Form 4868 (2025): Tax Extension Filing Guide and Rules Checklist

Form 4868 (2025) — Application for Automatic Extension of Time to File U.S. Individual Income Tax Return

What This Form Does

Form 4868 grants U.S. citizens, residents, and certain nonresidents an automatic 6-month extension to file their 2025 income tax return without incurring a late filing penalty. Filing Form 4868 by April 15, 2025, requires no explanation or IRS approval, though it does NOT extend the deadline to pay taxes owed or stop interest from accruing on unpaid balances.

You can submit the form electronically, by mail, or by making an electronic payment and designating it as an extension payment. The IRS processes approved extensions automatically, moving the filing deadline from April 15, 2025, to October 15, 2025, for most calendar-year filers.

Year-Specific Filing Steps for 2025

Completing Form 4868 accurately requires careful attention to current tax year information and proper line-by-line entries. Follow these steps in order to ensure your extension request meets IRS requirements and protects you from late filing penalties.

1. Verify Return Type Eligibility: Confirm that Form 4868 applies to your 2025 return, which includes Form 1040, Form 1040-SR (age 65+), Form 1040-NR (nonresident), or Form 1040-SS (U.S. citizen or resident alien with self-employment income only).
2. Complete Part I with Current Name and Address: Enter your full name(s) as they appear on your 2025 tax return, and enter your current mailing address. If married filing jointly, list both spouses' names in return order. Separately, update Form 8822 if your address has changed since your 2024 return—printing a new address on Form 4868 does not update IRS records.
3. Enter SSN or ITIN on Lines 2–3: On line 2, enter your SSN (or EIN if filing as a foreign estate or trust on Form 1040-NR). On line 3, enter your spouse's SSN if you are filing jointly. If you are a nonresident alien without an SSN and not yet eligible for an ITIN, write "ITIN TO BE REQUESTED" and apply for an ITIN using Form W-7 before filing your 2025 return.
4. Estimate Total 2025 Tax Liability on Line 4: Enter the total tax you expect to owe on your 2025 Form 1040, 1040-SR, or 1040-NR (line 24) or Form 1040-SS (Part I, line 7). Use all available wage statements, income estimates, and withholding information to make the most accurate estimate possible. An unreasonably low estimate may void your extension.
5. Calculate 2025 Payments on Line 5: Sum all payments you expect to report on your 2025 return—federal income tax withheld from wages, estimated tax payments (Form 1040, 1040-SR, or 1040-NR line 33, excluding Schedule 3 line 10; or Form 1040-SS Part I, line 12, excluding Part I line 11b). Do NOT include any payment you intend to make with Form 4868 itself.
6. Subtract Payments from Tax Liability on Line 6: Subtract line 5 from line 4 to calculate the balance due. If line 5 exceeds line 4, enter -0-. This is your potential tax liability remaining after withholding and estimated payments, which you may pay in full or in part when submitting Form 4868.
7. Check Line 8 if Out of Country on April 15, 2025: If on April 15, 2025 (the regular due date), you are living outside the U.S. and Puerto Rico with your main work outside the U.S. and Puerto Rico, OR in military or naval service on duty outside the U.S. and Puerto Rico, check line 8 to claim an additional 4-month extension beyond the automatic 2-month extension (to October 15, 2025). Presence in the U.S. on the due date does not disqualify you if you meet the residence or work test.
8. Check Line 9 if Form 1040-NR Filer Without U.S. Wage Withholding: If you file Form 1040-NR and did not receive wages subject to U.S. income tax withholding during 2025, check line 9 to confirm your extended due date is June 16, 2025 (rather than April 15).
9. Select Payment Method and Remit by April 15, 2025:
   • Pay electronically via Direct Pay, EFTPS, digital wallet (Click to Pay, PayPal, Venmo), or by phone with no Form 4868 mailing required.
   • Pay by check or money order made payable to "United States Treasury" and mail it with Form 4868 to the address matching your state or residency category.
   • File Form 4868 without making a payment.
   • Write your SSN, daytime phone, and "2025 Form 4868" on any check or money order.
   • Do not staple your payment to the form.
10. Report Payment on Your 2025 Return Using Schedule 3, Line 10: When you file your 2025 return, claim credit for any payment submitted with Form 4868 on Form 1040, 1040-SR, or 1040-NR Schedule 3, line 10, or Form 1040-SS Part I, line 11b. Taxpayers who filed separate Forms 4868 but later file a joint return should combine both payments on the joint return. Those who filed jointly but later file separately may allocate the payment as agreed between spouses.
11. Retain Electronic Confirmation or Paper Copy: Electronic filers should save their confirmation number and receipt for record-keeping purposes. Paper filers should keep a copy of Form 4868, but must not attach it to their 2025 tax return when filing.
12. Understand Interest and Late Payment Penalty Consequences: Interest accrues on any unpaid tax from April 15, 2025 (the regular due date), even if you obtain the extension. Late payment penalty is generally ½ of 1% per month (max 25%) on unpaid tax from April 15, 2025. You may avoid this penalty if at least 90% of your total 2025 tax is paid by April 15 via withholding, estimated payments, or Form 4868 payments, AND the remaining balance is paid with your return.

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This checklist is for educational purposes only and does not constitute tax or legal advice. Always review official IRS instructions and consult a qualified professional for guidance.