How to File a Tax Extension: IRS Form 4868 and Other Options

To file an extension on your taxes, submit IRS Form 4868 by the April filing deadline, use IRS Free File, or make an electronic payment and designate it as an extension payment. This gives you until October 15 to file your return, but you must still pay any taxes you owe by the original due date to avoid penalties and interest.

An extension to file is not an extension to pay. The IRS expects you to estimate your tax liability and pay the balance due by the April deadline. If you pay at least 90% of your eventual tax bill, you may avoid the late payment penalty, though interest still accrues on any unpaid amount. Filing an extension eliminates the late filing penalty, which is typically 5% of the unpaid tax per month, up to 25%.

Who Should File a Tax Extension

You should file an extension if you cannot complete your return by the deadline and you owe taxes. If you are due a refund, there is no penalty for filing late, and you have up to three years from the original due date to claim it. However, if you expect to owe, filing an extension protects you from the late filing penalty. Common reasons include missing tax documents, unexpected life events, or needing more time for tax planning.

How to File an Extension: Step-by-Step Options

There are three main ways to request an automatic six-month extension:

1. Use IRS Free File: Anyone can file an extension through an IRS Free File partner, regardless of income. This is a free electronic option available on the IRS website.
2. File Form 4868 by mail or electronically: You can download Form 4868 from the IRS website, complete it, and mail it to the address listed in the instructions. You can also e-file it through tax software or a tax professional.
3. Make an electronic payment and designate it as an extension: When paying online via IRS Direct Pay, EFTPS, or credit/debit card, select that the payment is for an extension. You do not need to file a separate form, and you will receive a confirmation number.

When filing Form 4868, you must estimate your total tax liability for the year and subtract any taxes already paid through withholding or estimated payments. Pay the remaining balance with the extension request to minimize penalties and interest.

Key Deadlines and Special Situations

The regular due date for individual returns is April 15, but it may shift if it falls on a weekend or holiday. The extension deadline is October 15. Certain taxpayers may have different deadlines:

• U.S. citizens or resident aliens living abroad: You may receive an automatic two-month extension to file, and you can request an additional extension using Form 4868.
• Members of the military in combat zones: You may have additional time to file and pay without penalties.
• Victims of disasters: The IRS may grant extended deadlines for those affected by federally declared disasters.

Businesses and other entities use different forms, such as Form 7004 for business income tax returns and Form 8868 for exempt organizations.

State Tax Extensions

Many states automatically grant a state extension if you have a federal extension, but some require a separate form or payment. Check with your state tax agency for specific requirements. For example, some states may require you to file a state extension form even if you have a federal one.

What Happens After You File an Extension

Once you file an extension, you have until October 15 to submit your complete return. If you paid an estimated amount with your extension, you will reconcile it when you file. If you overpaid, you can receive a refund; if you underpaid, you will owe the difference plus interest and possibly penalties. If you cannot pay your full tax bill by the deadline, consider applying for an IRS payment plan, such as an installment agreement, to reduce penalties.

For more information, visit the IRS extension page or USA.gov's guide to federal tax extensions.