Content reviewed October 17, 2026 · Educational reference
How the SIS compares to 1031 exchanges, Opportunity Zones, DSTs, CRTs, plain seller notes, and a taxable lump sum.
The SIS is one of several ways to soften the tax hit on a big sale. A 1031 exchange defers tax but only for real estate bought on a tight clock. Opportunity Zones reward a 10-year investment but put capital at market risk. A Deferred Sales Trust generally uses an intermediary trust that buys for a note and then sells to the ultimate buyer; a monetized installment sale borrows against the note for cash now — two different structures, both drawing IRS scrutiny in their aggressive forms. A Charitable Remainder Trust is powerful but irrevocable and charity-focused. The SIS trades liquidity for contractually fixed, insurer-funded income and broad asset eligibility — with tax treatment dependent on eligibility, documents, actual rights, and the complete transaction.
The master comparison
| Dimension | Structured Installment Sale (SIS) | Section 1031 Exchange | Opportunity Zone | Deferred Sales Trust | Monetized Installment Sale | Charitable Remainder Trust (CRT) | Lump Sum Taxable Sale |
|---|---|---|---|---|---|---|---|
| Asset eligibility | Broad capital assets | Real property only | Capital gains → fund | Broad | Broad | Broad | Any |
| Liquidity | Low (illiquid) | Low (in property) | Low (10-yr hold) | Low–moderate (trust income) | High (loan against note) | Income only | Highest |
| Income stream | Contractually fixed periodic (insurer-funded) | Property cash flow | Fund distributions | Trust distributions | Loan now + installments | Annuity/unitrust | None |
| Credit risk | Assignment-company and insurer credit; contract-specific guarantees | Market/tenant | Market | Trust investment risk | Lender + tax risk | Trust investments | N/A |
| Complexity | Moderate | Moderate | High | High | High | High | Lowest |
| Legal certainty | §453 statutory framework; funded assignment requires analysis | High (statutory) | High | Moderate (IRS scrutiny) | High tax risk; listed-transaction designation proposed in sources reviewed | High | High |
| Business-sale fit | Strong | No | Limited | Possible | High risk | Possible | Yes |
Strategic selection framework
- Want to stay invested in real estate? Consider a 1031 exchange or a QOF.
- Charitably inclined and want a deduction? Consider a CRT.
- Comfortable with market risk for 10 years? Consider an Opportunity Zone fund.
- Want to exit and receive scheduled insurer-funded income? Consider an SIS when the asset, payment terms, credit exposure, and after-tax projection fit the seller’s needs. Eligibility and legal analysis remain necessary.
- Need all cash now? A cash sale supplies liquidity. A conventional seller note is a separate alternative for someone willing to accept deferred payments and buyer credit risk.
Two structures the SIS is often confused with are distinct from it and from each other. A Deferred Sales Trust typically involves a sale to an intermediary trust for a note followed by the trust’s sale to the ultimate buyer; receiving cash and then depositing it into a trust does not undo receipt. A monetized installment sale pairs claimed deferral with near-term borrowing and is the subject of proposed listed-transaction regulations and enforcement. Genuine deferral and absence of a loan are relevant SIS facts, but neither supplies automatic approval or eliminates every possible disclosure obligation.
Disambiguate the initials DST
A Delaware statutory trust holding real estate and a marketed Deferred Sales Trust installment arrangement are different. Neither label by itself determines federal tax treatment. Identify the actual transaction before comparing investment risk, tax rules, or fees.
Use the right law for the transaction date
The 2025 legislation changed §1202 and Opportunity Zone rules and added §1062 for qualifying farmland sales. Avoid applying an old comparison chart to every new transaction. See alternatives after 2025 for the key date distinctions.
Sources: IRC §453 — installment method; IRC §1031 — like-kind real-property exchanges; IRC §1202 — qualified small business stock; IRC §1400Z-2 — Opportunity Zone investments; IRC §1062 — qualified farmland tax-payment election; Federal Register — proposed monetized-sale listing regulations.
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