When most people think about a lawsuit, they focus on the claims asserted by the plaintiff. However, one of the most dangerous procedural traps in Texas litigation involves claims that a defendant fails to assert. Under Texas Rule of Civil Procedure 97, certain claims must be brought in the pending lawsuit or they may be permanently lost.
This doctrine, known as the compulsory counterclaim rule, can determine the outcome of a case before it ever reaches trial.
What Is a Counterclaim?
A counterclaim is a claim brought by a defendant against a plaintiff within the same lawsuit. Rather than filing a separate case, the defendant asserts his own cause of action in response to the plaintiff's claims.
Texas Rule of Civil Procedure 97 divides counterclaims into two categories:
- Compulsory counterclaims; and
- Permissive counterclaims.
The distinction is critically important because a compulsory counterclaim generally cannot be saved for later.
The Text of Rule 97(a)
Texas Rule of Civil Procedure 97(a) provides:
"A pleading shall state as a counterclaim any claim within the jurisdiction of the court, not the subject of a pending action, which at the time of filing the pleading the pleader has against any opposing party, if it arises out of the transaction or occurrence that is the subject matter of the opposing party's claim and does not require for its adjudication the presence of third parties of whom the court cannot acquire jurisdiction."
The rule uses mandatory language. A party "shall" assert qualifying claims.
Why the Rule Exists
The purpose of Rule 97(a) is judicial efficiency.
Texas courts generally prefer that disputes arising from the same transaction be resolved in a single lawsuit rather than through multiple proceedings. This approach reduces inconsistent judgments, conserves judicial resources, and decreases litigation costs.
If two parties are already fighting over the same transaction, the court wants all related claims before it at the same time.
The Four General Requirements
Although Texas courts have developed detailed tests, a claim is generally compulsory when:
1. The Claim Exists When the Answer Is Filed
The defendant must possess the claim at the time the responsive pleading is filed.
Claims that arise later may not be compulsory.
2. The Claim Arises from the Same Transaction or Occurrence
This is often the most heavily litigated element.
Texas courts interpret "transaction or occurrence" broadly. Claims involving the same contract, construction project, business relationship, real estate transaction, or series of events frequently satisfy this requirement.
3. The Court Has Jurisdiction
The claim must be capable of being heard by the court where the lawsuit is pending.
4. No Separate Pending Action Exists
If the claim is already the subject of another pending lawsuit, Rule 97(a) generally does not require its assertion.
The Consequence of Failing to Assert a Compulsory Counterclaim
The penalty can be severe.
A party who fails to assert a compulsory counterclaim may later find the claim barred by res judicata.
In practical terms, this means the party may permanently lose the right to pursue the claim in a separate lawsuit.
The Texas Supreme Court has repeatedly recognized that compulsory counterclaims are intended to prevent parties from splitting disputes into multiple cases.
Common Examples
Contract Litigation
Suppose Company A sues Company B for unpaid invoices.
If Company B believes Company A breached the same contract, those breach claims may constitute compulsory counterclaims.
Waiting until after judgment to file a separate lawsuit may be fatal.
Real Estate Disputes
A seller sues a buyer concerning a failed real estate transaction.
If the buyer possesses claims arising from the same transaction, such as fraud or breach of contract, those claims may need to be asserted immediately.
Construction Litigation
Construction cases often generate numerous claims involving the same project.
Failure to evaluate compulsory counterclaim issues early can create malpractice exposure for attorneys and substantial losses for clients.
The Relationship Between Rule 97 and Res Judicata
The compulsory counterclaim rule works hand-in-hand with the doctrine of res judicata.
Res judicata prevents the relitigation of claims that were or could have been litigated in a prior action.
A defendant who fails to assert a compulsory counterclaim may discover that a later lawsuit is dismissed because the claim should have been brought in the original proceeding.
Strategic Considerations
Attorneys should evaluate Rule 97 issues immediately upon receiving a new lawsuit.
Questions to ask include:
- Does the client possess claims against the plaintiff?
- Do those claims arise from the same transaction or occurrence?
- Does the court have jurisdiction over those claims?
- Would failure to assert them risk a future res judicata defense?
The answers often shape the entire litigation strategy.
Final Thoughts
Texas Rule of Civil Procedure 97 is one of the most important procedural rules that non-lawyers rarely hear about. While plaintiffs focus on proving their claims, defendants must simultaneously consider whether they possess claims that must be asserted immediately.
Failure to recognize a compulsory counterclaim can result in the permanent loss of valuable legal rights. For that reason, parties served with a lawsuit should seek legal counsel promptly and conduct a comprehensive evaluation of all potential claims arising from the dispute before filing an answer.
The lawsuit you receive may not merely require a defense—it may be your only opportunity to bring your own claims.
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.
