The Internal Revenue Code
Statutory authority — the foundation and the eligibility screens.
1.1 · IRC §453 — Installment Method
§453(a) makes the installment method the default rule: "income from an installment sale shall be taken into account … under the installment method." §453(b)(1) defines an installment sale as "a disposition of property where at least 1 payment is to be received after the close of the taxable year in which the disposition occurs." §453(c) supplies the formula — each year's recognized gain equals payments received × gross profit percentage (gross profit ÷ total contract price).
This is the entire statutory basis for the SIS. The SIS is simply an installment sale in which payments are structured over a fixed schedule and funded by an annuity. Because §453 is the default rule, an SIS does not require an affirmative election — it requires the seller to refrain from electing out. Gain is recognized only as each scheduled payment is received, which is the deferral benefit the SIS delivers. The "at least one payment after the close of the tax year" requirement is why even a two-payment SIS works.
1.2 · IRC §453(d) — Electing Out
A taxpayer may elect not to use the installment method, recognizing all gain in the year of sale. The election must be made by the return due date (including extensions) for the year of sale and is revocable only with IRS consent.
This is the inverse safeguard. Because §453 is automatic, the SIS seller must simply not elect out. A seller who wants full deferral must avoid an inadvertent election-out (e.g., by reporting the full gain on Form 8949/4797 instead of filing Form 6252). It also means the deferral decision is effectively locked at the first return.
1.3 · IRC §453(e) — Related-Party Second Dispositions (Two-Year Rule)
If a seller sells to a related person on the installment method and that related person resells the property within two years, the amount realized on the resale is treated as received by the original seller at that time — accelerating the deferred gain. "Related person" is defined by reference to §267(b) and the §318(a) attribution rules. The two-year clock is suspended while the related party's risk of loss is diminished (puts, options, short sales). An exception applies where neither disposition had tax avoidance as a principal purpose.
A planning pitfall, not a structural bar. Most SIS transactions involve an unrelated, arm's-length buyer, so §453(e) is not triggered. But if an SIS were used to sell to a family member or controlled entity, a resale within two years would collapse the deferral. Advisors screen for this before structuring.
1.4 · IRC §453(g) — Related-Party Sales of Depreciable Property
On an installment sale of depreciable property between related persons (defined under §1239(b)), the installment method does not apply — all payments are treated as received in the year of sale — unless the taxpayer shows tax avoidance was not a principal purpose.
Bars an SIS where the asset is depreciable and the buyer is a related party (e.g., selling equipment or a depreciable building to a more-than-50%-owned entity). It is a categorical screen: the SIS deferral is unavailable for that fact pattern regardless of how the annuity is structured.
1.5 · IRC §453(i) — Depreciation Recapture Recognized in Year of Sale
"Any recapture income shall be recognized in the year of the disposition" — notwithstanding the installment method. Only gain in excess of recapture income may be deferred. Recapture income is the §1245 (personal property) or §1250 (real property, excess-over-straight-line) amount computed as if all payments were received in the year of sale.
A crucial limitation on how much gain an SIS can defer. For a depreciated commercial building or equipment, the §1245/§1250 recapture is taxed up front in the year of sale even though the seller receives no cash for it that year. Only the remaining capital gain flows into the annuity-funded installment stream. For heavily cost-segregated real estate, this can be a substantial non-deferrable slice. Note: unrecaptured §1250 gain (the straight-line component, max 25% rate) is not §453(i) recapture and can be deferred.
1.6 · IRC §453(k) — Publicly Traded Securities & Revolving Credit Exclusion
The installment method is unavailable for dispositions of stock or securities traded on an established securities market, property regularly traded on an established market (to the extent of regulations), and revolving-credit-plan personal property. All payments are treated as received in the year of disposition.
Defines an excluded asset class. An SIS cannot be used to defer gain on publicly traded stock — a common point of confusion. It is available for privately held business interests, real estate, and other non-traded capital assets. This is one reason the SIS is marketed to sellers of closely held businesses and investment real estate rather than to public-market investors.
1.7 · IRC §453(l) — Dealer Dispositions
"Dealer dispositions" — sales of personal property by one who regularly sells on the installment plan, and sales of real property held for sale to customers in the ordinary course — are excluded from installment treatment. Exceptions exist for farm property and for timeshares/residential lots (the latter may elect installment reporting if they pay the §453(l)(3) interest charge).
Confirms the SIS is for investment/capital assets, not dealer inventory. A real estate developer selling lots from inventory cannot SIS them; an investor selling a long-held rental property can. The dealer/investor line is a threshold eligibility question for any SIS.
1.8 · IRC §453A — Interest Charge on Large Deferred Obligations
§453A imposes an annual interest charge on the deferred tax from large non-dealer installment obligations, and contains a pledge rule. The interest charge applies when the sale price exceeds $150,000 and the taxpayer's aggregate face amount of such obligations outstanding at year-end exceeds $5,000,000. The charge equals the applicable percentage × deferred tax liability × the §6621(a)(2) underpayment rate. The pledge rule (§453A(d)) treats the net proceeds of any borrowing secured by the installment obligation as a payment received — accelerating gain.
Two distinct effects:
- Cost of deferral on large deals. An SIS seller whose obligations exceed $5M pays an annual interest charge that erodes (but does not eliminate) the deferral benefit. For individuals, this charge is treated as nondeductible personal interest (Temp. Reg. §1.163-9T), making it more punitive than for C corporations.
- The pledge rule is the firewall against monetization. Because borrowing against the installment obligation is itself treated as a payment, a bona fide SIS seller cannot quietly turn the deferred stream into present cash. This is precisely the line that abusive "monetized installment sales" tried to cross — and it is why a legitimate SIS requires genuine illiquidity.
Note on threshold: TAM 9853002 holds that married individuals each have their own $5M threshold (they are not aggregated), which can matter in joint-sale planning.
1.9 · IRC §453B — Disposition of Installment Obligations
§453B(a): if an installment obligation is "satisfied at other than its face value or distributed, transmitted, sold, or otherwise disposed of," gain or loss is triggered immediately, measured against the obligation's basis. §453B(b) defines that basis. §453B(e) contains a special rule for dispositions of installment obligations to life insurance companies.
This is the central statute for the obligor-substitution pillar. The SIS depends on the buyer's payment obligation being assigned to an assignment company without that assignment being treated as a "disposition" of the installment obligation by the seller. The governing question is whether the seller's rights are "materially altered." As the rulings below establish, a mere change in the identity of the obligor is not a §453B disposition. §453B(e) is also why the industry interposes a non-insurance assignment company as the intermediate obligor (which then buys the annuity), rather than assigning the obligation directly to the life insurer — to stay clear of the §453B(e) life-insurer rule.
1.10 · IRC §453B(a) "Material Change" Standard vs. §1001
Whether an installment obligation has been "disposed of" is governed by the §453B case-and-ruling standard — "the rights … either disappear or are materially … altered so that the need for postponing recognition of gain … ceases" — not by the more demanding §1001 "significant modification" regulations.
Confirmed by the preamble to T.D. 8675 (Part 2): the gentler, seller-rights-focused §453B standard controls. This matters because under §453B, a change in obligor alone is immaterial — exactly the change an SIS makes when the assignment company replaces the buyer.
1.11 · IRC §130 — Qualified Assignments (and why the SIS uses an NQA)
§130 lets an assignment company assume a periodic-payment liability without including the funding amount in its own gross income — but only for liabilities to make payments "on account of personal injury or sickness" that are excludable under §104(a)(1) or §104(a)(2). It requires fixed and determinable payments the recipient cannot accelerate, defer, increase, or decrease, funded by a "qualified funding asset."
§130 is categorically unavailable to the SIS, because an SIS arises from the sale of property/a business — not a physical-injury tort claim — and the seller's payments are taxable capital gain/interest, not §104 excludable damages. The SIS therefore uses a non-qualified assignment (NQA), which operates "§130-like" in mechanics (assignment company assumes the obligation, funds it with an annuity it owns) but without §130's company-level tax exclusion. The NQA structure — and its prohibition on the seller's right to accelerate, demand, or assign payments — is what preserves both §453 installment treatment and the no-constructive-receipt requirement.
1.12 · IRC §72 — Taxation of Annuities (and the §72(u) Corporate-Owner Exception)
§72 governs how amounts received as annuities are taxed (the "exclusion ratio" splits each payment into return of investment and income). §72(u) normally forces a non-natural-person (corporate) owner of an annuity to include the annuity's inside buildup in income annually — but §72(u)(3) carves out exceptions, including annuities held in connection with assignment-company obligations.
§72 is not the seller's taxing statute — the seller is taxed under §453. §72 matters one layer down: the assignment company owns the funding annuity, and §72(u)(3)'s exception is what keeps that corporate-owned annuity from generating annual phantom income for the assignment company. This is part of why the assignment-company-owns-the-annuity architecture is economically viable. The seller, by contrast, has no ownership of the annuity at all — a fact essential to avoiding constructive receipt.
1.13 · Supporting Code Sections (the surrounding framework)
| Cite | What it says | Application to SIS |
|---|---|---|
| §104(a)(1)–(2) | Excludes workers' comp and personal physical-injury damages from income | Defines the boundary of §130; because SIS payments are not §104 amounts, §130 is unavailable and an NQA is required |
| §1245 / §1250 | Recapture of depreciation as ordinary income (1245) / excess-over-straight-line (1250) | The recapture amounts feed §453(i) and must be recognized up front; they cap the deferrable gain in an SIS |
| §1274 / §483 | Imputed/unstated interest when a deferred-payment sale lacks adequate stated interest | An SIS payment stream embeds interest; these sections ensure the interest component is recharacterized and taxed as ordinary income, separate from gain |
| §1239(b) | Defines "related persons" for depreciable-property sales | Supplies the related-party test for the §453(g) bar |
| §267(b) / §318(a) | Related-party definitions and constructive-ownership attribution | Supply the "related person" test and attribution rules for §453(e) |
| §7701(o) | Codified economic-substance doctrine | The doctrine used against abusive monetized structures; a bona fide SIS has real economic substance (genuine deferral) and is not vulnerable |
| §6011 / §6111 / §6112 | Reportable/listed-transaction disclosure, material-advisor lists | Would govern disclosure if the monetized-installment-sale regulations are finalized — relevant to the abusive cousin, not the SIS itself |
| §1(h) | Maximum capital-gains rate structure | Sets the rate used to compute the §453A deferred tax liability, and frames the rate-arbitrage rationale for the SIS |