cash contributed at the replacement closing, or a combination. If the relinquished property had a $2M mortgage and the investor wants less leverage, adding $2M of outside cash avoids mortgage boot just as well as a new $2M loan. Which is better depends on the investor’s cash, borrowing cost and goals, not on the tax rule.

Personal Property Boot

Definition. Post-TCJA (2017), personal property does not qualify as like-kind for 1031 purposes. Only real property exchanges with real property. If the relinquished or replacement property includes meaningful personal property value (furniture, equipment, vehicles, inventory), that allocation is potentially boot.

How it appears in NNN. A standard NNN purchase often covers only land and building, which are real property, with no operating business or significant equipment changing hands. In that case personal property boot is often not an issue. Confirm the purchase price allocation with your CPA.

Where it does matter. Operating businesses where the buyer is taking on equipment or inventory create personal property boot risk. Common NNN-adjacent scenarios where this comes up:

• Gas stations with C-store inventory. If the purchase price includes the convenience-store inventory at closing, that inventory allocation is personal property and boot.
• Car washes with tunnel equipment. Some car wash purchase agreements bundle the building (real property) with the tunnel equipment (personal property). The equipment portion is potential boot.
• Hotels and operating businesses. FF&E (furniture, fixtures, and equipment) at hotels is personal property. The going-concern value of the operating business itself is also non-real-property and potentially boot.
• Restaurants with kitchen equipment. If the purchase includes the kitchen equipment, that allocation is personal property.

The fix. Allocate purchase price carefully between real property and personal property. The real property portion qualifies for 1031 deferral. The personal property portion is taxable as boot to the extent of recognized gain. For NNN buyers, the cleanest path is to structure the acquisition as land and improvements only, with any operating equipment held in a separate operating entity acquired through other means (cash purchase, separate financing, or seller-financed installment note).

The Two-Part Replacement Test

One shorthand for avoiding boot has two parts:

1. Equal or greater value. Replacement property value at least equal to the relinquished property value, net of selling costs. Trading down generally leaves cash coming out of the exchange or debt relief that is not offset, and either can be taxable boot. Your CPA confirms how it applies to your numbers.
2. Offset the debt paid off. The debt paid off at the relinquished closing must be offset by new or assumed debt on the replacement, additional cash contributed, or both. Otherwise, the unoffset amount is mortgage boot.

The shorthand: buy equal or greater value, reinvest all of the exchange proceeds, and replace the debt paid off with new debt or added cash. Following it, along with the other exchange requirements, generally avoids boot; your CPA confirms the result for your numbers.

When Investors Knowingly Take Boot

Some investors take boot deliberately because the after-tax economics work better than a full 1031. The common scenarios:

• Partial liquidity needs. The investor wants $500K of cash from the sale and is willing to pay tax on $500K of boot to free up that cash. The remaining $3.5M of proceeds completes a partial 1031.
• Debt paydown strategy. The investor wants to reduce overall portfolio leverage and is willing to take mortgage boot on the difference. Net of tax, the lower-leverage portfolio may be worth the boot cost.
• Property class transition. The investor is exiting a high-debt asset class (say, value-add multifamily at 75% LTV) into a lower-debt asset class (NNN at 50% LTV) and the mortgage boot is the cost of the strategic shift.
• Boot offset against losses. The investor has unused capital losses elsewhere in the portfolio. Boot recognized in the 1031 year can be offset by harvested losses.

The decision is purely economic. Calculate the after-tax proceeds under both scenarios (full 1031 vs. partial 1031 with boot) and choose the structure with better after-tax internal rate of return.

How Boot Interacts with Bonus Depreciation on the Replacement Property

The OBBBA permanently restored 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025. For NNN replacement properties, a cost segregation study reclassifies a portion of the building basis into 5-year, 7-year, and 15-year property classes that qualify for 100% bonus depreciation in Year 1.

Related: Gas Station Bonus Depreciation

Importantly, the boot recognized on the relinquished side and the bonus depreciation taken on the replacement side are independent. Boot is recognized as gain in the year of the relinquished sale. Bonus depreciation is taken in the year the replacement property is placed in service (often the same calendar year). For investors taking deliberate boot, the bonus depreciation deduction can offset some or all of the boot recognition. A $500K cash boot recognized as long-term gain in the year of sale can be partially offset by, for example, a $400K bonus depreciation deduction on a cost-segregated NNN replacement property.

This pairing can help most when the replacement has substantial short-life basis the investor actually owns, such as a qualifying gas station or a car wash where the equipment conveys. The deduction is smaller than the purchase price suggests: in an exchange the replacement’s basis generally carries over from the property sold, land is not depreciable, and for used property generally only added basis qualifies for bonus depreciation. The deduction also offsets boot income only to the extent the passive activity rules allow. Model it before relying on it. See cost segregation for NNN properties for the full mechanics.

Common Boot Mistakes

1. Forgetting mortgage boot when the replacement has lower debt. Many investors focus only on the equity reinvestment and ignore the debt side. A clean equity reinvestment with a smaller mortgage on the replacement still creates mortgage boot.
2. Misclassifying closing costs. Qualifying exchange expenses, such as brokerage commissions, title and escrow fees, legal fees and transfer taxes, can generally be paid from exchange funds without creating boot. Non-exchange items, such as loan fees, prorated rent, security deposits and property taxes, can create boot if paid with exchange funds. The classification, not who writes the check, controls; have the QI and tax adviser review each line of the closing statements.
3. Allocating personal property in operating-business NNN purchases without separate structures. Car wash and gas station acquisitions especially require careful purchase price allocation between real and personal property.
4. Failing to plan for net debt reduction. If the relinquished property is mortgaged and the investor wants an unleveraged replacement, the mortgage payoff becomes boot unless the investor contributes enough additional cash to offset it. Plan the debt and cash side of the replacement closing in advance.
5. Not consulting the CPA before a partial-1031 strategy. Deliberate boot strategies require careful tax modeling. Talk to the CPA before signing PSAs that lock in a partial-1031 structure.

For Owners Considering a Sale: Pre-Listing Boot Analysis

Investment Grade Income Property, LP represents investors on both acquisitions and dispositions of investment grade NNN nationally. Through Broker of Record co-listing partnerships in all 50 states, we list properties on behalf of sellers, source qualified 1031 capital, and represent owners across the full lifecycle of a transaction.

For owners contemplating a sale, the most valuable conversation happens before the listing agreement is signed. We model the disposition scenarios on your specific property (sell outright, full 1031, partial 1031 with deliberate boot, refinance and hold, or contribute to UPREIT), and project the after-tax proceeds under each path. Where mortgage boot is unavoidable because of asset class differences between the relinquished and target replacement, we model the boot recognition against potential bonus depreciation on the replacement side and calculate the net effect.

Where a sale is the path forward and the owner plans a 1031, we represent on both legs of the exchange under one coordinated engagement: listing the relinquished property and sourcing the replacement property. There is no fee for the initial scenario analysis. See contact Investment Grade.

Frequently Asked Questions: Boot in 1031 Exchanges

Related 1031 Resources

• Investment Grade 1031 Exchange: The Complete 2026 Guide
• The 1031 Exchange 45-Day Rule
• The 1031 Exchange 180-Day Rule
• The Three 1031 Identification Rules Compared
• 1031 Exchange Into Bonus Depreciation NNN Properties
• Cost Segregation for NNN Properties
• The CPA’s Guide to Investment Grade 1031 Exchanges
• Contact Investment Grade: Acquisitions and Dispositions

This page is a comprehensive educational reference and is not legal, tax, or investment advice. The 1031 exchange has strict procedural requirements, and execution should involve a qualified intermediary, a CPA, and where applicable, a tax attorney. Investment Grade Income Property, LP represents real estate investors on both acquisitions and dispositions and is not a tax advisor, qualified intermediary, or law firm.