Seller Financing Taxes: How the Note Is Taxed and How to Protect It

How seller financing works

The buyer pays part of the price at closing and signs a promissory note to you for the rest. Title passes to the buyer, and you hold a lien on what you sold. Because at least one payment arrives after the year of sale, it is an installment sale under IRC 453 automatically.

• Principal: each payment is part basis and part gain, using the gross profit ratio; you report it on Form 6252.
• Interest: ordinary income when received, and net investment income for the 3.8% surtax where your income is above the threshold.
• Minimum rate: the note must carry at least the applicable federal rate (AFR). For a sale you may use the lowest AFR in the three months ending with the month of the binding written contract (IRC 1274(d)(2)). Below that, IRC 483 or 1274 recharacterizes part of the principal as interest. The IRS publishes the AFRs monthly.

Seller financing is often the reason a deal closes at all: a buyer who cannot get a bank loan for a business, raw land or a unique property can buy from you, often at a better price.

Who it fits, and who it does not

Fits: a seller with a buyer they can underwrite (a key employee, a successor, an operator in the same industry, a well-capitalized investor); property banks dislike financing; a seller who wants income and lower brackets; farm sellers, who escape the Section 453A interest charge (453A(b)(3)(B)).

Does not fit: a seller who needs the cash now for the next purchase; a thin buyer with no equity; a sale of public stock, inventory or dealer property; a home sale to an owner-occupant if you are not prepared for consumer-lending rules (federal and state rules on residential mortgage lending can apply, so use an attorney).

How sellers protect themselves

You are now the lender. Lenders protect themselves with equity, collateral and documents. The standard toolkit:

• Down payment. The bigger the buyer's cash in the deal, the less likely they walk. It also covers your year-one tax on recapture and any mortgage payoff.
• First-position security. A recorded deed of trust or mortgage on real estate, ahead of any other lender. If a bank loan sits first, you are second and should price and document accordingly.
• UCC lien on business assets. For a business sale, a security agreement and UCC-1 filing on equipment, receivables, inventory and intellectual property, plus a pledge of the buyer's stock or membership interests.
• Personal guarantee. When the buyer is an LLC or corporation, a personal guarantee from its owners puts their own balance sheets behind the note.
• Escrow and holdbacks. A third-party escrow or servicing company to collect payments and impound property taxes and insurance; holdbacks for known issues.
• Note terms. Rate at or above the AFR; an amortization schedule and any balloon; late charges; default and cure periods; acceleration on default; a due-on-sale clause so a resale pays you off; prepayment terms (an early payoff ends your deferral); covenants such as no further encumbrance and keeping the business operating; annual financial statements and tax returns from the buyer.
• Collateral upkeep. A lender's title policy, hazard insurance naming you as loss payee or mortgagee, and proof that property taxes are paid.

If the buyer defaults: Section 1038

For real estate, IRC 1038 applies when your note was secured by the property you sold and you take that property back in satisfaction of the debt. It limits the tax on the repossession, allows no bad-debt deduction, and gives the reacquired property a carryover-style basis (Treas. Reg. 1.1038-1).

• Gain on repossession: the cash and other property you received before the repossession (interest excluded) minus the gain you already reported.
• Cap: the original gain, minus gain already reported, minus your repossession costs.
• Basis of the property you take back: your basis in the unpaid note, plus the repossession gain, plus repossession costs.
• Character: follows the original sale under the installment method.

Business assets and other personal property are different: taking them back is a disposition of the note, and your gain or loss is generally the property's fair market value less your basis in the note and your costs (Publication 537, Repossession).

Worked example: a default and repossession

Assumptions (illustration only): you sell investment land for $1,000,000 with a $400,000 basis. Gain $600,000, gross profit ratio 60%. The buyer pays $200,000 down in year one and $100,000 of principal in year two, then defaults. The note was secured by a first deed of trust. You spend $20,000 to foreclose and take the land back.

For a married couple filing jointly in Texas with $100,000 of other income, the Big Sale Tax engine puts the added 2026 federal tax on that $120,000 long-term gain at $13,335. You keep the $300,000 and the land, with a basis that lets you resell it later. Without a lien on the land securing the note, Section 1038 would not apply and recovery would depend on a lawsuit.

IRS stance and audit risk

Seller financing is ordinary, long-settled installment reporting, explained in Publication 537. It is not a listed transaction. What examiners check:

• Interest rate: stated interest below the AFR gets recharacterized (IRC 483, 1274).
• Gross profit ratio and Form 6252: recapture reported in year one under 453(i); the ratio applied every year.
• Related buyers: a related buyer's resale within two years accelerates your gain (453(e)); depreciable property sold to a controlled entity loses the method (453(g)).
• Pledging the note: loan proceeds secured by the note are treated as payment (453A(d)).
• Selling or forgiving the note: triggers the deferred gain under IRC 453B; cancelling the note, including forgiving it for a family member, is treated as a disposition.
• Large notes: the 453A interest charge on deferred tax for notes above $5,000,000 outstanding at year end.

Costs and fees

• Attorney fees for the purchase agreement, note, deed of trust or security agreement, UCC filing and personal guarantee.
• Lender's title policy and recording fees.
• Loan servicing, if you use a servicer: setup plus a monthly fee.
• Annual CPA time for Form 6252 and interest reporting.
• Foreclosure or collection costs if things go wrong.
• Opportunity cost: one note at one rate instead of diversified investments.

How it compares with a Section 453 installment sale

They are the same tax tool seen from two sides. "Seller financing" describes the deal: you lend the buyer part of the price. "Installment sale" describes the tax: Section 453 taxes that financed gain as it is collected. Every seller-financed sale of eligible property is an installment sale unless you elect out. For the tax mechanics in depth, read the installment sale analysis. For other ways to carry paper, see the wrap-around mortgage, the contingent payment sale and the earn-out. To see how seller financing stacks up against a 1031 or a deferred sales trust, see 1031 vs installment sale and deferred sales trust vs installment sale.

Frequently asked questions