How long do I have to bring a final paycheck penalty claim in California?

The standard window is three years from the violation for the statutory waiting-time penalty itself. That window can extend to as long as four years if you pair the claim with an unfair competition claim under a separate California statute.

Even with three or four years available, it's worth acting well before that deadline approaches. Evidence documenting your work schedule and pay rate becomes considerably harder to reconstruct once your former employer changes payroll systems or providers, which happens more often than people expect over a multi-year window.