Missed the Tax Deadline? Here's Exactly What to Do Next

April 15th came and went, you didn't file, and you didn't request an extension. Take a breath — this is more common than you think, and it's not the end of the world. What matters now is what you do next. The IRS has a clear process for situations exactly like this, and understanding your options can save you a significant amount of money.

This post covers everything you need to know: how the penalties work, how much they can add up to, and — importantly — how you may be able to get them reduced or eliminated entirely.

The First Thing to Do: File as Soon as Possible

Before anything else, file your return as soon as you can — even if you can't pay what you owe right now. This is the single most important step, and here's why: the failure-to-file penalty is significantly harsher than the failure-to-pay penalty. Every day you wait without filing makes the situation more expensive.

If you can't pay your full balance, file anyway and pay what you can. The IRS also offers payment plans (called installment agreements) for taxpayers who can't pay in full — but you have to file first to access them.

Penalty #1: Failure-to-File

The failure-to-file penalty applies when you miss the deadline and haven't filed an extension. The IRS calculates it as 5% of your unpaid tax balance for each month (or partial month) your return is late, up to a maximum of 25% of your unpaid taxes.

A partial month counts as a full month — so if your return is one day late, that's one full month of penalty.

Penalty #2: Failure-to-Pay

The failure-to-pay penalty is separate from the failure-to-file penalty and applies whenever you have unpaid taxes past the deadline — regardless of whether you filed on time or not. It's calculated at 0.5% of your unpaid tax balance per month, up to a maximum of 25% of your unpaid taxes.

This rate is much lower than the failure-to-file penalty, which is one of the main reasons filing quickly — even without payment — limits your total penalty exposure.

When Both Penalties Apply at the Same Time

Here's where it gets important to understand: if you didn't file and you have unpaid taxes, both penalties can run simultaneously. However, the IRS does provide a small relief — when both apply in the same month, the failure-to-file rate is reduced by the failure-to-pay rate, bringing it from 5% down to 4.5% per month.

Even with that reduction, the combined penalties add up quickly when both are in play.

Note that the IRS also charges interest on unpaid balances on top of penalties. Interest is currently calculated at the federal short-term rate plus 3%, compounded daily. It's not enormous, but it does add up the longer a balance goes unpaid.

Getting Penalties Reduced: First Time Abatement (FTA)

This is where many taxpayers leave money on the table simply because they don't know it exists. The IRS offers a program called First Time Abatement (FTA) that can eliminate failure-to-file and failure-to-pay penalties entirely — and requesting it is simpler than most people expect.

Who qualifies for FTA?

To qualify for First Time Abatement, you need to meet all three of the following conditions:

• You have no penalties (or only an estimated tax penalty) on your tax account for the three tax years prior to the year you're requesting abatement for
• You have filed all required returns, or filed a valid extension for the current year
• You have paid, or arranged to pay (via installment agreement), any tax currently owed

In plain terms: if this is essentially your first time getting into trouble with a late filing or late payment in recent years, and your prior compliance record is clean, you have a strong case for FTA.

How to request FTA

There are two ways to request First Time Abatement:

• By phone: Call the IRS at 1-800-829-1040. This is often the fastest route. Explain that you're requesting penalty abatement under the First Time Abatement policy. Have your tax account information ready. Many FTA requests are granted on the spot during the call.
• By mail: Send a written request to the IRS service center that processed your return. Include your name, address, Social Security number, the tax year and form in question, the penalty amount you're requesting relief for, and a clear statement that you're requesting First Time Abatement. Always send any mail to the IRS via Certified Mail with Return Receipt — this gives you proof of exactly when the IRS received your correspondence, which can matter if there's ever a question about timing.

Once granted, the IRS will send you a notice confirming the abatement and adjust your account balance accordingly.

If You Don't Qualify for FTA: Reasonable Cause Abatement

If you don't meet the criteria for First Time Abatement — perhaps because you had a penalty in a prior year — you may still be able to get relief through Reasonable Cause abatement. This one requires more documentation and judgment on the IRS's part, but it's a legitimate path worth pursuing.

What counts as reasonable cause?

The IRS evaluates reasonable cause on a case-by-case basis. Circumstances that have historically been accepted include:

• Serious illness, injury, or death of the taxpayer or an immediate family member
• A natural disaster, fire, or other casualty that destroyed records or made filing impossible
• Inability to obtain records necessary to file despite genuine efforts
• Reliance on incorrect advice from a tax professional (documented)
• Significant mental or emotional incapacity during the filing period

General forgetfulness, being busy, or not having enough money to pay does not typically qualify as reasonable cause on its own. The IRS looks for circumstances genuinely outside your control that prevented you from filing or paying on time.

How to request Reasonable Cause abatement

Reasonable Cause requests are almost always done in writing. You'll need to:

• Write a clear, factual letter explaining the circumstances that caused the failure to file or pay
• Include dates that show the timeline of what happened
• Attach any supporting documentation — medical records, insurance claims, a letter from a doctor, or any other evidence that supports your case
• State the specific penalty amount you're requesting relief for
• Send it to the IRS service center that issued the penalty notice

Be factual and straightforward. The IRS reads a lot of these letters — a clear, honest explanation supported by documentation is more effective than an emotional appeal without evidence.

When to Get Professional Help

For straightforward situations — a missed deadline with no prior penalty history and a modest balance owed — many people can handle the filing and an FTA phone call on their own. But there are situations where bringing in a professional is worth it:

• Your unpaid balance is large and you're unsure how to structure a payment plan
• You're pursuing Reasonable Cause abatement and need help building your case
• You've received an IRS notice and aren't sure what it means or how to respond
• Multiple years of unfiled returns are involved
• You're considering an Offer in Compromise to settle for less than the full amount owed

A tax professional — whether an Enrolled Agent, CPA, or registered tax preparer — can communicate directly with the IRS on your behalf, help you understand your full liability, and in many cases negotiate a better outcome than you'd reach on your own.