You can do everything else right in a 1031 exchange and still owe tax on part of it — and that taxable part is called boot. Boot is any value you receive that isn't like-kind real property, most often cash you keep or debt you fail to replace. It doesn't disqualify the exchange; it's simply the portion that remains taxable. Understanding where boot comes from, how it's calculated and taxed, and how to design it out is the difference between partial and full deferral — and it's one of the most important and most misunderstood concepts in the entire 1031 process. This guide covers boot from every angle.
What Is Boot?
Boot is any non-like-kind value you receive in an exchange. In a perfect, fully deferred exchange, you trade entirely into like-kind real property of equal or greater value — nothing else changes hands. Boot is whatever else you walk away with: cash, debt relief, or other non-like-kind property.
The word itself comes from the old phrase "to boot," meaning something given in addition. In a 1031 exchange, boot is the something extra you receive beyond the like-kind property, and the tax code treats it as the part of the transaction that looks like a cash-out rather than a continuation of your investment.
Critically, receiving boot does not blow up the exchange. The like-kind portion still qualifies for deferral; only the boot is taxed. This is what makes a partial exchange — deliberately taking some boot — a valid choice in some situations, as long as you understand the tax consequence.
Why Boot Exists
Boot is the natural consequence of the equal-or-greater-value rule. To fully defer, you must reinvest all of your equity and acquire replacement property of equal or greater value, replacing any debt you paid off. Boot is simply the measure of how far you fall short of that standard.
If you keep some of your sale proceeds, you've cashed out that much — and that cash-out is boot. If you reduce your debt without adding cash, you've effectively pocketed the difference in the form of debt relief — also boot. The rule exists because Section 1031 defers tax only to the extent you genuinely continue your investment; to the extent you pull value out, you've realized gain.
Understanding boot as the flip side of the value rules makes it predictable. Anytime you receive value that isn't reinvested into like-kind property, expect boot — and plan accordingly if you want full deferral.
Cash Boot
Cash boot is the most straightforward kind: net sale proceeds you don't reinvest. If you sell for $600,000, net $400,000 of equity after paying off debt, and reinvest only $350,000, the $50,000 you kept is cash boot.
Cash boot can arise deliberately (you want to pull some money out) or by accident (you bought a less expensive replacement and the qualified intermediary released the leftover funds to you at the end of the exchange period). Either way, it's taxable up to the amount of your gain.
The lesson is to plan your reinvestment precisely. If full deferral is the goal, reinvest all of your equity — a securitized option like a DST helps because you can invest an exact dollar amount rather than being left with leftover cash.
Mortgage Boot
Mortgage boot — also called debt-relief boot — is subtler and catches more careful investors. It's the amount by which the debt you paid off on the relinquished property exceeds the debt you take on (or cash you add) on the replacement property.
If your old property had a $300,000 mortgage and your new property has only a $200,000 loan, you've been relieved of $100,000 of debt. Unless you contribute $100,000 of additional cash, that $100,000 is mortgage boot — taxable even though you never received a dollar of it directly.
The IRS treats debt relief as value received because being freed of a liability is economically equivalent to receiving cash. This is why "replace your debt" is as important as "reinvest your equity" — and why it's the rule investors most often overlook.
How Boot Is Taxed
Boot is taxable up to the amount of your realized gain. If you have a $300,000 gain and receive $50,000 of boot, that $50,000 is generally taxed; the remaining deferral is preserved. If your boot exceeds your gain, you're taxed only up to the gain — you can't be taxed on more gain than you actually have.
The character of the boot's tax matters too. Boot is generally taxed first as the highest-rate component of your gain — meaning depreciation recapture (up to 25%) is recognized before lower-rated capital gain. So a modest amount of boot can be taxed at the recapture rate rather than the capital gains rate, making it costlier than you might expect.
Higher-income taxpayers may also owe the 3.8% net investment income tax on recognized boot, and state tax can apply. The bottom line: boot isn't a rounding error — it's real, sometimes high-rate, tax, which is why avoiding it (when full deferral is the goal) is worth the planning.
The Boot Netting Rules
Cash and debt interact under netting rules that can work for or against you. Generally, you can offset mortgage boot (debt relief) by adding cash or taking on new debt — that's the whole point of debt replacement. But you cannot offset cash boot with debt: if you take cash out, adding more debt on the replacement doesn't cancel the cash boot.
Put simply, paying additional cash into the exchange can offset debt relief, but increasing your debt cannot offset cash you've pulled out. This asymmetry surprises investors who assume the two ledgers cancel symmetrically.
The practical takeaway is to handle cash and debt deliberately. To fully defer, reinvest all equity (no cash boot) and replace all debt with new debt or offsetting cash (no mortgage boot). When in doubt, your CPA can run the netting for your specific numbers before you close.
Common Sources of Boot
Boot creeps in through several common channels. Buying a less expensive replacement property leaves leftover cash (cash boot) and often less debt (mortgage boot). Taking on a smaller loan than you paid off creates mortgage boot. Pulling cash out at closing for any purpose creates cash boot.
Less obvious sources include using exchange funds to pay non-transaction costs (some closing costs are fine, but paying off unrelated obligations can be boot), receiving non-like-kind property such as personal property bundled into the deal, and seller-financing or other consideration that isn't like-kind real estate.
Even prorated rents, security deposits, and certain credits at closing can create small amounts of boot if handled incorrectly. A qualified intermediary and CPA experienced with exchanges know how to structure the closing to minimize these incidental sources.
Worked Example: Full vs. Partial Deferral
Suppose you sell for $600,000 with a $200,000 mortgage, leaving $400,000 of equity, and your gain is $350,000. Scenario A (boot): you buy a $500,000 replacement with a $100,000 loan. You've kept $100,000 in cash (cash boot) and dropped $100,000 of debt (mortgage boot) — roughly $200,000 of taxable boot, recognized up to your gain and taxed partly at the recapture rate.
Scenario B (zero boot): you buy a $600,000 replacement with a $200,000 loan, reinvesting all $400,000 of equity and replacing all $200,000 of debt. There's no boot, and the entire $350,000 gain is deferred.
The two scenarios differ only in how you structured the replacement. Same sale, same gain — but one triggers $200,000 of taxable boot and the other defers everything. Figures are illustrative, but the structure is exactly where full deferral is won or lost.
- Boot is non-like-kind value received — cash kept or debt not replaced.
- It's taxable up to your gain, often first at the depreciation-recapture rate.
- Reinvest all equity and replace all debt to structure a zero-boot exchange.
Strategies to Avoid Boot
Avoiding boot comes down to satisfying both ledgers: equity and debt. Reinvest all of your net equity (no cash left over), acquire replacement property of equal or greater value, and replace all the debt you paid off — with new financing or by adding offsetting cash.
Plan the numbers before you close, not at the table. Know your equal-or-greater-value target and your debt-replacement target in advance, and shop for replacement property that lets you hit both. A leveraged DST is especially useful because its pre-arranged, non-recourse debt replaces your leverage automatically, and you can invest a precise dollar amount to reinvest all your equity.
If you're combining several replacement properties, run the totals across all of them. The goal is for your combined acquisition value, equity reinvested, and debt assumed to meet or exceed what you relinquished — with no leftover cash and no unreplaced debt.
Intentional (Partial) Exchanges
Sometimes taking boot is a deliberate, sensible choice. A partial exchange lets you defer most of your gain while pulling out some cash — for example, to fund a personal need or rebalance your portfolio. You defer the reinvested portion and pay tax only on the boot.
This is a legitimate strategy when you genuinely want liquidity and accept the tax on the cash you take. The key is to go in with eyes open: know that the boot will be taxed (often at the recapture rate first), and decide consciously rather than discovering the tax after the fact.
If you're considering a partial exchange, model the after-tax outcome with your CPA. Sometimes deferring everything and accessing liquidity another way (such as a later refinance of the replacement property) is more efficient than taking taxable boot now.
Boot and DSTs
Delaware Statutory Trusts are one of the cleanest tools for avoiding boot, for two reasons. First, you can invest a precise dollar amount, so you can reinvest exactly your remaining equity with no leftover cash — eliminating cash boot. Second, leveraged DSTs carry pre-arranged, non-recourse debt at the trust level, so you can match your old debt without applying for a new loan, eliminating mortgage boot.
This precision is why DSTs are often used to "top off" an exchange. If a direct replacement property leaves you with leftover equity or unreplaced debt, a DST can absorb the exact remaining amount and supply the needed leverage, closing the gap that would otherwise be boot.
DSTs are sold only to accredited investors via private placement memorandum and are speculative, illiquid securities — but for the specific problem of hitting equal-or-greater value and debt replacement exactly, they're an unusually effective solution.
Boot Mistakes to Avoid
The classic boot mistakes are all avoidable. Forgetting to replace debt is the most common — investors reinvest their equity but take a smaller loan, creating mortgage boot they didn't anticipate. Buying a cheaper replacement and not realizing the leftover cash and reduced debt are both boot is another frequent error.
Assuming that adding more debt offsets cash you pulled out is a netting mistake — it doesn't. Using exchange funds to pay off unrelated obligations or to cover costs that aren't proper exchange expenses can also create boot. And leaving leftover proceeds with the QI that get released to you at the end is cash boot many forget about.
The remedy is the same in every case: plan the value and debt math before closing, with your CPA and QI, so you know exactly what you must reinvest and replace to reach zero boot — or so you take boot deliberately and knowingly if that's your choice.
Boot in Special Situations
Beyond the everyday cash-and-debt cases, boot can arise in several special situations worth knowing. Seller financing is one: if you take back a note from the buyer of your relinquished property, that note is generally non-like-kind consideration and can be treated as boot unless it's handled carefully within the exchange structure.
Non-like-kind property bundled into a deal is another. If your replacement includes personal property — furniture, equipment, or other items that aren't real property — the value attributable to those items is boot, since only real property is like-kind since 2017. Allocating value carefully between real and personal property at closing matters.
Excess borrowing can also create unexpected results: while taking on more debt than you had isn't itself boot, pulling cash out of the exchange through that borrowing can be. And in related-party or multi-property exchanges, the netting of cash and debt across several properties can produce boot in ways that aren't obvious without running the full calculation.
Each of these is manageable with planning. The common thread is that boot appears whenever you receive value that isn't reinvested into like-kind real property — so identifying every form of consideration in your transaction, and structuring around the non-like-kind pieces, is how you keep an exchange fully deferred. Your CPA and qualified intermediary are essential here, because these situations are exactly where boot hides.
Reporting Boot on Form 8824
Boot is reported on IRS Form 8824, the form for like-kind exchanges, which calculates your realized gain, the recognized gain (the taxable boot), and your basis in the replacement property. The form walks through the netting of cash and debt and the gain recognized up to the boot amount.
Because the character of the recognized gain matters — recapture first, then capital gain — your CPA ensures the boot is taxed correctly and that your carryover basis reflects the partial recognition. Errors here can misstate both your current tax and your future basis.
Keep the documentation that supports the calculation: closing statements showing values and debt on both legs, the QI's accounting of funds, and any cash released to you. Accurate reporting closes out the exchange correctly and sets your basis for whatever comes next.
Frequently Asked Questions
What is boot in a 1031 exchange?
Boot is any non-like-kind value you receive — typically cash you keep (cash boot) or debt relief you don't replace (mortgage boot). It doesn't disqualify the exchange but is taxable up to the amount of your gain.
What's the difference between cash boot and mortgage boot?
Cash boot is sale equity you don't reinvest — money you keep. Mortgage boot is debt relief — the amount by which the debt you paid off exceeds the debt or cash you put on the replacement. Both are taxable.
How is boot taxed?
Boot is taxable up to the amount of your realized gain, and it's generally taxed first as the highest-rate component — depreciation recapture (up to 25%) before lower-rated capital gain. Higher-income taxpayers may also owe the 3.8% NIIT, plus any state tax.
How do I avoid boot in a 1031 exchange?
Reinvest all your equity, acquire replacement property of equal or greater value, and replace all the debt you paid off — with new financing or offsetting cash. A leveraged DST helps by supplying matching debt and letting you invest a precise amount with no leftover cash.
Does taking boot disqualify my exchange?
No. Receiving boot doesn't blow up the exchange — the like-kind portion still qualifies for deferral, and only the boot is taxed. This is why a partial exchange (deliberately taking some boot) is a valid choice.
Can I offset cash boot by taking on more debt?
No. The netting rules are asymmetric: adding cash can offset debt relief (mortgage boot), but increasing your debt cannot offset cash you've pulled out. Cash boot stands on its own once you take cash.
What is mortgage boot and how is it triggered?
Mortgage boot is debt relief — triggered when the debt you paid off exceeds the debt (or offsetting cash) on your replacement property. For example, paying off a $300,000 loan and taking only a $200,000 loan creates $100,000 of mortgage boot unless you add $100,000 of cash.
Is boot always taxable?
Boot is taxable up to the amount of your realized gain. If you have gain and receive boot, that boot is generally taxed while the rest of the exchange stays deferred. If you somehow have no gain, boot may not be taxed, but that's uncommon in an appreciated-property exchange.
What is a partial 1031 exchange?
A partial exchange is one where you deliberately take some boot — for example, pulling out cash for a personal need — while deferring the rest of the gain. You defer the reinvested portion and pay tax on the boot. It's a legitimate choice when you want liquidity and accept the tax.
How do DSTs help avoid boot?
A DST lets you invest a precise dollar amount (eliminating leftover-cash boot) and, if leveraged, supplies pre-arranged non-recourse debt that replaces your old leverage (eliminating mortgage boot). DSTs are often used to 'top off' an exchange and close the exact gap that would otherwise be boot.
Are closing costs considered boot?
Many ordinary transaction closing costs paid from exchange funds are not treated as boot, but using exchange funds for non-transaction expenses or to pay unrelated obligations can create boot. Your QI and CPA structure the closing so legitimate costs don't inadvertently generate boot.
What happens to leftover exchange funds?
If you don't reinvest all your proceeds, the qualified intermediary releases the leftover cash to you at the end of the exchange period, and it's taxable cash boot up to your gain. To avoid this, reinvest all equity — a DST lets you invest the exact remaining amount.
How is boot reported to the IRS?
On Form 8824, which calculates your realized gain, the recognized (taxable) gain equal to the boot, and your carryover basis in the replacement property. Your CPA ensures the recognized gain's character (recapture first) and your basis are correct.
Can boot be taxed at a higher rate than capital gains?
Yes. Boot is generally recognized first as depreciation recapture, taxed up to 25%, which is higher than the long-term capital gains rate. So a modest amount of boot can be costlier than you'd expect if much of your gain is recapture.
Should I ever take boot on purpose?
Sometimes. If you genuinely want liquidity, a partial exchange lets you take cash while deferring the rest. The key is to decide consciously, model the after-tax result with your CPA, and compare it with deferring everything and accessing liquidity another way, such as a later refinance.
Does adding my own cash to the exchange help?
Yes. Adding cash can offset debt relief (mortgage boot) and help you reach equal-or-greater value, supporting full deferral. Many investors contribute additional cash to replace debt they don't want to carry as new financing.
Is seller financing considered boot?
It can be. If you take back a note from the buyer of your relinquished property, that note is generally non-like-kind consideration and may be treated as boot unless it's structured carefully within the exchange. Discuss any seller-financing arrangement with your qualified intermediary and CPA before agreeing to it.
Is personal property included in a deal boot?
Yes, to the extent of its value. Since 2017, only real property is like-kind, so furniture, equipment, or other personal property bundled into a replacement purchase is non-like-kind and counts as boot. Allocating value carefully between real and personal property at closing helps minimize it.
Can I have boot in a multi-property exchange?
Yes. When you exchange into or out of multiple properties, the netting of cash and debt is calculated across all of them, and shortfalls can produce boot in ways that aren't obvious without running the full calculation. Your CPA should net the whole transaction to confirm whether any boot results.
How do I know if I'll have boot before closing?
Run the value-and-debt math in advance: compare your replacement's total value, the equity you're reinvesting, and the debt you're assuming against what you relinquished. If you're reinvesting all equity and replacing all debt into equal-or-greater value, you'll have zero boot. Your CPA and QI can confirm the figures before you close.
Glossary
- Boot
- Non-like-kind value received in an exchange, including kept cash and unreplaced debt; taxable up to the gain.
- Cash Boot
- Sale equity not reinvested into the replacement property.
- Mortgage Boot
- Debt relief not offset by new debt or additional cash.
- Realized Gain
- The total gain on the sale, which caps the amount of taxable boot.
- Recognized Gain
- The portion of gain actually taxed — equal to the boot, up to the realized gain.
- Netting Rules
- Rules governing how cash and debt offset; cash can offset debt relief, but debt cannot offset cash boot.
- Depreciation Recapture
- Gain from prior depreciation taxed up to 25%, generally recognized first when boot is taxed.
- Equal-or-Greater-Value Rule
- The requirement to acquire value at least equal to the relinquished property to fully defer.
- Partial Exchange
- An exchange where some value is deliberately taken as taxable boot and the rest deferred.
- Leveraged DST
- A DST with pre-arranged non-recourse debt that helps replace debt and invest a precise amount.
- Debt Relief
- Being freed of a liability, treated as value received and a source of mortgage boot.
- Form 8824
- The IRS form reporting a like-kind exchange, including recognized gain (boot) and carryover basis.
- Carryover Basis
- The relinquished basis carried into the replacement property, adjusted for any boot.
- Net Investment Income Tax (NIIT)
- A 3.8% surtax that can apply to recognized boot for higher-income taxpayers.
Sources & References
Disclosures
This article is published by Baker 1031 Investments, LLC for general educational purposes for accredited investors and is not an offer to sell or a solicitation of an offer to buy any security, nor is it tax, legal, accounting, or investment advice or a recommendation. Any securities offering is made solely through a sponsor’s private placement memorandum (PPM) following a suitability determination. Securities offered through Aurora Securities, Inc. (ASI), member FINRA / SIPC; Baker 1031 Investments is independent of ASI.
Oil & gas mineral and royalty interests and DST programs are speculative, illiquid securities sold only to verified accredited investors and involve substantial risk, including possible loss of principal, commodity-price and production-decline risk, lack of control, and the risk that an intended 1031 exchange fails to qualify for tax deferral. Whether a particular interest qualifies as like-kind real property is a fact-specific legal determination that varies by state and by the terms of the instrument. Tax results depend on your individual circumstances. Consult your own CPA and attorney before acting. Past performance does not guarantee future results.
