Texas Rule of Civil Procedure 197 governs interrogatories—written questions that one party in a lawsuit may require another party to answer under oath. These questions can uncover important facts, identify witnesses, establish damages, and expose weaknesses in an opposing party's claims or defenses.

If you have been served with interrogatories in a Texas lawsuit, understanding the rules governing your responses is important. Incomplete answers, improper objections, or missed deadlines can create serious problems as litigation progresses.

Although interrogatories may appear less important than depositions or courtroom testimony, they can influence the outcome of a civil lawsuit long before trial.

This article explains how Texas interrogatories work, when responses are due, how many questions may be asked, when objections are appropriate, and how written discovery can affect a lawsuit.

What Are Interrogatories in a Texas Lawsuit?

Interrogatories are written questions served by one party on another party during the discovery process.

Discovery is the procedure through which litigants obtain information relevant to their claims and defenses. In Texas civil litigation, interrogatories are governed primarily by Texas Rule of Civil Procedure 197.

Unlike requests for production, which ordinarily seek documents or other tangible materials, interrogatories seek written answers to specific questions.

For example, in a breach-of-contract lawsuit, a plaintiff might ask:

• Identify each person with knowledge of the negotiations leading to the agreement.
• State the factual basis for your contention that the contract was performed.
• Identify the payments you contend were made under the agreement.
• Explain how you calculated the damages claimed in this lawsuit.

These questions may appear straightforward. However, the answers can significantly influence depositions, settlement negotiations, motions, and trial preparation.

Importantly, interrogatories are generally directed to parties in the lawsuit, not unrelated third parties.

What Does Texas Rule of Civil Procedure 197 Require?

Rule 197 establishes procedures for serving interrogatories, responding to them, and using the resulting answers.

Under Rule 197.1, a party may serve written interrogatories on another party to inquire about matters within the permissible scope of discovery.

Rule 197.2 generally requires interrogatories to be answered separately and fully in writing under oath, subject to proper objections and applicable procedural requirements.

The rule also recognizes that an interrogatory may ask a party to explain a legal contention or the factual basis for that contention. These are sometimes called contention interrogatories.

For example, a defendant asserting that a contract is unenforceable may be asked to identify the factual basis for that defense.

However, Rule 197 does not authorize unlimited questioning. Interrogatories remain subject to the discovery limitations and protections contained in other Texas procedural rules.

How Long Do You Have to Answer Interrogatories in Texas?

Generally, a party has 30 days after service to respond to interrogatories in a Texas civil lawsuit.

Under Rule 197.2(a), a defendant served with interrogatories before its answer is due generally has 50 days after service to respond.

These deadlines may be affected by applicable procedural rules, agreements, or court orders.

The distinction matters because receiving interrogatories with the initial lawsuit may result in a different response deadline than receiving them later during litigation.

A party should determine the applicable deadline immediately after receiving discovery requests rather than assuming that every set of interrogatories is due in 30 days.

Missing a discovery deadline may lead to a motion to compel, additional litigation expenses, or sanctions in appropriate circumstances.

How Many Interrogatories Are Allowed in Texas?

Texas limits the number of interrogatories that may be served in many civil lawsuits.

The applicable limits depend on the discovery-control plan established under Rule 190.

Level 1 Discovery

Level 1 discovery generally permits no more than 15 written interrogatories per party, subject to the exceptions established by Rule 190.2.

Certain interrogatories seeking only the identification or location of persons with knowledge of relevant facts, or the identification of legal theories and factual bases for claims or defenses, are excluded from the numerical limit.

Level 2 Discovery

Level 2 discovery generally permits 25 written interrogatories per party under Rule 190.3, subject to specified exceptions.

The applicable rule also addresses discrete subparts, which may count toward the numerical limit.

Level 3 Discovery

In Level 3 cases, the court establishes a discovery-control plan by order. The permissible number of interrogatories may therefore depend on the court's particular discovery order.

Why do numerical limits matter?

Because litigants cannot necessarily ask an unlimited number of questions, carefully drafted interrogatories are more useful than repetitive or unfocused requests.

A well-designed set of interrogatories may reveal the most important factual disputes while conserving the questions available under the applicable discovery plan.

Do Interrogatory Answers Have to Be Verified?

Generally, yes.

Rule 197.2 requires interrogatory answers to be made under oath, although the rule distinguishes between answers provided by a party and certain answers involving legal contentions or other matters.

The verification requirement is significant because the responding party is not merely making an informal statement through an attorney.

A verified interrogatory answer may later be compared with deposition testimony, documents, and trial testimony.

For example, suppose a defendant states in a verified response that no payments were received under a contract.

If bank records later demonstrate that payments were received, the inconsistency may become important during depositions, settlement discussions, or trial.

However, verification does not automatically make every interrogatory response conclusive or admissible for every purpose. Evidentiary use remains subject to the applicable procedural and evidentiary rules.

Can You Object to Interrogatories in Texas?

Yes. A party is not required to answer every interrogatory exactly as written when a legally valid objection applies.

Texas Rules of Civil Procedure 193 and 197 govern discovery responses and objections.

Common grounds for objection may include:

• Attorney-client privilege: A question seeks protected communications between an attorney and client.
• Attorney work product: A request improperly seeks protected litigation preparation materials.
• Overbreadth: A question extends beyond the permissible scope of discovery.
• Undue burden: A request imposes an unreasonable burden under the circumstances.
• Lack of relevance or proportionality: The requested information falls outside the appropriate scope of discovery.
• Vagueness or ambiguity: A question is insufficiently clear to permit a meaningful response.

Objections should be supported by a legitimate legal basis and should comply with the requirements of Rule 193.2.

An objection to part of an interrogatory does not necessarily excuse responding to the remainder.

For example, a question seeking information about every transaction a company conducted over 20 years may be excessively broad in a dispute concerning a single contract.

A narrower question concerning transactions related to the disputed agreement may nevertheless be appropriate.

The goal is not to refuse discovery reflexively, but to distinguish permissible requests from those that exceed the rules.

Can Interrogatories Ask About Legal Theories and Defenses?

Yes.

Texas Rule 197 permits interrogatories concerning legal contentions and the factual bases for claims and defenses.

This makes interrogatories particularly useful in commercial litigation.

For example, a plaintiff suing for breach of contract may ask a defendant to identify the facts supporting an affirmative defense of payment, waiver, or prior material breach.

Likewise, a defendant may seek information about the plaintiff's calculation of damages.

These questions can help clarify what the opposing party actually intends to prove.

However, interrogatories cannot automatically be used to require disclosure of privileged attorney-client communications or protected work product.

How Interrogatories Can Affect the Outcome of a Texas Lawsuit

Interrogatories are not simply administrative paperwork. They can influence litigation in several important ways.

1. Identifying Important Witnesses

Interrogatories may identify people with knowledge of relevant events.

In a real estate dispute, for example, written discovery may reveal a property manager, contractor, or former employee who possesses important information about the disputed transaction.

2. Clarifying Damages

In commercial litigation, damages are frequently disputed.

Interrogatories may require a party to explain the basis for its damages calculation, identify relevant transactions, or describe the financial losses allegedly caused by another party's conduct.

This information may help determine whether the claimed damages are supported by evidence.

3. Exposing Inconsistent Positions

A party's interrogatory responses can be compared with other discovery materials.

If a litigant provides an answer that conflicts with emails, financial records, or deposition testimony, opposing counsel may use that inconsistency to challenge credibility.

4. Narrowing the Issues Before Trial

Interrogatories can help identify which facts are genuinely disputed.

When the parties understand the opposing claims and defenses, they may be better positioned to evaluate settlement or prepare dispositive motions.

5. Preparing for Depositions

Written answers often provide a roadmap for later oral questioning.

A lawyer may use interrogatory responses to determine which witnesses to depose and what questions to ask.

This can make depositions more focused and productive.

Can You Change an Interrogatory Answer After Submitting It?

Yes, and sometimes supplementation is required.

Under Texas Rule of Civil Procedure 193.5, a party generally must amend or supplement a discovery response when the party learns that the response was incomplete or incorrect when made, or that a previously correct response has become incomplete or incorrect, subject to the rule's qualifications.

Supplementation generally must be made reasonably promptly after the need becomes apparent.

This is particularly important when new documents, witnesses, or facts emerge during litigation.

For example, a party might initially identify three people with knowledge of a disputed transaction. If the party later discovers another relevant witness, supplementation may be necessary.

Failure to supplement properly can create significant evidentiary problems, including possible exclusion under Rule 193.6.

What Happens If You Do Not Answer Interrogatories?

Failing to respond to properly served interrogatories may expose a party to discovery enforcement proceedings.

Depending on the circumstances, the opposing party may seek a court order compelling responses under Rule 215.

If discovery obligations are violated, the court may impose appropriate sanctions under the applicable rules.

Potential consequences can include monetary sanctions, orders compelling compliance, and other remedies authorized by the Texas Rules of Civil Procedure.

More severe sanctions require careful consideration of the circumstances and applicable legal standards.

A party should not assume that ignoring interrogatories is harmless merely because no hearing has been scheduled.

Common Mistakes When Answering Texas Interrogatories

Several mistakes can make written discovery unnecessarily damaging.

Missing the response deadline. Parties sometimes underestimate how much time is needed to gather records, consult relevant personnel, and prepare accurate answers.

Providing incomplete answers. A response that omits material information may lead to further discovery disputes or create credibility problems.

Using unsupported boilerplate objections. General objections that do not meaningfully identify a legal basis may be ineffective.

Failing to verify responses when required.Verification is a substantive procedural requirement, not merely a formality.

Failing to supplement. Information can change as litigation progresses, and previously accurate answers may require updating.

Answering without reviewing relevant documents. A party who responds from memory without consulting available records risks creating avoidable inconsistencies.

Each of these problems may become more difficult to correct as the lawsuit advances.

Frequently Asked Questions About Texas Interrogatories

Are interrogatories the same as depositions?

No. Interrogatories are written questions answered in writing, while depositions generally involve oral testimony under oath. Both are discovery tools, but they operate under different procedural requirements.

Can interrogatories be sent to someone who is not a party?

Generally, Rule 197 interrogatories are directed to parties in the lawsuit. Information from nonparties may be obtained through other authorized procedures, including Rule 205 discovery.

Can an attorney answer interrogatories for a client?

An attorney may assist in preparing responses and may sign certain portions of discovery responses as permitted by the rules. However, answers requiring verification generally must be verified by the appropriate responding person.

Can interrogatory answers be used at trial?

Potentially. Rule 197.3 addresses the use of interrogatory answers, subject to the rules of evidence and other applicable limitations. The admissibility and effect of a particular answer depend on the circumstances.

Do interrogatories have to be filed with the court?

Ordinarily, discovery requests and responses are served between the parties rather than routinely filed with the court. Rule 191.4 governs the filing of discovery materials and applicable exceptions.

What should you do after receiving interrogatories?

Identify the applicable deadline, preserve relevant records, review the questions carefully, gather responsive information, and consult your attorney about appropriate answers and objections.

Why Texas Rule 197 Matters in Civil Litigation

Texas Rule of Civil Procedure 197 gives litigants a structured method for obtaining important information before trial.

In business disputes, contract lawsuits, real estate litigation, and other civil cases, properly drafted interrogatories can identify witnesses, clarify factual disagreements, reveal the basis for claimed damages, and help attorneys evaluate the strengths and weaknesses of a case.

Conversely, careless responses may create inconsistencies or discovery disputes that complicate a party's litigation strategy.

The most effective approach is to treat interrogatories as an important part of case preparation rather than a routine paperwork exercise.

An attorney familiar with Texas civil discovery can help ensure that interrogatories are appropriately drafted, answered, objected to, and supplemented.

Disclaimer: This article is provided for general informational purposes only and does not constitute legal advice. Texas discovery procedures depend on the applicable rules, court orders, and circumstances of the individual case. Consult a qualified Texas attorney regarding specific legal questions.

At David C. Barsalou, Attorney at Law, PLLC, we help clients navigate business, family, tax, estate planning, and real estate matters ranging from document drafting to litigation with clarity and confidence. If you’d like guidance on your situation, schedule a consultation today. Call us at (713) 397-4678, email barsalou.law@gmail.com, or reach us through our Contact Page. We’re here to help you take the next step.