The IRS generally has ten years to collect back taxes, measured from the date it formally assessed the liability, not the date the return was filed or the tax was due. That deadline is set by Internal Revenue Code § 6502 and is called the Collection Statute Expiration Date, or CSED.1Office of the Law Revision Counsel. 26 USC 6502 – Collection After Assessment When the ten years are up, the IRS loses its authority to levy, garnish, or sue for the balance. Several events can pause the clock and push the date out, and in a few situations there is no time limit at all.
When Your Ten-Year Clock Started
The countdown begins on the assessment date. Assessment is the moment the IRS records your liability in its own system, which for most people happens shortly after a return is processed. If an audit later determines you owe more, that additional amount is assessed separately and gets its own ten-year clock. A single taxpayer with several years of debt, or with adjustments layered on top, can have several CSEDs running at once.2Internal Revenue Service. 5.1.19 Collection Statute Expiration
The ten-year rule applies to all federal taxes the IRS collects, including income, employment, and excise taxes.
To find your assessment date, request an account transcript from the IRS. You can pull one through the “Get Transcript” tool at irs.gov, by phone, or by mailing Form 4506-T. On the transcript, Transaction Code 150 marks the original assessment for that tax year and sets the original CSED.2Internal Revenue Service. 5.1.19 Collection Statute Expiration Later adjustments show up under other codes, each with its own ten-year window. The IRS does not print the CSED itself on the transcript. Calculating it means starting from the assessment date and adding whatever tolling periods apply to your account, which is why complicated histories are often worth a tax professional’s review.
What Pauses or Extends the Ten Years
Certain events suspend, or “toll,” the ten-year clock. While the clock is paused, time does not count against the IRS; when the event ends, the remaining months pick up where they left off and the expiration date moves further out.
Bankruptcy
A bankruptcy filing pauses collection for the entire period the IRS is legally barred from collecting (typically the automatic stay), plus another six months after that bar lifts.3Office of the Law Revision Counsel. 26 USC 6503 – Suspension of Running of Period of Limitation Even a brief bankruptcy adds meaningful time because of that six-month tail.
Offer in Compromise
Submitting an Offer in Compromise pauses the clock from the date the IRS accepts the offer for processing until it is accepted, rejected, returned, or withdrawn. A rejection extends the suspension for another 30 days, and if you appeal within that window, the pause continues through the appeal.4Internal Revenue Service. Topic No. 204, Offers in Compromise Every month the offer sits pending is a month added to your CSED, which matters if acceptance is a long shot.
Installment Agreement Requests
Requesting an installment agreement suspends collection while the request is pending. A rejection triggers an additional 30-day suspension, and any appeal filed in that window keeps the clock paused until it is resolved. The same 30-day-plus-appeal rule applies if the IRS later terminates an approved agreement.5Taxpayer Advocate Service. TAS Tax Tip – Understanding Your CSED and the Time IRS Can Collect Taxes The IRS may not levy during those periods, and the collection statute is suspended for the same span.6Office of the Law Revision Counsel. 26 USC 6331 – Levy and Distraint
Collection Due Process Hearings
Requesting a Collection Due Process hearing after a notice of intent to levy pauses the clock from the date the IRS receives the request until the determination becomes final, including any court appeals. The statute cannot expire until at least 90 days after that final determination.7Office of the Law Revision Counsel. 26 USC 6330 – Notice and Opportunity for Hearing Before Levy
Innocent Spouse Claims
Filing for innocent spouse relief suspends the requesting spouse’s collection clock from the filing date until the earliest of a waiver being filed, the 90-day window to petition Tax Court expiring, or the Tax Court decision becoming final. The collection period is then extended another 60 days.8Taxpayer Advocate Service. Collection Statute Expiration Date CSED
Living Outside the United States
If you live outside the country continuously for six months or more, the collection clock is generally suspended for that period, and the CSED may be extended by at least six months after you return.9Internal Revenue Service. Time IRS Can Collect Tax
Combat Zone and Contingency Operations
Service in a designated combat zone or contingency operation pauses collection for the duration of the deployment, plus continuous hospitalization for injuries received during service, plus another 180 days. A spouse gets the same benefit during the deployment.10Office of the Law Revision Counsel. 26 USC 7508 – Time for Performing Certain Acts Postponed by Reason of Service in Combat Zone or Contingency Operation The hospitalization period and 180-day tail do not extend the § 6502 collection statute specifically, though the deployment period itself still pauses collection.11Office of the Law Revision Counsel. 26 USC 7508 – Time for Performing Certain Acts Postponed by Reason of Service in Combat Zone or Contingency Operation
Voluntary Waiver on a Partial Payment Plan
The IRS can ask you to voluntarily extend the collection period, but only in connection with a Partial Payment Installment Agreement, where the scheduled payments will not cover the full debt before the CSED. The extension is signed on Form 900 and can add up to five years, plus one more year for administrative actions, for a maximum of six years. Signing is voluntary; the IRS cannot force it. Refusing when asked, however, may cause the IRS to reject the installment agreement. The waiver can only be signed when the agreement is first set up, not during a later review, unless a brand-new agreement is being executed.12Internal Revenue Service. Partial Payment Installment Agreements and the Collection Statute Expiration Date
What Does Not Pause the Clock
Not every taxpayer action or IRS status change stops the ten years. Being placed in Currently Not Collectible status, where the IRS temporarily halts active collection because you cannot afford to pay, does not suspend the CSED. The clock keeps running the whole time your account sits there, which can work in your favor if your financial situation does not improve. Filing Form 911 with the Taxpayer Advocate Service also does not pause any collection deadlines.13Internal Revenue Service. Form 911 – Request for Taxpayer Advocate Service Assistance
When There Is No Time Limit
The ten-year window only opens after an assessment, and an assessment only happens after a return is filed. If you never filed a return, there is no assessment, no CSED, and no expiration. The IRS can pursue those taxes forever.14Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection
The same open-ended timeframe applies to a fraudulent return filed with the intent to evade tax, or to a willful attempt to defeat or evade tax. In both situations the IRS can assess and collect at any time, with no statute of limitations.15Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection Once the IRS actually records an assessment, whether through your own late-filed return or otherwise, the ten-year collection clock starts from that assessment date.16Internal Revenue Service. Time IRS Can Assess Tax
What Happens When the Ten Years Run Out
Once the CSED arrives, the IRS loses its legal authority to collect the remaining balance. Active wage garnishments and bank levies must stop, and the IRS cannot file new ones. The debt becomes legally unenforceable.
Federal law requires the IRS to release any federal tax lien within 30 days after the liability becomes legally unenforceable. The release is documented by a Certificate of Release of Federal Tax Lien filed in the same recording office as the original lien, and property that was subject to the lien is freed from the government’s interest at that point.17Office of the Law Revision Counsel. 26 USC 6325 – Release of Lien or Discharge of Property
If you sent money to the IRS after the CSED had already passed, you may be able to get it back, but only if you file the refund claim before the Refund Statute Expiration Date. The IRS sometimes sends a letter when it spots a payment made after the collection period ended.9Internal Revenue Service. Time IRS Can Collect Tax Do not count on the IRS catching it. If you think you paid past the deadline, contact the IRS or a tax professional right away.
State Tax Debts Are Separate
The ten-year federal rule does not govern state tax debts. Each state sets its own collection period, and they vary widely, from as few as six years to as many as twenty, with many states allowing indefinite collection when no return was filed. State deadlines can also be paused by bankruptcy filings and payment plans, on rules similar to the federal ones. If you owe both, check your state’s rules on their own; a state debt can outlast the federal one or expire before it.