
Author: John Mattiacci | Owner Mattiacci Law
Published February 24, 2025

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ToggleIn personal injury cases, understanding how fault is determined can impact the amount of compensation you receive. If you’re asking, “What is comparative negligence in Pennsylvania law?” here’s the quick answer:
Comparative negligence in Pennsylvania allows an injured person to recover compensation even if they share some responsibility for the accident. However, under the state’s modified comparative negligence rule, plaintiffs can only recover damages if they are 50% or less at fault. Compensation is reduced by the percentage of fault assigned to the injured party.
Let’s explore how Pennsylvania’s comparative negligence rule works, how it affects compensation, and what it means for personal injury claims.
Understanding Comparative Negligence in Pennsylvania
Pennsylvania follows a modified comparative negligence system, which means plaintiffs can recover damages as long as their share of fault does not exceed 50%. This rule ensures that compensation is distributed fairly among all parties involved in an accident, based on their level of responsibility.
Concept | Details |
---|---|
Modified Comparative Negligence | Allows recovery of damages only if the plaintiff is 50% or less at fault for the accident. |
Fault Percentage | The percentage of fault assigned to each party determines the reduction in compensation. |
Application in Pennsylvania | If an injured person is more than 50% at fault, they cannot recover any compensation. |
For example, if you’re found to be 30% at fault in an accident and are awarded $100,000, your compensation would be reduced by 30%, meaning you would receive $70,000. However, if you are 51% at fault, you would not be eligible to recover damages.
What is the Definition of Comparative Negligence?
Comparative negligence is a legal principle used to determine liability and compensation in cases where multiple parties share fault. This doctrine allows the court to allocate fault and damages based on the degree to which each party is responsible for the harm.
By assessing each party’s contribution to the accident, comparative negligence ensures a fair distribution of financial responsibility. This principle is crucial in determining liability and compensation when multiple parties contribute to an accident or incident causing harm.

Key Points About Pennsylvania’s Comparative Negligence Rule
- Partial Fault Doesn’t Prevent Compensation
Pennsylvania’s comparative negligence allows you to recover damages as long as your share of fault does not exceed 50%. This rule helps ensure fair compensation in cases where fault is shared. - Compensation Is Reduced by Your Percentage of Fault
The court or insurance company will determine fault for each party involved, and your compensation will be adjusted accordingly. For instance, if you’re 40% responsible, you’ll receive 60% of the total damages awarded. - Applicable to Multiple Types of Accidents
Comparative negligence applies to a variety of personal injury cases, including car accidents, slip and falls, and product liability claims. This rule helps distribute fault in cases where multiple parties contribute to the incident. - Cases Can Involve Multiple Parties
In some cases, more than two parties share responsibility for an accident. Each party’s fault is calculated, and compensation is distributed based on their individual percentage of fault. This can make comparative negligence cases more complex, as each party’s role must be carefully evaluated.
How Evidence Impacts Fault Determination in Pennsylvania Comparative Negligence Cases
In personal injury cases, evidence plays a crucial role in determining fault percentages. Pennsylvania’s comparative negligence system requires a detailed assessment of each party’s actions, which is why presenting strong evidence can directly impact the amount of compensation you receive. Here’s how different types of evidence contribute to fault determination:
- Police Reports:
Police reports often provide an unbiased account of the accident, including citations issued to any party involved. These reports can help establish who violated traffic laws or acted negligently, influencing fault allocation. - Eyewitness Testimonies:
Statements from witnesses can offer critical perspectives about how the accident occurred. Independent witnesses are especially valuable as they can provide objective details that support your case. - Surveillance Footage:
Video evidence from nearby security cameras or dashcams can visually demonstrate how the accident unfolded, providing clarity when fault is disputed. - Expert Analysis:
Accident reconstruction experts can analyze the scene, vehicle damage, and environmental factors to determine each party’s contribution to the accident. Their findings are often instrumental in court proceedings. - Documentation of Injuries:
Medical records can establish the severity of injuries and whether your actions (or those of the other party) contributed to worsening them. For instance, not wearing a seatbelt may partially shift fault, even if another driver caused the crash.
Providing well-organized evidence not only strengthens your case but can also help refute attempts by the opposing party or insurance adjusters to assign an unfair fault percentage. Working with an experienced attorney ensures that all relevant evidence is collected, presented effectively, and used to secure the best possible outcome.
How Comparative Negligence Applies to Different Types of Accidents in Pennsylvania
Pennsylvania’s comparative negligence rule applies across a wide range of personal injury scenarios. Each type of case comes with unique challenges when determining fault, making it critical to understand how the rule may affect your claim:
- Car Accidents:
In multi-vehicle collisions, fault percentages are often distributed among several parties. For instance, one driver may be speeding while another fails to yield. Pennsylvania’s system ensures that each party’s negligence is accurately assessed before compensation is awarded. - Slip and Fall Accidents:
Property owners may argue that the hazard was “open and obvious,” shifting some responsibility to the injured party. For example, if you ignored a clearly marked “wet floor” sign, the court may assign a percentage of fault to you. - Product Liability Cases:
In defective product claims, manufacturers often argue product misuse or failure to follow instructions. If the plaintiff used the product incorrectly, their fault percentage may reduce compensation. - Medical Malpractice:
Comparative negligence can also apply to medical malpractice cases. For example, if a patient fails to follow post-treatment instructions or provide accurate medical history, they could be found partially at fault for worsening their condition. - Pedestrian Accidents:
Pedestrians may share fault if they cross streets outside of marked crosswalks or while distracted, such as using their phones. Even so, drivers are typically held to a higher standard of care in these cases.
Understanding how Pennsylvania’s comparative negligence rule is applied to your specific case type can help you build a tailored legal strategy. Consulting with an attorney ensures that all factors contributing to the accident are accounted for, maximizing your chances of securing fair compensation.
How Comparative Negligence Affects Personal Injury Compensation
In a personal injury case, the court or insurance company will evaluate each party’s actions to determine fault. The total compensation awarded will then be adjusted based on the plaintiff’s degree of fault.
Under Pennsylvania’s modified comparative negligence rule, plaintiffs cannot recover damages if they are found to be 51% or more at fault.
Example Scenario:
Suppose you were involved in a car accident and sustained $50,000 in damages. The court finds you 20% at fault because you were speeding slightly, while the other driver, who ran a red light, is found 80% at fault. In this case, your compensation would be reduced by 20%, allowing you to recover $40,000.
Effect on Settlements and Verdicts
Pennsylvania’s comparative fault system can significantly impact settlements and verdicts in personal injury cases. This system:
- Allows injured parties to recover damages if they are 50% or less at fault, promoting fairness.
- Provides defendants an opportunity to reduce their liability by proving that the injured party shares fault.
- Encourages accurate fault assessments to ensure equitable outcomes for all parties involved.

Why Pennsylvania Uses Modified Comparative Negligence
Pennsylvania’s 51% bar rule ensures that financial responsibility is distributed fairly among all parties involved in an accident. This system:
- Distributes Financial Responsibility: Each party is held accountable for their portion of fault.
- Promotes Accountability: It ensures that everyone involved takes responsibility for their actions.
- Increases Access to Compensation: Injured parties can recover damages as long as their fault does not exceed 50%.
Protecting Your Rights in a Comparative Negligence Case
Understanding Pennsylvania’s comparative negligence rule is essential for pursuing fair compensation after an accident. If you believe you may share partial fault, contacting an experienced attorney can help:
- Ensure Accurate Fault Assessment: An attorney can help gather evidence to support your case and challenge any unfair fault assignments.
- Maximize Compensation: A lawyer can advocate for a fair settlement or award, even if you bear partial responsibility for the accident.
- Negotiate with Insurance Companies: Insurance adjusters may attempt to assign a higher fault percentage to minimize their payout. An attorney can negotiate on your behalf to secure a fair result.
If you’ve been injured in an accident and believe you may share partial fault, contact Mattiacci Law at 215-914-6919. Our team can help you understand your rights under Pennsylvania’s comparative negligence rule and work to secure the compensation you deserve.
Related Content:
- How to Prove Negligence in Your PA Personal Injury Claim
- How Can I Prove Negligence In a Slip-and-Fall Case in Philadelphia?
- What Is the Statute of Limitations in Pennsylvania for Personal Injury Claims?
- What Evidence Do I Need to Win a Personal Injury Settlement in Philadelphia?
- How a Philadelphia Lawyer Can Maximize Your Accident Compensation
Common Questions About Comparative Negligence in Pennsylvania
What happens if I’m more than 50% at fault?
Can comparative negligence affect an insurance claim?
How is fault determined in a comparative negligence case?
What if multiple people are at fault in an accident?
Can I challenge my fault percentage in a comparative negligence case?
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