Texas Legal Glossary · Personal Injury

Proximate Cause

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

Definition: Proximate cause is the legal link between a defendant’s negligence and the plaintiff’s injury. Texas law requires two parts: cause in fact, meaning the conduct was a substantial factor without which the harm would not have occurred, and foreseeability.

Also called: legal cause, causation

What proximate cause means in Texas

Proximate cause is the third element of a Texas negligence claim. It answers a simple question: whether this defendant’s carelessness actually produced this injury. The Texas Supreme Court in Doe v. Boys Clubs of Greater Dallas broke it into two parts.

The first is cause in fact. The defendant’s act or omission must have been a substantial factor in bringing about the injury, and the injury would not have happened without it. The second is foreseeability. A person of ordinary intelligence should have anticipated the danger created by the negligent act. The exact sequence of events does not need to be foreseeable, only the general kind of harm.

How it works in practice

Cause in fact is where defendants push back hardest. The court in Western Investments, Inc. v. Urena explained that conduct which merely furnishes a condition that makes the injury possible is not a cause in fact.

Insurers use the same reasoning on medical issues. If you had a prior back injury, the adjuster will argue the crash did not cause your current pain. Treating physicians and, in a lawsuit, retained experts testify to whether the collision was a substantial factor in the condition.

Why it matters in your case

A clear breach of duty is worth nothing without proof that the breach caused the harm. In a rear-end collision the connection is usually obvious. In a multi-car pileup, a slip and fall with a prior injury, or a death that follows weeks after a crash, causation becomes the whole fight. Gaps in treatment and inconsistent descriptions of symptoms in medical records are the raw material insurers use to break the causal chain.

Example

Elena is rear-ended on MoPac and treats for neck pain for six months. Records from two years earlier show she had been seen once for a stiff neck after a long flight. The defense argues the crash did not cause her injury. Her orthopedist testifies that the earlier visit involved muscle strain that resolved, and that the MRI now shows a disc herniation consistent with the force of the impact. That testimony supplies cause in fact.

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.