Responsible Third Party in Texas: Designation, Objections, and Trial

In Texas civil lawsuits, a responsible third party is someone a defendant names on the jury’s fault question as sharing blame for the plaintiff’s injury, even though that person is not being sued in the case. The designation does not make the named person pay anything. What it does is let the jury assign a percentage of fault to someone who is not at the table, and every percentage point that lands on that absent person is a percentage point the plaintiff will not collect. Under Texas’s proportionate responsibility rules, if the plaintiff’s own share of fault ends up above 50 percent, the plaintiff recovers nothing at all.¹

How Texas Divides Fault Among Everyone Involved

Chapter 33 of the Civil Practice and Remedies Code controls how fault is split in most tort cases and in claims under the Deceptive Trade Practices-Consumer Protection Act.² The jury does not pick a single wrongdoer. It assigns a whole-number percentage to every person whose conduct is at issue, and those percentages must add up to 100.³

The 51 percent bar is the rule that gives designation its bite. If your own percentage of responsibility comes back above 50, your recovery is zero, no matter how large the damages.¹ A defendant who can push enough blame onto you and onto a designated third party may push your combined share past the threshold and end the case.

Who Can Be Named as a Responsible Third Party

The statute defines a responsible third party as any person alleged to have caused or contributed to the harm in any way, whether through negligence, a defective product, or any other conduct that violates a legal standard.⁴ The named person does not have to be a defendant, does not have to be within the court’s reach, and does not have to be someone the plaintiff could actually sue. An employer protected by workers’ compensation immunity, a company in bankruptcy, or a party who already settled with the plaintiff can all be designated.

There is one carve-out. A seller who is eligible for indemnity under Section 82.002 of the Civil Practice and Remedies Code cannot be designated.⁴

How a Defendant Files the Designation

A defendant designates a responsible third party by filing a motion for leave with the court. The motion is due no later than 60 days before trial, though a court can allow a later filing on a showing of good cause.⁵

The motion has to identify the person and describe the specific acts or failures that allegedly contributed to the injury. It must meet the pleading standards under the Texas Rules of Civil Procedure.⁵ Bare speculation is not enough. The defendant typically supports the motion with deposition testimony, expert opinions, or physical evidence connecting the named person to the harm.

A second timing rule blocks a common trap. A defendant cannot designate someone after limitations has run on the plaintiff’s claim against that person, unless the defendant had already timely disclosed that person as a potential designee under the Rules of Civil Procedure.⁵ The point is to keep defendants from waiting until the plaintiff can no longer add the third party as a defendant.

Objecting to a Designation

Once the motion is served, the plaintiff or any other party has 15 days to file an objection. If nobody objects in that window, the court is required to grant the designation.⁵ Missing the deadline is effectively consent.

A timely objection puts the motion under the court’s review. To defeat it, the objecting party has to show that the defendant did not plead enough facts to support the designation and, after being given an opportunity to replead, still fell short. The two-step structure means a shaky first motion often survives once the defendant tightens it up. Once the court signs the order granting leave, the person is a designated responsible third party for all purposes under Chapter 33, without further action from anyone.⁵

Designating an Unknown Person

There is a separate track for cases where the wrongdoer’s identity is unknown. If, within 60 days of filing its original answer, a defendant alleges that an unknown person committed a criminal act that caused the plaintiff’s loss, the court must grant the designation when three things are true: there is a reasonable probability the unknown person’s act was criminal, the defendant states every identifying characteristic known at the time, and the pleading requirements are met.⁵ The unknown person is listed as John Doe or Jane Doe until identified. A hit-and-run driver is the standard example.

How the Jury Question and the Math Work at Trial

At trial, the jury gets a question that lists every person whose conduct is at issue: each claimant, each defendant, each settling person, and each designated responsible third party. Each gets a whole-number percentage, and the total has to reach 100. The third party’s name sits on the verdict form even though they never appeared, never presented a defense, and may not know the case exists. The jury cannot be asked to assign fault to anyone unless there is sufficient evidence to support it.³

After the percentages come in, the court runs the numbers. First, if the plaintiff’s share is over 50 percent, recovery is zero.¹ If the plaintiff clears that bar, damages are reduced by the plaintiff’s own percentage, and any prior settlements are subtracted from what remains.⁶ Under the default rule, each liable defendant pays only the share of damages that matches its own percentage of fault.⁷

A concrete example shows the impact. Suppose the jury awards $200,000, puts the plaintiff at 10 percent, the defendant at 50 percent, and a designated third party at 40 percent. The plaintiff’s 10 percent knocks the recoverable damages to $180,000. The defendant then owes 50 percent of the original $200,000, or $100,000. The $80,000 tied to the responsible third party is gone. No judgment runs against that third party, and no one is on the hook to pay that portion.

When Joint and Several Liability Comes Back Into Play

There are two exceptions to the several-only default. A defendant becomes jointly and severally liable for the full recoverable damages if the jury assigns that defendant more than 50 percent of the responsibility.⁷ The plaintiff can then collect the entire judgment from that one defendant.

The second exception covers defendants who acted in concert with another person with the specific intent to do harm and whose conduct falls within a listed set of serious criminal offenses, including murder, aggravated assault, sexual assault, and aggravated kidnapping.⁷ Proving specific intent is a high bar, and this exception rarely comes up in ordinary car-crash, premises, or workplace injury cases.

What the Designation Does Not Do

Designation is not a judgment. The statute expressly provides that designating someone does not by itself impose liability on that person, and a fault finding against them in one case cannot be used against them in later litigation under res judicata or collateral estoppel.⁵ The designated person never becomes a party. They have no obligation to appear and no judgment entered against them.

Designation is also separate from ordinary third-party practice. A defendant who wants to bring someone in as an actual co-defendant for contribution or indemnity still uses the regular third-party rules.⁵ Designating a responsible third party is not the same as suing them.

What an Injured Plaintiff Can Do

The plaintiff’s main response is to sue the responsible third party directly, before limitations expires, so any fault the jury assigns them turns into an enforceable judgment rather than an empty slot on the verdict form. The clock on the plaintiff’s claim against that third party does not pause because the defendant filed a designation motion. If limitations has already run, that portion of the damages may be unrecoverable.

The 15-day objection deadline is the other pressure point. Letting it pass forces the court to grant the designation regardless of how thin the supporting facts are. A motion that looks procedural on its face can, at trial, redirect a significant share of the damages onto someone the plaintiff can never collect from.

1
State of Texas. Texas Code Civil Practice and Remedies Code 33.001 – Proportionate Responsibility
2
State of Texas. Texas Code Civil Practice and Remedies Code 33.002 – Applicability
3
State of Texas. Texas Code Civil Practice and Remedies Code 33.003 – Determination of Percentage of Responsibility
4
State of Texas. Texas Code Civil Practice and Remedies Code 33.011 – Definitions
5
State of Texas. Texas Code Civil Practice and Remedies Code 33.004 – Designation of Responsible Third Party
6
State of Texas. Texas Code Civil Practice and Remedies Code 33.012 – Amount of Recovery
7
State of Texas. Texas Code Civil Practice and Remedies Code 33.013 – Amount of Liability