California Discovery Deadlines: Response Due Dates
California Discovery Deadlines: Response Due Dates
Legal content overseen by Nathan Walter, Esq., attorney licensed in California (State Bar No. 313299).
The baseline for California discovery deadlines is 30 days to serve a response to interrogatories, requests for production or requests for admission, counted from service of the request. For electronic service made before January 1, 2027, Code of Civil Procedure (CCP) § 1010.6(a)(3)(B) adds two court days. Under Assembly Bill 540 (Stats. 2026, ch. 263), electronic service on or after that date adds none.
This guide covers response deadlines for ordinary written discovery in California superior court, not every litigation deadline. It is written for plaintiff-side teams; see discovery workflows for plaintiff firms. The federal rules are in our discovery responses: federal rules and workflow hub.
The tables and four worked examples below show how the service method, court days and holidays move the response date. The later sections cover written extensions and late responses.
California discovery deadlines at a glance
Within that scope, the guide is limited to unlimited civil cases. It does not cover depositions, subpoenas, expert discovery, limited civil cases or motion calendars. Expedited unlawful-detainer proceedings use different response periods and are outside this guide.
The ordinary 30-day response periods
Each device has its own statute, and each runs from service of the request:
| Request type | Base period | Authority |
|---|---|---|
| Interrogatories | 30 days | CCP § 2030.260(a) |
| Requests for production | 30 days | CCP § 2031.260(a) |
| Requests for admission | 30 days | CCP § 2033.250(a) |
Each statute applies unless the court has shortened or extended the time on motion. These are periods for serving the written response, not universal dates for producing documents: a demand for inspection may separately set an inspection date, and § 2031.270 treats the two separately.
For drafting, see responding to interrogatories in California, requests for production: rules and responses (a federal-first overview) and what a request for admission does. California’s own consequences for a late admissions response are covered below.
A response deadline is not the discovery cutoff
Under CCP § 2024.020(a), and except as that chapter otherwise provides, a party may as a matter of right complete discovery on or before the 30th day, and have discovery motions heard on or before the 15th day, before the date initially set for trial. A continuance or postponement of the trial date does not reopen discovery, except as provided in Section 2024.050 (§ 2024.020(b)). This guide does not calculate those cutoffs, and the response periods above are separate from them.
Which service extension applies?
The relevant method is how the request was served, not how the response will later be served. The table lists the additions to the 30-day base period.
| Method of service of the request | Addition | Authority |
|---|---|---|
| Personal service | None | Base statutes above |
| Mail, mailed from and addressed within California | 5 calendar days | § 1013(a) |
| Mail, mailed from or addressed outside California but within the United States | 10 calendar days | § 1013(a) |
| Mail to an address in the Secretary of State’s address confidentiality program | 12 calendar days | § 1013(a) |
| Mail, mailed from or addressed outside the United States | 20 calendar days | § 1013(a) |
| Express Mail or other overnight delivery | 2 court days | § 1013(c) |
| Fax, only if the parties agreed and confirmed in writing | 2 court days | § 1013(e) |
| Electronic service made before January 1, 2027 | 2 court days | § 1010.6(a)(3)(B) |
| Electronic service made on or after January 1, 2027 | None | AB 540, Stats. 2026, ch. 263 |
The mail additions are calendar days. The overnight, fax and (through 2026) electronic additions are court days, so a response to a request served electronically before 2027 is not simply due on day 32. Section 1013(a) applies “in the absence of a specific exception,” and neither it nor § 1010.6(a)(3)(B) extends the time to file a notice of intention to move for new trial, a notice of intention to move to vacate judgment under Section 663a, or a notice of appeal. CCP § 2016.050 applies Section 1013 to discovery.
The sources reviewed for this guide do not say how the additions combine when a request is served by more than one method, so the guide does not resolve that situation.
The AB 540 change to electronic service
For electronic service before January 1, 2027, § 1010.6(a)(3)(B) supplies a two-court-day extension to service-triggered statutory or rule periods, subject to its listed exclusions and specific statutory or rule exceptions. Assembly Bill 540 (Connolly), approved and chaptered September 18, 2026 (Stats. 2026, ch. 263), amends that subdivision.
Because AB 540 is a non-urgency regular-session statute and contains no different operative date for this amendment, the change takes effect January 1, 2027 under California Constitution, article IV, § 8(c)(1) and Government Code § 9600(a).
Starting January 1, 2027, AB 540 removes that language. Electronic service made on or after January 1, 2027 adds no service-method extension to the ordinary written-discovery response periods covered here.
How to count electronic service, weekends, and holidays
The count has three steps.
1. Establish the legally effective service date
For electronic service, current § 1010.6(a)(4) deems a document served electronically between 12:00 a.m. and 11:59:59 p.m. on a court day served that day, and a document served on a noncourt day served the next court day. The 2026 examples below use that rule. Mail is different: service is complete on deposit under § 1013(a), and the next-court-day rule does not apply.
Valid service comes first. A represented person who has appeared must accept electronic service of a document that may be served by mail, express mail, overnight delivery or fax, and the person serving must confirm the electronic service address for counsel before first serving electronically (§ 1010.6(b)(2)–(3)). An unrepresented party may consent to electronic service, and electronic filing is not express consent (§ 1010.6(c)(2), (c)(3)(ii)).
2. Count the base period and the correct extension
Under CCP § 12, the first day is excluded and the last day is included. Count the 30-day base in calendar days, then add the extension: calendar days for mail, court days for overnight delivery, fax and, before 2027, electronic service. For electronic service on or after January 1, 2027, day 30 is the response date, subject to step 3.
The examples treat court days as days other than weekends and the court holidays listed by the Judicial Branch. Each example puts day 30 on a court day when a court-day addition applies. This guide does not address the order of operations when day 30 itself falls on a holiday and a court-day addition also applies.
3. Check the final day and applicable exceptions
If the last day falls on a holiday, CCP § 12a(a) extends the period to the next day that is not a holiday. “Holiday” includes all day on Saturdays and the holidays specified in Section 135. The Judicial Branch 2026 court holiday list includes Veterans Day (Wednesday, November 11), Thanksgiving (Thursday, November 26), the Day After Thanksgiving (Friday, November 27) and Christmas Day (Friday, December 25).
Weekends and holidays that fall inside a calendar-day count are counted; only the last day is tested. Court-day counts skip them. The electronic-service extension applies to service-triggered statutory and rule periods and has its own exceptions; it does not add time to every date in a case. A court order or a written agreement may also change the date.
Four worked California calendar examples
These invented examples illustrate the counting method; they are not legal advice. Each assumes valid service, an unlimited civil case, no modifying order or agreement, no additional court closure and no conflict with a trial-based cutoff.
Example A: personal service ending on a holiday
An employment plaintiff is personally served with interrogatories on Monday, October 12, 2026. The count is:
- Exclude October 12. October 13–31 supplies 19 days and November 1–11 supplies 11, so day 30 is Wednesday, November 11.
- November 11 is Veterans Day, a court holiday, so § 12a moves the last day to Thursday, November 12, 2026.
- Authority: §§ 2030.260(a), 12, 12a. No service-method addition applies.
Example B: mail within California across a weekend
A personal-injury plaintiff is served with requests for admission deposited in ordinary U.S. mail on Saturday, October 10, 2026. Both the mailing location and the address are in California, and the address-confidentiality program does not apply. The count is:
- Service is complete on deposit (§ 1013(a)). The period is 30 + 5 = 35 calendar days.
- October 11–31 supplies 21 days and November 1–14 supplies 14, so day 35 is Saturday, November 14.
- Section 12a moves the last day to Monday, November 16, 2026. Veterans Day falls inside the count and is counted.
- Authority: §§ 2033.250(a), 1013(a), 12, 12a.
Example C: electronic service on a noncourt day, before 2027
Requests for production are validly transmitted by electronic service on Saturday, October 24, 2026. The count is:
- Under current § 1010.6(a)(4), service is deemed made on Monday, October 26.
- Exclude October 26. October 27–31 supplies 5 days and November 1–25 supplies 25, so day 30 is Wednesday, November 25.
- Section 1010.6(a)(3)(B) adds two court days. November 26 is Thanksgiving, November 27 is the Day After Thanksgiving, and November 28–29 is a weekend. Monday, November 30 is the first court day and Tuesday, December 1 is the second.
- The response is due Tuesday, December 1, 2026. That is the date for serving the written response, not necessarily the date for any requested production.
- Authority: §§ 2031.260(a), 1010.6(a)(3)(B), (a)(4), 12, 12a.
Example D: electronic service in 2027
Requests for admission are validly transmitted by electronic service on Tuesday, January 5, 2027, a court day. The count is:
- Exclude January 5. January 6–31 supplies 26 days and February 1–4 supplies 4, so day 30 is Thursday, February 4, 2027.
- AB 540 adds no time for electronic service made on or after January 1, 2027. February 4 is not a Saturday or a listed court holiday.
- The response is due Thursday, February 4, 2027, with no court-day addition of the kind used in Example C.
- Authority: § 2033.250(a), § 12, AB 540 (Stats. 2026, ch. 263); Judicial Branch 2027 court holiday list.
Confirm extensions in writing
Asking for more time does not extend a response date; the other side has to agree. Interrogatories (§ 2030.270), production demands (§ 2031.270) and requests for admission (§ 2033.260) each allow the parties to agree to a response date beyond the statutory one, either for the whole set or for particular requests or items. The agreement may be informal, but it must be confirmed in a writing that specifies the extended date.
The confirmation should identify the set and the items it covers. For production demands, § 2031.270 separately refers to the date for inspection, copying, testing or sampling and the time for serving a response, so the writing should say which date it extends.
Unless the agreement expressly states otherwise, it preserves the responding party’s right to respond in any manner the relevant statutes specify, including objecting. For requests for admission, the responding party must give notice of the agreement to the other parties who were served with a copy of the request (§ 2033.260(d)). Calculate trial-based cutoffs and later motion deadlines separately; this guide does not calculate them.
What happens if the response is late?
The consequences differ by device. This section summarizes the statutes in general terms and does not address any particular case.
Interrogatories and production demands
Under § 2030.290(a)–(b), a party that fails to serve a timely interrogatory response waives any objection, including one based on privilege or work-product protection, and waives the option to produce writings under Section 2030.230. The propounding party may move for an order compelling a response.
Under § 2031.300(a)–(b), a late response to a demand for inspection likewise waives any objection, including privilege and work product, and the demanding party may move to compel a response.
In both cases the court, on motion, may relieve the party from the waiver if it finds that the party has since served a response in substantial compliance with the response statutes and that the failure to respond on time resulted from mistake, inadvertence or excusable neglect. Serving late does not by itself establish relief.
Requests for admission
Under § 2033.280, a late response waives any objection to the requests. The requesting party may move for an order that the genuineness of documents and the truth of matters in the requests be deemed admitted, together with a monetary sanction. Matters are not admitted automatically on day 31; an order is required.
The court must make the order unless it finds that the responding party served, before the hearing, a proposed response in substantial compliance with Section 2033.220. The statute makes a monetary sanction mandatory against the party or attorney, or both, whose failure to serve a timely response necessitated the motion.
Build review and verification into the response calendar
The statutory date is the last date to serve. Any earlier target dates an office sets for client returns and attorney review are office practices, not statutory periods.
Check request counts without abandoning the response calendar
The count of requests and the response period are separate questions. Under § 2030.030, a party may propound 35 specially prepared interrogatories, any additional number of official form interrogatories, or both, and may not as a matter of right propound more than 35 specially prepared interrogatories except as Section 2030.070 provides.
Under § 2030.040, a party that attaches a supporting declaration under Section 2030.050 may propound a greater number of specially prepared interrogatories on specified grounds, subject to the responding party’s right to seek a protective order under Section 2030.090. There is no 35-request cap on all written discovery. Our guide to responding to interrogatories in California covers limits and drafting in detail.
Leave time for client facts, signatures, and service
Set an internal client-return date and an attorney-review buffer ahead of the legal date, so there is time for client facts, signatures and service. The party signs responses under oath unless they contain only objections, and the attorney signs any response that contains an objection (§ 2030.250, § 2031.250, § 2033.240).
Track the responses, client information, responsive documents and proof of service as separate items. For Legal Aid teams handling ordinary civil discovery, which this guide treats separately from eviction procedure, plain-language client questions help; see discovery workflows for Legal Aid teams. Briefpoint supports the drafting and client-question steps, as described next.
Prepare discovery responses with Briefpoint
Briefpoint works on the drafting side of this calendar, after the attorney has verified the service date and the response date.
Briefpoint’s discovery response drafting produces responses and objections to interrogatories, requests for production and requests for admission, with output editable in Microsoft Word. Client Bridge client collection sends clients plain-language questions through a secure link so they can answer and upload documents for attorney review. Autodoc responsive-document review finds responsive documents, adds page-level Bates citations and builds a Bates-numbered production package.
For the office calendar, reserve separate time to review the draft responses, client answers and responsive documents before service. Attorneys keep final review, verification of the due date and responsibility for service.
See how Briefpoint supports your discovery response workflow: Book a demo.
Watch the Briefpoint demo:
FAQs About California Discovery Deadlines
How long do you have to respond to discovery in California?
Ordinarily 30 days from service of the request. Interrogatories (CCP § 2030.260(a)), requests for production (§ 2031.260(a)) and requests for admission (§ 2033.250(a)) each carry a 30-day response period in California superior court, unless a court order or agreement changes it. The method used to serve the request can add time, such as five calendar days for in-state mail under § 1013(a).
How many extra days does electronic service add in California, and what changes under AB 540?
For electronic service made before January 1, 2027, two court days under CCP § 1010.6(a)(3)(B), not two calendar days. Under AB 540 (Stats. 2026, ch. 263), electronic service on or after January 1, 2027 adds no service-method extension to the ordinary written-discovery response periods covered here.
What if a California discovery deadline falls on a weekend or holiday?
The deadline moves to the next day that is not a holiday. Under CCP §§ 12 and 12a, a last day that falls on a Saturday or a holiday specified in Section 135 is extended. Weekends and holidays inside a calendar-day count are still counted, and only the final day is tested. Court-day additions skip weekends and court holidays.
Can the parties agree to extend a discovery response deadline?
Yes, if the agreement is confirmed in writing. CCP §§ 2030.270, 2031.270 and 2033.260 let the parties agree to a later response date. The agreement may be informal, but the writing must specify the extended date. For requests for admission, the responding party must also notify other parties served with the requests. A request for more time is not itself an extension.
Are requests for admission automatically admitted if you respond late in California?
No. Under CCP § 2033.280, a late response waives objections, and the requesting party may move for an order deeming the matters admitted. The court must grant that order unless the responding party served a proposed response in substantial compliance with § 2033.220 before the hearing. Monetary sanctions against the party or attorney whose failure necessitated the motion are mandatory.
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