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Rule 33.Interrogatories to Parties

Last amended November 1, 2023 · Last verified July 8, 2026

In one sentenceRule 33 lets any party serve up to 30 written interrogatories on another party, to be answered under oath within 30 days (45 days for a defendant just served), with an option to answer by pointing to business records instead when the burden of working out the answer is the same for both sides.

Full Text of Rule 33

Text sizeJump to: (a) (b) (c)

(a) Availability; Procedures for Use. Any party may serve upon any other party written interrogatories to be answered by the party served or, if the party served is a public or private corporation or a partnership or association or governmental agency, by any officer or agent, who shall furnish such information as is available to the party. Interrogatories may, without leave of court, be served upon the plaintiff after commencement of the action and upon any other party with or after service of the summons, complaint, and notice regarding Electronic Service upon that party. Unless otherwise ordered by the court, more than one set of interrogatories may be served, but not more than a total of 30 interrogatories may be served by a party on any other party. Each distinct subpart in an interrogatory shall be deemed a separate interrogatory for the purposes of this rule. Each interrogatory shall be answered separately and fully in writing under oath, unless it is objected to, in which event the reasons for objection shall be stated in lieu of an answer. The answers are to be signed by the person making them, and the objections signed by the attorney making them. The party upon whom the interrogatories have been served shall serve a copy of the answers, and objections if any, within 30 days after the service of the interrogatories, except that a defendant may serve answers or objections within 45 days after service of the summons, complaint, and notice regarding Electronic Service upon that defendant. The court may allow a shorter or longer time. The party submitting the interrogatories may move for an order under Rule 37(a) with respect to any objection to or other failure to answer an interrogatory. A party in responding to interrogatories shall set forth each interrogatory in full immediately preceding the party’s answer or objection thereto.
(b) Scope; Use at Trial. Interrogatories may relate to any matters which can be inquired into under Rule 26(b), and the answers may be used to the extent permitted by the rules of evidence. An interrogatory otherwise proper is not necessarily objectionable merely because an answer to the interrogatory involves an opinion or contention that relates to fact or the application of law to fact, but the court may order that such an interrogatory need not be answered until after designated discovery has been completed or until a pretrial conference or other later time.
(c) Option to Produce Business Records. Where the answer to an interrogatory may be derived or ascertained from the business records, including electronically stored information, of the party upon whom the interrogatory has been served or from an examination, audit or inspection of such business records, or from a compilation, abstract or summary based thereon, and the burden of deriving or ascertaining the answer is substantially the same for the party serving the interrogatory as for the party served, it is a sufficient answer to such interrogatory to specify the records from which the answer may be derived or ascertained and to afford to the party serving the interrogatory reasonable opportunity to examine, audit or inspect such records and to make copies, compilations, abstracts or summaries.

Advisory Committee’s Notes & Reporter’s Notes

Advisory Note – November 2023

Subdivision (a) of Rule 33 is amended to include references to the notice regarding Electronic Service described in Rule 5(b).

Advisory Committee Note — July 2008

Rule 33 is amended to make clear that “business records” include “electronically stored information,” which is intended to have the same broad meaning set forth in Rule 34 (a), which permits discovery of electronically stored information regardless of the medium in which the information is stored or the method by which it is retrieved. The amendment is made with simultaneous amendments to Rules 16, 26, 34 and 37 to provide a procedure for the discovery of electronically stored information. The amendments are taken largely from the 2006 amendments to the Federal Rules of Civil Procedure, whose Advisory Committees Notes and case law may be consulted for guidance.

Advisory Committee’s Notes — May 1, 1999

Two amendments are made to Rule 33. The sentence in Rule 33(a) limiting a party to one set of interrogatories in the absence of court order has

been deleted. The amendment inserts new language making clear that a party may serve more than one set of interrogatories on another party but may not serve more than a total of 30 interrogatories. For the purposes of the rule, subparts of interrogatories are deemed to be separate interrogatories. The intent of the rule is to limit the total number of interrogatories served and to encourage simple, direct questions rather than elaborate form questions containing multiple parts. Like the limitation on depositions, the court has flexibility to permit more interrogatories in appropriate cases or to limit the number of interrogatories upon request under Rule 26(g). Thus, a court may well conclude that two defendants jointly representing a single interest may be considered one party for the purposes of the rule.

Advisory Committee’s Notes

The original Rule 33 in Maine limited the number of interrogatories to 30. The Advisory Committee believes that this arbitrary limitation has not functioned as originally anticipated. The limitation to 30 questions has not been interpreted consistently. Neither has the limitation served to relieve parties from overly-burdensome discovery. Rather, the courts have been increasingly burdened with motions disputing the actual number of interrogatories involved.

The parties may still object, based on Rule 26, should the situation require. This amendment conforms the Maine rule with the federal rule regarding the number of interrogatories permitted.

Advisory Committee’s Note — September 23, 1971

This amendment expressly requires what is already the better practice in responding to interrogatories; namely, to set forth in full each interrogatory immediately preceding the answer or objection made thereto. This has long been the requirement of Local Rule 15(a) of the United States District Court for the District of Maine. See Field, McKusick & Wroth, Maine Civil Practice § 33.5. A similar amendment is made to Rule 36(a) relating to requests for admission. The juxtaposition of the interrogatory and the answer or objection thereto is helpful not only to opposing counsel and to the court in their subsequent

Plain-English Summary

Interrogatories are written questions one party sends another, and Rule 33 sets the limits: no more than 30 per party, counting each distinct subpart of a question as its own interrogatory, unless the court orders otherwise. Each interrogatory must be answered separately and under oath, or objected to with the reasons stated, and the party responding has 30 days — 45 days if that party is a defendant just served with the summons and complaint. The scope of what can be asked tracks Rule 26(b), and while a question calling for an opinion or a legal conclusion applied to the facts is not automatically off-limits, the court can put off requiring an answer until later discovery, a pretrial conference, or some other stage of the case.

Subdivision (c) offers a shortcut when the answer sits in the responding party's own business records, including electronically stored information: instead of writing out the answer, that party can point to the specific records, so long as figuring out the answer from them would take about the same effort for either side, and give the requesting party a real chance to examine, copy, and summarize those records.

Frequently Asked Questions

How many interrogatories can one party serve on another?

No more than 30 total, with each distinct subpart counted as a separate interrogatory, unless the court orders a different number.

How long does a party have to answer interrogatories?

30 days after service, or 45 days if the responding party is a defendant who was just served with the summons and complaint, unless the court sets a different deadline.

Can a party answer an interrogatory by pointing to business records instead of writing out an answer?

Yes, if the burden of deriving the answer from those records is substantially the same for both parties, and the responding party specifies the records and gives the requesting party a reasonable chance to examine, audit, or copy them.

Source & verification. The rule text and Advisory Committee’s Notes / Reporter’s Notes are reproduced verbatim from the official Maine Rules of Civil Procedure (Me. R. Civ. P. 33), prescribed by the Supreme Judicial Court of Maine (4 M.R.S. § 8, the Rules Enabling Act). The plain-English summary is original and written by us. Last verified July 8, 2026. · Official source
Also known as: interrogatories Mainewritten interrogatories30 interrogatory limitbusiness records option discoveryROGs