The Trial Date Sets the Deadline — Everything Works Backwards
California discovery is countdown litigation. Unlike Texas, where the discovery period opens with the lawsuit and closes on its own schedule, California’s cutoff is anchored to one date: the day trial is set to begin. Miss that anchor and every calculation after it is wrong.
Thank you for reading this post, don't forget to subscribe!This guide covers the statutory cutoff, the response windows, and the worked example that shows how litigators actually calendar it.
The 30/15-Day Cutoff (CCP § 2024.020)
Code of Civil Procedure § 2024.020 is the statute that matters most. It gives every party the right, as a matter of right, to:
- Complete discovery proceedings on or before the 30th day before the date initially set for trial, and
- Have discovery motions heard on or before the 15th day before that date.
Two consequences flow from this that trip up newcomers:
- “Complete” means completed — not served, not noticed, not “substantially done.” Your deposition must be taken, your document responses must be due, by the 30-day mark.
- A trial continuance does not reopen discovery. Section 2024.020(b) is explicit: pushing the trial date does not buy you more discovery time unless the court orders it under § 2024.050 or the parties agree in writing under § 2024.060.
The 30-Day Response Windows
Within the open period, each discovery device runs on its own clock:
- Interrogatories (CCP § 2030.260): respond within 30 days after service (5 days in unlawful detainer cases).
- Requests for production (CCP § 2031.260): 30 days after service.
- Requests for admission (CCP § 2033.250): 30 days — and as in Texas, unanswered admissions are deemed admitted, which makes this the most dangerous deadline in the set.
- Depositions: no fixed response window like the written tools, but they must be completed by the 30-day cutoff — schedule backwards from it.
Parties may extend deadlines by written agreement (§ 2024.060). Verbal “sure, take another week” deals have destroyed more cases than any statute; confirm every extension in writing.
Worked Example: Calendaring a Trial Set for March 2, 2027
- Discovery cutoff: 30 days before = January 31, 2027. Everything done by this date.
- Discovery motion hearing deadline: 15 days before = February 15, 2027. Any motion to compel must be heard by then — which means filed weeks earlier under the motion’s own notice rules.
- Last safe day to serve 30-day written discovery: roughly early January 2027, so responses land before January 31. (Pad it — mail/e-service extensions and holidays shift the math.)
- Trial continued to June? Discovery does not reopen. File a § 2024.050 motion or get a written § 2024.060 agreement if you need more.
The Trap: Serving Late and Hoping
The single most common California discovery error: serving interrogatories 28 days before trial and assuming the court will forgive the math. Courts regularly exclude late discovery — and the “I didn’t know the cutoff” defense has a roughly zero percent success rate, because § 2024.020 is one of the most-cited statutes in California civil practice.
How This Compares to Texas and Federal Court
Texas closes discovery on the earlier of 30 days before trial or nine months after first depositions (see our Texas discovery deadlines guide). Federal court uses the scheduling order’s cutoff (see our federal discovery cutoff guide). California’s version is the simplest to state and the easiest to blow: one anchor date, two countdowns.
Use our California court deadline calculator to check any date, and our legal deadline calculator for general 30-day windows.
FAQs
When does discovery close in a California civil case?
Discovery must be completed on or before the 30th day before the date initially set for trial (CCP § 2024.020(a)).
When must discovery motions be heard in California?
On or before the 15th day before the trial date — meaning they must be filed well in advance of that.
Does continuing the trial date reopen discovery in California?
No. A continuance does not reopen discovery unless the court orders it (§ 2024.050) or the parties agree in writing (§ 2024.060).
How long do I have to respond to discovery requests in California?
30 days after service for interrogatories, requests for production, and requests for admission (5 days in unlawful detainer actions).
What happens if I miss the California discovery cutoff?
Late discovery is routinely excluded, and courts can impose sanctions. Unanswered requests for admission are deemed admitted.
Can the parties extend discovery deadlines in California?
Yes — by written agreement specifying the extended date (§ 2024.060). Verbal extensions are not enforceable.
General information only — not legal advice. Verify against the current California Code of Civil Procedure and consult a licensed California attorney for your case.