1031 Exchange Debt Replacement Explained: How DSTs Solve the Problem

A 1031 exchange has three “equal or greater” requirements that most landowners don’t realize until closing day. Miss one and you owe tax on the shortfall.

The three IRS rules

1. Equal or greater purchase price. If you sold for $5M, you must reinvest all $5M.
2. Equal or greater equity. If you had $3M in equity after paying off debt, all $3M must go into the new property.
3. Equal or greater debt. If you had $2M in debt on the old property, you must replace at least $2M of debt on the new property, or add that amount in cash.

Miss any of these, and you trigger taxable “boot.”

What is boot?

Boot is any cash or debt relief you receive that doesn’t get rolled into the replacement property. The IRS treats the shortfall as income, and you’ll owe taxes on it.

Example: You had $2M in debt on the property you sold. On the replacement property, you only carry $1M in debt and don’t add any extra cash. The IRS treats that $1M debt-relief as boot, taxable as ordinary or capital gains depending on the source.

How to replace debt

Four strategies:

• Take on new debt. Borrow the same amount of debt you had on your old property.
• Add fresh cash. Instead of borrowing, contribute your own cash to cover the debt requirement.
• Overfund with equity. If you put in enough extra cash, you don’t need to carry debt.
• Accept partial boot. You can intentionally reduce your leverage, but you’ll owe tax on the amount of debt not replaced.

How DSTs make debt replacement easier

With a DST, the debt replacement is already baked in.

When you invest in a DST, you’re buying a fractional interest in institutional real estate, multifamily, self-storage, student housing, 55+ communities, that already has financing in place. That financing is non-recourse debt.

This means:

• You don’t have to arrange your own loan. The DST structure satisfies the IRS’s debt replacement rules automatically.
• Your debt requirement is covered proportionally. If you invest $500,000 into a DST that’s structured 50% equity and 50% debt, your investment represents $1,000,000 of property value.
• No personal guarantees. Because the DST debt is non-recourse, the lender can only look to the property itself, not your ranch, not your savings, not your personal balance sheet.

Old way vs. DST way

	Traditional 1031 with Local Bank	1031 Using a DST
Equity	$500,000	$500,000
Debt	$500,000 borrowed in your name	$500,000 non-recourse, already in place
Personal liability	Recourse, bank can come after you personally	None, lender’s only collateral is the property
Loan management	Underwriting, guarantees, refinancing risk, balloon payments	Financing pre-packaged and managed by sponsor
Balance sheet	Loan shows up as personal liability	Off your books

Bottom line: Old way, you carry the debt yourself. DST way, the debt is baked in, non-recourse, and the liability doesn’t follow you home.

Benefits of DSTs for debt replacement

• Debt off your books. Non-recourse DST debt doesn’t show up on your personal balance sheet or require ongoing loan servicing.
• No refinancing risk. You’re not on the hook for rate resets, balloon payments, or lender negotiations.
• Simplified compliance. The DST sponsor structures the financing in advance, so your exchange automatically satisfies IRS rules.
• Peace of mind. You meet the debt requirement without saddling your heirs, or yourself, with another personal liability.

Can I just add cash instead of debt?

Yes. If you’d rather stay debt-free, you can add enough cash to cover the debt requirement. If you had $2M in debt on your old property, you could simply contribute $2M cash. This avoids leverage but requires liquidity.

What if I don’t replace the debt?

The IRS taxes the difference as boot. If you had $2M in debt and only replaced $1M, the $1M shortfall becomes taxable. That could mean a six-figure surprise tax bill at closing.

Bottom line

A 1031 exchange is one of the best tools for protecting wealth, but the debt replacement rules are non-negotiable. Whether you take on new debt, contribute cash, or leverage non-recourse DST financing, you must satisfy the IRS’s “equal or greater” requirements across purchase price, equity, and debt.

Handled correctly, a 1031 exchange keeps your equity working for you. Mishandled, it hands the IRS a piece of your legacy.