Net equity is your sale price minus the mortgage balance minus selling costs. This number determines exactly how much you must reinvest in your replacement property to achieve full tax deferral.
Net equity = Sale Price − Mortgage Balance − Selling Costs
Any net equity you keep as cash becomes taxable "boot"
You must reinvest 100% of net equity AND purchase a property of equal or greater value
The IRS tracks both metrics separately—fail either one and you trigger taxes
Use the 1031 Rule Net Equity Calculator to run your numbers before you list
Based on IRS Section 1031 requirements and verified exchange practices.
Net equity is the cash you would walk away with after selling a property and paying off all debts and costs. In a 1031 exchange, this number matters because it represents the minimum amount you must reinvest to defer your entire capital gains tax liability.
Think of net equity as your "skin in the game." It is the portion of your property's value that truly belongs to you after the mortgage company gets paid and the brokers take their cut.
The IRS does not care about your property's total value in isolation. They care about two things: the total sale price AND the equity you reinvest. Miss either target, and you owe taxes on the shortfall.
The formula is straightforward: Net Equity = Sale Price − Mortgage Balance − Selling Costs.
Selling costs typically include:
Real estate commissions (5-6% in most markets)
Closing costs and title fees
Transfer taxes (varies by state)
Attorney fees
Qualified Intermediary fees
Property tax prorations
Any outstanding liens or judgments
Line Item | Amount |
|---|---|
Sale Price | $800,000 |
Mortgage Balance | −$350,000 |
Commission (6%) | −$48,000 |
Closing Costs | −$12,000 |
Net Equity | $390,000 |
This investor must reinvest at least $390,000 of equity into replacement property. Any amount below this becomes taxable boot.
The IRS applies two independent tests to every 1031 exchange: the value test and the equity test. You must pass both to defer 100% of your capital gains.
According to IRS Publication 544, any cash or other property received in an exchange that does not qualify as like-kind is treated as boot and triggers immediate taxation.
Test | Requirement | Fails When |
|---|---|---|
Value Test | Replacement property must equal or exceed sale price | You buy a cheaper property |
Equity Test | Must reinvest 100% of net equity | You pocket any cash |
Here is the reality: most failed exchanges fail the equity test, not the value test. Investors get caught pocketing "just a little" cash without realizing every dollar triggers proportional taxation.
Any net equity you do not reinvest becomes taxable boot. The IRS will tax that portion at your applicable capital gains rate plus depreciation recapture (taxed at a maximum rate of 25% under IRC Section 1250).
Using the earlier example ($390,000 net equity), suppose the investor decides to keep $50,000 for renovations on a personal residence:
Net equity: $390,000
Amount reinvested: $340,000
Taxable boot: $50,000
That $50,000 triggers immediate capital gains tax. At a combined federal and state rate of 30%, the investor owes approximately $15,000 in taxes on money they thought they were "keeping."
This is where the risk lies: the boot is not just taxed—it is taxed at your full capital gains rate. There is no partial deferral discount.
Your net equity determines the minimum down payment for your replacement property. Add your available financing to calculate your maximum purchase price.
Factor | Amount |
|---|---|
Net Equity (Must Reinvest) | $390,000 |
New Loan Available (65% LTV) | $723,000 |
Maximum Purchase Price | $1,113,000 |
This investor can purchase up to $1.1 million in replacement property while meeting the value test ($800,000 minimum), debt replacement ($350,000 minimum loan) and the equity test ($390,000 minimum down payment).
According to data from the Federation of Exchange Accommodators, investors who calculate net equity before listing their property close exchanges at significantly higher rates than those who discover their numbers after entering escrow.
Five errors account for most net equity miscalculations in failed exchanges.
Net equity calculations focus on the exchange itself, but your total tax liability includes depreciation recapture on the portion not deferred. If you take any boot, you pay recapture taxes (at a maximum rate of 25%) on that proportional amount of depreciation.
Investors often budget 6% for commissions and forget about transfer taxes, attorney fees, and QI fees. In high-tax states like New York, transfer taxes alone can exceed 2% of the sale price.
Some investors pay off their mortgage early, thinking it simplifies the exchange. This increases net equity and means more cash must be reinvested. Run the numbers before making extra principal payments.
Any funds withdrawn from the exchange for repairs, improvements, or personal use become taxable boot. The Qualified Intermediary must control all funds until they are applied to the replacement property.
The IRS does not round. If your net equity is $390,000 and you reinvest $389,000, you have $1,000 of taxable boot. Strict compliance means exact numbers.
Run your net equity calculation before you list your property, not after you enter escrow. The 45-day identification deadline does not pause while you figure out your numbers.
Order a payoff statement from your lender. The balance on your statement may be 30-60 days old.
Get a broker price opinion or comparative market analysis for realistic sale price expectations.
Itemize all selling costs including commissions, title insurance, transfer taxes, and legal fees for your specific state.
Calculate net equity using the formula: Sale Price − Mortgage Balance − All Costs.
Determine financing capacity with a lender pre-approval for your replacement property.
Identify your purchase range: minimum purchase price (equal to sale price) and maximum (net equity + available financing).
Use the 1031 Rule Net Equity Calculator to run these scenarios before your first showing.
Paying down your mortgage before selling increases net equity—which means more cash you must reinvest. This is not always advantageous.
Scenario | Before Paydown | After $100K Paydown |
|---|---|---|
Sale Price | $800,000 | $800,000 |
Mortgage Balance | $350,000 | $250,000 |
Selling Costs | $60,000 | $60,000 |
Net Equity | $390,000 | $490,000 |
Required Down Payment | $390,000 | $490,000 |
The investor who paid down $100,000 now needs to find an additional $100,000 for the replacement property down payment. This limits options and increases pressure during the 45-day identification window.
Net equity calculations are straightforward, but their application to your specific exchange requires professionals who handle 1031s daily. A generalist CPA or real estate attorney may not catch the interactions between debt replacement, boot calculation, and identification rules.
The clock is ticking. Connect with a vetted 1031 exchange team who can run your numbers before you list and structure your replacement purchase to defer 100% of your capital gains.
Connect with a qualified 1031 exchange professional