What is an involuntary conversion?

What counts as an involuntary conversion

The publication defines the event by the cause and the payment. Your property is destroyed, stolen, condemned, or disposed of under the threat of condemnation, and you get money or property in return. Another name for it is an involuntary exchange. This publication walks through condemnations, which it describes as the process by which private property is legally taken for public use without the owner’s consent. The owner receives a condemnation award, so a condemnation is like a forced sale with the condemning authority as the buyer. For gain or loss from destruction or theft, the publication points you to Pub. 547.

Threat of condemnation counts too

You do not need a formal taking. A threat exists if a government representative or authorized public official tells you the body has decided to acquire your property, and you have reasonable grounds to believe it will be condemned if you do not sell voluntarily. A newspaper report counts when a representative confirms it. A sale to someone other than the condemning authority can also qualify when you reasonably believe the property will be condemned. The publication’s utility example is a company with condemnation power that tells you it will acquire your property by negotiation or condemnation; the threat begins when you get the notice.

Computing gain or loss

Compare your net condemnation award with the adjusted basis of the property. A larger award means gain, a smaller one means loss. If your loss is on property held for personal use, you cannot deduct it. For a main home, the publication says gain can generally be excluded as if you sold the home, up to $250,000, or $500,000 for joint filers, and the rest may be postponed by buying replacement property. If only part of your property is condemned, the cost of restoring the remainder to its former usefulness can count as replacement cost.

Postponing the gain

You must ordinarily report gain when you receive money or unlike property, but you can elect to postpone it by buying property similar or related in service or use to what was taken. To postpone all the gain, the replacement must cost at least as much as the amount realized. If it costs less, you report gain up to the unspent part of the amount realized. The basis of the replacement property is its cost reduced by the postponed gain. You can buy a controlling interest of at least 80% in a corporation that owns similar property instead. Property acquired by gift or inheritance does not qualify, and you do not have to use the actual award money.

The replacement period

The replacement period begins on the earlier of the date you disposed of the property or the date the threat of condemnation began. It generally ends 2 years after the end of the first tax year in which any part of the gain is realized. For real property held for business or investment, not including property held primarily for sale, it ends 3 years after that tax year. A main home or its contents in a federally declared disaster area gets 4 years. You can request an extension before the period ends, and extensions are usually limited to 1 year. Buying replacement property before any threat of condemnation does not count.

Worked example

Suppose a city condemns business land with an adjusted basis of $120,000 and pays a net award of $200,000. The gain is $80,000. If you buy qualifying replacement property for $170,000, the unspent part of the award is $30,000, so you report $30,000 and postpone $50,000. The basis of the replacement is $170,000 minus $50,000, or $120,000. Had you spent $200,000 or more, the whole $80,000 would be postponed. This is an illustration built from the rules above, not an example in the publication; the calculator applies the same steps.

Making the election and common mistakes

Report the election on a statement attached to your return for the year you realize the gain. If you buy the property after filing, attach a statement to the return for the year you buy it. If the replacement costs less than expected, you may need to file an amended return to report gain you cannot postpone. A person who already reported the gain can file a claim for refund if they later replace the property in time. Common mistakes are missing the replacement deadline, buying property that is not similar or related in use, assuming insurance proceeds are never taxable, and treating a personal-use loss as deductible. A professional should review the election, especially for a home or a business with several properties.

Related Publication 544 topics

More from the same IRS publication: What is a like-kind exchange?, Is a foreclosure taxable?, What is Section 1231 property?. Related tools on this site: home sale capital gain exclusion calculator, depreciation recapture calculator.

Sources

• IRS Publication 544, Sales and Other Dispositions of Assets (2025): sections “Involuntary Conversions”, “Condemnations”, “Gain or Loss From Condemnations”, “Postponement of Gain”, “Replacement period”. Read November 2, 2026.

Edition read: Publication 544 (2025), for use in preparing 2025 returns. Dollar limits and rates in this publication are for 2025; the publication notes that later legislation (P.L. 119-21) may affect federal rules, so check the current publication and form instructions for your tax year. This page summarizes the publication and does not replace it. Marked for human review.