Negligence Damages and Defenses: Comparative Fault and Assumption of Risk
Key Takeaways
- California applies PURE comparative negligence: a plaintiff's recovery is reduced by her percentage of fault but is never barred, even if she is 99% at fault (Li v. Yellow Cab).
- Contributory negligence (a complete bar) survives in only a handful of jurisdictions; most use modified comparative fault (50% or 51% bar), so always identify the jurisdiction's regime.
- Express assumption of risk (a valid waiver) bars recovery; implied/primary assumption of risk negates duty in inherently risky activities, while secondary assumption of risk is merged into comparative fault in California.
- Compensatory damages cover past and future medical expenses, lost earnings/earning capacity, and pain and suffering; the plaintiff must mitigate, and the collateral-source rule generally bars reducing damages by insurance payments.
- Punitive damages require malice, oppression, or fraud (Cal. Civ. Code § 3294) proven by clear and convincing evidence, and are constitutionally constrained by due-process limits on the ratio to compensatory damages.
Damages in Negligence
Damages are an essential element of negligence — without actual harm there is no claim (unlike some intentional torts that allow nominal damages). Compensatory damages aim to make the plaintiff whole and fall into categories:
- Past and future medical expenses (reasonable value of care made necessary by the injury);
- Lost earnings and lost future earning capacity (capacity, not merely actual wages lost);
- Pain and suffering, including emotional distress and loss of enjoyment of life;
- Property damage, measured by repair cost or diminution in value.
Two doctrines recur on the bar:
Duty to mitigate (avoidable consequences): The plaintiff cannot recover for harm she could have reasonably avoided — e.g., by seeking timely medical care. Unreasonable failure to mitigate reduces recovery.
Collateral-source rule: Payments to the plaintiff from sources independent of the tortfeasor (the plaintiff's own health insurer, sick leave) generally do not reduce the defendant's liability. The wrongdoer does not get the benefit of the plaintiff's foresight in buying insurance. (Note California has statutory modifications in the medical-malpractice context under MICRA.)
Punitive damages are available only where the defendant acted with malice, oppression, or fraud — California codifies this in Civil Code § 3294, requiring proof by clear and convincing evidence. They are constitutionally limited: under BMW v. Gore and State Farm v. Campbell, the ratio of punitive to compensatory damages must satisfy due process (single-digit ratios in most cases). Punitive damages are generally not recoverable for ordinary negligence — gross negligence or worse is required.
California's Pure Comparative Negligence
At common law, contributory negligence was a complete bar — a plaintiff even 1% at fault recovered nothing. This harsh rule survives in only a few jurisdictions (e.g., Maryland, Virginia, Alabama, D.C.). Where it applies, the last clear chance doctrine softens it, letting a negligent plaintiff recover if the defendant had the last opportunity to avoid the harm.
Most states (and the bar's frequent default) use comparative negligence, which apportions damages by fault. Two flavors:
| Regime | Rule | Effect on a 60%-at-fault plaintiff |
|---|---|---|
| Pure comparative (California) | Recovery reduced by plaintiff's % of fault, never barred | Recovers 40% of damages |
| Modified comparative (50% bar) | Barred if plaintiff is 50% or more at fault | Recovers nothing |
| Modified comparative (51% bar) | Barred if plaintiff is more than 50% at fault | Recovers nothing |
| Contributory (minority) | Any plaintiff fault is a complete bar | Recovers nothing |
California adopted PURE comparative negligence in Li v. Yellow Cab Co. (1975). A plaintiff's damages are reduced in proportion to her own fault, but she is never barred, even if she is 90% or 99% at fault. This is the single most-tested California tort distinction. On a California essay or any 'California law' question, state the Li rule explicitly: recovery diminished, never eliminated, by the plaintiff's comparative fault.
Related California rules: Li abolished the old contributory-negligence bar and folded the last clear chance doctrine and implied secondary assumption of risk into the comparative-fault calculus. Under Proposition 51 (Civ. Code § 1431.2), California makes defendants jointly liable for economic damages but severally liable (by fault share) for non-economic damages like pain and suffering.
Assumption of Risk
Assumption of risk asks whether the plaintiff voluntarily encountered a known risk. California (following Knight v. Jewett, 1992) reorganized the doctrine into three categories:
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Express assumption of risk: The plaintiff signs a written waiver or otherwise expressly agrees to relieve the defendant of a duty. A valid, clear waiver is a complete bar — but courts void waivers that are unconscionable, ambiguous, against public policy (e.g., essential services, gross negligence, common carriers), or that fail to cover the specific risk.
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Primary (implied) assumption of risk: The defendant owes no duty (or only a limited duty) because the risk is inherent in the activity itself. A spectator hit by a foul ball, or a participant injured by an ordinary risk of a contact sport, cannot recover for those inherent risks — the defendant has no duty to eliminate them, only a duty not to increase the risks beyond those inherent in the activity or to act recklessly. Because it is a no-duty rule, primary assumption of risk is a complete bar and is unaffected by comparative-fault apportionment.
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Secondary (implied) assumption of risk: The defendant breaches a duty, and the plaintiff unreasonably (or knowingly) encounters that breach. In California, secondary assumption of risk is merged into comparative fault — it is no longer a separate complete defense but is weighed as part of the plaintiff's percentage of fault under Li.
Essay tip: Sequence the analysis. First ask whether there is an enforceable express waiver (bar). If not, ask whether the risk was inherent in the activity — primary assumption of risk, no duty (bar). Only if the defendant did owe and breach a duty do you reach secondary assumption of risk, which in California simply reduces recovery under pure comparative fault. MBE trap: On the multistate (non-California) questions, secondary assumption of risk may still appear as a separate doctrine, so read whether the question signals California or general common law.
A jury finds the plaintiff 80% at fault and the defendant 20% at fault for an automobile collision, with total damages of $100,000. Under California law, how much may the plaintiff recover?
During a recreational adult soccer game, a player is injured when an opponent makes an ordinary, non-reckless slide tackle inherent in the sport. The injured player sues the opponent. Under California's Knight v. Jewett framework, what is the most likely outcome?