Personal casualty losses are losses from casualty, disaster, and theft that are not connected to a trade or business, or a transaction entered into for profit. Generally, if the loss is caused by a federally declared disaster, you may deduct personal casualty losses relating to your home, household items, and vehicles on your federal income tax return. For tax years 2018 through 2025, personal casualty losses are otherwise not deductible. A theft loss deduction is generally available, however, if the loss is due to theft related to a transaction entered into for profit. You may not deduct casualty and theft losses covered by insurance, unless you file a timely claim for reimbursement, and you reduce the loss by the amount of any reimbursement or expected reimbursement.

​Casualty losses

A casualty loss can result from the damage, destruction, or loss of your property from any sudden, unexpected, or unusual event such as a flood, hurricane, tornado, fire, earthquake, or volcanic eruption. A casualty doesn't include normal wear and tear or progressive deterioration. For tax years 2018 through 2025, a deduction is generally not available for personal casualty losses.

Federal casualty losses, disaster losses and qualified disaster losses are three categories of casualty losses that refer to federally declared disasters. The requirements for each loss vary.

If your property is personal-use property or isn't completely destroyed, the amount of your casualty loss is the lesser of:

If your property is business or income-producing property, such as rental property, and is completely destroyed, then the amount of your loss is your adjusted basis minus any salvage value or insurance or other reimbursement you receive or expect to receive.

​Theft losses

A theft is the taking and removal of money or property with the intent to deprive the owner of it. The taking must be illegal under the law of the state where it occurred and must have been done with criminal intent. The amount of your theft loss is generally the adjusted basis of your property because the fair market value of your property immediately after the theft is considered to be zero. For tax years 2018 through 2025, individual taxpayers with theft losses are allowed a deduction if the loss is due to theft related to a transaction entered into for profit.

​Insurance or other reimbursements

You must reduce the loss, whether it's a casualty or theft loss, by any salvage value and by any insurance or other reimbursement you receive or expect to receive. The adjusted basis of your property is usually your cost, increased or decreased by certain events such as improvements or depreciation. You may determine the decrease in fair market value by appraisal, or if certain conditions are met, by the cost of repairing the property.

Capital gain

When the amount you receive from the insurance or other reimbursements is more than the cost or adjusted basis of the property you will typically, subject to a few exceptions for items like inventory, have a capital gain. You must ordinarily include the gain in your income unless you're eligible to exclude or postpone reporting the capital gain. If you have a personal casualty capital gain for the tax year, you may be able to deduct the portion of the personal casualty loss not attributed to a federally declared disaster area to the extent the loss doesn't exceed the personal capital gain.

​Claiming the loss

For property held by you for personal use, you must subtract $100 from each casualty or theft event that occurred during the year after you've subtracted any salvage value and any insurance or other reimbursement. Then add up all those amounts and subtract 10% of your adjusted gross income from that total to calculate your allowable casualty and theft losses for the year.

If you have a qualified disaster loss you may elect to deduct the loss without itemizing your deductions. Your net casualty loss doesn't need to exceed 10% of your adjusted gross income to qualify for the deduction, but you would reduce each casualty loss by $500 after any salvage value and any other reimbursement.

When to deduct

Casualty losses are deductible in the year you sustain the loss, which is generally in the year the casualty occurred. You have not sustained a loss if you have a reasonable prospect of recovery through a claim for reimbursement. If you have a casualty loss from a federally declared disaster that occurred in an area warranting public or individual assistance (or both), you can choose to treat the casualty loss as having occurred in the year immediately preceding the tax year in which you sustained the disaster loss, and you can deduct the loss on your return or amended return for that preceding tax year.

Theft losses are generally deductible in the year you discover the property was stolen unless you have a reasonable prospect of recovery through a claim for reimbursement. In that case, no deduction is available until the taxable year in which you can determine with reasonable certainty whether or not you'll receive such reimbursement.

When your loss deduction exceeds your income

If your deductions, including your loss deduction, are more than your income, you may have a net operating loss (NOL). You don't have to be in business to have an NOL from a casualty.