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.
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.
Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.