Casualty Loss

A casualty loss is the damage, destruction, or loss of property caused by a sudden, unexpected, or unusual event. These events are not part of normal wear and tear and occur quickly.

Common causes include natural disasters, accidents, or criminal acts.

⚠️ Qualifying Events

To qualify as a casualty loss for tax purposes, the event must be all three of the following:

• Sudden – happens quickly (not over time)
• Unexpected – not anticipated or routine
• Unusual – not part of normal property use

Examples of Qualifying Events

• Hurricanes, floods, tornadoes, earthquakes
• Fires or explosions
• Vandalism or theft
• Vehicle accidents
• Government‑ordered demolition resulting from an unsafe condition caused by a disaster

🚫 Does NOT qualify:

• Gradual damage (termites, mold, erosion)
• Normal wear and tear
• Decline in property value without physical damage

🧾 Tax Treatment by Property Type

🔹 Personal‑Use Property (Home, Car, Personal Belongings)

Personal casualty losses are deductible only if caused by a federally declared disaster.

• Must itemize deductions unless claiming a qualified disaster loss
• Deduction is limited by:
  • $100 reduction per event
  • 10% of Adjusted Gross Income (AGI)
• Reported on Form 4684 and Schedule A

🔹 Business or Income‑Producing Property

Casualty losses involving business, rental, or income‑producing property are deductible under IRC Section 165.

• No $100 reduction
• No 10% of AGI limit
• Loss is generally:
  • Adjusted basis of the property
  • Minus insurance or other reimbursements
  • Minus salvage value (if any)

Reported on Form 4684 and the applicable business schedule.

📉 How to Calculate a Casualty Loss

1. Determine the fair market value (FMV) of the property before and after the event
2. Calculate the decrease in FMV
3. Compare the decrease in FMV to the adjusted basis
   • Use the smaller of the two amounts
4. Subtract insurance or other reimbursements
5. Apply any applicable limits:
   • $100 per event
   • 10% of AGI (personal‑use property only)

🛠️ Example

A tornado damages a taxpayer’s personal residence.

• FMV before disaster: $250,000
• FMV after disaster: $150,000
• Decrease in FMV: $100,000
• Insurance reimbursement: $80,000

Casualty loss before limits: $100,000 − $80,000 = $20,000

If this is personal‑use property:

• Subtract $100 per event
• Subtract 10% of AGI
• The remaining amount may be deductible

📄 Special Rules for Qualified Disaster Losses

Certain federally declared disasters qualify for special tax relief.

For qualified disaster losses:

• Taxpayers may deduct the loss without itemizing
• A $500 per event reduction applies
• The 10% of AGI limitation does not apply
• Taxpayers may elect to claim the loss on the prior‑year return to receive refunds sooner

✅ These rules apply only to disasters specifically designated by the IRS.