The penalty for not filing runs ten times faster than the penalty for not paying; the IRS files a return on your behalf that includes the standard deduction but leaves out itemized deductions, credits, and dependents you could have claimed, and the clock the IRS runs on to assess tax against you never starts at all.
Filing a return you cannot pay is a manageable problem. Not filing is a compounding one. This page explains what actually happens, in what order, and what it takes to get back to compliant. Figures are current for the 2025 tax year and sourced to the Internal Revenue Code and IRS guidance.
It depends on your gross income, your filing status, and your age. For the 2025 tax year, these are the thresholds from IRS Publication 501.
| Filing status | Under 65 | 65 or older |
|---|---|---|
| Single | $15,750 | $17,750 |
| Married filing jointly | $31,500 | $33,100 if one spouse is 65 or older, $34,700 if both are |
| Married filing separately | $5 | $5 |
| Head of household | $23,625 | $25,625 |
| Qualifying surviving spouse | $31,500 | $33,100 |
Two things override that table. If you had $400 or more in net earnings from self-employment, 26 U.S.C. § 6017 requires a return regardless of your gross income. And if you had tax withheld and are owed a refund, you have to file to get it, whether or not you were required to.
You can check your own situation with the IRS tool for whether you need to file a tax return. Where that tool and Publication 501 disagree, the publication controls.
Five percent of the unpaid tax per month, capped at 25%, which is ten times the rate for paying late.
| Penalty | Rate | Cap | Statute |
|---|---|---|---|
| Failure to file | 5% of the unpaid tax per month or part of a month | 25% | 26 U.S.C. 6651(a)(1) |
| Failure to pay | 0.5% of the unpaid tax per month or part of a month | 25% | 26 U.S.C. 6651(a)(2) |
| Minimum penalty, return more than 60 days late in 2026 | The lesser of $525 or 100% of the tax due | Not applicable | 26 U.S.C. 6651(a) |
| Failure to pay after a final notice of intent to levy | Rises to 1% per month, beginning 10 days after the notice | 25% | 26 U.S.C. 6651(d) |
| Fraudulent failure to file | 15% per month | 75% | 26 U.S.C. 6651(f) |
| Interest on the unpaid balance | Federal short-term rate plus 3 points, compounded daily | None | 26 U.S.C. 6601, 6621, 6622 |
Two details get misreported constantly. When both penalties run in the same month, § 6651(c)(1) reduces the filing penalty by the payment penalty, so the combined rate is 5% per month rather than 5.5%. And the minimum penalty is a floor that only applies after 60 days, not a flat fee charged on day one.
Interest changes quarterly, so check the current quarterly rate rather than relying on a figure printed anywhere, including here.
Because of basic math. On a $20,000 balance, five months of not filing costs $5,000. Five months of filing on time and not paying costs $500. Our page on failure to file penalties covers how the IRS proves these and where reasonable cause fits.
A return the IRS prepares using information available to it, including information reported by third parties, generally giving you the standard deduction but not the itemized deductions, credits, or dependents you might have claimed, and an unfavorable filing status.
26 U.S.C. § 6020(b) provides that where a person fails to file, “the Secretary shall make such return from his own knowledge and from such information as he can obtain,” and that a return so made “shall be prima facie good and sufficient for all legal purposes.”
In practice, that means gross proceeds without basis, wages without itemized deductions, and no dependents. Internal Revenue Manual 5.18.1.6.11.2 states the point directly: the automated substitute for return program “only uses filing statuses of single or married filing separately when preparing a proposed assessment.”
The resulting tax bill may be substantially higher than what you actually owe. The fix is to file a real return, and the IRS will typically adjust the assessment accordingly, though the process varies depending on how far along collection is.
One useful piece of law here: under § 6501(b)(3), a return the IRS executes under § 6020(b) “shall not start the running of the period of limitations on assessment and collection.” The substitute does not buy you a clock.
There is generally no limitation period for assessment when you never file.
26 U.S.C. § 6501(c)(3) is one sentence: “In the case of failure to file a return, the tax may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time.”
The ordinary three-year assessment period only begins when a return is filed. A 2011 tax year with no return is as open today as it was in 2012. Filing generally starts the ordinary assessment clock, though fraud and substantial omissions of income carry their own extended or unlimited periods even on a filed return.
Yes, permanently. More than 1.3 million people had unclaimed 2022 refunds when the IRS issued its 2026 warning.
Section 6511 generally imposes a three-year period from filing or a two-year period from payment, subject to the statute’s lookback rules and other exceptions. The trap is in § 6511(b)(2), which caps the recoverable amount to what was paid during the lookback period. Under § 6513(b), withholding is deemed paid on the original due date. So once you pass three years from that due date, the lookback no longer reaches your withholding, and the recoverable amount is zero.
The scale is real. The IRS reported that roughly $1.2 billion in refunds for the 2022 tax year went unclaimed, with a national median of $686. In Michigan alone, about 41,400 people left an estimated $36.9 million on the table, with a median of $707 each. That deadline passed in April 2026, and the money is gone.
If you have unfiled years that are owed refunds, the oldest one is on a clock that does not stop.
Information returns. Every W-2, 1099, 1098, K-1, and broker statement filed under your Social Security number lands in an IRS system that knows whether a matching return arrived.
When it does not, a notice sequence starts.
| Notice | What it says | What it wants |
|---|---|---|
| CP59 | No record that you filed your prior year personal tax return | File the return or explain why you do not need to |
| CP516 | A previous notice was sent, and there is still no record of the return | File, or return Form 15103 |
| CP518 | Final reminder, still no record of the return | File, or return Form 15103 |
| CP3219N | A notice of deficiency computing the tax for you | File a Tax Court petition within 90 days, or the assessment becomes final |
Our page on IRS notices for unfiled tax returns covers the full notice set, including the business series.
The 90-day deadline is strict. If you miss it, you generally lose the right to petition the Tax Court over that notice.
The IRS describes it plainly: “The CP3219N is a Notice of Deficiency (90-day letter). If you want to challenge our proposed tax, you have 90 days from the date shown on your notice to file a petition with the Tax Court.” Taxpayers outside the country get 150 days.
The clock runs from the date printed on the notice, not from the day you opened it. Miss it without filing a petition or otherwise resolving the matter, and the IRS can proceed to assess the substitute-for-return figure. You generally have to pursue a post-assessment remedy rather than challenge the deficiency in Tax Court, which, depending on the circumstances, may mean audit reconsideration or paying the tax and pursuing a refund claim.
Both are slower and harder than a timely petition. See the IRS page on understanding your CP3219N notice.
Six, in the normal case. That is IRS policy rather than statute, and it has some give in both directions.
IRS Policy Statement 5-133, at IRM 1.2.1.6.18, sets the rule: enforcement of delinquency procedures normally runs no more than six years, and going beyond that requires prior managerial approval.
Two things people miss. The policy lists factors that can push enforcement past six years, including a prior history of noncompliance and income from illegal sources. And managerial approval is also required to accept fewer than six, so the six-year figure is a norm, not a ceiling you can assume.
None of this changes § 6501(c)(3). The six-year policy governs what the IRS will chase. It does nothing to the unlimited assessment period on a year you never filed.
Sometimes, on reasonable cause, and sometimes automatically on a clean compliance history.
Reasonable cause. Section 6651 waives the penalty where the failure “is due to reasonable cause and not due to willful neglect.” Serious illness, a death in the immediate family, destruction of records, and reliance on incorrect written advice are the arguments that work. Not having the money is not reasonable cause for failing to file.
Administrative relief changed in 2026. First Time Abate had been the standard waiver for taxpayers with three prior years of clean compliance. The IRS began rolling out Automatic Exemption from Penalty (AEP) in summer 2026, applying to eligible 2025 tax year returns and later, and requiring three prior years of timely filing and payment for annual returns. The practical difference is significant: under the old program the penalty was assessed and then removed on request, and under AEP, for eligible returns, qualifying failure-to-file, failure-to-pay, and failure-to-deposit penalties are not assessed in the first place, and no taxpayer action is required.
AEP can apply to failure-to-file penalties under § 6651(a)(1), failure-to-pay penalties under § 6651(a)(2) and (a)(3), and failure-to-deposit penalties under § 6656, when its eligibility requirements are met. First Time Abate remains available for certain returns during the transition. Current terms are on the IRS page for administrative penalty relief. Confirm which regime applies to your year before relying on either.
It is possible, and it is rare. Willful failure to file is a misdemeanor under 26 U.S.C. § 7203, punishable by up to one year per year not filed.
In fiscal year 2025, the IRS non-filer program initiated 245 investigations nationwide and sentenced 126 people. Against roughly 160 million individual returns, that is not the realistic risk for someone who is behind and wants to fix it. Criminal cases generally involve willful conduct, and the facts vary from case to case.
Filing voluntarily before the IRS contacts you can be an important fact in your favor. Our page on whether you can go to jail for not paying taxes covers the criminal side in detail, and criminal tax defense explains what happens if an investigation has already started.
Pull your transcripts. Wage and income transcripts can provide much of the third-party information needed to reconstruct a return. Filing in order, starting with the year closest to losing its refund, protects money that otherwise disappears.
Getting the required returns filed is generally the first step before pursuing an installment agreement, offer in compromise, or currently-not-collectible status. Our overview of IRS payment plans covers the options, and our unfiled tax returns service page explains how we handle a multi-year catch-up.
If any unfiled year involves substantial income or special issues, stop and get advice before you file anything. A late return is a document signed under penalties of perjury, and the order in which you fix things matters.
Many non-filer cases can be resolved by getting the required returns filed and addressing any resulting tax debt through payment options or penalty relief when available.
Ayar Law handles unfiled returns and IRS collection matters across Michigan from offices in Farmington Hills and Grand Rapids. Call (248) 262-3400 to request a case review, or contact us through our website.
This page is general information about federal tax law and procedure. It is not legal advice, and reading it does not create an attorney-client relationship. Filing thresholds, penalty minimums, and interest rates change every year, and IRS penalty relief programs are in transition during 2026. Outcomes depend on the facts of each case, and prior results do not predict future outcomes. Speak with a licensed tax attorney about your own situation before filing delinquent returns.
