No win no fee medical negligence claims: how they work, what you might pay, and when they apply

In England and Wales, many medical negligence claims can be funded on a no win no fee basis, including cases involving surgical mistakes, misdiagnosis and delayed diagnosis. It does not automatically suit every claim, though. The key question for lawyers when looking at a case is not just how serious the injury sounds, but whether there is enough evidence that negligent treatment caused avoidable harm and that the claim has reasonable prospects of success.

What does ‘no win no fee’ mean in a medical negligence claim?

‘No win no fee’ is the everyday name for a Conditional Fee Agreement, usually shortened to CFA. In practical terms, it means you do not pay your legal fees as the claim progresses, but rather if the claim does not succeed, you would not usually pay those fees at all. For many people, that is what makes a medical negligence claim feel possible rather than out of reach.

That said, no win no fee is not applied identically from one law firm to another. A solicitor will usually consider the records, the likely medical issues, whether independent expert evidence is needed to support the case, and whether the value of the claim justifies the cost and risk of pursuing it. Many firms will also recommend After the Event insurance, often called ATE insurance, to protect you against certain case expenses if the claim fails, such as expert report fees or court costs.

Can all medical negligence claims be brought using no win no fee?

Not all of them. Many can, and in practice a large proportion do, but no responsible law firm should promise no win no fee funding for every medical negligence case that comes through the door. The firm will need to decide whether the claim has reasonable prospects of success and whether the evidence is likely to support both ‘breach of duty’ and ‘causation’. Those are the two issues that often make or break these cases.

Breach of duty means the care fell below an acceptable professional standard. Causation means that the failure actually caused injury, or at least made the outcome materially worse. A claim may be genuine and deeply upsetting but still be difficult to run on a no win no fee basis if the medical records are incomplete, the expert evidence is likely to be divided, or the link between the treatment and the harm is medically unclear.

At Ashtons Legal, the vast majority of the medical negligence claims we take on are funded this way, but we will always talk through the options with you once we have the details of your injury and the circumstances in which it occurred.

Does the seriousness of the injury matter?

Yes, but perhaps not in the way people expect. A more serious injury will often mean higher compensation, higher care needs and a stronger commercial case for a solicitor to take on under a no win no fee agreement. But seriousness on its own is not enough. A severe outcome can happen without negligence, just as a less significant injury can still support a strong legal claim if the mistake was clear and the harm was avoidable.

In practical terms, firms usually look at a combination of factors: how clear the issues of breach of duty and causation appear to be, how much expert evidence will be needed, and the likely value of the claim. A relatively modest but well-evidenced claim may be suitable. Equally, a catastrophic injury case may still be too uncertain if the medical position is finely balanced. It is one of those areas where people understandably focus on how serious the consequences were, while lawyers and medical experts are also looking hard at whether the outcome could and should have been avoided.

Can you use no win no fee if a surgical procedure went wrong?

Often, yes. Surgical negligence claims are commonly brought on a no win no fee basis where there is evidence that the problem was caused by negligent treatment rather than an understood complication of surgery. That distinction matters. Every operation carries risk, and the law does not, in itself, treat a poor outcome as proof that someone was negligent.

Typical examples might include operating on the wrong site, avoidable nerve damage caused by poor technique, leaving surgical material behind, failures in post-operative monitoring, or carrying out a procedure without properly explaining material risks and alternatives. Ashtons Legal offers no win no fee funding to investigate surgical negligence claims; however, this investigation will include a proper review of the records and expert evidence, which may not support the case.

What about misdiagnosis or failure to diagnose?

These cases can also be brought on a no win no fee basis, and they are some of the most common enquiries medical negligence teams receive. A misdiagnosis claim is not just about showing that the diagnosis was wrong. It is also about showing that a reasonably competent clinician should have diagnosed the condition earlier, investigated it differently, or acted more quickly, and that the delay caused additional harm.

For example, if cancer symptoms were repeatedly dismissed and the disease progressed from a more treatable stage to a more advanced one, the claim may centre on what difference an earlier diagnosis would probably have made. The same idea often arises in sepsis, stroke, cauda equina syndrome and heart attack cases.

If you win, how much of your compensation might go to your solicitor?

This is usually, and understandably, the question people want answered first. In a successful no win no fee medical negligence claim, the defendant will usually pay a large part of your legal costs, but that does not always mean you keep every penny of the compensation. A success fee may be deducted from your damages, and there may also be an insurance premium to account for, depending on how the case was funded.

In England and Wales, the success fee deducted from compensation in personal injury and clinical negligence matters is capped at 25% of certain parts of the award, usually general damages and past financial losses. Put more simply, that means compensation for pain, suffering and loss of amenity, plus past losses such as lost earnings or care already provided. Future losses, such as future care costs or future loss of earnings, are generally protected from that deduction. That cap is widely explained across the sector and is broadly consistent with how no win no fee medical negligence claims are funded in practice.

The important point is that not every firm applies deductions in exactly the same way. Some are more generous than others on what they recover and what they cap. That is why it is worth asking for a written explanation of the maximum success fee, whether an ATE insurance premium is payable if you win, and whether there could be any other deductions in realistic scenarios. Ashtons Legal always emphasises that clients keep the majority of the compensation awarded to them, and the funding terms will be set out clearly and explained to you before you sign anything.

Do you have to pay anything up front?

Usually, no. One of the main reasons people choose no win no fee funding is that it normally allows them to start a claim without paying legal fees at the outset. If ATE insurance is put in place, that premium is also often deferred and only becomes payable if the claim succeeds. Clients who use Ashtons Legal can pursue claims without paying a penny upfront, where this funding model is used.

Even so, Ashtons Legal will always encourage you to ask questions. For instance, what happens if the case is discontinued? What does the insurance cover? Are there any circumstances in which you could be personally liable for costs? What would the likely deductions be if the claim settles successfully? Good law firms explain all of this, frequently without you needing to ask the questions.

Practical points people often overlook before starting a no win no fee medical negligence claim

Timing matters more than many people realise. In England and Wales, the general rule is that a medical negligence claim should be started within three years of the negligent treatment or the date you first knew, or ought reasonably to have known, that negligent treatment had caused significant injury. There are exceptions, particularly for children and some adults who lack mental capacity, but leaving things too long can make records harder to obtain and expert evidence harder to build.

It is also worth remembering that claims can arise from NHS treatment as well as private treatment. The legal test is not about who provided the care. It is about whether the treatment fell below a reasonable standard and caused avoidable harm. From experience, one of the biggest barriers for clients is not the legal test but uncertainty. They know something went wrong, but they are not sure whether it was negligence, a known complication, or simply terrible luck. That uncertainty is exactly why an early, sensible case assessment matters.

The short version is this: no win no fee can make a medical negligence claim far more accessible, but it is not automatic, and it is not one-size-fits-all. Whether the case involves a surgical error, a delayed diagnosis, or treatment that should have been handled differently, the real question is whether there is enough evidence to show that the care was negligent and that the harm could and should have been avoided. If there is, no win no fee funding is often the route that allows the claim to move forward.

Contact our medical negligence solicitors today

If you believe we can assist you when pursuing a Medical Negligence claim, please get in contact with us on 0330 191 4835 or fill out our online enquiry form.

Our experienced team of lawyers will be able to offer advice and guide you through every step of the claims process, and our in-house Client Support and Rehabilitation Service can help to support you through your recovery.