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Form 4684


Form 4684 is a document filed by taxpayers in the United States with the Internal Revenue Service (IRS) to report gains or losses from casualties or thefts. It is used to detail and calculate the amount of loss incurred and whether the loss is business, personal-use property, or income-producing property. The total loss calculated is then reported on other forms to potentially reduce taxable income.


The phonetics of the keyword “Form 4684” is: /fɔrm fɔrˈsɪks ˈeɪtiː ˈfoʊr/

Key Takeaways

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  1. Purpose: Form 4684, Casualties and Thefts, is used by individuals, partnerships, and corporations to report income losses from casualties and theft. These losses could range from natural disasters to burglaries.
  2. Claiming the Loss: It is important to note that only losses that are not reimbursed or covered by insurance can be reported on Form 4684. If the reimbursement is less than the adjusted basis of the property, then there is a deductible loss.
  3. Filing Details: The form requires detailed information about the casualty or theft, the insurance or other reimbursement received, and the resulting computation of the loss. Additionally, it’s often necessary to attach other forms or schedules, depending on the nature of the loss and the tax entity type.



Form 4684, known as Casualties and Thefts form, is crucial in the business/finance domain as it’s utilized in the United States for reporting gains or losses from casualties, disasters, or thefts to the Internal Revenue Service (IRS). This form becomes important particularly when a taxpayer has suffered property losses due to unexpected events like theft or natural disasters such as a flood, hurricane, or earthquake. Filing Form 4684 allows taxpayers to provide detailed information about their losses and potentially claim a deduction or reduce taxable income. This could bring considerable tax relief for businesses and individuals going through financial difficulties due to such losses. Additionally, insurance reimbursements and any salvage value are also reported on this form to accurately calculate the net loss or gain.


Form 4684, a U.S. federal tax form, is utilized to provide a detailed account of any casualties or thefts and the corresponding financial losses that have occurred within a tax year. The purpose of this form is to offer a structured route for taxpayers to claim deductions on their personal property. These deductions can include losses from natural events such as floods, earthquakes, wildfires, and similar disasters that are unexpected, sudden, or unusual, or losses from thefts. The losses recorded on Form 4684 can only be claimed as deductions if they aren’t compensated for through insurance or other means.The use of Form 4684 can help businesses and individuals lessen their taxable income, enabling them to indirectly recover a portion of their losses. To further allow for the determination of valid deductions, one must take into account the fair market value before and after the casualty or theft. This form not only assists in providing an accurate snapshot of the taxpayer’s financial loss to the IRS, but it also aids the taxpayer in utilizing these unfortunate occurrences to their potential tax advantage.


Form 4684 refers to the document filled out for the US Internal Revenue Service (IRS) concerning “Casualties and Thefts.” It allows you to report any financial loss caused by an unfortunate event or unexpected disaster. Below are three scenarios, or real-world examples, which may necessitate using Form 4684:1. Natural Disasters: A business owner who runs a seaside restaurant may have been hit by a devastating hurricane that swept the coast. In the aftermath, the business establishment had faced significant damages, resulting in a substantial financial loss to the business owner. In this scenario, the business owner can file Form 4684 to report the losses from this casualty to the IRS and hopefully get some tax benefits in return.2. Property Thefts: If a homeowner has had home burglaries where valuable personal property (like jewelry, electronics, or artworks) has been stolen, and the homeowner was not fully compensated for the losses by an insurance company, then the homeowner can file IRS Form 4684 to report these uncompensated losses, which may reduce his or her annual tax liability.3. Investment Scams: An individual could have invested a substantial amount of money in a fraudulent scheme, like a Ponzi scheme, and lost all their invested money when the scheme crumbled. Here, the investor can use Form 4684 to declare this financial loss as theft and have it reflected in their tax forms.

Frequently Asked Questions(FAQ)

What is Form 4684?

Form 4684, also known as Casualties and Thefts , is a document issued by the U.S. Internal Revenue Service (IRS). It is used to report gains and losses from casualties and thefts.

Who should file Form 4684?

Any individual, business, or corporation that has suffered a loss due to a casualty or theft during the tax year should file Form 4684.

What qualifies as a casualty or theft loss?

According to the IRS, casualty losses can result from any unexpected or sudden events like flooding, hurricanes, tornadoes, fires, earthquakes, or accidents. Theft losses are considered to be any stealing or taking of money or property with the intent to deprive the owner of its use or benefit.

How can I calculate my loss on Form 4684?

To calculate your loss, you must first determine the decreased fair market value (FMV) of your property after the casualty or theft. Then, subtract any insurance or other reimbursements you received. You should also consider your adjusted basis, which is usually the amount you paid for the property.

Where is Form 4684 filed?

Form 4684 is filed along with your regular annual tax return, and it should be sent to the same IRS service center where you file your annual tax return.

What information is needed to complete Form 4684?

To complete this form, you will need detailed information about the casualty or theft, the insurance or other reimbursement you received, the cost or adjusted basis of the property, and the decrease in fair market value as a result of the casualty or theft.

Is there a deadline for filing Form 4684?

Form 4684 should be filed with your regular annual tax return for the year in which the loss occurred. It is important to follow regular tax filing deadlines unless the IRS has specifically granted an exception or extension in cases of federally declared disasters.

Can I file Form 4684 electronically?

Yes, Form 4684 can be filed electronically with the IRS in conjunction with your federal tax return. It can also be filed on paper, if you prefer.

Related Finance Terms

  • Casualty Loss
  • Theft Loss
  • Federal Income Tax Deductions
  • Non-Business Losses
  • Disaster Area Losses

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