Real Estate Tax Calc
What triggers Section 1033
An involuntary conversion occurs when your property is destroyed (by fire, flood, hurricane, or other casualty), condemned by a government authority, or stolen. When you receive insurance proceeds, condemnation awards, or other compensation, you recognize a taxable gain if those proceeds exceed your adjusted basis in the property.
Section 1033 allows you to defer that gain if you reinvest the proceeds in similar-use replacement property within the prescribed time window. Unlike a 1031 exchange, there is no qualified intermediary required — you receive the proceeds directly and then replace the property.
Replacement window and like-kind vs. similar use
The replacement deadline is generally two years after the end of the tax year in which the conversion occurs. For condemnations, the window is three years. You must commit to replacement by that deadline by actually purchasing or constructing the replacement.
Section 1033 uses a "similar or related in service or use" standard rather than the "like-kind" standard of a 1031 exchange. This is actually more restrictive in some ways — the replacement property must serve a similar function to the converted property. A landlord whose rental house burned down must replace it with another property used in the same way (another rental), not just any real property.
How the deferral works
If you receive $500,000 in insurance proceeds for a rental with an adjusted basis of $200,000, you have a $300,000 gain. If you reinvest all $500,000 into replacement property, the entire $300,000 gain is deferred. The replacement property's basis is reduced by the deferred gain ($500,000 cost − $300,000 deferred gain = $200,000 basis).
If you only reinvest $450,000, you recognize $50,000 of gain ($500,000 − $450,000 = $50,000 "boot" equivalent) and defer the remaining $250,000. Document the election on your tax return for the year the conversion occurs.
The special like-kind rule for condemned real property
Section 1033 normally requires replacement property that is similar or related in service or use — a stricter standard than the 1031 like-kind test. But there is an important exception. Under Section 1033(g), when real property held for productive use in a trade or business or for investment is condemned (or sold under threat of condemnation), you may replace it with like-kind real property instead of merely similar-use property. That gives condemnation victims much more flexibility: a landlord whose retail strip is condemned can roll the award into raw land, an apartment building, or a warehouse and still defer the gain, because all investment real estate is like-kind. This broader rule applies only to condemnations of real property, not to casualties or theft, and it comes with the three-year replacement window rather than two.
Depreciation recapture inside a 1033
Deferring gain under Section 1033 also defers the depreciation recapture embedded in the converted property — but only if the replacement property is of the same recapture character. Under Section 1245(b)(4) and Section 1250(d)(4), recapture is not triggered on a qualifying 1033 replacement to the extent you reinvest in property of a like character (the recapture potential carries into the replacement's basis). If you replace depreciable real property with non-depreciable property such as raw land, however, the recapture can be accelerated on the portion not reinvested in depreciable property. As with a 1031 exchange, any gain you do recognize (because you did not reinvest the full proceeds) is characterized first as recapture. Match the replacement property's character to the converted property to keep the recapture fully deferred.
A worked example with a rental building
Suppose a fire destroys a rental building. Your adjusted basis is $300,000 (after $150,000 of accumulated depreciation), and the insurer pays $700,000. Your realized gain is $400,000. If you buy a replacement rental for $720,000 within the two-year window and elect Section 1033, the entire $400,000 gain — including the $150,000 of recapture — is deferred. Your basis in the new building is its $720,000 cost minus the $400,000 deferred gain, or $320,000. If instead you buy a replacement for only $650,000, you did not reinvest $50,000 of the proceeds, so you recognize $50,000 of gain now (characterized first as recapture at up to 25% or ordinary rates) and defer the remaining $350,000. Reinvesting at least the full amount realized — not just your gain — is what achieves complete deferral.
The replacement period, measured precisely
The clock is easy to miscount. The replacement period begins on the date the property is damaged, destroyed, stolen, or condemned (or, for condemnation, the earliest date of the threat or imminence of condemnation) and ends two years after the close of the first tax year in which any part of the gain is realized — usually the year you receive the proceeds. For condemned business or investment real property the period is three years. A principal residence (and its contents) destroyed in a federally declared disaster gets an extended four-year period under Section 1033(h). Because the window runs from the end of the tax year of gain realization, you often have more time than a flat 'two years from the fire' would suggest — but confirm the exact dates before relying on it.
Making, and unwinding, the election
There is no qualified-intermediary machinery in a 1033 — the deferral is an election you make by simply not reporting the gain and attaching a statement describing the conversion, the proceeds, and your replacement intentions. If you have already replaced the property by the time you file, you report the details for that year. If you have not yet replaced it but intend to, you still report the gain as deferred and describe your plan. Then, if you fail to replace within the window (or replace for less than planned), you must file an amended return for the year of gain and pay the tax — with interest — because the deferral is retroactively lost. Keep the insurance or condemnation paperwork, proof of the replacement purchase, and a copy of the election statement in your permanent file.
How 1033 interacts with the home-sale exclusion and casualty losses
When a principal residence is involuntarily converted, two provisions can stack. First, the Section 121 exclusion ($250,000 single / $500,000 married) applies to the gain as if you had sold the home, and only the gain above the exclusion needs to be deferred under Section 1033. Second, on the loss side, a personal casualty loss is deductible only if it results from a federally declared disaster (a limitation in effect for 2018 through 2025), and only to the extent it exceeds 10% of AGI plus a $100 floor. Business and investment property casualty losses are not subject to those personal limits and are computed on Form 4684 and carried to Form 4797. The combination — exclusion, then deferral, then any deductible loss — can be intricate, so run the numbers before deciding whether to elect deferral at all; sometimes recognizing a small gain is better than locking basis into a replacement you do not want.
Same-taxpayer rule, related parties, and holding period
A few structural rules shape who can replace and how the new property is treated. The replacement generally must be acquired by the same taxpayer whose property was converted — you cannot have your spouse's separate entity or a different LLC buy the replacement and still claim your deferral, so match the ownership of the replacement to the ownership of the lost property. For larger taxpayers, Section 1033(i) restricts acquiring replacement property from a related party in certain cases, closing a loophole where a group shuffles property among affiliates. On the back end, the replacement property's basis equals its cost reduced by the deferred gain, and its holding period for capital-gain purposes generally tacks — it includes the time you held the converted property — so a quick later sale of the replacement can still qualify for long-term treatment. And because basis carries over reduced by the deferred gain, the deferred depreciation recapture rides along inside the new property and surfaces when you eventually sell it in a taxable transaction.
Frequently asked questions
How is Section 1033 different from a 1031 exchange?
A 1031 is voluntary (you choose to sell and exchange). Section 1033 applies to involuntary conversions. You receive proceeds directly, then replace — no qualified intermediary required. The replacement standard is "similar use," which is stricter than the 1031 "like-kind" standard.
How long do I have to replace condemned property?
Three years from the end of the tax year in which the condemnation occurred. Casualty and theft replacements have a two-year window.
Do I have to make an election?
If the gain would be recognized without replacement, you must elect to defer under Section 1033 on your return. If your basis exceeds the proceeds (a loss), no election is needed — there is no gain to defer.
Do I have to reinvest just my gain, or all of the proceeds?
To defer the entire gain you must reinvest at least the full amount you realized (the insurance or condemnation proceeds), not merely the gain. If you reinvest less, you recognize gain equal to the shortfall, and that recognized amount is characterized first as depreciation recapture.
Does Section 1033 defer depreciation recapture too?
Yes, to the extent you reinvest in replacement property of a like character. Under Sections 1245(b)(4) and 1250(d)(4), recapture is not triggered on a qualifying replacement, and the recapture potential carries into the new property's basis. Replacing depreciable property with non-depreciable property such as raw land can accelerate some recapture.
Can I replace condemned real estate with any kind of real estate?
Yes. Section 1033(g) lets condemned real property held for business or investment be replaced with like-kind real property, rather than the stricter similar-use standard that applies to casualties and theft — and the replacement window for condemned real property is three years.
What happens if I never buy the replacement property?
You lose the deferral retroactively. You must file an amended return for the year the gain was realized, report the gain, and pay the tax with interest. That is why you should be confident of replacing before electing to defer.
Do I need a qualified intermediary like a 1031 exchange?
No. Section 1033 has no intermediary requirement. You receive the proceeds directly and then acquire the replacement property yourself within the statutory window — one of the practical differences from a 1031 exchange.
Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.