Section 453: Installment Sale Taxation, Recapture, and Reporting

Section 453 of the Internal Revenue Code contains the installment sale rules the IRS uses to let sellers spread capital gains tax across the years they actually collect the money. Instead of paying the full tax bill in the year of closing, each principal payment you receive carries a taxable portion and a tax-free return of your basis, so the tax follows the cash. The method applies automatically to any qualifying sale where at least one payment lands after the tax year of the sale.¹

What Counts as an Installment Sale

The definition is broad. Any sale of property where at least one payment will be received after the close of the tax year of sale qualifies.¹ Monthly payments over ten years qualify. So does a single balloon due three years after closing. If any portion of the price crosses the calendar-year line, you have an installment sale.

No election is required to use the method. It applies by default. You only need to file paperwork if you want out.²

Property That Does Not Qualify

Several categories are flatly excluded, and getting this wrong at the outset means the deferral you planned on doesn’t exist:

Inventory. Personal property that would sit in your year-end inventory must be reported under your regular accounting method.³
Dealer dispositions. If you regularly sell the same type of personal property on an installment plan, or you hold real property for sale to customers in the ordinary course of business (a home builder selling houses, for instance), the sale is a dealer disposition and doesn’t qualify.¹
Publicly traded stock and securities. The full payment is treated as received in the year of sale.³
Revolving credit plans. Sales of personal property under revolving credit are excluded.³
Sales at a loss. The method only reaches gains. A loss goes on the year-of-sale return in full.

Sales that commonly do qualify include investment real estate, undeveloped land, rental buildings, and certain business equipment.⁴

How Each Payment Is Taxed

The mechanic is a single ratio called the gross profit percentage. You calculate it once at the time of sale and apply it to every principal payment for the life of the note.²

Divide the gross profit by the contract price. Gross profit equals the selling price minus your adjusted basis for installment sale purposes. Contract price is generally the total the buyer will pay you. Selling expenses (commissions, attorney fees, closing costs) are added to basis before the gross profit calculation, not subtracted from the selling price.²

A Worked Example

You sell investment land for $200,000. Your original basis is $80,000 and you paid $10,000 in selling expenses. Adjusted basis is $90,000. Gross profit is $110,000. Contract price is $200,000. Gross profit percentage is 55%. When a $20,000 principal payment arrives, you report $11,000 as capital gain and treat $9,000 as a tax-free return of basis. Any interest the buyer pays on the note is reported separately as ordinary income.²

Depreciation Recapture Is Not Deferred

If the property is depreciable, the gain attributable to depreciation recapture under Sections 1245 or 1250 must be recognized in the year of sale, whether or not any principal has been collected.⁵ That recapture is taxed as ordinary income. Only the gain above the recapture amount qualifies for installment treatment.

The practical consequence for a heavily depreciated rental property is a real year-one tax bill even when the payments stretch out over a decade. There is no way to defer the recapture piece.

When the Buyer Assumes a Mortgage

If the buyer assumes an existing mortgage or takes the property subject to one, the assumed mortgage reduces the contract price, but only up to your adjusted basis in the property.⁴

Any excess over basis is treated as a payment received in the year of sale. Sell land carrying a $60,000 mortgage when your adjusted basis is $40,000, and $20,000 counts as a deemed payment at closing. In extreme cases where the mortgage far exceeds basis, the gross profit percentage can hit 100%, and every future payment becomes fully taxable.⁴

Sales to Related Parties

You can sell on installments to a relative or a controlled entity, but Congress built in an anti-abuse rule. If the related buyer resells the property within two years, the amount they collect on the resale is treated as if you received it at that moment, accelerating your tax.³

The concern is straightforward. Without this rule, you could sell appreciated property to a family member on a long note, the family member could resell for cash the next week, and the family would hold the cash while your tax bill sat 20 years in the future. For marketable securities, there is no time limit at all; a related-party resale triggers acceleration whenever it happens.³

The two-year clock pauses if the related party reduces their risk of loss through a put option, a short sale, or a similar arrangement. An exception applies where you can show the IRS that neither the original sale nor the resale had tax avoidance as a principal purpose.³

A stricter rule applies to depreciable property sold to a related person. Installment treatment is disallowed entirely: all payments are treated as received in the year of sale, and the buyer’s basis step-up is delayed until you report the corresponding income.³ The only escape is proving that tax avoidance was not a principal purpose. Related persons include family members (spouses, siblings, ancestors, lineal descendants), controlled entities where you own more than 50%, and certain affiliated partnerships.

Interest Charge on Large Installment Obligations

Section 453A adds a cost for sellers carrying big obligations. If the sale price of the property exceeds $150,000 and the total face amount of all your year-end installment obligations from sales during the year exceeds $5,000,000, you owe an interest charge on the deferred tax attributable to those obligations.⁶

The charge reaches only the portion above the $5,000,000 floor. Carry $7,000,000 in qualifying obligations at year-end and the interest runs on the $2,000,000 excess. The rate is the IRS underpayment rate, which is high enough to erase most of the time-value benefit of deferral on very large deals.

Pledging the Note as Collateral

Section 453A also closes an obvious workaround. If you pledge an installment obligation as collateral for a loan, the net loan proceeds are treated as a payment received on the note.⁶ You owe tax on the gain portion of those deemed proceeds as if the buyer had paid you directly. Later actual payments from the buyer are ignored until they catch up to what you already reported through the pledge. The pledge rule applies only to obligations above the $150,000 sale-price threshold, but within that range it destroys the deferral.

The Note Must Charge Adequate Interest

Every installment contract has to carry adequate interest. If it charges too little (or none), the IRS recharacterizes part of each principal payment as disguised interest, taxed as ordinary income rather than capital gain.²

The minimum, called the test rate, is drawn from the Applicable Federal Rate the IRS publishes monthly. It’s the lowest AFR in effect during the three-month window ending with either the month the contract was signed or the month of closing, whichever yields the lower rate. For seller-financed sales of $7,296,700 or less (an inflation-adjusted figure), the test rate is capped at 9% compounded semiannually. For land transfers between related parties, the cap drops to 6%.²

When stated interest falls short, the IRS imputes the difference under Section 483 (unstated interest) or Section 1274 (original issue discount). The selling price drops, interest income rises, and character shifts from capital gain to ordinary income. Checking the current AFR before signing is the simplest way to avoid this.

Electing Out of the Installment Method

You can choose to report the entire gain in the year of sale. You do it by reporting the sale on Form 8949, Form 4797, or both instead of Form 6252, by the due date of the return (including extensions) for the year of sale. Miss that deadline and you get an automatic six-month extension to file an amended return marked “Filed pursuant to section 301.9100-2” at the top.²

Think hard before electing out. Once made, the election can only be revoked with IRS approval, and the IRS won’t grant a revocation if a purpose is avoiding federal income tax or if the tax year in which any payment was received has already closed.¹ Revocations are rare in practice. The typical reasons to elect out are an expected jump into a higher bracket in later years, or capital losses in the year of sale that would otherwise absorb the gain.

If the Buyer Defaults

When a buyer stops paying and you take back real property, Section 1038 controls, and it isn’t optional.⁷

The gain on repossession equals the total cash and other property (excluding the buyer’s note) you received before reacquisition, minus the gain you already reported in prior years. A ceiling applies: the original profit on the sale, reduced by gain previously reported and by any costs of reacquiring the property.⁷

If you already reported most of the gain on payments received before the default, the additional gain on repossession is often small. Your new basis in the reacquired property is the adjusted basis of the cancelled note, plus gain recognized on repossession, plus reacquisition costs. That prevents double taxation of the same economic gain.

How to Report It

The reporting form is Form 6252, Installment Sale Income. File it in the year of sale to establish the gross profit percentage, and file it again in every year you receive a payment.² For sales to a related party, you may need to file Form 6252 every year until the note is paid off, even in years you receive nothing.

Gains from Form 6252 flow onward depending on what you sold. Capital gains on personal-use or investment property go to Schedule D. Gains on business property, including any ordinary income component, go to Form 4797.² Interest the buyer pays on the note is reported separately as ordinary income and does not appear on Form 6252.

Spreading gain across years has a bracket effect worth planning around. Splitting a single large gain over several returns can keep you inside the 15% long-term capital gains bracket instead of pushing into the 20% bracket in one year. The 3.8% Net Investment Income Tax on investment gains also applies each year a payment is recognized, so the year-by-year math matters for that surtax as well.

1
Office of the Law Revision Counsel. 26 USC 453 Installment Method
2
Internal Revenue Service. Publication 537 (2025), Installment Sales
3
Office of the Law Revision Counsel. 26 U.S. Code 453 – Installment Method
4
eCFR. 26 CFR 15a.453-1 – Installment Method Reporting for Sales of Real Property and Casual Sales of Personal Property
5
Internal Revenue Service. Topic no. 705, Installment Sales
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Office of the Law Revision Counsel. 26 U.S. Code 453A – Special Rules for Nondealers
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eCFR. 26 CFR 1.1038-1 – Reacquisitions of Real Property in Satisfaction of Indebtedness