
Negligence is a foundational concept in tort law, establishing the legal liability of a defendant to a plaintiff based on the defendant's failure to fulfil a responsibility recognised by law. The elements of a negligence claim include the duty to act or refrain from action, breach of that duty, actual and proximate cause of harm, and damages. The concept of negligence is linked to the obligation of individuals to exercise reasonable care in their actions and to consider foreseeable harm that their conduct might cause to other people or property.
| Characteristics | Values |
|---|---|
| Definition | Negligence is a failure to exercise appropriate care expected to be exercised in similar circumstances. |
| Tort Law | Negligence is a foundational concept of tort law. |
| Duty of Care | The concept of negligence is linked to the obligation of individuals to exercise reasonable care in their actions and to consider foreseeable harm that their conduct might cause to other people or property. |
| Legal Duty | Generally, members of society have entered a social contract that includes a duty to not cause harm to others. |
| Reasonable Person | When a jury is asked to determine if a defendant’s actions were reasonable, the standard is what a "reasonable person" would have done in the defendant’s situation. |
| Breach of Duty | A defendant breaches their duty by failing to exercise reasonable care. |
| Cause-in-Fact | The jury needs to consider if the plaintiff’s harm would not have occurred but for the defendant’s conduct. |
| Proximate Cause | The defendant’s breach of the duty of care must be the actual cause of the harm to the plaintiff. |
| Damages | Damages include physical injury, harm to property, psychiatric illness, or economic loss. |
| Comparative Fault | In most states, the plaintiff may recover damages even if they were more negligent than the defendant. |
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What You'll Learn

Duty of care
The concept of negligence is linked to the idea that individuals have a duty of care to exercise reasonable care in their actions and to consider foreseeable harm that their conduct might cause to other people or property. In the tort of negligence, the term used is "duty of care". The duty of care is the first step in determining the existence of a legally recognised responsibility.
In the Donoghue v Stevenson case of 1932, the modern law of negligence was established, laying the foundations of the duty of care and the fault principle. The case involved a customer at a café who suffered nervous shock and gastro-enteritis after drinking a ginger beer float containing the decomposed remains of a snail. The customer sued the manufacturer, establishing the principle that the defendant's breach of the duty of care must be the actual cause of the harm to the plaintiff.
In England, the case of Caparo Industries Plc v Dickman (1990) introduced a "threefold test" for a duty of care. Harm must be (1) reasonably foreseeable, (2) there must be a relationship of proximity between the plaintiff and defendant, and (3) it must be "fair, just, and reasonable" to impose liability. These act as guidelines for courts, with much of the principle still at the discretion of judges.
Certain jurisdictions also provide for breaches where professionals, such as doctors, fail to warn of risks associated with medical treatments. For example, in Montgomery v Lanarkshire Health Board, the UK Supreme Court decided that doctors are under a duty to ensure patients are aware of material risks and reasonable alternative treatments, a form of informed consent.
In the context of automobile accidents, a driver has a duty to use reasonable care to avoid injuring anyone they encounter on the road. If a driver fails to exercise reasonable care and injures someone as a result, they are liable for those injuries. This liability arises from careless or thoughtless conduct or a failure to act when a reasonable person would have acted.
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Breach of duty
Negligence is a foundational concept in tort law. It pertains to harm caused by the violation of a duty of care through a negligent act or failure to act. A breach of duty occurs when a person's conduct fails to meet an applicable standard of care. In other words, the person fails to exercise reasonable care expected under similar circumstances. This can be through an action or an omission.
To establish a breach of duty, it must be proven that the defendant owed a duty of care to the plaintiff and that this duty was breached. The standard of care expected of the defendant is determined based on what a reasonable person would have done in the defendant's situation. This is often decided by a jury as a question of fact. The standard of care varies depending on the relationship between the plaintiff and the defendant. For example, in the case of a car accident, a driver has a duty to follow traffic laws to prevent accidents. If a driver texts while driving and causes a collision, they have breached their duty to operate the vehicle safely and responsibly.
In medical malpractice, a breach of duty can occur when a doctor fails to diagnose a treatable condition or provide appropriate treatment. For example, if a physician overlooks clear symptoms of a disease and does not order necessary tests, resulting in a deterioration of the patient's health. In such cases, the doctor has breached their duty to provide the appropriate standard of medical care.
Premises liability is another area where breaches of duty are common. Store owners, landlords, and property managers have a duty to maintain a safe environment for visitors. For instance, if a store owner is aware of a spill on the floor but fails to clean it up or put up a warning sign, and a customer slips and falls, the store owner has breached their duty of care.
To summarise, a breach of duty occurs when an individual fails to exercise reasonable care, resulting in harm to another person. This can be through an action or an omission, and it is determined by comparing the individual's conduct to the standard of care expected of a reasonable person in similar circumstances.
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Causation
Proximate cause considers the scope of the defendant's responsibility and the foreseeability of the harm caused. It evaluates whether the defendant could have reasonably foreseen that their actions or inactions could result in harm to the plaintiff. For example, in an automobile accident, if a driver runs a red light and causes a rear-end collision, the driver should have foreseen that their action of disregarding the traffic signal could lead to an accident and potential harm to others.
Cause-in-fact, on the other hand, focuses on the direct connection between the defendant's conduct and the plaintiff's harm. It asks whether the plaintiff's harm would not have occurred "but for" the defendant's actions. In the context of the previous example, the driver's failure to stop at the red light directly resulted in the collision, and the plaintiff's injuries can be attributed to this negligent act.
The analysis of causation also takes into account intervening factors and plaintiff conduct. Intervening factors are subsequent events that occur after the defendant's initial actions and may impact the harm suffered by the plaintiff. Plaintiff conduct refers to the actions or behaviours of the plaintiff that might influence the analysis of causation.
It is important to note that negligence cases often involve evaluating the comparative fault of the involved parties. Juries or judges decide on the proportion of negligence attributed to each party, which then determines the liability and compensation owed.
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Damages
In negligence cases, plaintiffs must prove both the occurrence of harm and its reasonable foreseeability by the defendant. This foreseeability aspect is integral to establishing the defendant's liability. If the damages fall outside the scope of foreseeable risks, the plaintiff cannot demonstrate proximate cause, a critical element of negligence claims. Proximate cause signifies a direct relationship between the defendant's actions and the plaintiff's damages, considering what a reasonable person could have anticipated.
Economic damages refer to financial losses incurred by the plaintiff due to the defendant's negligence. These may include medical expenses, repair costs, and loss of income. Non-economic damages, on the other hand, address intangible losses, such as pain and suffering, mental anguish, emotional distress, or loss of consortium. Non-economic damages can be more challenging to quantify and often depend on the specifics of the case.
While plaintiffs typically need to demonstrate pecuniary losses in negligence cases, certain exceptions exist. For instance, in some jurisdictions, emotional distress is recognised as a valid form of harm, even without accompanying physical or pecuniary injury. However, the circumstances surrounding the emotional distress and its impact on the plaintiff may be scrutinised by the court.
To determine the appropriate amount of damages, courts may consider factors such as the severity of the harm, the plaintiff's age and life expectancy, and the likelihood of the plaintiff's recovery. Additionally, the court may take into account any mitigating actions taken by the defendant to minimise the harm or express remorse.
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Reasonable care
In personal injury cases, a defendant is held to the same standard of reasonable care as a more careful person or a person of higher intelligence. A jury decides whether a defendant has acted as a reasonable person would have, in addition to considering the other elements of negligence. The jury will consider the defendant's actual knowledge—for example, whether they knew or ought to have known that their conduct would harm the plaintiff.
The concept of reasonable care is linked to the obligation of individuals to exercise reasonable care in their actions and to consider foreseeable harm that their conduct might cause to other people or property. For example, a driver has a legal duty to obey traffic rules and not cause harm to other road users. A doctor has a duty to provide competent medical care to their patients. In the case of Montgomery v Lanarkshire Health Board, the UK Supreme Court decided that doctors are under a duty to ensure patients are aware of the material risks of treatment and to make them aware of any other reasonable treatment options.
In the context of negligence, reasonable care is assessed in terms of the foreseeable likelihood that conduct will result in harm, the foreseeable severity of the harm, and the burden of precautions necessary to reduce the risk of harm. The defending party breaches their duty of care to the plaintiff if the burden of taking precautions is less than the probability of injury multiplied by the severity of the resulting injury.
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Frequently asked questions
Negligence is a foundational concept of tort law. It pertains to harm caused by the violation of a duty of care through a negligent act or failure to act.
The elements of negligence include the duty to act or refrain from action, breach of that duty, actual and proximate cause of harm, and damages. The duty of care is generally owed by a defendant to a plaintiff and is based on the defendant's failure to fulfil a responsibility recognised by law.
Negligence is determined by a judge or jury who decide what an "ordinary" or "reasonable person" would have done in similar circumstances. The jury considers the foreseeable likelihood that the conduct would result in harm, the foreseeable severity of the harm, and the burden of precautions necessary to reduce or eliminate the risk of harm.

































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