Oklahoma: How a 1978 Case Ended Contributory Negligence

Four systems, and Oklahoma uses the more common threshold

American fault law splits into four real categories: pure comparative negligence, modified comparative negligence with a 50% bar, modified comparative negligence with a 51% bar, and pure contributory negligence. Oklahoma uses the 51% bar under 23 O.S. § 13 — the more typical of the two modified thresholds nationally.

A genuinely significant historical shift

Oklahoma wasn't always a comparative negligence state. Until a landmark 1978 Oklahoma Supreme Court decision, Laubach v. Morgan (588 P.2d 1071), the state followed pure contributory negligence — the same harsh, all-or-nothing rule still used today in just five US jurisdictions, under which any fault at all by the plaintiff completely barred recovery. The court's adoption of comparative negligence was soon codified in statute, effective July 1, 1979, representing a genuinely major shift in how fault worked in Oklahoma.

The 50/51 distinction, precisely

A claimant found exactly 50% at fault still recovers half of their damages under Oklahoma's current rule, because that fault is not of greater degree than the defendants' combined fault. A claimant found 51% at fault recovers nothing at all.

Gross negligence vs. intentional conduct

Oklahoma courts have clarified a genuinely important nuance: comparative negligence principles can still reduce a plaintiff's recovery even in a case alleging the defendant's gross negligence. But comparative negligence does not apply to a defendant's willful, wanton, or intentional conduct — a real distinction in how a plaintiff's own fault interacts with different categories of a defendant's wrongdoing.

The other three systems, for context

A smaller group of about 12 states uses the stricter 50% bar, where recovery is barred at fault merely equal to the other side's. At the more forgiving end, pure comparative negligence states like California never bar recovery for ordinary fault at all. See our guide to the other states using a 51% bar for Oklahoma's closest peer group nationally.

Pure vs. modified comparative negligence — frequently asked questions

What are the four fault systems used across US states?

Pure comparative negligence, modified comparative negligence with a 50% bar, modified comparative negligence with a 51% bar, and pure contributory negligence. Oklahoma uses the 51% bar.

Was Oklahoma always a comparative negligence state?

No. Oklahoma was a pure contributory negligence state until the Oklahoma Supreme Court's 1978 decision in Laubach v. Morgan adopted comparative negligence, codified in statute shortly after.

How does Oklahoma's 51% bar differ from a 50% bar?

A 50% bar state denies recovery once the claimant's fault equals the defendant's. Oklahoma's 51% bar only denies recovery once the claimant's fault is of a greater degree than the defendant's combined fault.

How does Oklahoma's rule differ from a pure comparative negligence state?

A pure comparative state like California never bars recovery for ordinary fault, no matter how high the percentage. Oklahoma bars recovery entirely once fault exceeds 50%.

Does comparative negligence reduce recovery for a defendant's gross negligence?

Oklahoma courts have held that comparative negligence principles can reduce a plaintiff's recovery even in cases alleging a defendant's gross negligence, though it does not apply to willful, wanton, or intentional conduct.

This page provides general guidance only and is not legal advice. Figures are based on Oklahoma statute and case law (23 O.S. § 13; Laubach v. Morgan, 588 P.2d 1071 (Okla. 1978)) and general US negligence law, verified per our methodology. Confirm how these rules apply to a specific claim with a licensed Oklahoma attorney before acting.