What Happens If I Miss the Tax Deadline?
Short Answer
If you miss the April 15 tax filing deadline, you face two separate penalties: a failure-to-file penalty (up to 25% of your tax owed) and a failure-to-pay penalty (0.5% per month). The good news: filing an extension can eliminate the failure-to-file penalty, and setting up an installment agreement stops the failure-to-pay penalty from accruing.
Immediate Consequences of Missing the Deadline
Failure-to-File Penalty
This is the IRS primary penalty for late filing. It is assessed at 5% of the unpaid tax for each month (or part of a month) your return is late, up to a maximum of 25%. If your return is more than 60 days late, the minimum penalty is the lesser of $485 (in 2025, adjusted annually for inflation) or 100% of the tax you owe.
The good news: if you requested an extension (Form 4868) by April 15, you are protected from this penalty until October 15, even though you filed late.
Failure-to-Pay Penalty
This penalty accrues at 0.5% of your unpaid tax balance per month, up to a maximum of 25%. If you set up an installment agreement, the failure-to-pay penalty drops to 0.25% per month while the agreement is active.
The key distinction: this penalty applies to the amount you owe, not the fact that you filed late. If you filed on time but did not pay, you still face this penalty.
Interest Charges
Interest compounds daily on any unpaid tax balance. As of early 2025, the IRS interest rate is set at the federal short-term rate plus 3%. For individuals, this currently works out to approximately 7-8% per year. Interest is charged on both the tax owed and the penalties, so the longer you wait, the more you owe.
What To Do Right Now
Option 1: File an Extension Immediately
If you have not yet filed but need more time, submit Form 4868 electronically as soon as possible. The IRS accepts extensions online through its Free File program or most tax software. This extends your filing deadline to October 15, but it does not extend your payment deadline.
Option 2: File Now and Pay What You Can
If you owe money, file your return as soon as possible. The failure-to-file penalty accrues for every month you wait, so the sooner you file, the less you pay in penalties. Pay as much as you can to reduce the tax balance, interest is charged on the outstanding amount, not the original tax bill.
Option 3: Set Up an Installment Agreement
If you cannot pay in full, the IRS offers payment plans. You can apply online at the IRS website (Online Payment Agreement). For balances up to $50,000, you can set up a monthly direct debit plan for up to 72 months. Setup fees are $31-$130 depending on your income and plan type, but low-income applicants may qualify for a reduced fee.
If You Are Owed a Refund
There is no failure-to-file or failure-to-pay penalty if you are owed a refund, but you still need to file to claim it. The IRS can only hold refunds for a limited time. If you file late and are owed a refund, you may receive it with a delay, but you will not be penalized. Note that the IRS is not required to pay interest on refunds issued after 45 days from the filing date.
What If You Cannot Pay at All?
If you genuinely cannot pay and have no options, you may qualify for the IRS Currently Not Collectible (CNC) status. This temporarily pauses collection efforts because of financial hardship. You will still owe the taxes, and interest continues to accrue, but the IRS will not garnish wages or seize assets. To apply, call the IRS at 1-800-829-1040 and explain your situation.
Bottom Line
Missing the tax deadline is serious but manageable. File an extension if you need more time, pay as much as you can to reduce interest and penalties, and set up an installment agreement if you cannot pay in full. Do not ignore the problem, the IRS is patient but persistent, and the penalties compound monthly.
