How Do You File a Tax Extension with the IRS?

You file a tax extension by submitting IRS Form 4868 before your filing deadline. This is the standard IRS tax extension form for individuals, which automatically gives you an additional 6 months to file your federal tax return, pushing your tax extension deadline from April 15 to October 15. No approval is needed. You can request a tax extension yourself online in a few minutes, or your tax professional can file the tax extension form for you as part of your tax preparation.

Before you file, here is what you need to know:

Form 4868 is the only form required for individual tax extensions
An extension gives you more time to file, not more time to pay. Taxes owed are still due April 15.
There is no penalty for filing an extension. Millions of taxpayers do it every year.
You can file electronically through IRS Free File, IRS Direct Pay, or through your tax preparer

Need More Time? We Will File Your Extension and Have Your Return Ready When You Are.

Your Greenback accountant files Form 4868, estimates your liability, and starts building your return in the background.

Below are the exact steps, key deadlines, and what to watch out for to stay penalty-free.

What Are the Steps to File a Tax Extension Online?

Whether you file a tax extension online yourself or work with a tax professional, here is the process:

Step 1: Estimate your tax liability. Review your income for the year and estimate how much you owe. Subtract any withholding, estimated tax payments, or credits you have already applied. You will need this number for the form. If you have foreign income, self-employment income, or multiple income sources, this estimate can be tricky. A tax professional can calculate it accurately so you avoid underpayment surprises later.

Step 2: Choose your filing method. You have several options:

Method	How It Works	Best For
IRS Free File	File Form 4868 electronically at no cost through IRS Free File	Simple returns with AGI of $89,000 or less (guided software) or any income level (fillable forms)
IRS Direct Pay or EFTPS	Make a payment and designate it as an extension. No separate form needed.	Taxpayers who owe and want to pay and extend in one step
Through your tax preparer	Your accountant files Form 4868 for you and begins preparing your return so it is ready when you are	Anyone with foreign income, self-employment income, or a complex tax situation

Step 3: Submit before April 15. Your extension must be filed by the original tax deadline. For the 2025 tax year, that is April 15, 2026. If you are a U.S. citizen or resident living abroad, you already have an automatic extension to June 15, 2026, and can file Form 4868 before that date to obtain a further extension to October 15.

Step 4: Pay what you owe (if anything). If you expect to owe taxes, send a payment with your extension or through IRS Direct Pay. This is the single most important step, because interest and the failure-to-pay penalty begin accruing on April 15, regardless of your extension.

Does a Tax Extension Give You More Time to Pay?

No. This is the most common misconception about tax extensions. Form 4868 extends your time to file your return, but your tax payment is still due on the original deadline.

If you cannot pay the full amount by April 15, file for an extension and pay as much as you can. Here is why: the failure-to-file penalty (5% of unpaid taxes per month, up to 25%) is ten times larger than the failure-to-pay penalty (0.5% per month, up to 25%). Filing the extension eliminates the larger penalty entirely.

Example: You owe $5,000 and cannot pay by April 15. If you file Form 4868 and pay nothing, you owe roughly $25 per month in late payment penalties plus interest. If you skip the extension and do not file at all, you owe $250 per month in failure-to-file penalties plus the late payment penalty on top of that. Filing the extension saves you $225 per month.

What Happens If You Miss the Extension Deadline?

If you miss the April 15 (or June 15 for expats abroad) deadline, you cannot file Form 4868 retroactively. Your return is considered late, and the failure-to-file penalty kicks in immediately if you owe taxes.

The minimum late filing penalty is the lesser of $525 or 100% of the tax owed for returns required to be filed in 2026.

If you do not owe anything, there is no penalty for filing late. But you still need to file within three years to claim any refund you are owed.

Even if you have missed a deadline, it is not too late to get help. Our late tax filing guide walks through your options, and our accountants regularly help taxpayers catch up on back taxes with minimal penalties. If you have been non-compliant for multiple years, the IRS Streamlined Filing Procedures may allow you to get current with no penalties at all.

How Is the Tax Extension Different for U.S. Citizens Living Abroad?

If your tax home is in a foreign country and you live outside the United States on April 15, you automatically get a two-month extension to June 15 with no paperwork required. When you file, attach a statement explaining that you qualify.

From there, filing Form 4868 before June 15 extends your deadline to October 15. In rare cases, a written request mailed to the IRS by October 15 can extend the final deadline to December 15.

Expat extensions are where things get more nuanced. You may need to coordinate your extension with the Foreign Earned Income Exclusion qualification period, decide between Form 4868 and Form 2350 (which is designed for expats who have not yet met the Physical Presence Test), and account for separate FBAR and state filing deadlines. Our Form 4868 guide for expats covers every scenario in detail.

Deadline	Who It Applies To	Action Required
April 15, 2026	All U.S. taxpayers	File return or Form 4868; pay taxes owed
June 15, 2026	U.S. citizens/residents living abroad	Automatic extension (no form needed); file Form 4868 for October
October 15, 2026	Anyone who filed Form 4868	File your completed return
December 15, 2026	Special circumstances only	Written request to the IRS required by October 15

What If You Want a Tax Professional to Handle Your Extension?

Filing Form 4868 is the easy part. The harder part is estimating what you owe accurately, especially if you have income from multiple countries, run a business abroad, or need to coordinate the FEIE, Foreign Tax Credit, and FBAR deadlines together.

When you work with an expat tax accountant, they file your extension for you and start preparing your return right away. That means when your documents are ready, your return is too. You are not scrambling at the October 15 deadline. You are reviewing a completed draft.

This is especially valuable if you are living abroad and dealing with foreign income documents that arrive on a different schedule than U.S. forms. Your accountant can estimate your liability, file the extension, and build your return in the background so you stay compliant without doing any of the legwork yourself. See our full list of expat tax deadlines to make sure you do not miss anything.

Your Extension Is Just the First Step

We file your extension, estimate what you owe, and start building your return so it is ready when you are. No deadlines missed, no guesswork.

Frequently Asked Questions

How do you request a tax extension from the IRS?

You request a tax extension by filing Form 4868 before your filing deadline. You can submit it electronically through IRS Free File, through tax preparation software, or by making a payment through IRS Direct Pay and selecting “extension” as the payment type. If you work with a tax professional, they can file the request for you. The IRS does not require you to provide a reason for the extension, and there is no approval process. Once received, the extension is granted automatically.

Can you file another tax extension after October 15?

For most taxpayers, no. October 15 is the final extended deadline. However, U.S. citizens and residents living abroad who already filed Form 4868 can request one additional two-month extension to December 15 by mailing a written request to the IRS before October 15. This final extension is granted on a case-by-case basis, and the IRS will only contact you if the request is denied. Beyond December 15, no further extensions are available. See the full expat tax deadline calendar for every date you need to know.

How much does it cost to file a tax extension?

Filing Form 4868 with the IRS is free. IRS Free File and IRS Direct Pay both let you file a tax extension online at no cost. If you use commercial tax software, the extension is typically included. If you work with a tax preparer, the extension filing is generally included as part of their overall tax preparation service, not charged separately.

How long does it take to file a tax extension?

Filing a tax extension takes less than five minutes if you file electronically. Through IRS Free File or IRS Direct Pay, you fill in a few fields (your name, Social Security number, estimated tax liability, and any payment), hit submit, and you are done. There is no waiting period. The extension is effective immediately upon submission. If you mail a paper Form 4868, allow extra time for delivery, especially if you are mailing from outside the United States.

Is there a penalty for filing a tax extension?

No. There is no penalty for filing a tax extension, and it does not affect your audit risk. The IRS has stated that filing an extension is a routine part of the tax system, and millions of taxpayers use one every year. The only penalties that apply are for paying late (0.5% of unpaid taxes per month) or failing to file entirely (5% per month). Filing the extension eliminates the failure-to-file penalty completely, which is the more expensive of the two.

Do I need to file a state tax extension separately?

It depends on the state. Some states automatically grant a state tax extension when you file a federal extension (Form 4868), including California and most states without an income tax. Others, like New York, require you to file a separate state extension form. If you still have state tax obligations, check your state’s requirements individually. Do not assume a federal tax filing extension covers your state return.

This article is for informational purposes only and does not constitute tax, legal, or financial advice. Tax laws are complex and subject to change. Consult with a qualified tax professional regarding your specific situation.