Key Takeaways The IRS has 10 years from the date of assessment to collect a tax debt — this is called the Collection Statute Expiration Date (CSED) After the CSED passes, the IRS can no longer legally collect the debt and must remove all liens Certain events "toll" (pause) the statute, including OIC applications, installment agreement requests, bankruptcy, and living abroad Each tax year has its own separate CSED — your 2020 and 2021 assessments have different expiration dates Understanding your CSED is essential for choosing the right resolution strategy The 10-Year Collection Statute: How It Works Under Internal Revenue Code § 6502, the IRS generally has 10 years from the date a tax is assessed to collect the liability. This 10-year period is known as the Collection Statute Expiration Date (CSED). Once the CSED passes, the tax debt is legally uncollectible — the IRS must cease all collection activity and release any federal tax liens associated with that assessment. This is one of the most powerful provisions in tax law for taxpayers with significant IRS debt. However, it's also one of the most misunderstood. The 10-year clock doesn't always run continuously — certain events pause (toll) the statute, effectively extending the IRS's collection window. When Does the 10-Year Clock Start? The CSED clock begins on the date of assessment, not the date you filed your return or the date the tax was due. Understanding when assessment occurs is critical: Self-Assessed Returns For tax returns you file yourself, the date of assessment is typically the date the IRS processes your return. For electronically filed returns, this is usually within 1-2 weeks of filing. For paper returns, processing can take several weeks. The assessment date is recorded on your IRS account transcript as the "Assessment Date" — this is the date...