compliance Audience: general 7 min read

IRS Penalties and Interest: How to Minimize or Remove Them

IRS failure-to-file penalties, failure-to-pay penalties, estimated tax penalties, and how to request penalty abatement.

IRS penalties can add up fast — and many taxpayers pay them unnecessarily. Whether you owe back taxes or simply missed a deadline, understanding the different penalty types, how to avoid them, and how to get them removed can save hundreds or thousands of dollars.

Key Takeaways

  • Failure-to-file is the most expensive penalty: 5% per month up to 25%.
  • Failure-to-pay is much smaller: 0.5% per month up to 25%.
  • First-Time Penalty Abatement (FTA) can erase penalties if you have a clean 3-year history.
  • Interest cannot be abated (except in rare IRS error situations), but penalties can.
  • Filing an extension avoids the failure-to-file penalty even if you cannot pay.

Types of IRS Penalties

Failure-to-File Penalty

This is the most expensive common penalty. If you do not file your return (or extension) by the deadline:

  • Rate: 5% of unpaid tax for each month or partial month the return is late.
  • Maximum: 25% of unpaid tax.
  • Minimum: If the return is more than 60 days late, the lesser of $510 or 100% of the tax owed.

Filing an extension is crucial. Even if you cannot pay, filing Form 4868 for an extension avoids this 5% per month penalty. The extension gives you until October 15 to file.

Failure-to-Pay Penalty

If you file on time but do not pay the full amount owed:

  • Rate: 0.5% of unpaid tax per month.
  • Maximum: 25% of unpaid tax.
  • Reduction: If you set up an IRS installment agreement, the rate drops to 0.25% per month.

When both penalties apply simultaneously (filed late and did not pay), the combined rate is 5% per month for the first five months, then 0.5% per month after that.

Estimated Tax Penalty (Underpayment Penalty)

If you did not pay enough tax throughout the year via withholding or estimated payments, the IRS charges an underpayment penalty:

  • Rate: The federal short-term interest rate plus 3 percentage points, applied to the underpayment for the period it was underpaid.
  • Avoid it with safe harbors: Pay at least 90% of the current-year tax, or 100% of last year’s tax (110% if prior-year AGI exceeded $150,000).

IRS Interest

Interest is not technically a penalty, but it compounds daily on any unpaid tax (including penalties). The rate is the federal short-term rate plus 3%, adjusted quarterly. For 2025, the rate is approximately 7-8%.

Key difference: The IRS can abate (remove) penalties, but it almost never abates interest except in cases of IRS error or unreasonable delay.

How to Get Penalties Removed

First-Time Penalty Abatement (FTA)

This is the easiest and most common path to penalty relief. The IRS grants FTA if:

  1. You have filed all required returns (or filed valid extensions).
  2. You have not been assessed any penalties for the prior three tax years.
  3. You have paid (or arranged to pay) the tax owed.

FTA applies to failure-to-file and failure-to-pay penalties. You can request it by:

  • Calling the IRS: 1-800-829-1040. Ask the agent to apply FTA to your account. See our IRS help guide for tips on reaching a live agent.
  • Writing a letter or submitting Form 843 (Claim for Refund and Request for Abatement).

FTA is granted per tax period. Once you use it, you need another three clean years before you can use it again.

Reasonable Cause

If you do not qualify for FTA, you can request penalty abatement based on “reasonable cause.” The IRS considers:

  • Serious illness, death of a family member, or incapacitation.
  • Natural disasters (federally declared disaster areas often get automatic relief).
  • Fire, casualty, or other disturbance that destroyed records.
  • Inability to obtain records (e.g., employer failed to provide W-2).
  • Reliance on written advice from a tax professional or the IRS itself.

Submit your request in writing with supporting documentation (medical records, disaster declarations, professional correspondence).

Statutory Exceptions

The estimated tax underpayment penalty can be waived if:

  • You retired (after reaching age 62) or became disabled during the tax year.
  • The underpayment was due to a casualty, disaster, or other unusual circumstance.

Penalty Prevention Strategies

  1. Always file on time (or file an extension). E-filing is the fastest way to meet the deadline and eliminates the expensive 5% per month failure-to-file penalty.
  2. Pay what you can by the deadline. Even a partial payment reduces the base on which penalties and interest accrue. Review the available IRS payment options including EFTPS for same-day electronic payments.
  3. Use safe harbor estimated payments. Pay 100% of last year’s tax (110% if high income) in four quarterly installments.
  4. Increase W-4 withholding. If you have investment income or side income, adjust your W-4 to withhold extra from your paycheck.
  5. Set up an installment agreement immediately. This cuts the failure-to-pay rate from 0.5% to 0.25% per month.

Penalty Amounts at a Glance

Penalty Rate Maximum Abatable?
Failure to File 5% of unpaid tax/month 25% Yes (FTA or reasonable cause)
Failure to Pay 0.5% of unpaid tax/month 25% Yes (FTA or reasonable cause)
Estimated Tax Underpayment ~7-8% annual rate No cap Yes (retirement, disability, disaster)
Interest Federal short-term + 3% No cap Rarely (only IRS error)

What to Do If You Already Owe Penalties

If you have already been assessed penalties, there are concrete steps you can take to reduce or resolve what you owe:

  1. Request First-Time Penalty Abatement by phone. Call the IRS at 1-800-829-1040 and ask the agent to check your eligibility for FTA. If you have a clean three-year compliance history, the penalty can often be removed during that single call. Our IRS help guide has tips for getting through to a live agent quickly.
  2. Consider an Offer in Compromise (OIC) if your debt is large. If the total amount (tax, penalties, and interest) is more than you can realistically pay, you may qualify for an IRS Offer in Compromise that lets you settle for less than the full balance. The IRS evaluates your income, expenses, and asset equity to determine an acceptable offer amount.
  3. Set up an installment agreement to stop the bleeding. Even if you cannot pay in full, an IRS installment plan reduces the failure-to-pay penalty rate from 0.5% to 0.25% per month and prevents more aggressive collection actions. You can apply online, by phone, or by mail.
  4. Explore all your IRS tax debt resolution options. Beyond FTA and OIC, you may qualify for Currently Not Collectible status, penalty abatement for reasonable cause, or an IRS payment plan tailored to your situation. The sooner you act, the less interest and penalties will accumulate.

How sharper.tax Helps

sharper.tax analyzes your tax return to check whether your withholding and estimated payments are sufficient to avoid underpayment penalties. We flag situations where you are at risk and recommend adjustments to your W-4 or quarterly payments. Sophisticated tax planning used to require a high-end CPA — we make it available for free.

Sources

The information above is educational and not tax advice.