Searching for a medical negligence calculator is a reasonable starting point. You want to know whether a claim is worth pursuing, what figure you might realistically receive, and whether the process is worth the effort. No tool can give you that number, because compensation in clinical negligence is always fact-specific. What this page can do is explain exactly how compensation is assessed, so you understand the framework before you speak to a specialist.
Reading this costs you nothing and commits you to nothing. If, at the end, you want to know what your situation might be worth, the initial assessment at AAA Solicitors is free and takes place with no obligation to proceed.
Can an online medical negligence calculator give you an accurate figure?
No online tool can give you a reliable compensation figure for a clinical negligence claim. The amount depends entirely on the specific harm you suffered, its long-term effects on your life, and the financial losses it has caused you personally. None of those inputs can be captured by a form on a website.
What online calculators typically display are broad injury ranges drawn from the Judicial College Guidelines (JCG), the reference document courts and solicitors use to assess general damages. These are starting points, not conclusions. The "severe brain damage" category in the JCG spans a range of over £200,000 in general damages alone, depending on the claimant's age, degree of disability, level of insight, and ongoing care requirements. Two claimants with the same diagnosis can have very different compensation figures. The only way to get a realistic estimate for your case is a free initial assessment with a specialist who can look at your records and your losses in detail. If you are ready to take that step now, you can check your claim and a specialist will be in touch.
What are the two heads of compensation in a medical negligence claim?
Every medical negligence compensation award has two distinct components: general damages and special damages. Understanding both is essential to understanding why claims vary so much in value, and why the figure a calculator might show you represents only part of the picture.
General damages compensate you for pain, suffering, and loss of amenity. This covers the physical and psychological impact of the injury, including the effect on your ability to work, socialise, pursue hobbies, and enjoy daily life. These figures are assessed against the Judicial College Guidelines, which set published brackets for different injury types and severity levels.
Special damages compensate you for your actual financial losses, both incurred and projected. They include lost earnings (if the injury has prevented or limited your ability to work), the cost of care (professional or informal), adaptations to your home or vehicle, medical treatment and therapies, prescription costs, and travel expenses associated with the injury. Special damages must be proved by evidence: payslips, receipts, invoices, and expert reports. In serious cases, the special damages schedule, built item by item with actuarial evidence for future losses, can far exceed the general damages figure.
How are general damages assessed?
General damages in a medical negligence claim are assessed by reference to the Judicial College Guidelines, which set out compensation brackets organised by injury type and severity. The 18th edition, published in April 2026, contains the current inflation-adjusted ranges. Courts treat these brackets as reference points: the actual award within a bracket depends on the claimant's specific circumstances.
To give a sense of scale across the range:
- Minor injuries with full or near-full recovery: from a few thousand pounds to around £15,000 in general damages
- Moderate injuries with lasting but manageable effects (for example, significant scarring, moderate psychiatric harm, or partial loss of function in a limb): roughly £20,000 to £60,000
- Serious injuries involving significant loss of function, organ damage, or serious neurological effects: £60,000 to £150,000
- Severe injuries, including significant brain damage, loss of a limb, or serious psychiatric conditions: £150,000 to £280,000
- Catastrophic injuries such as high-level spinal cord injury, tetraplegia, or severe brain damage with minimal awareness: £280,000 to over £400,000 in general damages alone
These figures are for general damages only and do not include any financial losses. In catastrophic cases, adding a lifetime schedule of care costs, lost earnings, and adapted housing can take the total award into several million pounds. The 17th edition of the JCG, published in 2024, increased most brackets by approximately 22% from the prior edition. The 18th edition has made further adjustments, including a new bracket for miscarriage.
All figures must be attributed to the Judicial College Guidelines. Courts and practitioners use them as a framework, not as a guarantee of any specific outcome.
How are special damages calculated?
Special damages are calculated from evidence of your actual losses, not from a published scale. Unlike general damages, where the JCG provides a bracket to work within, special damages are built from the ground up using a Schedule of Loss.
Past special damages cover the period from the date of the negligent act to the date of settlement or trial. These are the more straightforward element: wage records establish lost earnings, care receipts document paid care costs, and invoices cover treatment, adaptations, and travel.
Future special damages are more complex and require expert evidence. A care expert assesses your ongoing needs and costs. An employment expert calculates the earning capacity you have lost. An actuary applies a multiplier based on your life expectancy to produce a projected lifetime cost. In a birth injury case where a child requires around-the-clock care for 60 or 70 years, future care costs alone can reach several million pounds. This is why birth injuries account for over half of the total value paid by NHS Resolution despite representing only around 11% of new claims by volume.
The full claims process on this site explains how the Schedule of Loss is prepared and exchanged with the defendant.
What does the 25% success fee mean for your payout?
The success fee under a Conditional Fee Agreement (CFA) is capped at 25% of your past losses and general damages, and it cannot touch your future losses: that protection is set by the CFA Order 2013.
Under a CFA, you pay nothing upfront and nothing if the claim is unsuccessful. If the claim succeeds, the success fee is deducted from the damages you receive. It applies only to two heads: your past financial losses and your general damages. All future losses, including future care costs, future lost earnings, and future treatment costs, are paid to you in full.
To illustrate with a simplified example: if your general damages are £80,000 and your past financial losses are £20,000, the success fee cap applies to £100,000 combined. At 25%, the maximum deduction from those two heads is £25,000. If you also have future care costs of £400,000, that entire sum is protected and paid to you in full. Your net receipt from general damages and past losses would be £75,000, plus £400,000 in future losses: a total of £475,000.
After the event (ATE) insurance premiums, which cover the cost of expert reports and disbursements if the claim had failed, are also typically deducted from a successful award. Your solicitor must explain all of this in writing before you sign a CFA. For a full explanation of how the funding model works, the CFA funding guide on this site covers every element.
Other factors that shape your final compensation
Several factors beyond injury severity and financial loss can influence the final figure in a clinical negligence claim.
Contributory negligence (a finding that the claimant contributed to their own harm) is uncommon in clinical negligence cases but possible in limited circumstances. A significant failure to follow medical advice over a sustained period, for example, could lead to a percentage reduction in damages.
Interim payments are worth knowing about if your injuries are serious and liability is not genuinely in dispute. Under the Pre-Action Protocol, once liability is admitted or becomes clear from the evidence, your solicitor can apply for an interim payment: a lump sum on account of the final award. This is particularly relevant in catastrophic injury cases where care costs and adaptation needs are urgent. Waiting years for a final settlement while incurring significant costs is often unnecessary where liability is admitted early.
Structured settlements allow future losses to be paid as a series of annual payments rather than a single lump sum. This can benefit claimants with long-term care needs because payments continue for life, removing the risk that a lump sum is exhausted prematurely. Courts have the power to order periodical payments in appropriate cases.
Why compensation ranges vary so widely
Two people who suffered a delayed cancer diagnosis from the same type of GP failure can receive very different compensation figures. The same is true across every category of medical negligence claim.
The main variables are: the stage at which the correct diagnosis would have been made and whether earlier treatment would have produced a genuinely better outcome; the claimant's age and life expectancy; the effect on employment; the care regime required and its projected cost over a lifetime; and whether there are multiple injuries or complications from the same negligent act. On causation alone, two cases with identical breach facts can have opposite outcomes if the expert evidence on "what would have happened" points in different directions.
These variables are why a calculator cannot give you a reliable answer. Every figure cited online, including the figures on this page, is a framework. Your figure comes from applying that framework to your specific facts.
Why no medical negligence calculator can replace a specialist assessment
A free specialist assessment is the only way to get a realistic picture of what your claim might be worth. It costs nothing, it commits you to nothing, and it gives you concrete information: whether the facts support a claim, what the likely heads of compensation are, and what the process involves.
At AAA Solicitors, the initial assessment is free. If the facts suggest a viable claim, a specialist will advise on the evidence needed, the likely value range, and the funding arrangement. If the facts do not support a claim, they will tell you that too, clearly and without obligation. The Limitation Act 1980 gives most claimants three years from the negligent act or date of knowledge to bring a claim. Acting sooner rather than later keeps your options open and makes the evidence easier to gather.
You can check your claim using the online form right now, or call to speak with a specialist directly. There is no pressure and no commitment. The only cost of not calling is not knowing.