Calculating the Casualty Deduction

April 13, 2006

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For losses of trade or business property, or property used to produce rentals or royalties, once you've calculated the amount of your loss and subtracted the amount of your reimbursement, the remainder is your deductible loss (or gain).

For losses of income-producing property that is not described above (for example, investments such as stocks, bonds, gold, silver, and works of art), your casualty losses are added to your itemized miscellaneous deductions. All of these deductions are added together, 2 percent of your adjusted gross income is subtracted, and the remainder is your deductible amount.

Limits on personal losses. For thefts or casualties of personal or family property, your deductible loss is much more strictly limited. After calculating the amount of your loss and subtracting any reimbursements, you must subtract $100 for each casualty, theft, or accident you suffered during the year, regardless of the number of items that were damaged or destroyed during the event.

If you are married filing jointly, a single $100 reduction applies for each event, but if you are filing separately, each spouse who claims a loss must subtract $100, for a total of $200 per event for jointly owned property. If only one spouse owned the property at issue and you are filing separately, that spouse is the only one who can claim a deduction (and must apply the $100 reduction).

After the first $100 is subtracted, you're not in the clear yet: you must again reduce your deductible loss by a full 10 percent of your adjusted gross income as shown on Line 37 of your Form 1040. As a result, small personal casualty losses are unlikely to bring you any tax benefits.

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The Katrina Emergency Tax Relief Act of 2005 lifts all casualty loss restrictions for victims of Hurricane Katrina. Generally, nonbusiness casualty losses are deductible only to the extent they exceed 10 percent of the taxpayer's AGI and a $100 floor. Casualty losses that arise in the Hurricane Katrina disaster area on or after August 25, 2005, and that are attributable to Hurricane Katrina are not subject to these restrictions.

Essentially, Hurricane Katrina losses are treated as a separate deduction from all other casualty losses. However, the new law does not change the fact that only taxpayers who itemize deductions can take a casualty loss.

Taxpayers in a Presidential Disaster Area have the option of deducting the loss on the return for the year in which the loss occurred (2005 for Hurricane Katrina victims) or deducting the loss on their previous-year returns (2004). Elimination of the 10 percent/$100 limits will mean larger refunds for Katrina victims who amend 2004 returns.

The Gulf Opportunity Zone Act of 2005, enacted December 21, 2005, extends the same relaxed casualty loss restrictions described above to victims of Hurricanes Rita and Wilma.

Mixed-use property. If you suffered damage to your home, part of which you were using as a home office, or to your car, which you sometimes used for business, you have mixed-use property and your loss must be proportionately divided between the two types of usage. You will actually treat the event as if it were two separate losses. The $100 and 10 percent of AGI reduction applies only to the personal portion of the loss. Some special considerations apply in the case of home offices.