Home / Articles

Buyer Defaulted or Paid Early? Your Installment Sale Tax

By Hans Goldstein · Updated 2026-09-27

If the buyer on your owner-financed sale stops paying, you can usually foreclose and take the property back, and for real estate Section 1038 limits the tax on that repossession. If the buyer pays early instead, the rest of your deferred gain is taxed in the payoff year. And if you sell, give away or borrow against the note, the deferred gain generally comes due too (§453B, §453A(d)).

Those are the three ways an installment sale can end before its schedule does. This page walks through each with numbers. The rules come from the Code sections above and the repossession worksheets in IRS Pub. 537.

Early payoff: the remaining gain comes due that year

The installment method taxes gain when you are paid. A buyer who refinances, sells the property or simply prepays hands you the rest of the principal, and the rest of the gain comes with it. Nothing about the payoff is a penalty; it is just a big payment.

Simple example. You sold land for $700,000. Installment sale basis is $280,000, so gross profit is $420,000 and the gross profit percentage is 60%. The buyer paid $100,000 down and signed a $600,000 note at $60,000 of principal a year. After three annual payments, $420,000 is still owed, and the buyer refinances and pays it off.

Now the tax. Simple example assumptions: married filing jointly, $100,000 of other ordinary income, standard deduction, 2026 brackets held flat (Rev. Proc. 2025-32), long-term gain, note interest left out.

Same gain, about $37,000 of tax instead of about $5,000, because the payoff stacks the gain into one year and over the NIIT line. You cannot fully prevent this. A prepayment lockout or premium can be negotiated into a commercial note, but a due-on-sale clause in your own note usually forces a payoff when the buyer sells. A structured installment sale, where an assignment company pays a fixed schedule, removes the buyer prepayment risk but carries its own trade-offs: you become an unsecured creditor of the assignment company, the schedule is locked, a commission is built into the pricing, and no IRS ruling specifically approves the structure; see seller financing vs a structured sale.

Selling or giving away the note: a §453B disposition

You can sell your note to an investor, give it to a family member, or cancel it. Each is a disposition of the installment obligation under §453B, and the deferred gain is triggered.

Your basis in the note is the unpaid balance minus the gain you would report if it were paid in full (§453B(b)). In practice: unpaid balance x (1 - gross profit percentage).

The gain keeps the character of the original sale: capital if the original gain was capital, ordinary if it was ordinary (§453B(a); Pub. 537).

Simple example, continuing. Instead of a refinance, the buyer keeps paying but you want cash in year 5. The unpaid balance is $420,000, and your basis in the note is $420,000 x 40% = $168,000. An investor buys the note for $360,000, a discount for the buyer's credit and the rate.

The discount lowered the gain (from $252,000 to $192,000), but you also received $60,000 less. All of it is reported in the year you sell.

Not dispositions. A transfer to a spouse, or to a former spouse incident to divorce, is not a taxable disposition; the spouse steps into your position (§453B(g); Pub. 537). A reduced price without cancellation of the rest is not a disposition either; you refigure the gross profit percentage (gross profit percentage). And if the buyer sells the property and you let the new owner assume the note, Pub. 537 says that is not a disposition, even at a higher rate. At death, §453B does not apply to the transmission of the note; it passes as income in respect of a decedent under §691, with no step-up, and heirs report the gain as paid. Canceling the note at death, or leaving it to the buyer, is a disposition.

Borrowing against the note

Pledging the note as collateral is a quieter way to trigger tax. For installment sales with a sales price over $150,000, the net proceeds of a loan secured by the note are treated as a payment on it (§453A(d)), capped at the contract price not yet received. Personal-use property sold by an individual and farm property are exempt. See the §453A interest charge and pledge rule.

In the running example, borrowing $300,000 against the $420,000 note would be a $300,000 payment and $180,000 of gain, even though the buyer paid you nothing extra.

Buyer stops paying: options before foreclosure

Before the tax rules, the practical ones. When payments stop, a seller-lender typically has these options, in rough order of cost:

1. Work it out. A short forbearance, a modified schedule, or a reduced price. A modified schedule is not a disposition. A reduced price means refiguring the percentage. Forgiving part of the balance for a partial payment is a §453B disposition of the note.
2. Take a deed in lieu of foreclosure. The buyer voluntarily hands the property back. Pub. 537 says the repossession rules apply however you repossess, whether by foreclosure or voluntary surrender.
3. Foreclose. Months or longer, with legal fees, and in some states limited or no deficiency judgment. In California, a seller who carries back the purchase price generally cannot get a deficiency judgment (Code Civ. Proc. §580b). If the buyer files bankruptcy, the automatic stay freezes the foreclosure.

You also get the property back in whatever condition the buyer left it: unpaid property tax, lapsed insurance, deferred maintenance. The terms you negotiate up front matter most; see seller financing note terms and the risks in seller carry back.

Repossessing real property: §1038 limits the gain

When you take back real property you sold on a note secured by that property, §1038 controls. It is mandatory, and it applies whether or not you used the installment method. The idea is to put you back roughly where you were before the sale: cash you already received is treated as income to the extent you have not yet reported it, but the total is capped at the gross profit you originally expected.

Gain on repossession is the lesser of:

• (a) all money and other property received before the repossession (not counting the buyer's own notes), minus gain already reported, or
• (b) your gross profit on the original sale, minus gain already reported, minus your repossession costs (§1038(b)(1), (2)).

Basis in the repossessed property is your basis in the unpaid note, plus the repossession gain, plus repossession costs (§1038(c); Pub. 537 Worksheet E).

Simple example. You sold land for $400,000. Adjusted basis was $200,000 and selling expenses $20,000, so gross profit is $180,000 and the gross profit percentage is 45%. The buyer paid $80,000 down, then two annual payments of $40,000, and you reported $72,000 of gain (45% of $160,000). The buyer defaults with $240,000 owed. You foreclose and spend $10,000 in legal and recording costs.

You have now paid tax on every dollar of cash the buyer paid you, you own the land again, and your basis carries your old gain forward. The character of the repossession gain follows the original sale. For a later resale, your holding period includes your original ownership plus the time after repossession, but not the buyer's period (Pub. 537).

Conditions. Pub. 537 lists three: the repossession must protect your security rights; the note satisfied must be the one you received in the original sale; and you cannot pay the buyer extra to get the property back unless the original contract provided for it or the buyer has defaulted or default is imminent. If any condition fails, you use the personal property rules below instead.

Your former home. If the original sale used the §121 exclusion and you resell the property within one year of repossessing it, §1038(e) treats the resale as part of the original sale for §121 purposes instead of applying the usual repossession gain rules.

Repossessing personal property or a business

Personal property, including equipment or other non-real assets of a business, follows a different rule. Gain or loss is the property's fair market value when you take it back, minus your basis in the note and your repossession costs (Pub. 537 Worksheet C). If you used the installment method, your basis in the note is the unpaid balance times (1 - gross profit percentage), and the gain or loss has the same character as the original sale. Your new basis in the property is its fair market value.

Pub. 537's example: a piano sold for $1,500 with a 40% gross profit percentage is repossessed with $800 unpaid. Basis in the note is $480, costs are $75, and the piano is worth $1,400, so the gain is $845.

A business sale adds allocation questions: which assets secured the note and what each is worth when you get it back. Real estate inside the business follows §1038; the rest follows the fair market value rule. That is a job for your CPA with the purchase agreement in hand. See selling a business with seller financing.

Bad debt vs repossession

If you repossess real property under §1038, you cannot take a bad debt deduction for any part of the note, even if the property is worth less than what was owed (§1038(a); Pub. 537). If you took a bad debt deduction in an earlier year, it comes back as income on repossession to the extent it reduced your tax (§1038(d)).

If there is nothing to repossess, or the note was unsecured and becomes worthless, your unrecovered basis in the note may be deductible as a bad debt under §166. For an individual, a nonbusiness bad debt is treated as a short-term capital loss (§166(d)(1)(B)), which offsets capital gains and only $3,000 of ordinary income a year. Worthlessness has to be shown with facts, so document your collection efforts.

If you would rather cash out the note than wait, see selling a promissory note for how note buyers price the discount and how the sale is taxed.

Bottom line

A seller-financed note can end early three ways: payoff, disposition, or default. A payoff or a note sale taxes the remaining gain in one year. Borrowing against the note does the same for the amount borrowed. A default on real estate brings §1038, which taxes cash you have received but not yet reported, capped by your original gross profit, and hands you back the property at roughly your old basis. Model the downside before you carry a note: the seller financing calculator and the installment sale guide are good starting points, and seller financing taxes covers the rest of the rules.

Questions to ask your CPA

• If my buyer pays off the note next year, how much tax will the payoff create, and should I plan estimated payments for it?
• What is my basis in the note today, and what would a sale of the note at a discount produce?
• Would a loan secured by the note be treated as a payment under §453A(d)?
• If I repossess, what is my §1038 gain and my new basis, and what records of payments and costs do you need?
• If I cannot repossess, when can I claim a bad debt, and is it business or nonbusiness?
• Does my state limit deficiency judgments on a seller-financed note?

Educational only, not tax, legal or investment advice. Examples are illustrative. Have your CPA or tax attorney review your facts before you act. Hans Goldstein is a licensed insurance agent (CA Insurance License #4273294) and is not a CPA or attorney. He is paid a commission only if a structured installment sale is funded; seller financing pays him nothing. Disclosures.