How it works
Once tax is assessed, the IRS has ten years to collect it. The collection statute expiration date is the day that period ends. Events that pause the clock include a pending Offer in Compromise, bankruptcy, a Collection Due Process hearing request, an innocent spouse request, and time outside the country for six months or more; each pause extends the date. The date appears on your account transcript.
Why it matters
Collection strategy often turns on how much time is left. A partial payment agreement on a debt with two years left can resolve it for a fraction of the balance, while an Offer in Compromise on the same debt would pause the clock and might cost more.
Example
A 2015 assessment has a CSED in mid-2026. Rather than filing an offer, the taxpayer enters a partial payment installment agreement, pays 300 dollars a month for the remaining months, and the rest of the balance expires.
Related: partial payment installment agreement, IRS transcript.