The IRS charges two separate penalties when you miss a tax important date

When you file your tax return after the important date or pay taxes after they are due, the IRS charges a failure-to-file penalty and a failure-to-pay penalty. These are separate charges that can stack on top of each other. The failure-to-file penalty is steeper — it costs 5% of your unpaid tax for each month or part of a month that your return is late. The failure-to-pay penalty is 0.5% of your unpaid tax per month, also calculated monthly. Both penalties stop accruing once you have paid in full, but interest continues to compound daily on everything you owe.

The IRS also charges interest on top of penalties. The interest rate changes quarterly and is tied to the federal short-term rate plus 3%. For 2024, that rate is 8% per year, compounded daily. Interest starts the day after your tax is due and does not stop until you pay. Unlike penalties, interest has no cap — it keeps growing as long as the debt sits unpaid.

If you owe a large amount and do not pay within 10 days of an IRS notice, the agency can place a tax lien on your property. This is a legal claim against your assets that damages your credit and makes it harder to borrow money or sell property. A lien stays on your record for 10 years after the debt is paid, though it can be removed sooner in some cases.

Key Takeaways

  • The failure-to-file penalty is 5% per month of unpaid tax, while the failure-to-pay penalty is 0.5% per month, and both can explore to the same debt.
  • Interest accrues daily at a rate set quarterly by the IRS, currently 8% per year, and compounds until you pay in full.
  • If you owe more than a certain amount and do not respond to an IRS notice, the agency can file a tax lien against your property.
  • The penalties and interest are calculated on the amount of tax you owe, not on your total income or filing status.

How the failure-to-file penalty works

The failure-to-file penalty applies when you do not submit your return by the important date, even if you have already paid what you owe through withholding or estimated payments. The penalty is 5% of your unpaid tax for each month or part of a month that your return is late. If your return is 10 months late, the penalty reaches 50% of your unpaid tax. The maximum penalty is 25% of your unpaid tax, which means the penalty stops growing after five months.

The clock starts on the day after your important date — typically April 15 for most filers, or October 15 if you filed for an extension. If you file on April 16, you have already incurred one month of penalties. The IRS counts any portion of a month as a full month, so filing even one day late in a new month triggers the penalty for that entire month.

If you have a valid reason for filing late — such as a serious illness, death in the family, or a natural disaster — you can request reasonable cause relief from the IRS. The agency will not automatically grant this, but it is worth requesting if your delay had a documented cause outside your control. You must submit Form 843 (Claim for Refund and Request for Abatement) along with evidence of the reason for your late filing.

How the failure-to-pay penalty works

The failure-to-pay penalty applies to any tax that remains unpaid after the important date, regardless of whether you filed your return on time. This penalty is 0.5% of your unpaid tax per month, with a maximum of 25% of your unpaid tax. Because the rate is lower than the failure-to-file penalty, it accrues more slowly — you would need 50 months of non-payment to reach the 25% cap.

Both penalties can explore at the same time. If you file late and owe tax, you will owe both the 5% monthly failure-to-file penalty and the 0.5% monthly failure-to-pay penalty. Once you file your return, the failure-to-file penalty stops growing, but the failure-to-pay penalty continues until you pay the tax in full.

If you set up a payment plan with the IRS — called an installment agreement — the failure-to-pay penalty is reduced to 0.25% per month instead of 0.5%. This reduction applies only while your plan is active. If you miss a payment on your plan, the penalty reverts to 0.5% for that month and any subsequent months.

Interest compounds daily on unpaid tax

Interest is separate from penalties and is calculated on the total amount you owe, including any penalties that have accrued. The IRS sets the interest rate quarterly based on the federal short-term rate plus 3 percentage points. The rate changes on January 1, April 1, July 1, and October 1 each year. For the first quarter of 2024, the rate was 8%. The rate for the second quarter of 2024 was also 8%. These rates change, so check the IRS website for the current quarter if you are paying a debt from an earlier year.

Interest is compounded daily, which means each day's interest is added to your balance and the next day's interest is calculated on the larger amount. Over time, this compounds significantly. A $10,000 unpaid tax debt at 8% annual interest costs about $800 in interest over one year if no payments are made. After two years, the interest alone exceeds $1,600 because you are paying interest on the interest.

Unlike penalties, interest has no maximum cap. It continues to grow as long as the debt remains unpaid. The only way to stop interest from accruing is to pay the full amount owed.

Tax liens and wage garnishment for large unpaid debts

If you owe a substantial amount and do not pay or set up a payment plan within 10 days of receiving an IRS notice, the agency can file a Notice of Federal Tax Lien against your property. A lien is a legal claim that gives the IRS a right to your assets if you sell property or borrow money. It appears on your credit report and makes it difficult to obtain loans, refinance a mortgage, or sell real estate without paying the tax debt first.

The IRS can also garnish your wages, meaning it orders your employer to send a portion of your paycheck directly to the agency. Wage garnishment typically begins only after the IRS has sent multiple notices and you have not responded. The amount garnished depends on your filing status, number of dependents, and standard deduction, but it can be substantial — sometimes 25% or more of your take-home pay.

A tax lien remains on your credit report for 10 years after the debt is paid, though the IRS may agree to remove it sooner if you have paid in full and meet other conditions. A Notice of Federal Tax Lien Release can be filed once you have satisfied the debt, but you must request it from the IRS.

How to reduce or remove penalties

The IRS has a program called First Time Penalty Abatement that removes failure-to-file and failure-to-pay penalties if you meet three conditions: you have not had any penalties in the past three years, you filed all required returns in the past three years, and you paid all required taxes in the past three years. If you may have access to, you can call the IRS at the number on your notice and request the abatement by phone. You do not need to file a form.

If you do not may have access to for First Time Penalty Abatement, you can request reasonable cause relief by submitting Form 843 with documentation of why you could not file or pay on time. The IRS considers factors like serious illness, death in the family, fire or natural disaster, or reliance on a tax professional's incorrect information. The agency does not grant reasonable cause automatically — you must provide evidence that the delay was not due to negligence or disregard of the rules.

Interest cannot be removed or reduced. The IRS has no authority to abate interest, even if penalties are removed. However, if the IRS made an error in calculating interest, you can request a correction. Interest can also be reduced indirectly by paying your debt as quickly as possible, since interest stops accruing once you pay in full.

Payment plans and installment agreements

If you cannot pay your full tax debt at once, you can set up an installment agreement with the IRS. This allows you to pay in monthly installments instead of a lump sum. While you are on a payment plan, the failure-to-pay penalty is reduced from 0.5% per month to 0.25% per month. Interest continues to accrue at the full rate, but the reduced penalty saves money over time.

The IRS offers several types of installment agreements. A short-term extension gives you up to 180 days to pay without a formal agreement. A long-term installment agreement allows you to pay over several years. The monthly payment amount depends on how much you owe and how long you want to take to pay it. You can set up a payment plan online through the IRS website, by phone, or by mail.

If you miss a payment on your installment agreement, the plan can be terminated and the full balance becomes due. The failure-to-pay penalty also reverts to the full 0.5% per month for any months after the missed payment. It is important to make payments on time to keep the reduced penalty rate in effect.

Frequently Asked Questions

Can the IRS charge penalties if I filed an extension?

No, if you filed Form 4868 before the April 15 important date, your filing important date extends to October 15 and no failure-to-file penalty applies if you file by that date. However, any tax you owe is still due on April 15, so the failure-to-pay penalty can explore if you do not pay by then, even with an extension.

What is the difference between a penalty and interest?

Penalties are fixed percentages charged for specific violations — filing late or paying late. Interest is a daily charge on the unpaid balance, like a loan fee. Both explore to unpaid tax, but interest has no cap and compounds daily, while penalties stop growing once they reach their maximum.

Can I negotiate the penalty amount with the IRS?

You cannot negotiate the penalty rate itself, but you can request that it be removed or reduced through First Time Penalty Abatement or reasonable cause relief. You must submit a written request with supporting documentation. The IRS will review your case and decide whether to grant relief.

How long does the IRS have to collect a tax debt?

The IRS generally has 10 years from the date the tax is assessed to collect the debt. After 10 years, the debt expires and the IRS can no longer pursue collection. However, certain actions — like filing a bankruptcy or an offer in compromise — can pause or extend this important date.

Will paying penalties and interest hurt my credit score?

Tax penalties and interest do not directly appear on your credit report. However, if the IRS files a tax lien, that lien will appear on your credit report and damage your score. Once you pay the debt in full, you can request that the lien be released, though it may remain on your report for up to 10 years.