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Attorney Robert M Knowles
Last Updated: June 10, 2025
Legally Reviewed By: Robert M. Knowles

Attorney & Partner At Knowles Law Firm

When filing a personal injury claim, proving causation is one of the most critical steps. To hold a liable party responsible for an accident, the plaintiff must establish that the defendant’s actions directly led to the victim’s injuries. However, causation is more complex than simply identifying who caused the accident. Courts use two legal concepts – actual cause and proximate cause – to determine whether a defendant should be held legally responsible.

Understanding the difference between actual cause and proximate cause is essential in proving liability in a personal injury case. Additionally, the foreseeability test plays a major role in determining proximate causation, further influencing whether a defendant can be held liable.

What Is Actual Cause?

Defining Actual Cause (Cause in Fact)

Actual cause, also known as “cause in fact,” refers to the direct reason an injury occurs. It answers the “but for” test – would the plaintiff’s injuries have happened but for the defendant’s negligent actions? If the answer is no, then the defendant’s conduct is considered the actual cause of the injury.

For example, if a drunk driver runs a red light and crashes into another car, their reckless driving is the actual cause of the accident. Without their negligence, the accident would not have happened.

Proving Actual Cause in a Personal Injury Case

To establish actual cause, plaintiffs must provide strong evidence such as medical records, witness statements, video surveillance, and police reports. These items help demonstrate the direct link between the defendant’s negligent action and the resulting injury.

Still, showing the actual cause alone is not enough to make the defendant legally culpable. Courts must also examine whether the injury was a foreseeable result of the conduct – this is where proximate cause comes into play.

What Is Proximate Cause?

Proximate Cause as Legal Cause

While actual cause identifies what physically led to an accident, the proximate cause determines legal liability. It focuses on whether the defendant’s actions created a foreseeable risk that led to the plaintiff’s harm. Courts use this standard to ensure defendants are not unfairly held liable for injuries that were too far removed from their conduct.

For instance, a manufacturer who fails to properly test a product that later malfunctions may face claims of proximate causation if the failure results in injury. The injury must be a foreseeable outcome of the defendant’s conduct for proximate cause to apply.

The Role of Foreseeability in Determining Proximate Cause

Foreseeability helps courts decide if the connection between a defendant’s actions and the injury is close enough to justify holding the defendant liable. If an injury is deemed too unpredictable or if other factors intervene, the defendant may not be legally responsible.

In tort law, courts sometimes rule out proximate cause when other factors break the chain of events. For example, if a distracted driver causes a crash, but the injured person is later harmed by medical malpractice, the court may find that the doctor’s negligence was the proximate cause, not the driver’s.

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The “But For” and “Substantial Factor” Tests in Personal Injury Cases

The “But For” Test

The “but for” test is commonly used to establish actual cause. It asks whether the plaintiff’s injuries would have occurred but for the defendant’s negligent action. If the answer is no, the defendant’s conduct may be legally sufficient to prove liability.

The Substantial Factor Test

When multiple factors contribute to an injury, courts may apply the substantial factor test instead. This approach assesses whether the defendant’s actions were a substantial factor in causing injury, even if other elements were also involved. A defendant may still be liable if their actions significantly contributed to the plaintiff’s harm, making them a legally sufficient cause.

Examples of Actual and Proximate Cause in Action

In car accident cases, actual and proximate cause often work together. If a driver speeds through a red light and hits a car, the speeding is the actual cause. If the injured person’s harm worsens due to a defective seatbelt, both the driver and the seatbelt manufacturer might share responsibility under proximate causation.

In slip and fall claims, a business failing to address a clear hazard, such as a wet floor, can lead to the conclusion that the defendant’s negligence was both the actual and proximate cause of the injury.

Why Proving Causation Matters in Nebraska Personal Injury Claims

Establishing both actual and proximate cause is essential to recovering compensation in a personal injury case. Failing to prove legal cause can result in a dismissal of the claim. In Nebraska, a personal injury lawyer can gather and present key evidence to prove causation – including video footage, medical documentation, and expert testimony – and show that the defendant’s actions were a legally culpable cause of the injury.

The Role of a Personal Injury Lawyer in Determining Proximate Cause

Understanding the proximate cause is vital in cases where other factors may also be involved. A skilled attorney can help clarify the chain of events that led to the injury and argue how the defendant’s negligence played a significant part.

When multiple parties are involved, a personal injury lawyer evaluates the sequence of actions and applies the substantial factor test to determine how responsibility should be allocated. Legal knowledge, experience in tort law, and access to professional investigators give you a stronger chance of holding the defendant liable.

Why Legal Representation Matters

When causation is unclear or complex, proving that the defendant’s actions were a substantial factor in causing injury becomes more difficult. Insurance companies may argue that other events, not the defendant’s negligence, caused the injury. An attorney helps ensure you’re not unfairly blamed when another party’s conduct caused your harm.

Working with legal counsel is especially important when proving proximate cause. A personal injury attorney knows how to present evidence, assess other factors, and demonstrate how the injury was a foreseeable risk based on the defendant’s actions.

How a Personal Injury Lawyer Can Help Establish Causation

Proving actual and proximate cause can be complex, especially when multiple factors contribute to an injury. An Omaha personal injury attorney plays a crucial role in:

  • Investigating evidence to determine the cause of an injury

  • Applying the foreseeability test to establish proximate causation

  • Proving liability using accident reports, witness statements, and expert testimony

  • Negotiating with insurance companies to secure fair compensation

Without proper legal representation, defendants and insurance companies may try to shift blame, arguing that another factor, not their negligence, was the cause of the accident. Working with a personal injury attorney ensures that the right parties are held liable.

Frequently Asked Questions

What is the difference between actual cause and proximate cause in personal injury cases?

Actual cause, or cause-in-fact, refers to the direct connection between the defendant’s actions and the harm that occurred. It answers the “but-for” test: would the injury have happened but for the defendant’s actions? Proximate cause, on the other hand, determines whether the harm was a foreseeable result of the defendant’s negligence. Both are essential to proving causation and liability in personal injury claims.

An experienced personal injury attorney can collect and present critical evidence, such as accident reports, witness statements, and medical records, to establish that the defendant’s actions were the proximate cause of your injuries. They ensure the legal principle of foreseeability aligns with the facts of your case.

Understanding actual vs proximate cause is essential because it determines who is legally responsible for the injury. While actual cause identifies the direct link, proximate cause limits liability to injuries that were foreseeable. Both are critical elements to securing compensation for the plaintiff.

Yes, multiple causes can exist. Courts assess these causes using tests like the “but-for” test for actual cause and the foreseeability test for proximate cause. If the defendant’s actions significantly contributed to the injury, they can still be held liable, even if other factors were involved.

A personal injury lawyer plays a vital role by building a strong case to show that the defendant’s actions caused your injury. They collect evidence to prove both actual and proximate cause, ensuring your claim meets Nebraska’s legal standards for negligence and helping you pursue compensation.

Attorney Robert M Knowles
About Our Attorney

Robert M. Knowles

Attorney & Partner at Knowles Law Firm

Robert has tried cases in both state and federal courts and was selected as one of the top 100 litigation lawyers in Nebraska for 2014 by the American Society of Legal Advocates. Less than 1.5 percent of lawyers nationally are selected for this recognition. He is rated AV by Martindale-Hubbell which is the highest rating an attorney can obtain. He was also selected by Martindale-Hubbell as a 2019 Top Rated Lawyer.

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