How to File a Tax Extension (And Stop the Penalty Clock)

Running out of time? Don’t panic. You can get an automatic 6-month extension to file your taxes. But be warned: An extension to file is NOT an extension to pay. Here is how to avoid the IRS wrath.

BMT Tax Research Team BMT Tax Research Team · 📅 Jan 2026 · ⏱️ 4 min read · TAX-TIPS › GUIDES
New Deadline
Oct 15
6 Extra MonthsTime
Filing Penalty
5% / mo
If You Ignore ItAvoid
Payment Penalty
0.5% / mo
If You FileManageable

Why You MUST File (Even If You Can’t Pay)

Many people hide from the IRS because they can’t afford the tax bill. This is a fatal mistake.

Penalty Type Monthly Rate Max Cap
Failure to File 5.0% 25%
Failure to Pay 0.5% 25%
Interest ~7% (Annual) None
The Lesson
Filing protects you. By filing an extension (or the return itself), you drop your penalty from the massive 5% down to the manageable 0.5%.
Penalty on $10,000 Debt (5 Months)
Ignored IRS (Did Nothing) ~$2,500
Hit with 5% monthly fee.
Filed Extension (Paid Later) ~$250
Only 0.5% monthly fee.
Money Saved $2,250
Just by filing a paper.
ActionResult
Ghosting IRSBank Account Seizure
Filing ExtensionPayment Plan Options

3 Ways to File Form 4868

It is free, easy, and no questions asked. You do not need to give a “reason” (like sickness) to get an extension.

Method 1: IRS Free File (Recommended)

Go to IRS.gov/FreeFile. Use any partner software to e-file Form 4868 for free. You get an instant email confirmation.

Method 2: Make a Payment (The Shortcut)

If you go to IRS Direct Pay and make a payment (even $1) selecting “Extension” as the reason, the IRS automatically processes Form 4868 for you. No paperwork needed.

Method 3: Paper Mail

Print Form 4868, fill out your Name, Address, SSN, and Estimated Tax. Mail it to the IRS address for your state (check instructions). It must be postmarked by April 15.

Warning: You Must “Estimate”

Line 4 of Form 4868 asks for “Total Tax Liability.” You cannot leave this blank or put $0 if you clearly owe money.

Pro Tip: The Safe Harbor Rule

To avoid an “Underpayment Penalty,” ensure you have paid at least:
90% of this year’s total tax, OR
100% of last year’s total tax.
If you hit these numbers via withholding or estimated payments, you are safe from penalties until Oct 15.

Frequently Asked Questions

Does an extension increase audit risk?
NO. This is a myth. In fact, rushing to file by April 15 and making mistakes is more likely to trigger an audit. Accountants often file extensions to ensure accuracy.
What about State Taxes?
Be careful. Some states (like California) grant automatic extensions if you file federal. Others (like New York) require a separate state extension form. Check your state rules.