Natural disasters, fires, floods, hurricanes, and theft can cause devastating financial losses. Many taxpayers assume the federal tax code automatically allows them to deduct those losses. However, the Tax Cuts and Jobs Act (TCJA) significantly limited casualty loss deductions for individuals.
Understanding when a casualty loss is deductible—and when it is not—is critical for taxpayers recovering from unexpected disasters.
This article explains how casualty losses work under federal tax law, the limits imposed by the TCJA, and when taxpayers may still claim a deduction.
The Legal Foundation: IRC §165
The deduction for casualty and theft losses comes from Internal Revenue Code §165, which governs losses.
26 U.S.C. §165(a) provides:
“There shall be allowed as a deduction any loss sustained during the taxable year and not compensated for by insurance or otherwise.”
However, the statute restricts how individuals may claim such losses.
Under IRC §165(c):
“In the case of an individual, the deduction under subsection (a) shall be limited to—
(1) losses incurred in a trade or business;
(2) losses incurred in any transaction entered into for profit; and
(3) except as provided in subsection (h), losses of property not connected with a trade or business if such losses arise from fire, storm, shipwreck, or other casualty, or from theft.”
In plain English, this means:
• Business losses are generally deductible
• Investment losses may be deductible
• Personal casualty losses are only deductible in limited circumstances
How the TCJA Changed Casualty Loss Deductions
Before 2018, taxpayers could deduct many personal casualty losses (subject to thresholds).
However, the Tax Cuts and Jobs Act dramatically narrowed this deduction.
Under IRC §165(h)(5), personal casualty losses are now deductible only if the loss occurs in a federally declared disaster area.
The statute states:
“In the case of an individual, any personal casualty loss shall be allowed only to the extent it is attributable to a Federally declared disaster.”
This means:
Most homeowners cannot deduct property losses from events like:
• House fires
• Theft
• Localized storms
• Accidental property damage
unless the event is declared a federal disaster by the President.
What Counts as a “Casualty”
The IRS defines a casualty as damage, destruction, or loss of property resulting from a sudden, unexpected, or unusual event.
Examples include:
• Hurricanes
• Tornadoes
• Floods
• Wildfires
• Earthquakes
• Terrorist attacks
Events that do NOT qualify typically include:
• Normal wear and tear
• Progressive deterioration
• Termite damage
• Mold developing slowly over time
The key factor is that the event must be sudden and unexpected.
Calculating a Casualty Loss
Even when a casualty loss is deductible, the calculation can be complex.
The IRS generally requires taxpayers to determine:
- The decrease in fair market value of the property
- The adjusted basis of the property
- Any insurance reimbursements
The deductible loss is typically the lesser of the decrease in value or the taxpayer’s adjusted basis, minus reimbursements.
Additional limits apply.
Under IRC §165(h)(1):
• Each casualty event is reduced by $100
• The total loss is further reduced by 10% of adjusted gross income
These thresholds prevent minor losses from generating tax deductions.
Special Disaster Relief Rules
Congress sometimes creates special disaster tax relief for major events.
For example, taxpayers affected by hurricanes or wildfires may be allowed to:
• Deduct losses without itemizing deductions
• Waive the 10% AGI limitation
• Claim the deduction on the prior year’s tax return to obtain a faster refund
These rules vary depending on the legislation passed after each disaster.
Business vs Personal Casualty Losses
It is important to distinguish personal property losses from business losses.
The TCJA restrictions apply mainly to personal losses.
If the damaged property is used in a trade or business, the loss may still be deductible under IRC §165(c)(1) without the federally declared disaster requirement.
Examples include:
• A restaurant destroyed by fire
• Equipment damaged by flooding
• A rental property hit by a hurricane
These losses may also qualify for additional depreciation or replacement rules.
Why Casualty Loss Rules Matter
Many taxpayers discover the limitations on casualty deductions only after suffering a major loss.
Common misconceptions include:
• “All property damage is deductible.”
• “Insurance claims always determine the deduction.”
• “You can write off a house fire automatically.”
In reality, the federally declared disaster rule introduced by the TCJA dramatically reduced the availability of these deductions.
Understanding the law ahead of time can help taxpayers:
• Document losses properly
• Coordinate insurance claims
• Claim available tax relief when disasters occur
When to Speak With a Tax Professional
Casualty loss calculations can involve complex issues such as:
• Determining property basis
• Calculating fair market value changes
• Handling partial reimbursements
• Applying disaster-relief provisions
A qualified tax professional can help ensure the deduction is calculated correctly and supported with proper documentation.
Conclusion
The federal tax code still allows casualty loss deductions, but the Tax Cuts and Jobs Act significantly limited them. Today, most personal losses are deductible only if they occur in a federally declared disaster area.
Understanding the rules under IRC §165 can help taxpayers navigate difficult financial situations and avoid mistakes when claiming disaster-related deductions.
At Dino Tax Co, we help clients navigate tax matters ranging from unfiled returns to IRS letters and levies and everything in between with clarity and confidence. If you’d like guidance on your situation, schedule a consultation today. Call or text (713) 397-4678 or email davie@dinotaxco.com. We’re here to help you take the next step.
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