Installment Sale for Real Estate Investors (2026)

Selling a rental property in one year can push a six-figure gain into the highest brackets all at once. An installment sale — also called seller financing — lets you spread that gain over multiple years, recognizing income as you receive principal payments instead of all at once. Here's exactly how the math works, what you can and can't defer, and when this strategy makes more sense than a 1031 exchange.

What is an installment sale?

An installment sale, governed by IRC § 453, is any sale where you receive at least one payment after the tax year in which the sale closes.¹ In practice for real estate, it usually means you act as the lender — you accept a down payment, carry a promissory note secured by a deed of trust, and collect principal plus interest from the buyer over a set term.

Unlike a 1031 exchange, there's no replacement property to find, no 45-day identification deadline, and no 180-day closing window. You agree on payment terms with the buyer, record the security instrument, and report income as payments arrive each year.

How the tax math works: the gross profit ratio

Under the installment method, you don't owe tax on the entire gain when you close. Instead, you calculate a gross profit ratio — the fraction of each principal payment that represents taxable gain:

Total gain = sale price − adjusted basis (purchase price + capitalized improvements − all accumulated depreciation).
Sale price (contract price) = the full amount the buyer agreed to pay, including the face value of the seller note — not just the down payment you received at closing.

The rule that catches real estate investors: IRC §453(i)

The installment method has a critical exception: §1245 depreciation recapture must be recognized in the year of sale, regardless of how much cash you received at closing.² Under IRC § 453(i), any gain that would be §1245 ordinary income (recapture on accelerated or bonus depreciation of personal property) is front-loaded into year 1.

This hits hardest for investors who did cost segregation. A cost seg study identifies 5/7/15-year components — appliances, flooring, land improvements, electrical serving equipment — and accelerates their depreciation, often via 100% bonus depreciation under OBBBA. When you sell, every dollar of §1245 recapture on those components is ordinary income taxed in year 1, even if you only received a 10% down payment.

For investors who only took straight-line 27.5-year depreciation on a residential rental (no cost seg): §1245 recapture is typically zero. You depreciated real property (§1250 territory), not personal property. In that case, the §453(i) front-loading rule doesn't apply, and the full gain — §1250 unrecaptured gain and true LTCG alike — can be spread across installment years.

Worked example: installment sale without cost segregation

This scenario applies to the most common case — a buy-and-hold residential rental with only straight-line depreciation.

Setup: Residential rental purchased in 2012 for $400,000 (land $100K, building $300K). Investor added $40,000 of capitalized improvements. Held 14 years through 2026. No cost segregation study was done.

Depreciation taken: ($300,000 + $40,000) ÷ 27.5 years × 14 years = $173,091 (all §1250 straight-line)

Adjusted basis at sale: $400,000 + $40,000 − $173,091 = $266,909

Sale price: $700,000. Terms: $140,000 down (20%), $560,000 seller note at 5.8% interest over 8 years.

Total gain: $700,000 − $266,909 = $433,091

Gross profit ratio: $433,091 ÷ $700,000 = 61.9%

Gain composition:

• §1245 recapture: $0 (no cost seg — all depreciation on real property)
• §1250 unrecaptured gain: $173,091 (taxed at up to 25%)
• True LTCG: $433,091 − $173,091 = $260,000 (taxed at 15–20%)

Note: interest income received on the $560,000 note (~$175,000+ total over 8 years at 5.8%) is taxed at ordinary income rates each year — separate from and in addition to the gain tax above.

When cost segregation creates a §453(i) front-loading problem

Now take the same property, but assume the investor did a cost segregation study in 2012 and took 100% bonus depreciation (now restored permanently under OBBBA for property placed in service after January 19, 2025; earlier years used phased percentages) on $110,000 of personal property components identified by the study.

On a 2026 sale, §1245 recapture = $110,000 of ordinary income. Under IRC § 453(i), this entire amount is recognized in the year of sale — even though the investor only received $140,000 at closing. At a 37% bracket, that's $40,700 of tax due April 15 of the following year, before receiving most of the note principal.

The remaining gain (§1250 + LTCG) is still spread via installment — only the §1245 portion is front-loaded. But for an investor who took large bonus depreciation, this front-loading can eliminate much of the cash-flow advantage the installment method provides. Anyone who has done cost segregation should model the §453(i) impact before committing to a seller-financed exit.

See our depreciation recapture guide for the full mechanics of §1245 vs. §1250 recapture and how cost segregation shifts the recapture stack.

Installment sale vs. 1031 exchange: when each wins

See our 1031 exchange guide for the full rules, and our 1031 exchange calculator to see the exact tax deferred on your specific property. If management burden is the issue, a Delaware Statutory Trust (DST) lets you do a 1031 into passive fractional ownership — no landlord duties, still full deferral.

Structuring the seller note: AFR and imputed interest

The interest rate on your seller note has tax consequences beyond the income you earn. If you charge below the IRS Applicable Federal Rate (AFR) for the note's term, the IRS will recharacterize a portion of the principal payments as interest income under IRC § 1274 — taxing it at ordinary rates instead of the capital gain rate.⁴

The AFR is published monthly by the IRS in a Revenue Ruling, split by term:

• Short-term AFR: notes ≤3 years
• Mid-term AFR: notes 3–9 years (most seller-financed residential deals)
• Long-term AFR: notes >9 years

Check the current AFR at IRS.gov before finalizing note terms. Charging the AFR or higher avoids any imputed interest issue and keeps the tax reporting clean.

The §453A interest surcharge on large installment notes

IRC § 453A imposes an annual interest surcharge when your total outstanding installment obligations exceed $5,000,000 at year end.⁵ The surcharge = (outstanding deferred tax) × (federal underpayment rate), computed on the deferred gain. For most residential rental investors this threshold doesn't apply, but commercial property sellers and investors holding multiple concurrent installment notes should model the §453A exposure.

Electing out of installment reporting

Installment reporting is the default — it applies automatically whenever you receive a future payment. You can elect out and recognize all gain in the year of sale. This makes sense when:

• You have large net operating losses or capital loss carryforwards in the sale year that can absorb the full gain tax-free.
• You have suspended passive activity losses from the property — released in full under IRC § 469(g) on a complete disposition — large enough to offset the gain. Electing out and coordinating PAL release in one year can eliminate the tax bill entirely.
• You expect your tax rate to be higher in future years (anticipated higher income, expiring deductions) — deferral would cost more than paying now.

The opt-out election must be made on a timely filed return (including extensions). It's irrevocable for that transaction. See our passive activity loss guide for how PAL carryforward release interacts with installment sale timing.

Risks you must factor in

• Buyer default. If payments stop, you must foreclose — a process that typically takes months to over a year, costs legal fees, and may leave the property in worse condition than when you sold. A creditworthy buyer with a substantial down payment (25%+) dramatically reduces this risk.
• Property value decline. A buyer with little equity may walk away if the property drops in value. You'd recover a property worth less than the outstanding note balance, having already recognized and paid tax on gain that is now economically reversed.
• Ordinary-rate interest income. All interest you earn on the note — potentially $100K+ over a multi-year term — is taxed at ordinary income rates (up to 37%), not at favorable capital gains rates. Factor this into the total return comparison vs. a 1031 reinvestment.
• Note illiquidity. You can sell a seller note on the secondary market, but typically at a 15–30% discount to face value. Selling the note triggers gain recognition on the remaining deferred principal — you lose the deferral benefit and collect less than face value.
• No step-up at death. Unlike real property held at death (which gets an IRC § 1014 step-up eliminating all deferred gain), an outstanding installment note passes to heirs at face value. Heirs must continue recognizing gain on future payments. If estate elimination of deferred gain is part of your plan, a 1031 cascade held to death is substantially better.

When an installment sale is the right move

The strategy works best when all five conditions are met:

1. You want out of real estate and don't want to manage a replacement property (or a DST isn't attractive).
2. Minimal or no cost segregation was done — so §453(i) doesn't create a large year-1 hit.
3. The buyer is creditworthy — ideally someone with substantial assets, a track record as a landlord, and 25%+ equity in the deal.
4. You're in or near the top bracket today but expect lower income in future years — installment spreading can shift some gain into lower LTCG brackets or below NIIT thresholds.
5. You want a predictable income stream — a seller note generating 5–7% interest can serve as a bond substitute in retirement, without the active management of continued landlording.

1. IRS Publication 537 — Installment Sales (IRS.gov)
2. IRC § 453 — Installment method; IRC § 453(i) — recapture income recognized in year of disposition (Cornell LII)
3. IRS Topic No. 409 — Capital Gains and Losses; 2026 LTCG rates (IRS.gov)
4. IRC § 1274 — Imputed interest on below-AFR seller financing (Cornell LII)
5. IRC § 453A — Interest surcharge on large installment obligations exceeding $5M (Cornell LII)
6. IRS Topic No. 705 — Installment Sales overview (IRS.gov)

Tax values verified as of May 2026. §453(i) recapture front-loading: IRC §453(i)(1). §1250 unrecaptured gain: max 25% per IRC §1(h)(1)(D). LTCG 2026 thresholds: 0% ≤$49,450 single/$98,900 MFJ; 20% above $545,650 single/$613,700 MFJ per IRS Rev. Proc. 2025-40. NIIT 3.8% threshold: $200K single/$250K MFJ per IRC §1411. OBBBA 100% bonus depreciation: permanent for property placed in service after Jan. 19, 2025.