Texas Legal Glossary · Personal Injury

Plaintiff

Written and reviewed by Shane M. Boasberg, founder of SMB Law, PC · Licensed in Texas since 2003 · Updated October 2026

Definition: A plaintiff is the party who files a civil lawsuit seeking relief from a court. In a Texas injury case, the plaintiff files an original petition and carries the burden of proving negligence and damages by a preponderance of the evidence.

Also called: claimant, petitioner

What plaintiff means in Texas

The plaintiff is the person or business that starts a lawsuit. In a Texas injury case, the plaintiff is the one who was hurt and is asking the court for money damages. Before suit is filed, the same person is usually called the claimant in dealings with the insurer. In Texas family cases, the equivalent term is petitioner.

Under Texas Rules of Civil Procedure 45 and 47, the plaintiff opens the case by filing an original petition, which is what most other states call a complaint. The petition names the defendant, states the facts in plain language, and identifies the relief sought.

How it works in practice

The plaintiff carries the burden of proof. On every element of a negligence claim, the plaintiff must persuade the jury by a preponderance of the evidence, which means more likely than not. That is a far lighter standard than the criminal law’s beyond a reasonable doubt, but it still falls entirely on the plaintiff’s side of the courtroom. If the evidence is in equipoise, the plaintiff loses.

The plaintiff also controls the shape of the case. The petition sets the damages range under Rule 47(c), selects the discovery level under Rule 190, chooses the county of suit under the venue statutes, and decides whether to demand a jury. A wrongful death suit may have several plaintiffs, such as a surviving spouse, children, and parents, each with a separate claim.

Why it matters in your case

Being the plaintiff means being the party who must come forward with evidence. Medical records, bills, wage documentation, photographs, and witness testimony are the plaintiff’s responsibility to gather and present. It also means being subject to the defendant’s discovery: written interrogatories, document requests, a deposition, and sometimes an independent medical examination.

Example

After a collision on Research Boulevard, Keisha’s claim against the other driver’s insurer stalls at an offer that does not cover her surgery. Her lawyer files an original petition in Travis County district court naming the driver as defendant. Keisha is now the plaintiff. She will answer interrogatories, sit for a deposition, and, if the case does not settle at mediation, testify at trial about how the crash happened and what it has cost her.

This entry explains Texas law in general terms and is not legal advice for any specific situation. Statutes and case law change; the date above reflects the last review.