In California state civil cases, the discovery cutoff falls 30 days before the date initially set for trial, and any discovery motion must actually be heard no later than 15 days before that same date.1California Legislative Information. California Code CCP 2024.020 The word “initially” does a lot of work in that sentence. If the court later continues the trial, the cutoff still traces back to the original trial date unless a party takes affirmative steps to reopen discovery.
The Core Deadlines
Every party has the right to complete discovery on or before the 30th day before the date initially set for trial. Every discovery motion, including a motion to compel or a motion for a protective order, must be heard by the 15th day before that date.1California Legislative Information. California Code CCP 2024.020 “Heard” is not “filed.” The judge has to actually take up the motion by that date, which means it needs to be on calendar well before then.
Written discovery requires working backward. The opposing party gets 30 days to respond to interrogatories, requests for admission, and document demands. Serving by mail within California adds five calendar days.2California Legislative Information. California Code CCP 1013 In practice, written discovery served by mail needs to go out at least 65 days before trial so the response arrives before the cutoff, with time left to file a motion to compel if the answers are inadequate.3California Courts | Self Help Guide. Request Discovery From a Party in Your Case
Expert Witness Discovery Runs on a Different Clock
Expert discovery has its own tighter schedule. When a party serves a written demand to exchange expert information, the exchange date is set at 50 days before the initial trial date or 20 days after service of the demand, whichever falls closer to trial.4California Legislative Information. California Code CCP 2034.230 Expert-related discovery must be completed by the 15th day before trial, and motions concerning expert discovery must be heard by the 10th day before trial.5California Legislative Information. California Code CCP 2024.030
The stakes here are high. If a party unreasonably fails to list an expert, submit an expert declaration, produce the expert’s reports, or make the expert available for deposition, the court must exclude that expert’s testimony when the opposing party objects and has complied with the exchange requirements.6California Legislative Information. California Code CCP 2034.300 In personal injury or professional malpractice matters where expert testimony is required to prove liability, losing that testimony can end the case.
A party that missed the expert exchange deadline can move for permission to submit expert information late. The motion must be filed early enough that any resulting expert depositions can still be completed before the overall discovery cutoff, though a court may allow a later motion under exceptional circumstances.7California Legislative Information. California Code CCP 2034.710
A Trial Continuance Does Not Reopen Discovery
This is where litigants get burned. When a court continues the trial, discovery does not automatically reopen.1California Legislative Information. California Code CCP 2024.020 The cutoff stays anchored to the original trial date. A party who assumed a new trial date would generate a fresh 30-day cutoff may discover that discovery closed months earlier.
To move the cutoff after a continuance, you either file a motion under CCP 2024.050 or reach a written agreement with all affected parties under CCP 2024.060. Waiting until the eve of the new trial date to notice the problem usually leaves no room to fix it.
How to Extend or Reopen Discovery
Motion to the Court
A motion under CCP 2024.050 asks for permission to complete discovery closer to trial or to reopen it after a new trial date is set. It must include a meet-and-confer declaration showing a good-faith attempt to resolve the dispute informally.8California Legislative Information. California Code CCP 2016.040 The court weighs several factors:9California Legislative Information. California Code CCP 2024.050
- Why the additional discovery is needed and what it will uncover.
- Whether the requesting party pursued discovery diligently during the original window.
- Whether reopening would push the trial or unfairly burden the other side.
- How much time has elapsed between the original and current trial dates.
Diligence carries real weight. A party who sat on interrogatories for months and then asked for more time after the cutoff will struggle to show good cause. New evidence or a witness who suddenly becomes unavailable is a more sympathetic story. The losing side on one of these motions faces mandatory monetary sanctions unless the court finds substantial justification.9California Legislative Information. California Code CCP 2024.050
Written Agreement Between the Parties
The parties can agree to extend or reopen discovery without filing a motion, as long as every affected party consents. The agreement can be informal but must be confirmed in writing and specify the new deadline.10California Legislative Information. California Code CCP 2024.060 One limitation matters: the parties cannot force the court to continue the trial. If they reopen discovery but the new deadline runs past the trial date, the court is not obligated to postpone anything.
The 45-Day Trap on Motions to Compel
Separate from the trial-anchored cutoff, an independent deadline governs motions to compel. When you receive an inadequate response to interrogatories or a document demand, you have exactly 45 days from service of that response to file a motion to compel further answers. Miss it and you waive the right to compel entirely.11California Legislative Information. California Code CCP 2030.300 The same 45-day rule applies to motions to compel further responses to document demands.12California Legislative Information. California Code CCP 2031.310
The parties can stipulate in writing to a later date, but absent that agreement, 45 days is a hard wall. Every motion to compel also needs a meet-and-confer declaration under CCP 2016.040 showing you tried to resolve the dispute informally first.11California Legislative Information. California Code CCP 2030.300 Skipping that step is a common reason motions get denied.
The two deadlines interact in ways that are easy to miscalculate. Serve written discovery late in the discovery period, get evasive responses, and the 45-day window may run past the overall cutoff. At that point you would need both a timely motion to compel and permission to have it heard after the cutoff, stacking complexity on an already tight schedule.
What Happens When Deadlines Are Missed
California courts have a graduated sanctions toolkit. The most common consequence is a monetary order requiring the offending party or attorney to pay the other side’s reasonable expenses, including attorney fees, caused by the misuse. Where the statute authorizes monetary sanctions, the court must impose them unless the sanctioned party acted with substantial justification or sanctions would be unjust.13California Legislative Information. California Code CCP 2023.030 That “shall” language means it is not discretionary in most cases.
When money is not enough, courts can impose issue sanctions treating certain facts as established, evidence sanctions barring the offending party from introducing designated evidence, or terminating sanctions that strike pleadings, dismiss claims, or enter default judgment.13California Legislative Information. California Code CCP 2023.030 Terminating sanctions are generally reserved for parties who repeatedly ignore court orders. A single late response will not end a case; a pattern of obstruction can.
Sanctions cut both ways. The statute defines misuse of the discovery process broadly to include failing to respond, making evasive responses, asserting unmeritorious objections without substantial justification, disobeying a court order, and failing to meet and confer before filing a motion.14California Legislative Information. California Code CCP 2023.010 A party filing a baseless discovery motion can be sanctioned just as readily as one stonewalling responses.
Eviction Cases Move on a Five-Day Schedule
Unlawful detainer actions run on a compressed timeline that does not resemble the standard rules. Instead of 30 days to respond to written discovery, a party has only five days to respond to interrogatories, document demands, and requests for admission.15California Courts | Self Help Guide. Respond to a Request for Discovery in a Court Case Depositions must be scheduled at least five days after service of the notice but no later than five days before trial. There is almost no margin for delay.
Federal Court Uses Scheduling Orders Instead
If your case is in a California federal district court, the framework is different. Federal courts do not use a statutory cutoff tied to the trial date. The judge issues a scheduling order under Federal Rule of Civil Procedure 16(b) setting case-specific deadlines for completing discovery, amending pleadings, and filing motions.16Legal Information Institute. Federal Rules of Civil Procedure Rule 16 – Pretrial Conferences, Scheduling, Management That order typically issues early after the parties confer under Rule 26(f).
Modifying a federal scheduling order requires “good cause,” which generally means the deadline could not reasonably be met despite the party’s diligence. Because deadlines are tailored to each case, they vary. A complex commercial case might get 12 months of discovery; a straightforward contract dispute might get four. In federal court, the deadlines come from the judge’s order, not from the Code of Civil Procedure.