When is Form 4684 required?

You must file Form 4684 to claim a casualty or theft loss on your federal tax return. Personal‑use losses are only deductible for federally declared disasters.

Can I use Form 4684 for business property?

Yes. Section B of the form is dedicated to business and income‑producing property losses.

Do I need to attach supporting documents?

Yes. Attach receipts, police reports, insurance statements, and any other documentation that verifies the loss.

What if my loss exceeds my insurance reimbursement?

Enter the difference on Line 4 (Gain from casualty or theft) or continue to the loss calculation sections to determine the deductible amount.

Is the online fillable version the same as the PDF from the IRS?

The fillable version uses the exact IRS layout and fields, so the information you enter matches the official PDF perfectly.

How long do I have to file Form 4684?

Form 4684 is filed with your annual tax return, typically due by April 15. Extensions apply if you file for an extension on your return.

Can I edit a completed Form 4684 later?

Yes. With Formize you can reopen the saved PDF, make corrections, and re‑download the updated version before filing.

Fillable IRS Form 4684 – Casualties and Thefts

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Fillable IRS Form 4684 – Casualties and Thefts

What Is Form 4684?

IRS Form 4684, Casualties and Thefts, is used to report losses from property damage, natural disasters, or theft. The form allows individuals and businesses to claim a deductible loss on their federal tax return.

How to Complete Form 4684 Online

With Formize’s built‑in PDF filler you can fill out Form 4684 directly in your browser—no download, print, or manual entry required.

Click the "Fill out this form" button on this page.
Wait a few seconds while the Formize PDF Filler app loads the fillable version of Form 4684.
Enter your personal information, loss details, and insurance reimbursements exactly as the instructions describe.
Review the calculated deductible loss that appears automatically.
Save the completed PDF or download it to attach to your tax return.

Common Mistakes to Avoid

Skipping the disaster declaration check: For personal‑use property, a loss is only deductible if it results from a federally declared disaster.
Incorrect basis calculation: Use the original cost or adjusted basis, not the current market value.
Omitting insurance reimbursements: All insurance or other reimbursements must be reported on Line 3.
Failing to attach supporting documents: Receipts, police reports, and insurance statements should accompany the form.

Download the Fillable PDF

If you prefer the traditional method, you can download the official fillable PDF from the IRS. The file is fully compatible with Formize’s online editor.

Download IRS Form 4684 (PDF)

FAQs About Form 4684

Below are the most common questions taxpayers have about Form 4684.

Instructions

Form 4684 Instructions - Instructions for Form 4684, Casualties and Thefts

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FAQ

When is Form 4684 required?
You must file Form 4684 to claim a casualty or theft loss on your federal tax return. Personal‑use losses are only deductible for federally declared disasters.
Can I use Form 4684 for business property?
Yes. Section B of the form is dedicated to business and income‑producing property losses.
Do I need to attach supporting documents?
Yes. Attach receipts, police reports, insurance statements, and any other documentation that verifies the loss.
What if my loss exceeds my insurance reimbursement?
Enter the difference on Line 4 (Gain from casualty or theft) or continue to the loss calculation sections to determine the deductible amount.
Is the online fillable version the same as the PDF from the IRS?
The fillable version uses the exact IRS layout and fields, so the information you enter matches the official PDF perfectly.
How long do I have to file Form 4684?
Form 4684 is filed with your annual tax return, typically due by April 15. Extensions apply if you file for an extension on your return.
Can I edit a completed Form 4684 later?
Yes. With Formize you can reopen the saved PDF, make corrections, and re‑download the updated version before filing.

HOW TO

How to fill out IRS Form 4684 for free, online in 5 easy steps:

1
Open the Fillable Form
Click the "Fill out this form" button on the page. The Formize PDF Filler will load the fillable version of Form 4684 in your browser.
2
Enter Your Information
Fill in your name, SSN, and loss details exactly as the IRS instructions require. The online fields guide you line‑by‑line.
3
Add Insurance & Reimbursements
Record any insurance payouts or other reimbursements on Line 3. The calculator will automatically adjust the deductible loss.
4
Review & Save
Check the automatically calculated loss for accuracy, then click "Save" to download the completed PDF or store it in your Formize account.
5
Attach to Your Tax Return
Include the saved PDF with your Form 1040 when you file, either electronically or by mail.

ABOUT

Federal tax forms

IRS Form 4684 is one of Federal tax forms that are documents used to report and file federal income taxes with the Internal Revenue Service (IRS) in the United States. These forms are used by individuals, businesses, and organizations to report their income, deductions, and other relevant information necessary for calculating their federal tax liability.

The most commonly used federal tax form is the Form 1040, which is used by individual taxpayers to report their personal income tax. Other commonly used forms include the Form 1065 for partnerships, Form 1120 for corporations, and Form 990 for tax-exempt organizations.

Federal tax forms typically require taxpayers to report various sources of income, such as wages, salaries, and tips, as well as income from investments, rental properties, and other sources. The forms also allow taxpayers to claim deductions and credits for various expenses, such as charitable contributions, mortgage interest, and healthcare expenses.

It is important to file federal tax forms accurately and on time, as failure to do so can result in penalties and interest charges from the IRS.

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