If Tax Day feels like it’s sneaking up on you, you’re not alone … and you have options! When you find yourself needing more time to file, you can request an automatic tax extension from the Internal Revenue Service (IRS), which is much simpler to do than most people think. Filing an extension with TaxAct® takes only a few minutes.
Below, you’ll find everything you need to know about how to file a tax extension for free, when you need to pay your tax bill, how Form 4868 works, and how to stay on track once you’ve filed.
What is a tax extension?
A tax extension gives you an additional six months to file your federal income tax return, moving your tax deadline from April 15 to Oct. 15. If either of these dates falls on a weekend or holiday, the due date becomes the next business day.
When is the deadline to file a tax extension?
The deadline to request an extension is the same as the tax deadline: April 15. If the 15th falls on a weekend or holiday, the IRS pushes the due date to the next business day.
Note that a tax extension does not affect the date tax payments are due; it only changes the deadline for filing taxes.
How to file a tax extension
To request an extension, you’ll file IRS Form 4868, Application for Automatic Extension of Time to File U.S. Individual Income Tax Return. TaxAct can help you do this, and approval is automatic as long as you submit the form on time and correctly.
You’ll just need to provide the basics:
Name
Address
Social Security number
Estimated tax liability and payments made so far
Tax Tip: If your name or address has changed recently, make sure that the IRS and Social Security Administration have your updated information on file before filing.
Does TaxAct charge to file a tax extension?
Nope! There’s no need to hunt down a tax professional to ask for an extension request. TaxAct can help you e-file Form 4868 for free or print and mail it to the IRS if you need more time to file your federal tax return. Our easy-to-use tax preparation software will walk you through the process, and we can even help you estimate your tax payment, if necessary.
Important: A tax extension does not extend your time to pay
Speaking of tax payments, let’s clear up one important misconception: While a tax extension gives you more time to file, it does not give you more time to pay your tax bill.
If you expect to end up owing taxes instead of getting a refund, you must estimate and pay any tax you owe by April 15 to avoid interest and penalties. When in doubt, it’s better to overestimate your balance due than underestimate; if you overpay your tax bill, you’ll get the difference back as a tax refund when you eventually file your return.
How to estimate your tax payment for an extension
To finish Form 4868, you need to estimate how much tax you owe. The form helps you calculate this by estimating your total tax liability for the year and subtracting any payments you’ve already made.
This step can feel tricky if you’re still waiting on documents, but here’s the simplest approach:
Start your tax return and fill in as much as you can.
Use reasonable estimates for any missing numbers.
In TaxAct, mark uncertain entries as an estimate by checking Mark as Estimate so you can easily go back and update them later.
Pay as close to the correct amount as you can, but remember, it’s better to overpay than underpay. If you underpay, the IRS may charge interest and late-payment penalties for unpaid tax.
Note: The IRS has a “safe harbor” rule, which means you can generally avoid a failure-to-pay penaltyif your total tax payments for the year (including what you send with your extension) equal at least 90% of your eventual tax bill. That said, interest will still accrue on any amount you haven’t paid by April 15.
Tax extension deadlines for tax season 2026
Regular due date/Tax Day deadline: April 15, 2026
Extended tax filing deadline: Oct. 15, 2026
Payment deadline: Still April 15, even if you request an extension
Special automatic extensions
Certain filers may be granted extra time to file automatically, including:
These automatic extensions are separate from the standard 6-month extension and can provide extra breathing room for taxpayers in unique situations. If you qualify for an automatic 2-month extension and still need more time, you can file Form 4868 before the June deadline to extend further — typically to Oct. 15.
When does it make sense to file a tax extension?
The IRS doesn’t ask for a reason, but most people file an extension because:
They’re missing necessary tax forms or financial statements.
They had an emergency or unexpected life event.
They want more time to figure out retirement contributions or elections.
They simply need more time to complete their return accurately.
If you need more time, don’t be afraid to ask for it — that’s what extensions are for.
When not to file a tax extension
An extension won’t help if you can’t pay your tax bill by April 15. In that case, the better move is to file your return (even if it’s not perfect) or set up an IRS payment plan.
Additionally, if you’re owed a refund, you technically have up to three years to file and claim it. While there’s no penalty for filing late when you don’t owe tax, it still helps to file sooner so you don’t forget details that could affect your refund amount.
What to do after filing your tax extension
That six-month window goes by quickly. To keep yourself on track:
Keep a tax checklist of missing forms or other tax information items.
Save and organize new documents as you get them.
Keep working on your return in small chunks.
File as soon as you’re able this tax season — don’t wait for October unless you have to.
State tax extensions
If you live in a state that charges income tax, you’ll need to file an extension for your state taxes and your federal taxes.
How to file a state tax extension
The process varies greatly by state. Some states will grant you an automatic 6-month extension if you’ve filed for a federal tax extension (provided you don’t owe additional state income tax). Other states automatically grant extensions to most taxpayers, without needing to file a federal extension or a state-specific form. But just like federal rules, state extensions typically extend your time to file, but not your time to pay.
When you file with TaxAct, we make filing extensions easy. Our tax software will guide you through completing Form 4868 for your federal return and provide you with any necessary state extension forms, if applicable.
FAQs
The bottom line
A tax return extension can give you the breathing room you need to file an accurate return without the last-minute scramble. As long as you submit Form 4868 by April 15 and pay your estimated tax due, the IRS will grant you an extra six months to finish up.
Need to request an extension? TaxAct makes the extension process quick and easy, whether you need federal, state, or business extension support.
This article is for informational purposes only and not legal or financial advice.
All TaxAct offers, products and services are subject to applicable terms and conditions.
