What it is and 5 Strategies to Reduce the Tax
Most real estate investors learn what boot is at the worst possible time: at closing on their replacement property, when their Qualified Intermediary or CPA mentions that a portion of their exchange is going to be taxable after all. The “tax-free exchange” they thought they were doing turns out to have a real tax bill attached. For an investor who was counting on full deferral, the surprise can be substantial.
Boot is not a flaw in the 1031 exchange. It is the mechanism the IRS uses to make sure investors do not get tax deferral on anything they did not actually reinvest. Cash that came back to you at closing is taxable. A smaller mortgage on the replacement property than the relinquished property is taxable. A replacement property worth less than the relinquished property creates a taxable difference.
The good news is that boot is one of the most addressable problems in real estate tax planning. If you catch it early enough, you can often eliminate it entirely by restructuring the exchange. Even if you cannot eliminate it, there are offset strategies that can substantially reduce the resulting tax bill. This article walks through both: what boot actually is, the two main types that catch investors off guard, and the five strategies that consistently work to reduce the impact.
What Boot Actually Is
In a 1031 exchange, “boot” is any value you receive that does NOT qualify as like-kind property. It can take several forms, but the underlying concept is the same: the IRS taxes the portion of the exchange where you actually got something other than another piece of investment real estate.
There are two main categories of boot that investors encounter:
Cash Boot
This is the most obvious form. Cash boot is any actual money you receive during or as a result of the exchange. The most common scenarios:
- Excess proceeds at closing. You sold the relinquished property for $1,000,000 and bought the replacement for $850,000. The $150,000 difference is cash boot, taxable in the year of the exchange.
- Net cash received from the QI. Your Qualified Intermediary returns any unused proceeds to you at the end of the exchange period. Those returned funds are cash boot.
- Personal expenses paid from exchange funds. If you use exchange proceeds to pay non-qualifying expenses, those amounts are treated as if you received cash.
- Earnest money or other payments outside the exchange. Payments you received directly (rather than through the QI) can be treated as cash boot.
Cash boot is taxable at capital gains rates to the extent of the gain on the relinquished property, with depreciation recapture portions taxed at higher rates.
Mortgage Boot
This catches more investors than cash boot, because it is less intuitive. Mortgage boot occurs when the mortgage on the replacement property is smaller than the mortgage on the relinquished property. The IRS treats the difference as if you received cash, even though no actual cash changed hands.
A common scenario: You sold a relinquished property worth $1,000,000 with a $600,000 mortgage. You acquired a replacement property worth $1,000,000 but financed only $400,000. You have $200,000 of mortgage boot, even though the property values match and you did not pocket any cash.
The IRS view is that paying off $200,000 of debt is economically equivalent to receiving $200,000 of cash. The tax treatment reflects that.
Mortgage boot can be offset by cash. If you bring $200,000 of your own cash to the closing and apply it to the replacement property purchase, that offsets the $200,000 of mortgage reduction and eliminates the mortgage boot.
How Boot Is Taxed
Boot is taxed at the relevant rate for the underlying gain it represents. For a typical real estate exchange, this breaks down as follows:
Unrecaptured Section 1250 Gain (Up to 25 Percent Federal)
If the gain represents previously taken depreciation on real property, that portion is taxed at the unrecaptured Section 1250 gain rate, with a maximum federal rate of 25 percent. Most real estate boot falls into this category.
Long-Term Capital Gains (0, 15, or 20 Percent)
Any boot representing appreciation above the depreciation recapture is taxed at standard long-term capital gains rates, which are 0, 15, or 20 percent at the federal level depending on income.
Net Investment Income Tax (3.8 Percent)
High earners (single filers over $200,000 MAGI, married filing jointly over $250,000) pay an additional 3.8 percent Net Investment Income Tax on the boot.
State Tax
Most states tax boot at standard state income tax rates. For investors in California, New York, Oregon, Hawaii, or other high-tax states, state tax on boot can add 5 to 13 percent on top of the federal exposure.
For an investor in the top federal bracket living in a high-tax state, total combined tax on real estate boot can approach 40 percent or more.
Why Investors End Up With Boot
A few patterns consistently produce taxable boot in exchanges that were planned to be fully deferred:
Trading Down
The most common cause. The investor identifies and closes on a replacement property worth less than the relinquished property. The price difference becomes cash boot.
Insufficient Replacement Debt
The replacement property is fully matched in value, but the investor financed it with less debt than the relinquished property carried. The mortgage reduction becomes mortgage boot.
Cash Taken at Closing
The investor took some cash at closing for any reason, even one that seemed routine (covering closing costs, paying off other debts, addressing immediate cash needs). The cash becomes boot.
Identifying the Wrong Replacement Property Mix
In an exchange involving multiple replacement properties (allowed under the three-property rule or the 200 percent rule), the combined value of the replacement properties is less than the relinquished property value.
Missing the Math on Closing Costs
Some closing costs can be paid from exchange proceeds without creating boot. Others cannot. The investor mistakenly uses exchange funds for non-qualifying expenses (loan origination fees in some structures, prorated property tax credits, prepaid interest), and the IRS treats those amounts as boot.
Five Strategies to Reduce the Tax on Boot
Once boot is in the picture, the question becomes how to reduce the tax. Some strategies work to eliminate or minimize the boot itself. Others offset the tax owed once the boot is recognized. Most effective plans combine both.
Strategy 1. Bring Cash to the Closing to Offset Mortgage Boot
If your replacement property has less debt than the relinquished property, the difference is mortgage boot. You can eliminate this boot by bringing additional cash to the closing and applying it to the replacement property purchase. The cash you contribute is treated as part of your investment in the replacement property, offsetting the debt reduction.
This is one of the most underused techniques in 1031 planning. Many investors who could eliminate mortgage boot with a small additional cash contribution at closing simply do not realize the option exists.
The cash has to be your own funds, not exchange proceeds. It needs to be applied directly to the replacement property purchase, not received as a return.
Strategy 2. Identify Additional or Higher-Value Replacement Property
If you are still within the 45-day identification window, you have the option to revise your identifications. Adding a second replacement property (under the three-property rule) or identifying higher-value properties can soak up the entire exchange proceeds and eliminate cash boot.
This requires acting fast and having properties available that meet the like-kind requirement. Once the 45-day window closes, the identifications are locked.
Strategy 3. Recognize Strategic Losses in the Same Tax Year
If the boot has already been created and the exchange has closed, the focus shifts to offsetting the tax. Capital losses from other investments recognized in the same tax year can offset the boot dollar for dollar.
The losses do not have to be real estate losses. Stocks, bonds, business interests, cryptocurrency, or other capital assets all work. For investors with other portfolio positions, year-end loss harvesting in the year of the boot can substantially reduce the tax owed.
The Section 1250 portion of the boot (the depreciation recapture component) has more limited offset interactions, so coordinating with a CPA on which losses to recognize is worthwhile.
Strategy 4. Stack Bonus Depreciation From Other Acquisitions
If you are acquiring other depreciable property (commercial real estate, business equipment, vehicles) in the same year as the exchange that created boot, bonus depreciation on those new assets can offset the boot income. Under restored 100 percent bonus depreciation, the deductions can be substantial.
The Section 179 and bonus depreciation deductions are not technically tied to the boot. They simply reduce overall taxable income in the year the boot is recognized. The strategy works best when the additional acquisitions were already planned and can be timed to coincide with the boot recognition year.
Strategy 5. Coordinate Charitable Giving in the Boot Year
A high-income year created by 1031 boot is exactly the kind of year where coordinated charitable giving produces outsized tax savings. Funding a donor-advised fund with multiple years of intended giving in the boot year, donating appreciated assets directly to charity, or structuring a charitable remainder trust around the boot proceeds can substantially reduce the resulting tax bill.
The 2026 charitable giving rules under OBBBA include a new 0.5 percent of AGI floor on itemized deductions, which makes bunching multi-year giving into a single boot-year contribution more valuable than ever. The floor applies once to the bunched gift instead of repeatedly to annual giving.
Common Mistakes With Boot Planning
A few patterns consistently make boot situations worse than they need to be:
Waiting Until Tax Season to Address It
The offset strategies (loss harvesting, bonus depreciation, charitable giving) all have December 31 deadlines. By the time most investors discuss the boot with their CPA in March, the year is closed and the offsets are no longer available.
Not Knowing About Mortgage Boot Until Closing
Many investors plan their exchanges around cash boot and miss the mortgage boot issue entirely. They show up to the closing on the replacement property assuming everything is balanced, only to learn that their loan structure created $100,000 to $500,000 of mortgage boot. By then, the closing is typically already structured and changing it is difficult.
Treating Boot as a Failure
Some investors treat any boot in an exchange as evidence the exchange “didn’t work.” It did work. The portion that was reinvested in like-kind property is fully deferred. The portion that became boot represents value that was not reinvested. The deferral on the reinvested portion is still a substantial tax benefit even if the entire transaction was not 100 percent deferred.
Forgetting State Tax
Federal boot planning is only half the picture. For investors in high-tax states, the state tax on boot can rival the federal tax. Planning needs to address both layers.
Letting Boot Be a Surprise
The most expensive boot situations are the ones the investor did not see coming. Working with a Qualified Intermediary who understands boot mechanics, coordinating early with your CPA on the financing structure, and modeling the closing math before signing the contracts can prevent most boot surprises entirely.
When Boot Is Worth Accepting
There are situations where accepting some boot is actually the right business decision:
When You Need the Cash
Sometimes the cash distribution is the point. If you genuinely need cash from the exchange (to pay down personal debt, fund another investment outside real estate, address liquidity needs), the boot is the cost of accessing that cash. Paying the tax may still be better than the alternative of not having access to the funds.
When the Replacement Property Is Right
If the only replacement property that fits your investment goals happens to be worth less than the relinquished property, accepting the boot may be better than forcing yourself into an unsuitable replacement just to avoid the tax.
When You Plan to Sell Soon Anyway
If you are getting close to a planned exit from real estate, the deferral benefit of a perfect exchange is less valuable than it would be for a long-term holder. Boot in the year of the exchange may be more efficient than maximum deferral followed by recognition in a year or two.
The right answer in these situations is to model the alternatives carefully with your CPA and your QI. Sometimes the math favors accepting the boot, applying offset strategies, and moving on.
The Honest Bottom Line
Boot is not a flaw in the 1031 exchange. It is the mechanism that defines what got deferred and what did not. Investors who understand boot mechanics before they enter an exchange almost never get surprised by it. Investors who learn about boot at the closing table almost always pay more tax than necessary.
The strategies described here work best when applied early. Bringing cash to the closing requires planning before the closing. Identifying additional replacement property requires acting within the 45-day window. Loss harvesting, bonus depreciation, and charitable giving offsets all require execution before December 31 of the year the boot is recognized.
If you are in a 1031 exchange and starting to see signs of boot, or if you have just completed an exchange and learned that boot is going to be part of the tax picture, contact our team as soon as possible. Some options narrow quickly. Other options remain available through year-end. The earlier the conversation happens, the more of your equity stays in your portfolio rather than going to the IRS. The 1031 exchange is still doing its job on the deferred portion. The question is how to handle the portion that became boot.
