How Long Can the IRS Come After You? Audit and Collection Limits

For most taxpayers, the IRS has three years to audit a filed return and ten years to collect a tax debt once it has been assessed. Those are the two deadlines that answer how long the IRS can come after you, and they cover the majority of situations. But each one has exceptions that can shorten the window, stretch it out, freeze it temporarily, or remove it entirely, so the right answer for your situation depends on what you filed, what you left off, and what has happened since.

The Three-Year Audit Window

Before the IRS can collect anything, it has to determine that you owe more than you paid. That determination is called an assessment. Federal law generally gives the IRS three years after you file a return to assess additional tax.¹

One detail catches people off guard. If you file early, the IRS treats the return as filed on the due date. A 2025 return filed on February 15, 2026 doesn’t start the clock until April 15, 2026. If you file late, the clock starts on the actual filing date, which gives the IRS more calendar time to work with.¹

During this three-year window, agents can examine your return, request documentation, and challenge deductions or credits. If they find a discrepancy, they issue a notice of deficiency with the proposed changes and additional amount owed. Once the three years pass without an assessment, the IRS loses the authority to change the numbers on that return. For someone with straightforward W-2 income, this is often the only deadline that matters.

When the Audit Window Stretches to Six Years

Certain omissions buy the IRS extra time. Leave off more than 25 percent of your gross income and the assessment window doubles from three years to six. The IRS doesn’t have to show you intended to hide anything — a large enough omission alone triggers the extension.²

A separate rule targets foreign financial assets. Omit more than $5,000 in income tied to specified foreign financial assets and the IRS also gets six years, whether or not the 25 percent threshold is met.³²

These extended periods tend to surface with self-employment income, rental properties, and complex investment structures, where income can be easy to misreport.

When There Is No Time Limit at All

Two situations remove the statute of limitations entirely and give the IRS unlimited time to assess and collect.

The first is fraud. If you file a false or fraudulent return with the intent to evade tax, the IRS can assess additional tax at any time. An audit can come decades later. The same unlimited window applies to any willful attempt to defeat or evade tax, though this goes beyond honest mistakes or negligent omissions and requires a deliberate effort to evade.¹

The second is failing to file. If you never file a return for a given year, the three-year clock never starts. The IRS can assess whenever it wants, five years later or thirty.¹

The practical consequence of the non-filing rule is significant. People sometimes skip a year assuming the IRS won’t notice, especially if income was modest. But the clock cannot run on a return that doesn’t exist. Filing a late return, even years late, actually starts the three-year clock. Not filing keeps the exposure open indefinitely.

The Ten-Year Collection Clock

Once the IRS assesses a tax debt, meaning it formally records the liability on its books, a separate ten-year clock begins. This is the Collection Statute Expiration Date, or CSED. The IRS must collect by levy or court proceeding within ten years of the assessment, or it loses the legal authority to pursue you.⁴

During the ten years, the IRS has powerful tools. It can place a federal tax lien on your property to secure the government’s claim against your home, car, or other assets. It can issue levies to seize bank accounts, retirement funds, rental income, and the cash value of life insurance policies. It can garnish your wages, redirecting part of each paycheck to the Treasury until the balance is paid or the levy is released.⁵⁶

The ten years run from the assessment date, not from the tax year the debt relates to. If you filed your 2020 return on time in April 2021 and the IRS assessed an additional balance in June 2023 after an audit, the CSED runs from June 2023. Each separate assessment on your account has its own CSED, so debts for multiple years can expire on different dates.

What Happens When the Ten Years Expire

Once the CSED passes, the IRS can no longer take collection action on that assessment. It cannot levy your bank account, garnish your wages, or file a new lien. If a levy on future income like wages was already in place before the CSED expired, the IRS can continue receiving payments from that levy, but it cannot start new enforcement.⁷

Expiration doesn’t require you to do anything. No paperwork, no request to stop collecting. The legal authority simply runs out. If a federal tax lien was filed in the public record, you may still need to contact the IRS to get the lien formally released so it stops appearing in title searches and credit reports.

One detail most people miss: if you kept paying after the CSED expired because you didn’t realize the deadline had passed, you can request a refund of those overpayments, as long as you file the claim before your refund deadline runs out.⁷

Events That Pause the Collection Clock

The ten-year clock doesn’t always run continuously. Certain events toll the countdown, freezing it in place until the event resolves. The CSED is then pushed back by the exact time it was paused. This is where people who think they’re near the finish line get caught: a two-year suspension means the debt survives two years longer than expected.

Bankruptcy. Filing a bankruptcy petition suspends both the assessment and collection clocks for the entire time the case is pending, plus six months after it concludes.⁸
Offer in Compromise. Submitting a proposal to settle for less than the full amount pauses the clock from the date the offer is pending until it is accepted, rejected, returned, or withdrawn. A rejection adds another 30 days, and longer if you appeal.⁹
Collection Due Process hearing. Requesting a CDP hearing suspends the clock from the date the IRS receives your request until the determination becomes final, including any court appeals.⁹
Tax Court petition. If you petition the Tax Court after receiving a notice of deficiency, the IRS cannot assess or collect the disputed amount until the court’s decision becomes final.¹⁰
Innocent spouse relief. Filing Form 8857 suspends the collection period for the tax year in question while the request is pending. Once resolved, the CSED is extended by that time plus 60 days.¹¹
Living outside the United States. If you’re outside the country for a continuous period of at least six months, the collection clock freezes for the entire time you’re abroad.⁸

While the clock is paused, the IRS is generally prohibited from active collection like seizing assets or garnishing wages. Interest and penalties, however, continue to accrue during the suspension.¹¹

Installment Agreements

A standard installment agreement does not suspend or extend the CSED. The ten-year clock keeps running while you make monthly payments, and any balance still outstanding when the CSED arrives becomes unenforceable.¹²

The process of requesting an installment agreement does trigger brief pauses. The CSED is suspended while the request is pending, for 30 days after a rejection, and during any appeal. The same happens when an existing agreement is terminated. These pauses are usually short, but they add up if you have been through multiple rounds of negotiation.¹²

Extensions You Sign Voluntarily

The IRS can also get more time if you agree to give it. During an audit, agents may ask you to sign Form 872, which extends the three-year assessment deadline to a specific future date. Signing is voluntary. You have the right to refuse or to limit the extension to specific issues or a shorter time period.¹³

Why would anyone agree? Usually because the alternative is worse. If the audit is still open and the three-year window is about to close, the IRS may issue a deficiency notice based on incomplete information rather than lose the ability to assess. Signing the extension gives both sides time to reach a fair result. Refusing doesn’t make the audit go away.

On the collection side, extensions are more limited. The IRS can secure a waiver extending the ten-year collection period, but current rules restrict this primarily to partial payment installment agreements. These waivers are generally capped at five years plus up to one year for changes.¹²

Criminal Prosecution Runs on a Separate Clock

Everything above is civil enforcement, meaning the IRS assessing tax, imposing penalties, and collecting money. Criminal prosecution for tax crimes is separate. The general statute of limitations for criminal tax offenses is three years from the date the crime was committed, but the most serious offenses get six years.¹⁴

The six-year criminal deadline applies to willfully attempting to evade or defeat any tax, filing a false or fraudulent return, willfully failing to file or pay when due, defrauding or attempting to defraud the United States, and helping prepare a false return, claim, or document.¹⁴

Criminal prosecution is rare, and the IRS criminally investigates a tiny fraction of taxpayers each year. But when it does happen, a criminal case requires proof beyond a reasonable doubt, while civil fraud only has to be shown by clear and convincing evidence.

Your Own Deadline to Claim a Refund

Statutes of limitation cut both ways. You also have a deadline to claim money the IRS owes you. The Refund Statute Expiration Date is the later of two dates: three years from when you filed the return, or two years from when you paid the tax.¹⁵

File within the three-year window and the refund is limited to what you paid during the three years before you filed the claim, plus any time covered by a filing extension. File under the two-year rule and the refund is capped at what you paid in the two years before the claim. Miss both, and the overpayment is gone. The same applies to amended returns: filing Form 1040-X after the refund window has closed won’t get your money back no matter how valid the claim.¹⁵

How to Check Your Own Dates

The IRS doesn’t send you a calendar showing when each statute expires, but you can work it out. A tax account transcript shows the assessment dates, payment history, and transaction codes for each tax year. Those dates are the starting points for calculating your CSED and other deadlines.¹⁶

You can access transcripts through your IRS Individual Online Account for the current and nine prior tax years. Older records require Form 4506-T. Ordering by phone at 800-908-9946 works too, though delivery by mail takes 5 to 10 calendar days.¹⁶

Reading a transcript takes practice. When significant money is at stake, having a tax professional review the codes and dates is worth the cost. A miscalculation about when a debt expires can lead to paying thousands you no longer legally owe, or acting on a deadline that has actually been pushed back by a suspension you didn’t know about.

1
Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection
2
Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection – Section: Substantial Omission of Items
3
Internal Revenue Service. Summary of FATCA Reporting for U.S. Taxpayers
4
Office of the Law Revision Counsel. 26 USC 6502 – Collection After Assessment
5
Internal Revenue Service. What Is a Levy?
6
Internal Revenue Service. Information About Wage Levies
7
Internal Revenue Service. Time IRS Can Collect Tax
8
Office of the Law Revision Counsel. 26 USC 6503 – Suspension of Running of Period of Limitation
9
Taxpayer Advocate Service. Collection Statute Expiration Date CSED
10
Office of the Law Revision Counsel. 26 USC 6213 – Restrictions Applicable to Deficiencies, Petition to Tax Court
11
Internal Revenue Service. Publication 971, Innocent Spouse Relief
12
Internal Revenue Service. Collection Statute Expiration
13
IRS.gov. Form 872, Consent to Extend the Time to Assess Tax
14
Office of the Law Revision Counsel. 26 USC 6531 – Periods of Limitation on Criminal Prosecutions
15
Internal Revenue Service. Time You Can Claim a Credit or Refund
16
Internal Revenue Service. Transcript Types for Individuals and Ways to Order Them