Losing property to a fire, storm, or theft is stressful enough without discovering that the tax deduction you remember from years ago has gotten much narrower. Current law limits casualty and theft loss deductions significantly compared to before 2018, but the deduction hasn’t disappeared entirely.
The Federally Declared Disaster Requirement
Under current rules, personal casualty and theft losses are only deductible if they result from a federally declared disaster, such as a major hurricane, wildfire, or flood that triggers an official disaster declaration. Losses from an ordinary house fire, a burglary, or storm damage that isn’t part of a declared disaster generally aren’t deductible on your personal return under these rules.
Business Casualty Losses Are Treated Differently
If the damaged or stolen property was used in a trade or business, or was an income-producing property, the deduction rules are more generous and aren’t limited to federally declared disasters, making this an important distinction for business owners and landlords.
How to Calculate the Deductible Loss
The deduction is generally based on the smaller of the property’s decrease in fair market value or its adjusted basis, minus any insurance reimbursement you received or expect to receive. You can’t deduct a loss for property you’re fully compensated for through insurance.
The 10% AGI Threshold and $100 Reduction
For personal casualty losses that do qualify, you must reduce the loss by $100 per casualty event, and then the total deductible loss for the year is further reduced by 10% of your adjusted gross income, meaning only losses exceeding these thresholds actually produce a deduction.
Documenting Your Loss
Photos of the damage, police reports for theft, insurance claim paperwork, and receipts or appraisals establishing the property’s value before the loss are all important for substantiating a casualty or theft loss deduction if you’re ever asked to prove it.
Disaster Declarations Can Allow Amending a Prior Return
If your loss occurred in a federally declared disaster area, you may be able to choose whether to claim the loss on the current year’s return or amend the prior year’s return, which can accelerate a refund if you need the money sooner.
Frequently Asked Questions
Can I deduct a loss from a car accident? Only if it’s connected to a federally declared disaster for personal-use property, or if the vehicle is used for business, in which case ordinary business casualty loss rules apply instead.
What if my insurance doesn’t cover the full loss? You can generally deduct the unreimbursed portion, subject to the $100 and 10% AGI reduction rules for personal property losses.
Does theft of business equipment qualify even without a disaster declaration? Yes — business and income-producing property losses aren’t limited to federally declared disasters the way personal-use property losses are.
Because casualty loss rules are schecasualty and theft loss deductionduled to change again in future tax years and disaster declarations involve specific documentation requirements, a tax professional can confirm exactly what qualifies for your specific loss and location.