---
title: "Pure Comparative Negligence | Intro to Law"
description: "Pure comparative negligence lets a plaintiff recover damages minus their share of fault, even when partly responsible, in Intro to Law and Legal Process."
canonical: "https://fiveable.me/introduction-law-legal-process/key-terms/pure-comparative-negligence"
type: "key-term"
subject: "Intro to Law and Legal Process"
unit: "Unit 5"
---

# Pure Comparative Negligence | Intro to Law

## Definition

Pure comparative negligence is a tort rule that reduces a plaintiff’s damages by their percentage of fault, but does not bar recovery. In Intro to Law and Legal Process, it shows how courts split liability in injury cases.

## What It Is

Pure comparative negligence is a tort doctrine that lets an injured plaintiff recover damages even when the plaintiff helped cause the accident. The court, judge, or jury assigns a percentage of fault to each party, and the plaintiff’s award is reduced by the plaintiff’s share.

That is what makes it different from harsher fault rules. Under pure comparative negligence, there is no cutoff that says, “you were too at fault to recover.” Even if the plaintiff is 90% or 99% responsible, the plaintiff can still collect the remaining 10% or 1% of damages from the defendant, as long as the defendant also shares some legal responsibility.

The math is straightforward. If total damages are $100,000 and the plaintiff is 30% at fault, the plaintiff gets $70,000. If the plaintiff is 80% at fault, the plaintiff gets $20,000. The doctrine does not erase the injury, it just matches compensation to the amount of fault the factfinder assigns.

In Intro to Law and Legal Process, this usually comes up in the section on defenses to tort liability. You are looking at how liability gets reduced, not eliminated, and how courts use fault allocation to reach a damage award. The issue is often tied to negligence claims, where both sides may have acted carelessly in different ways.

A common classroom example is a car crash with two careless drivers, or a slip-and-fall where both a business and a customer made bad choices. The plaintiff still has to prove duty, breach, causation, and damages, but pure comparative negligence changes the size of the final award by reducing it according to the plaintiff’s own negligence.

## Why It Matters

Pure comparative negligence matters because it shows how tort law splits responsibility instead of treating fault as all-or-nothing. That makes it a big part of how injury cases are argued, especially when both sides did something careless.

It also helps you read case facts more carefully. In a negligence problem, you are not just asking, “Was the defendant careless?” You are also asking how much the plaintiff’s own conduct contributed to the injury. That changes the remedy, even when liability still exists.

This term also sits inside the bigger topic of defenses to tort liability. A defendant may use comparative negligence to reduce damages, which is different from a defense that completely blocks recovery. That distinction shows up a lot in class discussion because it affects strategy, settlement, and the way a jury thinks about fairness.

If you are comparing tort doctrines, pure comparative negligence is one of the most plaintiff-friendly fault systems. It assumes that partial fault should lead to partial recovery, not total loss. That idea shows up again and again in civil procedure, case analysis, and exam hypotheticals that ask you to allocate damages.

## Connections

### Negligence

Pure comparative negligence only matters after a negligence claim is in play. You still need the basic negligence elements, like duty, breach, causation, and damages, before a court can even start dividing fault. This term changes the remedy, not the entire structure of the claim. If the defendant was not negligent at all, comparative negligence does not create liability by itself.

### [Contributory Negligence](/introduction-law-legal-process/key-terms/contributory-negligence)

This is the sharpest contrast to pure comparative negligence. Under contributory negligence, a plaintiff’s own fault can completely bar recovery, even if the plaintiff was only slightly careless. Pure comparative negligence is much less harsh because it still allows a reduced award. Law classes often compare the two to show how different states treat the same accident very differently.

### Modified Comparative Negligence

Modified comparative negligence sits between pure comparative negligence and contributory negligence. It still reduces damages by fault percentage, but it cuts off recovery once the plaintiff reaches a set level of fault, often 50% or 51%. That makes it a common comparison term when you are sorting out which rule a jurisdiction uses.

### [Assumption of Risk](/introduction-law-legal-process/key-terms/assumption-of-risk)

Assumption of risk is another tort defense, but it focuses on a plaintiff knowingly taking on a danger rather than simply being careless. In some fact patterns, both defenses may be discussed, but they work differently. Comparative negligence divides fault, while assumption of risk asks whether the plaintiff accepted the danger in the first place.

## On the AP Exam

A case-analysis question may give you an accident fact pattern and ask how damages should be divided. Your job is to identify each party’s fault, apply the percentages, and compute the reduced award. If the plaintiff’s negligence is part of the facts, do not stop at liability, explain how pure comparative negligence affects the final number.

You might also see a short answer or discussion prompt asking you to compare tort defenses. That is where you show the difference between pure comparative negligence, modified comparative negligence, and contributory negligence. The best answers use the facts, not just the labels, so tie your explanation to who acted carelessly and how that changes compensation.

## pure comparative negligence vs Contributory Negligence

These two are often mixed up because both deal with a plaintiff’s fault. The big difference is that contributory negligence can wipe out recovery completely, while pure comparative negligence still allows recovery reduced by the plaintiff’s percentage of fault. If a problem asks about partial responsibility and still-awarded damages, pure comparative negligence is the better fit.

## Key Takeaways

- Pure comparative negligence lets an injured plaintiff recover damages even when the plaintiff shares fault for the accident.
- The plaintiff’s award is reduced by the plaintiff’s percentage of fault, so the final amount matches the fault allocation.
- Unlike contributory negligence, this doctrine does not create an automatic bar to recovery.
- The rule is a defense to tort liability, so it often appears in negligence problems with shared blame.
- When you use this term in class, focus on the percentages and the final damages, not just on whether someone was careless.

## FAQs

### What is pure comparative negligence in Intro to Law and Legal Process?

It is a tort rule that reduces a plaintiff’s damages by the amount of fault assigned to the plaintiff. Even if the plaintiff is partly responsible for the injury, the plaintiff can still recover the rest from the defendant. In law class, it usually comes up when you are dividing fault in a negligence case.

### How is pure comparative negligence different from contributory negligence?

Contributory negligence can completely block recovery if the plaintiff was careless, even a little. Pure comparative negligence is more forgiving because it still allows recovery, just reduced by the plaintiff’s share of fault. That difference can completely change the outcome of a tort problem.

### How do you calculate damages under pure comparative negligence?

Start with the total damages, then subtract the plaintiff’s percentage of fault. For example, if damages are $100,000 and the plaintiff is 30% at fault, the plaintiff recovers $70,000. The same method works whether the plaintiff is slightly at fault or mostly at fault.

### When would I use pure comparative negligence in a case analysis?

Use it when the facts show both parties acted carelessly and the question asks about liability or damages. It is especially useful in car accidents, slip-and-fall cases, and other negligence problems where fault is shared. The key move is to identify the percentages and explain how they change the award.

## Related Study Guides

- [5.4 Defenses to tort liability](/introduction-law-legal-process/unit-5/defenses-tort-liability/study-guide/EmqoGrt1PNEPw5qX)

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