What is the IRS Collection Statute of Limitations?

Key Takeaways  

• The IRS generally has 10 years from the date of tax assessment to collect unpaid taxes, known as the Collection Statute Expiration Date (CSED). 

• Each tax assessment has its own 10-year collection period, meaning taxpayers can have multiple CSEDs for different tax years or balances. 

• Certain events, including bankruptcy, Offers in Compromise, Collection Due Process hearings, and extended time abroad, can suspend or extend the IRS collection statute. 

• Taxpayers can review their IRS Account Transcripts to identify assessment dates and estimate their CSED, but calculating the actual expiration date requires accounting for qualifying suspensions and extensions. 

• Once the CSED expires, the IRS generally cannot pursue new levies or enforced collection actions for that specific assessment, although existing tax liens may still require formal release. 

• Currently Not Collectible (CNC) status does not erase tax liability or stop the 10-year collection clock, and the federal IRS collection statute does not apply to state back taxes. 

They say that death and taxes are the only two certainties in life. However, taxes are only collectible for so long. The IRS Collection Statute of Limitations is a critical aspect of tax law that often confuses taxpayers and professionals alike. This statute dictates the timeframe within which the IRS can collect unpaid taxes. While it offers protection to taxpayers, navigating its complexities requires a nuanced understanding. Here’s a breakdown of what the IRS Collection Statute of Limitations entails and its implications for taxpayers. 

What is the IRS Collection Statute of Limitations?  

The IRS Collection Statute of Limitations is outlined in Section 6502 of the Internal Revenue Code. It establishes the timeframe during which the IRS can pursue the collection of unpaid taxes. Generally, the statute allows the IRS ten years from the date of assessment to collect the owed taxes. 

This 10-year period is commonly referred to as the Collection Statute Expiration Date (CSED). It applies to each individual tax assessment, rather than automatically applying to an entire tax year or a taxpayer’s total outstanding balance. The IRS may have multiple collection expiration dates for different assessments on the same account. 

When Does the IRS Begin Collections? 

The IRS begins the collection process after a tax has been officially assessed and a Notice and Demand for Payment has been issued. Assessment typically occurs after a filed return is processed, an audit adjustment is finalized, or the IRS prepares a substitute return for you and assesses the tax after you do not respond to its notice of deficiency. 

The first formal bill is usually Notice CP14, which informs you of the amount owed, including penalties and interest, and demands payment. If the balance is not paid or resolved, the IRS will escalate collection efforts through a series of notices: 

• CP501 – Reminder notice that you have a balance due 

• CP503 – Second reminder notice 

• CP504 – Notice of intent to levy. This notice warns that the IRS may take your state tax refund if the balance stays unpaid. 

If the debt remains unpaid after these notices, the IRS may take stronger enforcement action. This can include filing a Notice of Federal Tax Lien, which secures the government’s legal claim against your property. It can also include sending a Final Notice of Intent to Levy and Notice of Your Right to a Hearing (usually Letter LT11 or Letter 1058). Once that notice has been issued and the time to request a hearing has passed, the IRS may levy your wages, bank accounts, or other assets. 

In short, the IRS does not immediately pursue a taxpayer. Collections begin only after assessment and proper notice, and the process typically escalates in stages if the debt is not addressed. 

How Long is the IRS Collection Statute of Limitations?  

The IRS has a 10-year statute of limitations for tax collections, beginning when the IRS first assesses your tax liabilities. In other words, once the 10 year collection period for an assessment ends, the IRS can no longer collect it. You should keep in mind that the first IRS notice you receive is not necessarily when your liabilities are assessed. Specifically, there is a Collection Statute Expiration Date (CSED), which marks the last day the IRS can collect tax debt.  After the CSED, the IRS can no longer legally collect that assessed amount, and the remaining balance is written off. 

The 10-year period does not necessarily begin on the date you filed your tax return, the tax return’s original due date, or the end of the tax year. Instead, it begins when the IRS formally records the tax assessment on its books. For example, an additional tax liability resulting from an audit generally has a different assessment date from the original balance reported on the taxpayer’s return. 

Additionally, the 10-year period applies to the tax, penalties, and interest associated with the applicable assessment. However, certain events can suspend or extend the collection period, meaning the actual CSED may fall later than the date that would be calculated by simply adding 10 years to the assessment date. 

Assessments That Start Their Own 10-Year Clock 

Each time the IRS makes a separate assessment, it generally creates its own 10-year Collection Statute Expiration Date. That means a taxpayer can have multiple CSEDs running at the same time for different balances or tax years. Common assessments that start their own 10-year clock include: 

• Original return assessment — When you file your tax return and the IRS processes it, the assessed balance due begins its own 10-year collection period. 

• Amended return assessment — If you file an amended return that increases your tax liability, the additional amount assessed starts a separate 10-year CSED from the date that new amount is assessed. 

• Substitute for Return (SFR) — If you fail to file, the IRS may prepare a Substitute for Return on your behalf. Once the tax is assessed based on the SFR, that assessment begins its own 10-year collection clock. 

• Audit assessments — If an IRS audit results in additional tax owed, the newly assessed balance starts its own 10-year period from the assessment date. 

• Civil penalties — Certain civil penalties, such as the Trust Fund Recovery Penalty, are assessed separately from the underlying tax and generally carry their own 10-year collection period. 

Because each assessment has its own timeline, it is possible for part of a tax debt to expire while another portion remains collectible. Reviewing your IRS transcripts can help determine the specific assessment dates and corresponding CSEDs for each balance. 

An additional assessment can also occur when a taxpayer files a return after the IRS has already prepared a Substitute for Return. If the taxpayer’s accepted return shows a higher tax liability than the SFR assessment, the IRS generally creates a separate assessment for the additional amount, with its own CSED. If the accepted return shows a lower liability, the IRS may reduce or reverse the original amount, but the original CSED generally remains unchanged. 

How Can You Find Your IRS Collection Statute Expiration Date? 

The IRS does not always provide a clearly labeled CSED on its notices or bills. Taxpayers can review their IRS Account Transcripts to identify assessment dates and other account transactions that may affect the collection period. 

To obtain an IRS Account Transcript, you can: 

• Sign in to your IRS Online Account and access your tax records. 

• Complete and submit Form 4506-T, Request for Transcript of Tax Return, to request an account transcript by mail. 

• Call the IRS automated transcript service at 800-908-9946. 

Once you have the transcript, review the Transactions section for assessment-related entries and transaction codes that may help establish the CSED. However, calculating the actual expiration date requires accounting for any applicable suspensions or extensions. The IRS explains that the date associated with certain transaction codes generally reflects the CSED plus time added by law. 

If you believe the IRS has calculated your CSED incorrectly, you can contact the IRS to request an explanation. Taxpayers who need additional assistance disputing an incorrect calculation may also contact the Taxpayer Advocate Service (TAS). 

Which Actions Extend a CSED?  

There are several qualifying events that can extend a CSED, including the following.   

Suspension vs. Extension 

It is important to understand the difference between a suspension of the CSED and an extension, as well as how overlapping events are treated. 

• Suspension (Tolling): A suspension temporarily pauses the 10-year collection clock. The clock stops running during the qualifying event and resumes once the event ends. The IRS adds the suspended time to the original CSED. 

• Extension: An extension adds time to the collection period when the law allows it. Examples include the extra 30 days after a rejected Offer in Compromise or the extra 90 days after a Collection Due Process determination. A taxpayer can also agree in writing to extend the period, but this is now limited to narrow situations, such as in connection with an installment agreement. 

Both suspensions and extensions delay the date when the IRS loses its legal authority to collect an assessment. However, they work differently. A suspension occurs when the IRS is temporarily prohibited from collecting, while an extension allows additional time to be added to the collection period under applicable law. 

Filing for Bankruptcy  

When an individual files for bankruptcy, the Collection Statute of Limitations is typically tolled, meaning it is paused or suspended for the duration of the bankruptcy proceedings. The IRS will pause the statute of limitations while your bankruptcy filing is pending, starting from the filing date until the court decides. The CSED will remain suspended for an additional six months.   

More specifically, the CSED is generally suspended while the IRS is barred from collecting because of the bankruptcy (the automatic stay), and for six months afterward. 

It is also important to understand that bankruptcy and the IRS collection statute are separate issues. Certain older income tax liabilities may qualify for discharge through bankruptcy if they meet specific legal requirements. However, not all tax liabilities are dischargeable, and the effect of bankruptcy on a taxpayer’s collection timeline depends on the circumstances. 

Living Abroad  

Living abroad can also have implications for the Collection Statute Expiration Date. The IRS will pause the statute of limitations while you live abroad for six consecutive months or longer. If you are outside the United States continuously for at least six months, the CSED is paused for that time. After you return, the IRS also cannot let the collection period expire until at least six months have passed. 

According to the IRS, living outside the United States continuously for at least six months generally suspends the CSED for the applicable period. The collection period also cannot end until at least six months after the taxpayer returns to the United States. This means that spending an extended period abroad does not necessarily allow a taxpayer to run out the 10-year collection clock. 

Requesting an IRS Installment Agreement  

The CSED is suspended while the IRS reviews your installment agreement request. If you withdraw the request, the IRS rejects it, or the IRS proposes to terminate an existing agreement (for example, after a default), the CSED is extended by another 30 days. If you appeal, the CSED stays suspended until the appeal is final. 

It is important to distinguish between a pending installment agreement request and an installment agreement that has already been approved. Generally, the CSED is suspended while the IRS reviews the application. If the request is withdrawn or rejected, or the IRS proposes terminating an agreement, an additional 30 days may be added to the collection period under applicable rules. If the taxpayer appeals the decision, the CSED generally remains suspended throughout the appeal. 

Once an installment agreement is active, however, the collection statute generally continues to run while the taxpayer makes the required payments. Therefore, simply making payments under an approved installment agreement does not automatically pause the 10-year collection period. 

Submitting an Offer in Compromise  

When you submit an Offer in Compromise (OIC) to the IRS, the CSED is typically tolled or suspended for the duration of the consideration period, which can last several months or even longer. Once a decision is made, the suspension ends. If your offer is rejected, your CSED will remain suspended for 30 more days.   

If the taxpayer appeals a rejected Offer in Compromise, the collection statute generally remains suspended until the appeal process concludes. This means the time spent waiting for an offer decision, along with certain additional periods, can extend how long the IRS has to collect the outstanding balance. 

Because submitting an Offer in Compromise can affect the CSED, taxpayers should understand the potential impact on their collection timeline before applying. An offer should be evaluated based on eligibility, financial circumstances, and the amount of time remaining on the applicable collection period. 

Requesting Innocent Spouse Relief  

When a taxpayer requests Innocent Spouse Relief, the CSED is typically tolled or suspended for the duration of the IRS’s consideration of the innocent spouse claim. However, the suspension will only apply to the spouse applying for relief. The CSED is suspended until the requesting spouse files a waiver or the 90 day period to petition the Tax Court ends, whichever comes first. If the requesting spouse petitions the Tax Court, the CSED stays suspended until the Court’s decision is final. In either case, the IRS adds another 60 days. 

Importantly, requesting Innocent Spouse Relief does not extend the collection statute for the other spouse. The suspension generally applies only to the individual requesting relief. 

Requesting a Collection Due Process (CDP) Hearing  

When a taxpayer requests a CDP hearing, the IRS generally suspends the CSED. The IRS will pause the statute of limitations while it reviews your request to stop a levy or remove a lien until a determination is made or until you withdraw your request. If fewer than 90 days remain on the CSED when the final decision is made, the CSED is extended so that it ends 90 days after that decision. The suspension applies only when the hearing request is made on time. Equivalency hearings do not suspend the CSED. 

The suspension generally continues while the taxpayer appeals the determination through the appropriate process.  

Military Deferment  

A military deferment can also have implications for the Collection Statute Expiration Date. Military service can pause the collection clock in two ways. For service in a designated combat zone, the CSED is suspended from the day you enter the combat zone until the day you leave, plus 180 days. For certain other military service under the Servicemembers Civil Relief Act, the CSED is suspended during the service and for an additional 270 days afterward. 

The specific rules depend on the type of qualifying military service. For example, certain military service suspends the CSED during the service period and for an additional 270 days afterwards. For qualifying combat zone service, the collection period is generally suspended during the time in the combat zone and for an additional 180 days afterward. 

Being Sued By the IRS  

While this rarely happens, the IRS can file a lawsuit to collect a tax debt or to turn it into a court judgment. If the IRS files the suit before the CSED expires, it can keep collecting until the debt or the judgment is paid or can no longer be enforced. The IRS generally treats a court judgment as collectible for up to 20 years from the date it is entered. 

What Happens if Events Overlap? 

If multiple tolling events occur at the same time, the IRS does not double-count the suspended period. Overlapping time is counted only once. For example, if a taxpayer submits an Offer in Compromise that is pending for six months, and during that same period requests a Collection Due Process hearing, the statute is suspended for six months, not twelve. If the events only partly overlap, the suspension runs from the start of the first event to the end of the last one, and the overlapping time is counted only once. The collection clock resumes after both matters are resolved, and only the total paused time is added to the CSED. 

Because multiple events can affect the same tax assessment, calculating a CSED requires reviewing the complete collection history. A taxpayer who has filed multiple Offers in Compromise, requested CDP hearings, entered bankruptcy, or spent extended periods abroad may have a substantially different expiration date than originally expected. 

What the IRS Can and Can’t Do After the CSED 

Once the Collection Statute Expiration Date passes, the IRS generally loses its legal authority to collect the expired tax debt. However, there are important limitations and exceptions to understand. 

What the IRS Can’t Do After the CSED 

• Issue new levies — The IRS cannot garnish wages, levy bank accounts, or seize assets for a tax debt after the CSED has expired. 

• File a new Notice of Federal Tax Lien — The IRS cannot file a new federal tax lien for an expired liability. 

• Pursue enforced collection actions — Once the statute expires, the IRS must cease active collection efforts on that specific assessment. 

What the IRS Can Still Do 

• Existing tax liens may remain until released — If a Notice of Federal Tax Lien was filed before the CSED expired, it does not automatically disappear on the expiration date. The IRS must issue a lien release. Under federal law, the IRS generally must issue a certificate of release within 30 days after a tax liability becomes legally unenforceable. Taxpayers should verify that the release has been processed if a previously filed lien continues to appear in public records. 

• Keep money collected before the CSED — If the IRS levied your wages, bank account, or other property before the CSED expired, it can generally keep and apply those proceeds. A levy on your future income that began before the CSED can also continue to pay the IRS. 

• Maintain records of the expired debt — Even though the IRS can no longer collect, internal account records may still reflect that the liability existed. 

Additionally, if a taxpayer makes a payment toward a tax liability after its CSED has expired, the taxpayer may be eligible to request a refund of the overpayment. However, the refund must be requested within the applicable Refund Statute Expiration Date (RSED), and other refund eligibility requirements may apply. 

Understanding what happens after the CSED helps taxpayers know when collection authority truly ends and what residual issues — such as lien releases — may still need to be addressed. 

How Long Does Currently Not Collectible (CNC) Status Last? 

Currently Not Collectible (CNC) status is an IRS designation for taxpayers who can demonstrate that paying their tax debt would cause significant financial hardship. When the IRS approves CNC status, it generally pauses active collection actions such as levies and wage garnishments. CNC does not erase the debt. Interest and penalties can keep adding up, the IRS may still file a Notice of Federal Tax Lien, and any federal tax refund you are owed will be applied to the balance. However, there are a few important things to understand: 

• There is no fixed end date for CNC status. Unlike the 10-year statute of limitations for IRS collections, CNC status itself does not automatically expire after a set period. It lasts as long as the taxpayer continues to meet the financial hardship criteria. The IRS may review a taxpayer’s financial situation periodically to verify that hardship still exists. If the IRS determines a taxpayer’s financial condition has improved, it may remove CNC status and resume collection efforts. 

• The 10-year CSED generally continues to run while in CNC. Being in Currently Not Collectible status does not stop the statute of limitations on collections from counting down toward expiration. This means that if the CSED is reached while the account remains in CNC status, the IRS can no longer legally collect that debt. 

Because CNC status does not generally suspend the CSED, it may provide temporary relief from active collection efforts while the collection statute continues to run. However, taxpayers should not assume that CNC status automatically eliminates their tax liability. The IRS can review their financial circumstances and resume collection efforts if their ability to pay improves before the CSED expires. 

A taxpayer’s eligibility for CNC status and the amount of time remaining on the CSED should be evaluated together when considering possible tax resolution options. 

Does the IRS 10-Year Collection Rule Apply to State Back Taxes? 

No. The federal IRS Collection Statute of Limitations does not determine how long state tax agencies can collect unpaid state taxes. Each state has its own tax collection laws, including separate limitation periods, exceptions, and rules for suspending or extending collection timelines. 

For example, a taxpayer’s federal tax liability may reach its CSED while a separate state tax liability remains collectible. This is why taxpayers with both federal and state tax liabilities should review each balance independently rather than assume that the federal 10-year rule applies to both. 

How Optima Tax Relief Can Help 

Navigating the IRS Collection Statute of Limitations can be complicated, especially when multiple tax assessments, collection actions, or qualifying events affect the amount of time the IRS has to collect. Optima Tax Relief can help taxpayers understand their outstanding tax liabilities, review their IRS account transcripts, and determine which collection deadlines may apply to their situation. Having a clearer picture of your CSED can help you make more informed decisions about your tax resolution options. 

Depending on your financial circumstances and eligibility, Optima Tax Relief can help you explore potential solutions, including installment agreements, Offers in Compromise, and Currently Not Collectible status. Working with experienced tax professionals can help you better understand your options, address IRS collection efforts, and develop a strategy for resolving your tax liabilities. 

Frequently Asked Questions 

What is the difference between suspending and extending the IRS collection period? 

Suspension (tolling) temporarily pauses the 10-year collection clock — the clock stops during a qualifying event and resumes where it left off once the event ends. Extension adds time to the collection period when the law allows it, such as the extra 30 days after a rejected offer or the extra 90 days after a CDP determination. 

Do overlapping tolling events stack additional time? 

No. If multiple tolling events occur simultaneously, the IRS does not double-count the overlap. Overlapping suspension periods run concurrently, and only the total paused time — not the sum of each event — is added to the CSED. 

Which assessments each start a separate 10-year CSED? 

Each of the following creates its own independent 10-year collection clock: an original return assessment, an amended return assessment that increases tax owed, a Substitute for Return (SFR) filed by the IRS, an audit assessment resulting in additional tax, and certain civil penalties such as trust fund recovery penalties. 

What happens after the CSED expires? 

Once the CSED passes, the IRS can no longer levy assets, file new tax liens, or pursue enforced collection on that debt. However, any existing federal tax lien filed before the CSED does not disappear automatically — the IRS must formally release it, typically within 30 days of the debt becoming legally unenforceable. 

If less than 90 days remain when a CDP determination becomes final, what happens? 

The CSED is automatically extended to equal 90 days from the date the final determination is issued. This ensures the IRS retains a minimum window to resume collection activity after the CDP process concludes. 

Tax Help for People Who Owe 

You might be enticed to just wait out the IRS collection statute of limitations. However, this strategy is generally not recommended since it would mean ignoring your growing tax bill and IRS notices. Unresolved tax debt can lead to liens, levies, and other collection actions that may make it harder to buy a home, get credit, or run a business. Working with the IRS will typically be your best option, but doing so alone can be tedious, intimidating, and stressful. Working with a credible and experienced tax relief company can help save time, money, and stress. 

Before deciding to wait for the collection statute to expire, taxpayers should understand how much time remains on their CSED and whether any actions could extend it. Ignoring IRS notices or collection activity can also result in serious financial consequences, including tax liens, wage garnishments, and bank levies. Optima Tax Relief is the nation’s leading tax resolution firm with over $3 billion in resolved tax liabilities.      

If You Need Tax Help, Contact Us Today for a Free Consultation.