What Form 4868 Does
Form 4868’s full name is the Application for Automatic Extension of Time To File U.S. Individual Income Tax Return. An extension is extra time to send in your return. The Form 4868 instructions cover filers of Form 1040, 1040-SR, 1040-NR or 1040-SS.
The extension is automatic, which means the IRS doesn’t ask why you need more time. To qualify, you must file it by the regular due date with a proper estimate of your tax liability (the total tax you owe for the year) on line 4. On lines 4–6, you subtract what you’ve already paid from that estimate to find your balance due.
Here’s how the IRS extension deadlines line up:
| What’s due | Deadline for most calendar-year filers |
|---|---|
| Return, if you don’t request an extension | April tax deadline (usually April 15) |
| Payment of any tax you owe | April tax deadline (usually April 15) |
| Form 4868 or an extension payment | April tax deadline (usually April 15) |
| Return, if you request an extension | October 15 |
How to Request the Extension With Form 4868
You can file a tax extension electronically or by mail.
Request It Electronically
One option is to pay all or part of your estimated tax electronically and mark it as an extension payment. When you do, you don’t need to send a separate Form 4868, and you’ll get a confirmation number for your records. The IRS explains its electronic payment options.
You can also file an extension online through tax software or a tax professional. Several companies offer free e-filing of Form 4868 through the IRS Free File program.
Request It by Mail
To file on paper, mail the paper Form 4868. Don’t attach a copy of it to your tax return later. You can file your return any time before the extension expires.
What Form 4868 Doesn’t Cover
Form 4868 gives you more time to file, but your payment is still due by the April deadline. Interest builds on any tax you haven’t paid by then, and a late payment penalty may apply.
| Penalty | Monthly charge | Maximum |
|---|---|---|
| Failure-to-file penalty | Usually 5% of the amount due for each month or part of a month | 25% |
| Failure-to-pay penalty | 0.5% for each month or part of a month | 25% |
If your return is more than 60 days late, the minimum late filing penalty is $525 for returns due after 2025, or your balance due, whichever is smaller. The IRS adjusts this amount for inflation.
You can limit the late payment penalty. During the extension, the IRS assumes you have reasonable cause (an acceptable reason for paying late) if you pay at least 90% of your total tax by the April deadline. You then pay the rest with your return. Withholding (tax taken out of your paycheck) counts toward that 90%, along with any payments you’ve made on your own.
Special Situations
Living Outside the U.S.
If you’re a U.S. citizen or resident and you’re out of the country on the April deadline, you get until June 15 to file and pay. You don’t need to request this. For more time, file Form 4868 and check line 8 to get an additional 4 months. Interest on unpaid tax still runs from the April deadline.
State Returns
Form 4868 is an extension for your federal U.S. individual income tax return only. If your state has an income tax, look up your state tax agency to find out how to get more time there.
Sources
- IRS, About Form 4868
- IRS, Form 4868 (PDF)
- IRS, Get an Extension to File Your Tax Return
- IRS, Failure to File Penalty
- IRS, Failure to Pay Penalty
- IRS, State Government Websites
