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By Jenni Fink
Senior Editor
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If you haven't filed your tax return yet and don't have the time or just don't feel like doing it by the deadline, you can file an extension for free online.
The IRS tax filing deadline for most Americans is April 15, and failing to file a tax return by the deadline can result in a late filing fee. Millions of people each year request and receive a filing extension, which eliminates the late filing penalties, although, if a person owes taxes they're still required to pay them by the deadline or they could get a financial penalty.
How to File an IRS Tax Return Extension
Filing a federal tax extension is straightforward and automatic if it’s done by the deadline. The IRS offers several ways to do it, all centered on Form 4868, the Application for Automatic Extension of Time to File U.S. Individual Income Tax Return.
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You can request an extension in one of three main ways:
- File Form 4868 electronically: Most tax software programs and IRS‑authorized e‑file providers allow taxpayers to submit Form 4868 online. This is the fastest option and provides confirmation that the IRS accepted the request.
- Use IRS Free File or Free Fillable Forms: The IRS allows anyone, regardless of income, to file an extension for free using its Free File system or Free Fillable Forms.
- Make an electronic payment and mark it as an extension: Taxpayers who make a payment through IRS Direct Pay, debit or credit card, or a digital wallet can indicate that the payment is for an extension. In that case, a separate Form 4868 is not required.
- File Form 4868 by mail: the extension request form can be sent by mail to the relevant IRS office depending on where individuals list. Addresses are listed in the form.
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Form 4868 automatically grants a six‑month extension, moving the filing deadline to October 15, as long as it is submitted by April 15.
It’s important to note that the extension applies only to filing the return, not to paying taxes owed. Any unpaid balance after April 15 may accrue penalties and interest, even if the extension is approved.
How Much Does It Cost to File a Tax Extension
Filing a tax extension with the IRS does not cost anything. The agency offers multiple no‑cost options, including IRS Free File and electronic payments that trigger an automatic extension.
However, taxpayers who use private filing services might see small fees:
- Some commercial e‑file providers charge fees to submit Form 4868, depending on the service and filing method.
- IRS Free File partners and paper filing remain free options.
There is no penalty for requesting an extension as long as it is filed on time. Penalties apply only if:
- The extension request is filed late, or
- Taxes owed are not paid by the April 15 deadline.
The IRS consistently emphasizes that filing an extension—even if you cannot pay in full—is better than failing to file at all, because late‑filing penalties are steeper than late‑payment penalties.
When Are 2026 Taxes Due?
For most individual taxpayers, the key 2026 federal tax dates are fixed:
- Tax Day: April 15, which falls on a Wednesday and is not affected by holidays or weekend rules.
- Extension request deadline: April 15
- Extended filing deadline: October 15 for those who successfully file Form 4868.
Automatic Extensions
Some taxpayers automatically receive additional time to file their returns even if they do not request an extension. These individuals include:
- Military members on duty outside the U.S. and Puerto Rico - they receive an automatic two-month extension until June 15. However, tax payments are still due on April 15 to avoid interest.
- Taxpayers serving in combat zones - they have at least 180 days after leaving the combat zone to file returns and pay taxes due.
- U.S. citizens and resident aliens who live and work outside the U.S. and Puerto Rico - they have a two-month extension to file.
- Taxpayers in certain federally declared disaster areas.
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