Rule 33.Interrogatories to Parties.
Last amended January 1, 2015 · Last verified July 3, 2026
Full Text of Rule 33
Amendment History
Amended May 15, 1972, effective July 1, 1972
further amended July 26, 1990, effective September 1, 1990
further amended May 7, 2004, effective July 1, 2004
further amended August 29, 2014, effective January 1, 2015
Plain-English Summary
Without leave of court or a written stipulation, a party may serve written interrogatories on any other party, capped at 60 questions counting subparts as separate questions, once the case has started against the party being asked. The answering party, or an officer or agent if that party is a corporation or agency, must answer each question separately and under oath or state the grounds for objecting, and must answer to the extent the question isn't objectionable. Answers and objections are due within 30 days of service, or 45 days for a defendant's first response, though the court or a written party agreement can shorten or lengthen that window. Every ground for objecting must be stated specifically, and any ground left out of a timely objection is waived unless the court excuses it for good cause.
The questions asked can reach anything discoverable under Rule 26(b)(1), and the answers can be used at trial to the extent the rules of evidence allow; an interrogatory isn't objectionable just because answering it calls for an opinion or requires applying law to fact. When the answer can be found in business records just as easily by the party asking as by the party asked, Rule 33(d) lets the responding party point to those records instead of answering directly, so long as it identifies them in enough detail for the other side to locate and use them.
Frequently Asked Questions
How many interrogatories can a party send?
Up to 60, counting each subpart or subquestion as a separate question, though the parties can stipulate in writing to more, and the court must grant leave for additional interrogatories to the extent consistent with the discovery-proportionality principles in Rule 26(b)(2).
How long does the other side have to answer?
30 days after service generally, or 45 days for a defendant's first response, unless the court or a written agreement between the parties sets a different deadline.
Can a party answer by pointing to its business records instead of writing out an answer?
Yes, under the business-records option in Rule 33(d), when the burden of finding the answer is substantially the same for both sides and the responding party specifies the records in enough detail to locate them.