Personal Injury Claim Time Limits UK

One of the most important things to understand about UK personal injury law is the time limit for bringing a claim. Miss the deadline and your right to compensation can be lost forever — no matter how strong your case would have been. The good news is that the rules are clear, and most claimants have more time than they realise. The bad news is that the exceptions are technical, and getting the date wrong can be catastrophic.

In this guide

• The Standard Three-Year Time Limit
• When the Clock Starts — The “Date of Knowledge”
• Children — Time Doesn’t Start Until 18
• People Who Lack Mental Capacity — Time Can Be Paused Indefinitely
• Fatal Claims — Three Years from the Date of Death
• Industrial Disease — The Date of Knowledge Often Decides Everything
• Criminal Injuries (CICA) — Two Years, Not Three
• Accidents Abroad — Often Shorter and More Complex
• Defective Product Claims — Three Years Plus a Ten-Year Long-Stop
• The Section 33 Discretion — When Late Claims Can Still Succeed
• What to Do If You Think You’re Running Out of Time
• Common Questions About Personal Injury Time Limits
• Related Guides
• Our Partner's Fees Explained
• Check If You Could Claim Compensation For Your Injury

This guide explains the standard three-year personal injury time limit, when the clock starts, the major exceptions (children, mental capacity, fatal claims, industrial disease, abroad), and what to do if you think you might be running out of time. If you are close to the deadline, contact a specialist solicitor immediately — claims have been brought successfully with less than a week to spare.

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The Standard Three-Year Time Limit

Under section 11 of the Limitation Act 1980, the standard time limit for a UK personal injury claim is three years. The clock starts on the later of:

1. The date of the accident (for sudden incidents like RTAs, falls, or workplace accidents); or
2. The date of knowledge — the date on which you first knew (or could reasonably have known) that your injury was significant and was caused by the act or omission you would later complain of

For most accidents, the two dates are the same — you knew immediately you had been hurt and by whom. For other cases — particularly industrial diseases or delayed-onset medical negligence injuries — the date of knowledge is much later than the date of the original act. The clock runs from the later date.

You must issue court proceedings within three years to preserve the claim — not merely instruct a solicitor or write a letter. In practice, this means contacting a solicitor at least 6 to 9 months before the deadline is essential to give them time to investigate, gather evidence, and issue proceedings if necessary.

When the Clock Starts — The “Date of Knowledge”

For many personal injury claims the “date of knowledge” is straightforward — you knew on the day of the accident exactly what had happened and who was at fault. For other cases, the date of knowledge is contested or comes much later than the original event.

The Limitation Act 1980 says the date of knowledge is when you first knew:

• That the injury was significant (the kind of injury that would justify proceedings)
• That the injury was attributable to the act or omission you would later complain of
• The identity of the defendant (or facts that would lead you to identify them)

You are deemed to have knowledge of any fact that you could reasonably have ascertained — for example by asking a doctor or solicitor — even if you did not actually know it at the time. This is the “constructive knowledge” rule, and it prevents claimants from waiting too long before investigating.

In industrial disease cases the date of knowledge is often years (or decades) after the exposure — because diseases like mesothelioma have very long latencies. In medical negligence cases it can be months or years after the original treatment, particularly where complications develop slowly or where the link to substandard care is not immediately apparent.

Children — Time Doesn’t Start Until 18

For anyone injured under the age of 18, the three-year clock does not start until their 18th birthday. This means:

• A child injured at age 5 has until their 21st birthday to start a claim themselves
• A child injured at age 14 has until their 21st birthday — not their 17th
• A claim can be brought on the child’s behalf by a parent or “litigation friend” before they turn 18, but the right is theirs to take when adult

For claims involving children, courts also have additional protections — any settlement must be approved by a judge before being finalised. See our children’s personal injury claims guide.

People Who Lack Mental Capacity — Time Can Be Paused Indefinitely

Under section 28 of the Limitation Act 1980, where the injured person lacks mental capacity (within the meaning of the Mental Capacity Act 2005), the three-year clock is paused for as long as the lack of capacity continues. This is particularly important for:

• People with severe traumatic brain injury who cannot manage their own affairs
• People with cerebral palsy or other developmental brain injuries
• People with significant mental health conditions affecting capacity
• People with dementia or severe cognitive impairment

If capacity is regained, the three-year clock starts from that point. If capacity is never regained, there is no time limit — but in practice the claim is usually brought by a “litigation friend” once it becomes clear that capacity will not return. See our protected parties explained guide.

Fatal Claims — Three Years from the Date of Death

Where the injured person has died as a result of an accident or negligence, the time limit runs from the date of death, not the date of the original incident. Two parallel claims arise:

• Estate claim — brought by the executor under the Law Reform (Miscellaneous Provisions) Act 1934 for the suffering the deceased experienced before death and for the funeral expenses
• Dependency claim — brought by financial dependants (spouse, children, partners) under the Fatal Accidents Act 1976 for their loss of dependency, plus the bereavement award (currently £15,120 in England & Wales) for qualifying relatives

Both have a three-year time limit from the date of death. If the deceased had already started a personal injury claim before they died, the executor takes it over. See our fatal accident compensation guide.

Industrial Disease — The Date of Knowledge Often Decides Everything

Industrial disease claims involve some of the most extreme date-of-knowledge issues in UK personal injury law. The most common situations:

• Mesothelioma — usually 20 to 50 years after asbestos exposure. The date of knowledge runs from diagnosis, not exposure
• Asbestosis — typically 15 to 30 years after exposure. Date of knowledge from diagnosis or clear awareness of the link
• Asbestos lung cancer — typically 20 to 40 years after exposure. Date of knowledge from diagnosis with awareness of the asbestos link
• Industrial deafness — develops gradually over years. Date of knowledge often from formal audiometry or a doctor’s confirmation that the loss is work-related
• Vibration White Finger — develops within 5 to 10 years of exposure. Date of knowledge from medical diagnosis of work-related cause
• Occupational asthma — date of knowledge typically from formal diagnosis confirming a work-related cause

For each of these, the question is not when you were exposed, but when you first knew (or reasonably should have known) that your illness was caused by work. For most claimants this is the date of formal medical diagnosis confirming the work-related cause — meaning historic claims are usually still possible if diagnosis is recent. See our industrial disease claims hub.

Criminal Injuries (CICA) — Two Years, Not Three

Criminal Injuries Compensation Authority claims have a strict two-year time limit from the date of the incident — shorter than the three-year personal injury limit and far less flexible about extensions. Late applications can be considered where there are good reasons, but each case is decided on its facts.

For child victims of crime, the two-year clock generally does not start until their 18th birthday. For historic abuse cases the CICA position is complex but late applications can succeed where the delay is explained. See our CICA claims hub and our CICA two-year deadline guide.

Accidents Abroad — Often Shorter and More Complex

For accidents that happened outside the UK, the time limit depends on the country and the legal framework. Common patterns:

• Package holiday accidents brought against UK tour operators under the Package Travel Regulations — three years (UK rules apply)
• Accidents on EU motorways or in EU countries brought against EU insurers — varies, often shorter than UK
• Accidents in the United States — typically much shorter, varying by state (sometimes as short as one year for personal injury)
• Cruise ship accidents — typically two years under the Athens Convention
• Accidents in Spain, France, Italy — typically shorter than UK and with different starting-point rules

For accidents abroad, time limit analysis is one of the first things a specialist solicitor will do. Acting quickly is essential. See our holiday accident claims hub.

Defective Product Claims — Three Years Plus a Ten-Year Long-Stop

Defective product claims under the Consumer Protection Act 1987 have two parallel limits:

1. Three years from the date of injury or date of knowledge — standard PI limit
2. Ten-year long-stop from the date of supply — no claim under the CPA 1987 can be brought more than ten years after the manufacturer first supplied the product

The ten-year long-stop is unusual in UK personal injury law. For products supplied more than ten years ago, the negligence route may still be available. This is particularly relevant for medical device claims (such as surgical mesh) where harm can emerge many years after implantation. See our defective product injury claims guide.

The Section 33 Discretion — When Late Claims Can Still Succeed

Even where the standard three-year limit has expired, the court has a discretion under section 33 of the Limitation Act 1980 to allow the claim to proceed if it would be “equitable” to do so. The court considers:

• The length of and reasons for the delay
• The effect of the delay on the defendant’s ability to defend
• The conduct of both parties
• The duration of any disability of the claimant
• Whether the claimant acted promptly once they had knowledge
• The steps taken to obtain medical, legal or other advice

Section 33 is not a soft option — defendants robustly resist late applications, and the court must be satisfied that allowing the claim is fair. But many late applications succeed, particularly where the delay was for a good reason (such as the claimant’s psychological injury preventing earlier action) and the evidence is still available. Specialist solicitors regularly bring out-of-time claims under section 33.

What to Do If You Think You’re Running Out of Time

If you are close to a deadline:

1. Contact a specialist solicitor immediately — even one with a few weeks to go can be enough
2. Do not delay further — the closer you are to the deadline, the more risk
3. Be honest about dates — if you think there’s any chance you’re out of time, say so. Solicitors can often find a date-of-knowledge argument that gives you more time
4. Bring all your evidence to the first call — medical records, accident reports, correspondence with insurers. Saves time
5. Be prepared to act fast on instructions — if proceedings need to be issued urgently, signatures and documents may be needed within days

Specialist solicitors regularly issue claims with less than a week to spare — but the more notice they have, the more strategic the approach. Acting now is always better than acting tomorrow.

Common Questions About Personal Injury Time Limits

How exactly is the three-year deadline calculated?

For most cases, the deadline is the third anniversary of the accident or date of knowledge — so an accident on 15 May 2023 gives you until 14 May 2026 to issue proceedings. The day of the accident itself is not normally counted, but the safe approach is to allow a small margin and issue well before the anniversary.

Does writing to the insurer or starting a claim with a solicitor stop the clock?

No. The clock only stops when court proceedings are issued — meaning a Claim Form and Particulars of Claim are lodged at the court. Writing to the insurer, instructing a solicitor, or even sending a Letter of Claim does not stop the limitation clock. This is why specialist solicitors leave several months between Letter of Claim and the deadline.

Can I extend the deadline by agreement with the defendant?

Yes — both parties can agree to a “standstill agreement” extending the limitation period. This is common in complex cases where investigation is still ongoing. The agreement must be in writing and clearly recorded. Defendants are often willing to agree because it allows them to investigate properly without the threat of urgent proceedings.

My accident was 5 years ago. Is it definitely too late?

Not necessarily. For some claim types (industrial disease, medical negligence, abuse, claims involving children, claims involving people without mental capacity) the date of knowledge or the relevant exception may mean the claim is still in time. Even where it isn’t, section 33 discretion can allow late claims to proceed in some circumstances. A free initial consultation will tell you where you stand.

I was injured at work but only realised it was work-related years later. When does the clock start?

From your date of knowledge — when you first knew (or reasonably could have known) that your injury was work-related. For RSI, hearing loss, HAVS, asbestos diseases, or chronic conditions that develop slowly, the date of knowledge is usually when a doctor (often an occupational health physician or a specialist) made the link. Specialist solicitors deal with these date-of-knowledge issues routinely.

I want to claim for my child’s injury. Do I have to wait until they’re 18?

No. A parent or “litigation friend” can bring a claim on a child’s behalf at any point during childhood. Many parents prefer to do so while the events are fresh and evidence is available. The child’s right to claim themselves remains until their 21st birthday. See our children’s personal injury claims guide.

Related Guides

Personal Injury Claims — UK No Win No Fee

How the Personal Injury Claim Process Works

How Long Does a Personal Injury Claim Take?

Fatal Accident & Wrongful Death Compensation Claims

Children’s Personal Injury Claims Explained

Protected Parties in Personal Injury Claims

CICA Two-Year Deadline Explained

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