How to Respond to Interrogatories in a Lawsuit
A practical guide to answering written discovery questions, when objections are proper, and how to avoid answers that come back to hurt you later.
Interrogatories are written questions one party sends another during discovery, and the responses are sworn statements that can be used throughout the case, including at trial. Unlike a casual conversation, every word of an interrogatory response is a durable, citable statement made under oath. Treating them as a formality is one of the more common and costly mistakes in litigation.
Answering well requires the same discipline as drafting a pleading: read the question precisely, answer only what is actually asked, support the answer with the facts you can verify, and preserve any objection you are entitled to make. Because interrogatory answers frequently surface in later depositions and summary judgment briefing, small imprecisions compound over the life of a case.
Read each interrogatory as narrowly as it is written
Interrogatories are often drafted broadly on purpose, hoping for an expansive answer. The responding party is only obligated to answer the question actually asked, not the broader question the asking party may have intended. If a term is ambiguous, state the interpretation you are using to answer, rather than guessing at the drafter's intent.
Answering more broadly than the question requires does not earn credit for cooperation; it just creates more sworn statements that can be picked apart later.
Know which objections are available and use them precisely
An objection preserved without an accompanying answer where an answer is still owed can itself be challenged as improper. Blanket, boilerplate objections asserted to every interrogatory without explanation are increasingly disfavored and can be stricken.
- Overbroad or unduly burdensome: the question sweeps in far more than is proportional to the needs of the case.
- Vague or ambiguous: a specific term in the question is undefined or reasonably susceptible to multiple meanings.
- Calls for privileged information: the answer would require disclosing attorney-client communications or protected work product.
- Not proportional to the needs of the case: the burden or expense of answering outweighs the likely benefit given the amount in controversy and the issues at stake.
- Premature: the information sought is not yet reasonably available, such as expert opinions before expert disclosures are due.
Verify facts before you answer under oath
Interrogatory responses are typically signed under penalty of perjury by the party, not just the attorney. Before finalizing an answer, confirm the underlying facts against documents and the client's actual knowledge rather than relying on memory or assumption. An answer that later proves inaccurate, even if given in good faith, can be used to attack credibility.
Supplement responses as new information emerges
Discovery rules generally impose a continuing duty to supplement or correct a response if it turns out to be incomplete or incorrect, and if the additional information has not otherwise been made known to the other side. Track which interrogatories may need supplementation as the case develops, particularly ones asking for damages calculations, witnesses, or evidence supporting specific claims or defenses, since those answers routinely change as discovery progresses.
Coordinate interrogatory answers with the rest of the case
Interrogatory responses should be consistent with the pleadings, prior discovery responses, and anticipated deposition testimony. Inconsistencies between an interrogatory answer and later testimony are a standard cross-examination tool, so answers should be reviewed against the broader case theory before they are served, not drafted in isolation by whoever happens to have the underlying facts.
- Can a party refuse to answer an interrogatory entirely?
- Only by asserting a valid, specific objection, such as privilege or undue burden, and even then the responding party generally must answer any part of the question that is not objectionable. A party cannot simply ignore an interrogatory or answer only the parts it prefers without stating a basis for withholding the rest.
- Are interrogatory answers admissible at trial?
- Yes. Because they are sworn statements by a party, interrogatory answers can generally be used at trial, including to impeach a witness whose testimony contradicts an earlier answer.
- How long does a party have to respond to interrogatories?
- Deadlines vary by jurisdiction and by any case-specific scheduling order, but 30 days from service is a common default. Extensions are often negotiable between counsel, but a party should request one before the deadline passes rather than after.
This page is an educational explainer, not legal advice, and creates no attorney–client relationship. Juricratic is a simulation engine: every probability-like figure is a dial you set, not a calibrated prediction. Verify every rule, deadline, and figure against the authorities and orders that govern your matter.
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