If you have been injured in an accident that wasn’t your fault and want to claim compensation, you must do this within certain time limits….
What is the date of knowledge?
The date of knowledge in personal injury claims is when a claimant first knew, or ought to have known, that they suffered an injury caused by another person’s negligence.
We are a claims management company regulated by the Financial Conduct Authority.
What is the date of knowledge in personal injury claims?
If you suffer an injury due to someone else’s negligent act or omission, you generally have three years to start a personal injury claim. This limitation period usually begins from the date of knowledge.
The date of knowledge in personal injury claims refers to the time you first knew, or should have reasonably known, that you may have suffered harm because of someone else’s fault.
In many cases, the date of knowledge is the same as the accident date. However, not all injuries are immediately obvious, and some develop gradually, over weeks, months or even years. When this happens, the three-year time limit may begin from when the injury is diagnosed and linked to negligence.
By submitting this form you agree to be contacted by our partners. Find out how we handle your data in our privacy policy.
Table of Contents
What is the limitation period for personal injury claims?
A limitation period is a strict legal timeframe within which you can start a personal injury claim for compensation, set out by the Limitation Act 1980.
In most cases, the limitation period is three years, meaning you have three years to start formal court proceedings. Failing to do so would entitle the defendant to raise a limitation defence and ask the court to dismiss your claim.
In most cases, the three year limitation period starts to run from either:
- The date of the accident or injury (if immediately apparent)
- The date of knowledge (if the harm is discovered at a later date)
In many cases involving delayed symptoms, progressive damage or chronic illnesses, the date of knowledge is the key starting point in personal injury claims.
What is the date of knowledge in personal injury cases?
Under Section 14 of the Limitation Act 1980, the date of knowledge in personal injury claims refers to the date when a person first knew (actual knowledge) or should have known (constructive knowledge) the following:
- That they have suffered a significant injury
- That the injury was partially or entirely attributable to another party’s negligence
- The identity of the defendant who is potentially liable for compensation
Constructive knowledge means that, given the circumstances, the court believes a reasonable person would have been aware of the link between their injury and the defendant’s actions, even if they did not fully understand it at the time.
Determining the date of knowledge can be complicated, which is why it’s essential to seek expert advice from a specialist solicitor as soon as possible.
What types of personal injury claims does the date of knowledge apply to?
The date of knowledge typically applies to claims where an injury or its cause is not immediately apparent, as symptoms may take time to develop.
Some of the most common examples include:
- Industrial disease claims, such as asbestos-related diseases or occupational asthma
- Repetitive strain injury claims, such as bursitis, carpal tunnel syndrome and tendonitis
- Hearing loss claims caused by long-term exposure to excessive noise in the workplace
- Clinical negligence claims where a misdiagnosis or surgical error is not discovered until later
- Psychological injury claims where symptoms take time to develop or be diagnosed
- Whiplash claims, where symptoms develop days or weeks after a car accident
- Hazardous substance claims involving lead, silica dust or pesticides causing damage over time
The date of knowledge does not apply to accidents where the damage is immediate and the cause of injury is obvious from day one, such as a fall from height resulting in a broken wrist.
Are there any exceptions to the date of knowledge?
Yes. Several exceptions can apply to the standard three-year limit to start a claim after the date of knowledge, including:
- Children – A parent or legal guardian can make a child injury claim at any time before the child turns 18, regardless of when the injury occurred, or they had knowledge of it. After turning 18, the child has until their 21st birthday to start a claim on their own.
- Mental capacity – There is no limitation period if the claimant lacks the mental capacity to manage their own affairs or to understand they have a valid claim. The 3 years only begin to run if they regain capacity.
- Criminal assaults – There is a standard 2-year time limit to make a criminal injury claim through the Criminal Injuries Compensation Authority (CICA) following a violent incident.
When you speak to a solicitor, they will be able to determine whether you are still within the legal time limit for starting your claim.
What evidence is used to prove the date of knowledge?
While this is not always clear-cut, various types of evidence can be used to prove the date you knew, or should have reasonably known, that you suffered an injury due to the defendant’s fault.
The most important type of evidence is medical records showing the exact date on which a GP or specialist offered a diagnosis or a causal link between your condition and a negligent act or omission.
Other types of supporting evidence include:
- Occupational health report and workplace exposure records
- Accident and police reports
- Statements from witnesses who can help establish a timeline of events
- Correspondence such as letters or emails showing awareness of symptoms
- Expert testimony from independent healthcare professionals and other specialists
Your solicitor will help prove that your claim is within the statute of limitations, and you could not have become aware earlier that a cause of action arose.
Why you should seek legal advice as soon as possible
Even though the law allows a generous limitation period to make a claim for compensation, it is always best to start as soon as possible. Delays can lead to lost evidence, lost witness testimonies and a weaker case, potentially resulting in a lost claim or lower compensation.
Here’s why you should start as early as possible:
- Evidence such as employment records and CCTV footage can be lost or destroyed over time
- Witnesses may be harder to find, and their memories fade over time
- Medical records and specialist reports are easier to obtain closer to the injury
- You can access private medical treatment and rehabilitation to improve your recovery
- You may miss the deadline if you start late, as building a case can take a lot of time
- If liability is admitted, your solicitor could secure interim payments on your behalf
To put it simply, the sooner you start your claim, the better your chances of success. A solicitor can also determine whether the date of knowledge rules apply to your case and prevent your claim from being time-barred.
Date of Knowledge FAQs
The Limitation Act 1980 is the main law that sets the time limits for bringing a claim in the UK, including for personal injury cases.
Yes. This is often the case for injuries that develop over time or cannot be immediately diagnosed, such as in industrial disease or medical negligence claims.
Yes. Psychological injuries such as anxiety, depression or post-traumatic stress disorder (PTSD) often develop over time, so the limitation period may start when a diagnosis is made, and symptoms are clearly linked to an incident.
If you miss the limitation period, your claim will usually be time-barred, meaning you lose the legal right to compensation even if your case has merit.
Yes. Under Section 33 of the Limitation Act 1980, the court has discretion to extend the 3-year limitation period when it is fair and reasonable to do so, considering the reason and extent of the delay.
To learn more about what the date of knowledge is in personal injury claims, and what limitation date could apply to your case, call 0800 470 0474 today or request a call back. An experienced solicitor will offer you a free initial consultation, with no obligation to proceed.
