Section 1033 — Involuntary Conversion Gain Deferral
When property is destroyed, stolen, condemned, or seized — and the owner receives insurance proceeds, condemnation awards, or other compensation that exceeds the property's tax basis — a taxable gain is recognized. But the owner didn't choose to sell; the property was taken or destroyed against their will. 26 U.S.C. § 1033 addresses this inequity: if the owner uses the compensation to purchase replacement property that is "similar or related in service or use" within a specified replacement period, the recognized gain can be deferred (not permanently excluded, but pushed into the basis of the replacement property). § 1033 is the involuntary analog to the voluntary § 1031 like-kind exchange — both allow real estate and property owners to roll gain into replacement property without immediate tax. But unlike § 1031 (which requires advance planning), § 1033 is available retroactively when property is involuntarily converted. It applies to individuals, businesses, farmers, and landlords — any property owner who suffers an involuntary conversion.
Current Law (2026)
| Parameter | Value |
|---|---|
| Governing provision | 26 U.S.C. § 1033 |
| Types of involuntary conversion covered | Destruction (fire, flood, hurricane, earthquake), theft, seizure, condemnation/eminent domain, threat of condemnation |
| Gain deferral available | If proceeds are reinvested in "similar or related in service or use" replacement property within the replacement period |
| Replacement period — general | 2 years after the close of the taxable year in which gain is first realized |
| Replacement period — real property condemned | 3 years for real property held for use in a trade or business or investment that is condemned (not destroyed) |
| Replacement period — Presidentially declared disaster | 4 years (extended from normal 2-year period) for property in a presidentially declared disaster area |
| Gain recognition if no replacement | Full gain recognized in the year of conversion |
| Gain recognition with partial replacement | Gain recognized to the extent proceeds exceed the cost of replacement property |
| Basis of replacement property | Reduced by the amount of deferred gain (gains are built into the new property) |
| Election required | Yes — § 1033 election must be made (typically with an amended return or protective election) |
Legal Authority
- 26 U.S.C. § 1033(a) — General rule: if property is compulsorily or involuntarily converted into money or property similar or related in service or use to the converted property as a result of its destruction, theft, seizure, requisition, or condemnation, the gain is recognized only to the extent that the amount realized (insurance proceeds, condemnation award) exceeds the cost of replacement property; if no replacement is made, gain is fully recognized
- 26 U.S.C. § 1033(b) — Basis of replacement property: the basis of replacement property equals the cost of that property reduced by the amount of unrecognized gain; this ensures the deferred gain is preserved and will be recognized when the replacement property is eventually sold
- 26 U.S.C. § 1033(a)(2)(B) — Replacement period: the taxpayer must purchase replacement property within 2 years after the close of the first taxable year in which any part of the gain is realized; extended to 3 years for condemned real property held for business/investment; extended to 4 years for disaster losses in Presidentially declared disaster areas
- 26 U.S.C. § 1033(g) — Real property condemnation: when real property held for use in a trade or business or for investment is condemned, the "similar or related in service or use" standard is replaced with a like-kind standard (the same standard as § 1031 exchanges) — making replacement much easier for condemned business/investment real estate
- 26 U.S.C. § 1033(h) — Principal residence: special rules apply when a principal residence is involuntarily converted; proceeds can be reinvested in any new principal residence; the § 121 home sale exclusion applies first, potentially eliminating gain entirely before § 1033 applies to any remaining gain
How It Works
The key distinction in § 1033 is the standard for replacement property. For non-real-property conversions and destroyed real property, the "similar or related in service or use" test applies: the replacement must serve the same function as the converted property — same end use, not merely the same type. A grocery store building rented to a grocery tenant must be replaced with another similar retail rental; an owner-operated gas station that burns down must be replaced with another owner-operated gas station. This is stricter than § 1031's like-kind standard. For condemned (not destroyed) business or investment real property, § 1033(g) broadens the standard: any real property that qualifies as "like-kind" under § 1031 will do, giving condemned property owners much more flexibility — you can replace an office building with industrial land or a rental house with commercial real estate. § 1033 also doesn't require all-or-nothing reinvestment: if insurance proceeds are $500,000 and you buy replacement property for $400,000, you recognize $100,000 gain (the uninvested portion) and defer the rest into the replacement property's basis; if you reinvest more than the proceeds, no gain is recognized at all.
The replacement period clock begins with the year of conversion (the year proceeds are received or the condemnation award paid) and extends 2–4 years depending on the type of conversion; the IRS has historically been accommodating with disaster-related extension requests. When a principal residence is destroyed or condemned, § 1033(h) provides that the § 121 exclusion ($250,000/$500,000 for married couples) applies first — if gain doesn't exceed the exclusion, no § 1033 election is needed; excess gain can be deferred by reinvesting proceeds into a new primary residence within the replacement period. When timing is uncertain, a protective § 1033 election filed with your return notifies the IRS of the conversion and intention to replace without committing to the deferral, preserving flexibility while the situation develops.
How It Affects You
<!-- pria:personalize type="eligibility" -->If your home or property was destroyed in a fire, hurricane, or flood: § 1033 can significantly reduce or eliminate the tax bill you'd otherwise owe on insurance proceeds. First, apply § 121 — if it's your primary residence and the gain is under $250,000 ($500,000 for married filing jointly), you may owe nothing. For larger gains, or for properties that don't qualify for § 121 (rental properties, vacation homes, business property), § 1033 lets you roll the insurance proceeds into replacement property without paying tax now. See a tax professional promptly — the replacement clock is already running from the year you first receive insurance proceeds.
If your property was condemned by a government (eminent domain): The condemnation award you receive may be substantially more than your tax basis, especially for property held long-term. Under § 1033(g), because this is a condemnation (not a destruction) of business or investment real property, you can use the broader like-kind standard — almost any real property held for business or investment qualifies as replacement. The 3-year replacement period gives you more time than a simple destruction. Keep meticulous records of when you received the condemnation award — that starts your replacement clock.
If your business property was destroyed: The "similar or related in service or use" standard is stricter than for condemned real estate. You must replace the property with something that serves the same function. If you run a restaurant and it burns down, replacement with another restaurant building you operate qualifies; replacement with a retail strip mall you rent to tenants likely does not. Consider whether the condemnation rules under § 1033(g) might give you more flexibility — if the government threat of condemnation (not yet completed) precipitated your decision to sell, you might qualify for condemned-property treatment.
If you received a theft loss insurance payment: § 1033 applies to theft as well as physical destruction. If stolen property was covered by insurance and you received proceeds exceeding your basis, gain is recognized — but § 1033 allows deferral if you reinvest in similar replacement property within 2 years.
<!-- /pria:personalize -->State Variations
Most states with income taxes conform to § 1033 and allow the same deferral at the state level. California, which often differs from federal tax treatment, generally conforms to § 1033 with minor differences. States that have their own capital gains tax regimes (Oregon, Massachusetts) typically also conform to § 1033 deferral, so the state gain deferral is available in parallel with the federal deferral.
Pending Legislation
- Replacement period extensions: Congress has repeatedly enacted special extensions of the § 1033 replacement period for specific major disasters — Hurricane Katrina (5 years), Hurricane Harvey/Irma/Maria (multiple years). Legislation to create a standing automatic 4-year period (instead of requiring case-by-case Congressional action) for major disaster areas has been introduced.
- California wildfires: Congress has enacted specific extended replacement periods for taxpayers in California wildfire disaster areas, responding to the scale of property destruction in recent wildfire seasons.
Recent Developments
- 2025 Los Angeles wildfires created the largest modern § 1033 event for residential property: The January 2025 Palisades and Eaton fires destroyed more than 16,000 structures in Los Angeles County — the most destructive wildfire in California history. Many destroyed homes had been owned for decades, with very low tax basis and replacement values of $1–5 million or more. After applying the § 121 exclusion ($250,000/$500,000), many homeowners still face six- to seven-figure taxable gains. The IRS issued a notice extending the § 1033 replacement period for taxpayers in the presidentially declared disaster area. Given Southern California's severe housing supply constraints, finding qualifying replacement property within even the extended period is a genuine challenge — and the LA rebuild timeline stretches years.
- IRS issued multiple disaster-area replacement period extensions (2024–2025): The IRS extended § 1033 replacement periods for taxpayers affected by Hurricanes Helene and Milton (both 2024), several Midwest and Appalachian flooding events, and the 2025 Los Angeles wildfires. Each extension notice lists specific counties and extends the deadline to the later of the normal period end date or one year after the President's major disaster declaration. Taxpayers affected by multiple overlapping disasters should confirm their specific deadlines — different counties can have different extension dates even within the same disaster.
- California wildfire serial losses create compounding § 1033 complexity: Taxpayers who replaced property after the 2017, 2018, or 2020 California wildfires — embedding deferred gain in their replacement property — then lost that replacement property in subsequent fires now face a chain of § 1033 elections with accumulated deferred gain. Each conversion embeds the prior deferred gain into the replacement property's basis. Wildfire tax practitioners report that tracking basis through two or three sequential involuntary conversions (each time the deferred gain compounds) has become a significant technical challenge. The IRS has not issued specific guidance for serial-disaster § 1033 chains.
- TCJA casualty loss restriction creates mandatory § 1033 vs. deduction choice: The Tax Cuts and Jobs Act of 2017 suspended personal casualty loss deductions except for losses in federally declared disaster areas. A taxpayer who suffers a qualifying disaster loss must choose between a casualty loss deduction and § 1033 deferral — they cannot claim both for the same property. For high-value properties where insurance proceeds exceed basis by hundreds of thousands, § 1033 deferral is almost always more valuable than a deduction, but the choice requires calculating both paths. Also see § 1031 Like-Kind Exchanges for voluntary deferral and § 139 Disaster Relief Exclusion for excludable disaster assistance payments.