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                                                                                           Updated January 28, 2025

The Nonbusiness Casualty and Theft Loss Deduction


The Internal Revenue Code generally allows taxpayers to
deduct certain unreimbursed losses caused by recent
disasters and thefts from their income subject to the income
tax. Lawmakers have adjusted aspects of this deduction
over time. Congress temporarily limited the casualty and
theft loss deduction as part of the 2017 tax law (P.L. 115-
97, popularly known as the Tax Cuts and Jobs Act or
TCJA),  generally to only losses resulting from federally
declared disasters for tax years 2018-2025. For these
purposes, federally declared disasters are those declared
by the President under the Robert T. Stafford Disaster
Relief and Emergency Assistance Act (P.L. 100-707, as
amended)  and occurring in the disaster area identified in
that declaration.

The deduction offers financial relief to some taxpayers who
suffer unexpected monetary damage. In doing so, it reduces
federal revenue and subsidizes uninsured losses without
offering similar benefits to insured losses or loss-mitigation
expenses, potentially distorting taxpayers' incentives to
insure themselves for losses or spend money on disaster
loss mitigation expenses. This In Focus discusses the
structure of the deduction-both before and after the
changes that began in 2018-and  analyzes its potential
impact on the federal budget and taxpayers'
decisionmaking.

Overvew
Prior to 2018, households who itemized their deductions
could deduct their unreimbursed net personal (i.e.,
nonbusiness) losses that arise from fire, storm, shipwreck,
or other casualty, or from theft from their income. Under
permanent law, taxpayers can only deduct such losses to the
extent each loss exceeds $100, and their total exceeds 10%
of the taxpayer's adjusted gross income (AGI). The
damaged  item does not need to be repaired or replaced for
the taxpayer to claim the deduction. Taxpayers can claim
this deduction regardless of their income, and there is no
cap on the size of the deduction a taxpayer can claim. Those
whose  deductions exceed their taxable income can carry the
deduction forward to subsequent tax years.

The restriction of eligibility to unreimbursed losses means
that only losses that insurance does not compensate qualify.
Additionally, the deduction applies only to personal
losses-losses on business property are subject to different
rules. Taxpayers can claim the deduction on personal
property regardless of type.

From  2018 through 2025, the TCJA provides that the
deduction is limited to losses that result from federally
declared disasters. An exception applies when a taxpayer
incurs a nonbusiness casualty gain, meaning the taxpayer
receives compensation for a loss that exceeds the value of


the loss itself. Nonbusiness casualty gains are always
considered taxable income and are not limited to casualties
resulting from federally declared disasters through 2025.
Under the TCJA,  taxpayers can deduct losses unrelated to a
federally declared disaster, but only to the extent such
losses offset nonbusiness casualty gains.

Taxpayers can generally choose to take the loss in the year
prior to the casualty if it results from a federally declared
disaster. In years when the deduction is not limited to
federally declared disasters (i.e., before 2018 and after
2025), taxpayers must deduct losses that do not result from
a federally declared disaster in the year of the casualty. In
both circumstances, casualties are considered to have
occurred in the year in which the taxpayer discovers the
loss, even if that differs from the year in which the event
causing the casualty took place.

Qualifed Dksaster Losses
Congress has passed several pieces of legislation declaring
certain losses to be qualified disaster-related personal
casualty losses. This legislation has applied this distinction
to losses resulting from specific disasters or occurring
during a specific period of time. Taxpayers with qualified
disaster losses can claim a more generous casualty and theft
loss deduction than others. They can deduct qualified
disaster losses even if they also claim the standard
deduction. Their per-event limitation is generally $500
instead of $100, and they are not limited to deducting losses
that exceed 10% of their AGI in sum.

This designation generally applies either to specific
disasters or to federally declared disasters that occurred
during a specific period. Among others, the disasters in this
category have included federally declared major disasters (a
subset of federally declared disasters) that began between
2016 and December  21, 2019, as well as those that began
between December  28, 2019, and December  12, 2025.

Legs atnve HStory
The Revenue  Act of 1913 (P.L. 63-16), which created the
modern  federal income tax, also created the modern
deduction for casualty losses, without distinction between
business-related and nonbusiness-related losses. Theft
losses were eligible by 1916.

The Revenue  Act of 1964 (P.L. 88-272) placed a $100-per-
event floor on the deduction, corresponding to the $100
deductible provision common in property insurance
coverage at that time. The limitation to losses that, in sum,
exceed 10%  of the taxpayer's AGI was created by the Tax
Equity and Fiscal Responsibility Act of 1982 (P.L. 97-248).

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