Owner Financing Tax Reporting: Installments, Interest, Form 1098

Owner financing tax reporting splits into two returns that mirror each other: the seller reports each payment as part installment gain and part interest income, and the buyer deducts the interest paid if the loan qualifies as home mortgage debt. The seller uses Form 6252 for the gain and Schedule B for the interest. The buyer claims the interest on Schedule A, line 8b, using the seller’s taxpayer identification number. Neither party receives a Form 1098 from a bank, so the paperwork obligations shift directly onto them.

How the Seller Reports Each Payment

The installment method is the default. Instead of paying tax on the whole gain at closing, the seller spreads the gain across the years payments actually arrive. It applies automatically to any sale that produces a gain with at least one payment received after the year of sale.¹

Three numbers drive the calculation. Gross profit is the selling price minus adjusted basis (original cost plus improvements, minus depreciation claimed) and selling expenses. Contract price is the selling price reduced by any existing debt the buyer assumes, as long as that assumed debt does not exceed basis. Gross profit divided by contract price gives the gross profit percentage.

That percentage is the taxable share of every dollar of principal received. A 40% gross profit percentage means 40 cents of each principal dollar is capital gain and 60 cents is a nontaxable return of investment. Interest is handled separately.

The sale is reported on Form 6252 in the year of closing and again in every year a payment is received. The gain from Form 6252 flows to Schedule D of Form 1040.²

Depreciation Recapture Comes Due at Closing

If the property was depreciated (a rental, for example), the recapture is taxable in the year of sale even if no principal payment arrives that year. For real property depreciated on a straight-line basis, this is unrecaptured Section 1250 gain, taxed at a maximum rate of 25%, which is higher than the standard long-term capital gains rates of 0%, 15%, or 20%.² Only the gain exceeding the recapture qualifies for installment treatment, and the gross profit percentage must be adjusted so the same gain isn’t taxed twice over the life of the note. Sellers of former rentals are the ones most often surprised by this: a tax bill lands in year one even when the buyer’s first principal payment isn’t due until year two.

When the Installment Method Doesn’t Apply

Losses are reported in full in the year of sale; the installment method only handles gains. Sales of inventory or property held for sale to customers in the ordinary course of business are excluded outright.²

A seller can also elect out and report the entire gain in the year of sale by using Form 8949 or Form 4797 instead of Form 6252. The election is due by the return’s due date, including extensions, with an automatic six-month extension available through a timely amended return. Once made, revoking it requires IRS approval. Electing out makes sense when future tax rates are expected to be higher, when current capital gains rates are unusually favorable, or when the seller simply doesn’t want to file Form 6252 every year for a decade.

Interest Income on the Note

The interest portion of each payment is ordinary income, entirely separate from the capital gain component. The seller reports it on Schedule B (Interest and Ordinary Dividends), listing the buyer’s name, address, and Social Security number, and must also give the buyer the seller’s own SSN. Missing either identifier can trigger a $50 penalty.³

Because interest is taxed at ordinary rates rather than capital gains rates, it is often the larger annual tax hit on a big note. It also counts as investment income for the surtax discussed below.

The Applicable Federal Rate Floor

The stated interest rate on the note has to meet a floor. If it falls below the Applicable Federal Rate the IRS publishes monthly, part of every principal payment gets reclassified as imputed interest. That reclassified amount becomes ordinary income to the seller and deductible interest to the buyer, defeating any attempt to disguise interest as lower-taxed capital gain.

The AFR has three tiers based on the term of the note: short-term for obligations of three years or less, mid-term for three to nine years, and long-term for terms over nine years.⁴ The rate that matters is the one in effect during the month the sale closes. Two Code sections do the work: Section 1274 covers most debt instruments issued for property,⁵ and Section 483 covers deferred-payment sales outside Section 1274, though it doesn’t apply when the total sale price is $3,000 or less.⁶ For sales of a principal residence between individuals where total payments do not exceed $250,000, Section 1274 allows the simpler Section 483 rules to apply.

Net Investment Income Tax

Higher-income sellers owe an additional 3.8% surtax on net investment income, and both the installment gain and the interest count.⁷ The tax hits the lesser of net investment income or the excess of modified adjusted gross income over $250,000 (married filing jointly), $200,000 (single), or $125,000 (married filing separately).⁸ These thresholds are not indexed for inflation, so more sellers cross them each year, and a big note can be what pushes someone over.

How the Buyer Deducts the Interest

The buyer’s deduction lives on Schedule A, line 8b, labeled “Mortgage interest not reported to you on Form 1098,” with the seller’s name, address, and TIN entered alongside the amount.⁹ The deduction is available only if the loan qualifies.

The loan must be acquisition indebtedness: used to buy, build, or substantially improve a qualified residence, meaning the buyer’s main home or one second home actually used as a dwelling during the year. For loans originated after December 15, 2017, interest is deductible on up to $750,000 of acquisition debt ($375,000 if married filing separately).⁹

The debt has to be secured by the property. In practice, that means the mortgage or deed of trust is properly recorded with the local recording office. An informal owner-financed deal with an unrecorded note fails this test, and the buyer loses the interest deduction even with a perfect payment history. This is the single most common way owner financing goes wrong at tax time.

Points

Points paid to obtain the loan on a principal residence can be deducted in the year paid if they relate to buying, building, or improving that home, are figured as a percentage of the principal, match customary charges in the area, and the buyer brought cash to closing at least equal to the points.¹⁰ Points on a second home or a refinance are deducted ratably over the loan’s life. Appraisal fees, notary fees, and other closing costs are not deductible as interest even when listed near the points on a settlement statement.

TIN Exchange, Form 1098, and Backup Withholding

Because no bank sits in the middle, both parties owe each other identifying information. The seller needs the buyer’s name, address, and SSN for Schedule B; the buyer needs the same from the seller for Schedule A. The best time to exchange TINs is at closing.

A seller who is not in the business of lending is generally not required to issue Form 1098 to the buyer. The IRS does not treat an individual carrying back a single note as being in the trade or business of lending. The general threshold for filing Form 1099-INT is $10 of interest paid; the $600 threshold applies when interest is paid in the course of a trade or business.¹¹

The buyer’s deduction does not depend on receiving a Form 1098. If the seller sends nothing, the buyer still deducts the interest as long as the loan qualifies and there’s documentation such as the closing statement, amortization schedule, and payment records to back up the amount.⁹ If the seller refuses to hand over a TIN, the buyer should file the return anyway, attach a statement giving the seller’s name and address, and describe the attempts made to obtain the number. Without that showing of reasonable effort, the IRS may disallow the deduction.

When a payee fails to provide a correct TIN, backup withholding may apply, and the rate for reportable payments in 2026 is 24%.¹²¹³ Exchanging TINs at closing sidesteps the problem.

Selling to a Relative

Owner financing to a family member carries a specific trap. If the related buyer resells the property within two years, the seller’s remaining deferred gain accelerates: the IRS treats the proceeds from that second sale as if the original seller received them at the time of the resale.¹⁴ Related persons for this rule include spouses, children, grandchildren, parents, siblings, and entities the seller controls. The two-year clock pauses during any period the buyer’s risk of loss is substantially reduced, for example through a put option or a short sale.

The rule doesn’t fire if the related buyer’s disposition was an involuntary conversion, if either party dies before the second sale, or if neither disposition had tax avoidance as a principal purpose. The last exception requires convincing the IRS, so a seller carrying a note from a relative should document non-tax reasons for the transaction.

Disposing of the Note or Facing a Default

Selling the promissory note to a third party triggers immediate recognition of the deferred gain. The gain equals what’s received minus the seller’s basis in the note (unpaid balance minus unreported gain calculated with the gross profit percentage), and the character follows the original sale.² Gifting the note is also a disposition, measured by fair market value at the time of the gift. Transfers between spouses or former spouses incident to divorce do not trigger gain. If instead the property is resold and the new owner simply assumes the payments, the note itself is not treated as disposed of and the seller continues installment reporting as before.

If the buyer defaults and the seller repossesses the property, Section 1038 controls the tax on the repossession. For real property, the taxable gain is limited to the lesser of two amounts: the payments received to date less the gain already reported, or the original gross profit less both the gain already reported and repossession costs such as court fees, legal expenses, and recording costs.² The seller’s basis in the repossessed property becomes the remaining basis in the note plus the repossession gain recognized plus repossession costs paid.¹⁵ That figure is the starting point for any later resale or renewed depreciation.

1
Internal Revenue Service. Topic No. 705, Installment Sales
2
Internal Revenue Service. Publication 537, Installment Sales
3
Internal Revenue Service. Instructions for Schedule B (Form 1040) – Section: Seller-Financed Mortgages
4
Internal Revenue Service. Rev. Rul. 2026-2 Table 1, Applicable Federal Rates for January 2026
5
Office of the Law Revision Counsel. 26 U.S. Code 1274
6
Office of the Law Revision Counsel. 26 U.S. Code 483
7
Office of the Law Revision Counsel. 26 U.S. Code 1411 – Imposition of Tax
8
Internal Revenue Service. Topic No. 559, Net Investment Income Tax
9
Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction
10
Internal Revenue Service. Topic No. 504, Home Mortgage Points
11
Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID
12
Internal Revenue Service. Backup Withholding
13
Internal Revenue Service. Publication 15 (2026), Employer’s Tax Guide
14
Office of the Law Revision Counsel. 26 U.S. Code 453 – Installment Method
15
eCFR. 26 CFR 1.1038-1 – Reacquisitions of Real Property in Satisfaction of Indebtedness