How Long Does HR Have to Investigate a Complaint in California?

You reported harassment or discrimination to HR, and now you're watching the calendar. A week passes. Two. "We're looking into it." Here is the honest answer to how long they have: California law sets no fixed number of days for a workplace investigation - and that cuts both ways. There is no statute HR can point to saying they have 90 days, and there is no free pass for letting your complaint age in a drawer.

The Real Legal Standard: Prompt, Thorough, Fair

What FEHA requires is that employers take reasonable steps to prevent and promptly correct harassment and discrimination. Courts and the Civil Rights Department read that as an investigation that starts quickly, is conducted by someone impartial, gathers the obvious evidence, reaches a reasoned conclusion, and ends with effective corrective action if the complaint holds up. "Prompt" is judged by the situation: separating you from an accused harasser can be a same-week obligation, while completing interviews across three shifts may legitimately take longer.

In practice, straightforward single-incident investigations tend to run days to a few weeks; complex multi-witness investigations commonly run four to eight weeks. What is not defensible is silence - no interim protection, no updates, no interviews scheduled - while the conduct continues.

What HR Is Supposed to Be Doing in That Time

A real investigation has visible signs: they interviewed you early and took the names of your witnesses; those witnesses actually got contacted; the accused was interviewed; relevant records (messages, schedules, camera footage) were pulled before they auto-deleted; someone with authority made interim adjustments so you are not reporting to the person you accused. If none of that is happening, you are not watching a slow investigation - you are watching a paper exercise.

The Part Most Workers Don't Know

You do not have to wait for HR to finish. The internal complaint and the legal clock are separate tracks. You can file with the Civil Rights Department while HR "investigates" - you have three years, and CRD issued 16,924 immediate right-to-sue notices in employment cases in 2024 for workers who chose to go straight to court with counsel. And if the response to your complaint is a sudden schedule change, exclusion, or discipline, that is retaliation - independently unlawful, and presumed so when it lands within 90 days of your complaint.

Protect Yourself While You Wait

Put the complaint in writing if it wasn't already, and keep the send receipt. Ask - in writing - for the expected timeline and any interim measures. Log every incident that happens after you complained; the post-complaint period is where retaliation cases are born. Save copies of anything you may lose access to. And if the investigation ends with "we couldn't substantiate it" and no explanation, ask for the conclusion in writing. Employers word those letters carefully; lawyers read them the same way.

When the Delay Itself Becomes the Case

An employer who knew and did nothing effective has failed FEHA's prevention duty - the delay stops being customer service and becomes evidence. If your complaint has sat for a month with no interviews and no protection while the conduct continued, or if HR's "investigation" ended in retaliation against you, we will tell you plainly what your options are worth. What happens after you report is covered step-by-step in our guide to what happens after you report harassment to HR, and if HR already came back with nothing, read what to do when HR does nothing. Free, confidential: 1-800-371-3088.