How is the 10-year period for DUI convictions measured?

In California, the 10-year period for DUI convictions is measured from the date of the offense, not the date of conviction.

For example, if you were arrested for a DUI on September 1, 2008, but your case was resolved in court on January 1, 2009, the 10-year lookback period still begins on September 1, 2008. If you are arrested for another DUI within 10 years of that offense date, the new charge may be treated as a repeat DUI and subject to enhanced penalties.

It is important to understand that while the DUI lookback period is 10 years, DUI convictions do not disappear after that time. DUI convictions can remain on your criminal record permanently and may still be used by prosecutors to argue for increased bail or harsher sentencing.

For commercial driver’s license (CDL) holders, the rules are even stricter. There is no time limit on how far back the DMV or courts may look when reviewing prior DUIs or DUI-related license suspensions. A prior DUI can result in CDL disqualification regardless of how old the conviction is.