Are Hurricane Losses Tax Deductible? Form 4684 and AGI Limits

Hurricane losses are tax deductible, but the rules are narrow: the storm must trigger a federal disaster declaration for your county, insurance reimbursements reduce the loss dollar for dollar, and only the amount above 10% of your adjusted gross income produces any tax benefit. The deduction is calculated on IRS Form 4684 and, in most cases, requires itemizing on Schedule A. For certain storms that Congress designates as qualified disasters, the rules are more generous and you do not have to itemize.

The Federal Disaster Declaration Comes First

Since 2018, personal casualty losses have been deductible only when the damage results from a federally declared disaster.¹ A hurricane that flattens your neighborhood but never receives a presidential declaration under the Stafford Act produces no deduction, no matter how severe the damage. Practically every major hurricane draws a declaration, but you still need to confirm your specific county or parish is on the list. FEMA maintains a searchable database of declarations, where you can find the DR- or EM- number you will need on the tax form.²

One boundary worth naming: rental homes and other business or income-producing property follow different rules and do not require a federal declaration to generate a deductible loss.³ Everything below applies to personal-use property: your home, your car, your belongings.

How Much of the Loss You Can Actually Deduct

The starting figure is not what it costs to make you whole. It is the lesser of two numbers: the decrease in your property’s fair market value because of the storm, or your adjusted basis in the property.¹

The value drop is the difference between what the property was worth immediately before the hurricane and immediately after. Adjusted basis is generally your original purchase price plus permanent improvements: a new roof, a room addition, upgraded plumbing. Say you bought a house for $200,000 and put $50,000 into improvements over the years. Your adjusted basis is $250,000. If the storm knocked $180,000 off the fair market value, your starting loss is $180,000, because that is the smaller of the two numbers.

Repair Costs and the Safe Harbor

A formal before-and-after appraisal is the cleanest evidence, but the IRS accepts repair costs as a proxy for the drop in value if the repairs actually got done, addressed only storm damage, did not upgrade the property beyond its pre-storm condition, and were not excessive.¹

For personal-residence losses of $20,000 or less, there is a safe harbor. Get two itemized estimates from independent licensed contractors describing what it would cost to restore the home to its pre-storm state, and use the lower of the two as your decrease in fair market value.¹ For moderate damage, this is usually where to start.

Cars and Personal Belongings

Each item is its own loss calculation. For a vehicle, the IRS points to established pricing guides published by automobile organizations, adjusted for mileage and condition. A dealer’s trade-in offer does not count as a reliable value.¹ Hold onto purchase records and any pre-storm photos. The lesser-of rule applies to each item just as it does to the house.

Insurance Reduces the Loss Whether You Collect or Not

The insurance rule is where most filers slip. You must subtract not only reimbursements already received, but any you reasonably expect to receive.¹ If your policy covers the damage and you have filed a claim, you cannot deduct the covered portion, even if the check has not arrived.

When you file before the settlement is final, estimate the reimbursement and reduce the loss by that estimate. If you later receive less than expected, claim the additional loss in the year the final determination arrives. If you receive more, the excess may need to be reported as income.

Here is the sharpest edge in the whole area: if your insurance would have covered part of the loss but you did not file a timely claim, the covered portion is not deductible.⁴ You cannot manufacture a deduction by skipping the claim. Federal disaster grants and any forgiven portion of a federal disaster loan also count as reimbursements that shrink the deductible loss.¹

The $100 Floor and the 10% AGI Threshold

After subtracting insurance, two more reductions apply. Each casualty event is cut by $100. A single hurricane that damages your house and your car is one event with one $100 reduction, not two.³

Then the total of all your casualty losses for the year, after each event’s $100 reduction, is deductible only to the extent it exceeds 10% of your adjusted gross income.³ If your AGI is $80,000, only losses above $8,000 do anything for your tax bill. This is the reason many homeowners with moderate damage or higher incomes end up with no deduction at all.

Qualified Disaster Losses Have Better Rules

Congress periodically enacts enhanced treatment for what the IRS calls qualified disaster losses. When those rules apply, the per-event floor rises from $100 to $500, but the 10% AGI threshold disappears entirely.¹ Losing $400 more per event to save potentially thousands to the AGI threshold is a strong trade.

A qualified disaster loss can also be claimed without itemizing. You add the net qualified disaster loss on top of your standard deduction rather than choosing between the two.⁵ For taxpayers whose other deductions would not clear the standard deduction, this is the difference between a real benefit and none.

These provisions have historically applied to major disasters declared during specific windows. The most recent version covers major disasters declared between January 1, 2020, and September 2, 2025.¹ Check current IRS guidance for your specific storm. If qualified disaster treatment does not apply, the standard $100 floor and 10% AGI threshold govern, and you must itemize.

Filing: Form 4684, Schedule A, and Your Records

Form 4684 is where the loss is reported. Section A handles personal-use property and walks through the calculation line by line: cost or adjusted basis, fair market value before and after, insurance, and the per-event reduction. Use a separate Form 4684 through line 12 for each casualty event, check the federally declared disaster box, and enter the FEMA DR- or EM- number.⁶⁷

Records to keep with the return:

Proof of ownership: deed, title, or closing statement for the home; receipts or registration for vehicles and belongings.
Adjusted basis documentation: purchase price and receipts for capital improvements.
Evidence of damage: photographs, video, contractor reports.
Valuation: professional appraisals of pre- and post-storm value, or two independent contractor estimates under the $20,000 safe harbor.
Insurance records: policy declarations, claim summaries, settlement letters, and any FEMA grant or disaster loan documentation.

For real property losses above the $20,000 safe harbor, a professional appraisal is the strongest evidence, and it must account for any general decline in area property values that happened alongside the storm rather than only the damage to your specific property.¹

Claim the Loss on Last Year’s Return for a Faster Refund

Section 165(i) of the tax code lets you elect to deduct a federally declared disaster loss on the return for the tax year immediately before the disaster occurred.³ If a hurricane hits in 2026, you can amend your 2025 return and claim the loss there, getting a refund of taxes already paid rather than waiting until you file for 2026.

The election deadline is six months after the due date, without extensions, of the disaster-year return.⁸ For a 2026 storm, that puts the deadline at October 15, 2027. Make the election by completing Form 4684, writing “Section 165(i) Election” at the top, and attaching it to a Form 1040-X amended return. Include a description of the disaster, the date, and the location of the damaged property. Whether the prior year or the current year produces a bigger benefit depends on the income in each. A lower AGI in the prior year makes the 10% threshold easier to clear.

When the Loss Is Bigger Than Your Income

A severe hurricane can produce a deductible loss larger than your total income for the year. The excess does not vanish. It creates a net operating loss you can carry forward to future years, and you do not need to be a business owner for this to happen. A personal casualty loss from a federally declared disaster can generate an NOL on its own.⁴ Under current rules, NOLs carry forward indefinitely but can offset only up to 80% of taxable income in any single carryforward year, so the benefit of a catastrophic loss can spread across several future returns.

1
Internal Revenue Service. Publication 547 (2025), Casualties, Disasters, and Thefts
2
FEMA.gov. Disasters and Other Declarations
3
Office of the Law Revision Counsel. 26 USC 165 – Losses
4
Internal Revenue Service. Topic No. 515, Casualty, Disaster, and Theft Losses
5
Internal Revenue Service. Instructions for Form 4684 (2025)
6
Internal Revenue Service. Form 4684, Casualties and Thefts
7
Internal Revenue Service. Instructions for Form 4684 (2025)Publication 547 (2025), Casualties, Disasters, and Thefts
8
eCFR. 26 CFR 1.165-11 – Election to Take Disaster Loss Deduction for Preceding Year