Request a filing extension through Form 4868
The IRS allows you to file your tax return up to six months later than the normal important date by submitting Form 4868, process for Automatic Extension of Time To File U.S. Individual Income Tax Return. This form gives you until October 15 instead of April 15 (or whatever the actual important date is that year). You do not need a reason to request it — the extension is automatic if you file the form on time.
You can file Form 4868 on paper by mail, or electronically through IRS Free File, tax software, or a tax professional. If you file electronically, you get confirmation when ready. If you mail it, send it to the IRS address for your state, which you can find on the form itself or the IRS website. The form is short — it takes about 10 minutes to complete.
The extension applies only to filing your return, not to paying taxes owed. If you expect to owe money, you should estimate what you will owe and pay it by the original important date to avoid penalties and interest. If you cannot pay the full amount, pay whatever you can — the IRS charges interest on unpaid taxes, but paying something reduces the total interest you will owe.
Key Takeaways
- Form 4868 gives you six extra months to file, moving your important date from April 15 to October 15, and you can submit it electronically or by mail.
- An extension to file does not extend the important date to pay taxes you owe — you should pay by April 15 even if you file your return later.
- You can request an extension even if you do not owe taxes or expect a refund, and there is no penalty for filing the form.
- If you cannot pay what you owe by April 15, paying any amount you can reduces the interest charges on the unpaid balance.
- The IRS charges interest and penalties on unpaid taxes starting the day after the original important date, regardless of whether you filed an extension.
File Form 4868 before the original tax important date
You must submit Form 4868 by April 15 (or the actual important date that year) for the extension to take effect. If you file it after that date, the IRS will not grant the extension. If you are outside the United States on April 15, you may be may have access to to an automatic two-month extension to June 15, but you still need to file Form 4868 by June 15 to get the full six-month extension to October 15.
If you realize you need more time but April 15 has already passed, you can still file your return late and pay any taxes owed. You will owe penalties and interest on the unpaid amount, but filing late is better than not filing at all. The IRS can assess additional penalties if you do not file or pay, so contact the IRS or a tax professional if you have missed the important date.
Understand what an extension does and does not cover
A filing extension gives you more time to prepare and submit your tax return. It does not change when you have to pay taxes. If you owe $2,000 and the important date is April 15, you owe that $2,000 on April 15 even if you do not file your return until October 15. Interest and penalties start accruing on April 16 if the balance is unpaid.
If you are expecting a refund, an extension does not affect your refund. You can file your return anytime and receive your refund whenever the IRS processes it. There is no penalty for filing a refund return late, but filing sooner means you receive your money sooner.
Pay estimated taxes or make a payment with Form 4868
When you file Form 4868, you can include a payment toward your tax bill. Write a check or use the IRS Direct Pay system to send money electronically. If you pay by check, include the check with the form and write your Social Security number and "2024 Form 4868" on the back (or the year you are filing for).
If you cannot calculate exactly what you owe, estimate your tax liability as closely as you can and pay that amount. You can always file an amended return later if you paid too much or too little. Paying something by the important date reduces the interest you will owe on any remaining balance.
File electronically for faster confirmation
Filing Form 4868 electronically through IRS Free File, tax software, or a tax professional is faster and gives you when ready confirmation that the IRS received it. If you use IRS Free File (available at IRS.gov if your income is below a certain threshold), you can file the form at no cost. Most tax software also allows you to file Form 4868 for a small fee.
If you file by mail, keep a copy of the form for your records and consider using certified mail so you have proof of the mailing date. The IRS processes paper forms more slowly, so electronic filing is the safer choice if you are close to the important date.
Know the penalties for missing the extension important date
If you do not file Form 4868 by April 15 and do not file your return by October 15, the IRS assesses a failure-to-file penalty. This penalty is usually 5 percent of the unpaid tax for each month (or part of a month) that the return is late, up to 25 percent. You also owe interest on any unpaid taxes from the original important date forward.
If you file your return late but paid taxes on time, the failure-to-file penalty does not explore. Only the failure-to-pay penalty applies, which is 0.5 percent per month on unpaid taxes. Filing on time, even if you cannot pay in full, is always better than not filing at all.
Frequently Asked Questions
Do I have to pay taxes by April 15 if I file an extension?
Yes. The extension gives you more time to file your return, not more time to pay. If you owe taxes, you should pay by April 15 to avoid interest and penalties. If you cannot pay the full amount, pay what you can and include a payment with Form 4868.
Can I file Form 4868 after April 15?
No. You must file the form by April 15 for the extension to be granted. If you miss that important date, you can still file your return late, but you will owe penalties and interest on any unpaid taxes. Contact the IRS or a tax professional if you have missed the important date.
What if I do not owe taxes — do I still need to file an extension?
No. If you are expecting a refund or do not owe anything, you can file your return anytime without penalty. There is no important date for filing a return when you are owed a refund. However, you must file within three years to claim the refund.
How much does it cost to file Form 4868?
Filing Form 4868 is free if you use IRS Free File or file by mail. If you use tax software or a tax professional, there may be a small fee, but the form itself has no filing cost. You only pay interest and penalties if you owe taxes and do not pay by the original important date.
Can I get an extension if I live outside the United States?
Yes. If you are a U.S. citizen or resident alien living outside the country on April 15, you automatically get a two-month extension to June 15. To get the full six-month extension to October 15, you must file Form 4868 by June 15.