IRS penalties are not arbitrary. They follow a predictable structure, and in many cases, they are entirely avoidable if you understand the rules. Yet every year, millions of taxpayers pay billions of dollars in penalties that could have been reduced or eliminated with the right planning and timely action. Knowing how each penalty works — and what defenses exist — is the first step toward keeping that money in your pocket.
Failure-to-File Penalty
This is the most expensive common penalty. If you do not file your return by the deadline, including extensions, the IRS charges 5 percent of the unpaid tax for each month or partial month the return is late, up to a maximum of 25 percent. The penalty begins accruing the day after the deadline. A return that is five months late has already accumulated the full 25 percent maximum. What many taxpayers do not realize is that the penalty is calculated on the unpaid tax balance — not the total tax on your return. If you overpaid through withholding and are owed a refund, there is no failure-to-file penalty because there is no unpaid tax. But if you owe even one dollar, the clock is running.
If you owe taxes and cannot pay, filing on time and paying what you can is always better than not filing at all. Filing and paying nothing triggers only the failure-to-pay penalty. Not filing triggers both, and the failure-to-file penalty is ten times more costly per month.
New Jersey assesses its own failure-to-file penalty independently. The state charges 5 percent of the tax due for each month or part of a month the return is late, up to 25 percent. Missing both the federal and state deadline doubles your penalty exposure.
Failure-to-Pay Penalty
Separate from the filing penalty, the failure-to-pay penalty is 0.5 percent of the unpaid tax per month, also capped at 25 percent. This penalty runs concurrently with the filing penalty when both apply, but the filing penalty is reduced by the amount of the payment penalty for any month both are charged — so the combined maximum for any given month is 5 percent, not 5.5 percent. Interest compounds on top of both penalties, calculated daily at the federal short-term rate plus three percentage points. On a $10,000 balance, a year of combined penalties and interest can easily add $2,000 or more to the total owed.
If you enter into an approved installment agreement with the IRS, the failure-to-pay penalty rate is reduced to 0.25 percent per month while the agreement is in effect. This is one concrete financial benefit of formalizing a payment plan rather than simply making sporadic payments without an agreement in place.
Estimated Tax Penalty
If you are required to make quarterly estimated payments and underpay, the IRS assesses a penalty calculated on the shortfall for each quarter. The penalty rate fluctuates with federal interest rates. The safe harbor rules — paying at least 100 percent of last year's tax or 90 percent of the current year's tax — are the most reliable way to avoid this charge. Note that each quarter is evaluated independently: a large Q4 payment does not retroactively cure a Q1 shortfall. Each quarter that was underpaid carries its own penalty, calculated from the payment due date through the date you actually paid.
Accuracy-Related Penalty
The IRS imposes a 20 percent penalty on any portion of an underpayment attributable to negligence, disregard of rules, or a substantial understatement of income. A substantial understatement generally means the understatement exceeds the greater of 10 percent of the correct tax or $5,000. This penalty is frequently assessed alongside audit adjustments. If the IRS audits your return and determines you owe an additional $8,000 in tax, an accuracy-related penalty would add another $1,600 on top of the deficiency. Proper documentation and a reasonable basis for every position taken on your return are your best defenses.
Real-World Scenario
A Haddon Township freelance graphic designer filed her 2024 return on time but made no estimated tax payments during the year. She owed $7,200 when she filed. The IRS assessed an underpayment penalty for each of the four quarters she should have been paying — totaling approximately $285 — plus interest on the balance. A simple safe harbor payment strategy, paying four equal installments based on her prior year tax, would have eliminated that penalty entirely. The total cost of ignoring estimated taxes was over $400 when interest was added to the penalty.
How to Get Penalties Reduced or Removed
The IRS offers several avenues for penalty relief. First-time penalty abatement (FTA) is available if you have a clean compliance history for the prior three years — meaning you filed on time and paid what was owed for the three years preceding the penalty year. FTA does not require you to explain why you were late; a clean prior record is sufficient. This relief can be requested by phone or in writing and is one of the most underutilized tools in tax representation.
Reasonable cause relief applies when circumstances beyond your control — serious illness, a natural disaster, the death of an immediate family member, or documented reliance on incorrect professional advice — prevented timely compliance. Requesting reasonable cause relief requires a formal written request with supporting documentation. The IRS evaluates these requests on a case-by-case basis, and the quality of the submission matters significantly.
HofflerSmith Financial Services regularly secures penalty abatements for clients who qualify. We evaluate your penalty history, identify the strongest relief argument, and submit the request on your behalf.
Frequently Asked Questions
Q: Can I get penalties waived if I just could not afford to pay?
A: Inability to pay alone does not constitute reasonable cause for penalty abatement. However, if the financial hardship was accompanied by a documented extraordinary circumstance — a major medical crisis, for example — that may support a reasonable cause argument. FTA is often a more reliable route if your compliance history qualifies.
Q: What is the Trust Fund Recovery Penalty, and who does it apply to?
A: The Trust Fund Recovery Penalty (TFRP) applies to individuals responsible for collecting and remitting payroll taxes who willfully failed to do so. It is equal to 100 percent of the unpaid trust fund taxes — meaning the IRS can assess the full unpaid amount personally against business owners, officers, or anyone with signature authority over payroll. It is one of the most severe penalties in the tax code and applies to both federal and, separately, New Jersey payroll tax obligations.
Q: I filed late but got a refund. Do I owe a penalty?
A: No. The failure-to-file penalty is calculated on unpaid tax. If your return showed a refund, there was no unpaid tax balance and no penalty is assessed for late filing. However, you should be aware that there is a three-year window to claim a refund; if you file more than three years after the original due date, the IRS may not issue the refund.
Facing IRS penalties you believe are unfair? Let our team review your case and determine whether relief is available.