No Win No Fee Professional Negligence Claims, Explained
“No win no fee” is one of the most searched — and most misunderstood — phrases in legal services. Here is what it actually means when you bring a professional negligence claim, in plain English.
Last reviewed: August 2026
What no win no fee actually is
No win no fee is the everyday name for a conditional fee agreement, usually shortened to CFA. Under a CFA, your solicitor's fees are conditional on the claim succeeding. If the claim fails, you do not pay those fees. If it succeeds, the solicitor charges their base costs plus a success fee, which is normally deducted from your compensation.
The arrangement exists for a simple reason: most people cannot afford to fund a negligence claim out of their own pocket, and without CFAs, negligent professionals and their insurers would effectively be beyond challenge.
What you will pay if you win
Two deductions are typical from a successful claim. First, the success fee — an uplift on the solicitor's base costs, capped by law at 25% of certain heads of damages in most consumer cases. Second, any unrecovered costs or the premium of an after-the-event insurance policy, if one was taken out.
Every one of these figures must be set out in writing before you sign anything. If a firm will not tell you, in pounds and on one page, what a win at a given value would leave you with, walk away.
- Success fee: capped at 25% of relevant damages in most consumer claims
- After-the-event insurance premium, where a policy is taken out
- Any costs not recovered from the losing side
What you pay if you lose
On a genuine CFA, you do not pay your own solicitor's fees if the claim fails. The two things to check before signing are the other side's costs — which can become relevant if court proceedings are issued and defended — and disbursements such as expert report fees. After-the-event insurance exists specifically to cover the first of these risks, and a regulated firm must explain both points clearly.
Why honest firms assess first
Because the firm is only paid on success, a reputable practice will review your documents and give you a straight view on prospects before offering a CFA. That assessment should be free and carry no obligation.
Be cautious of any outfit that offers no win no fee instantly, without reading a single document — it usually means the business model depends on volume sign-ups rather than winning cases. Equally, if a firm declines your case, that honesty is worth something: it has saved you months of wasted effort.
What to check before you sign
Before entering any agreement, confirm five things in writing.
- The firm is authorised and regulated — check the SRA register at sra.org.uk
- The success fee percentage and exactly what it is calculated on
- Who pays the other side's costs if the claim fails, and whether insurance is in place
- Which disbursements you might ever be asked to fund
- A worked example showing what you would receive from a realistic settlement figure
Common questions
Do I pay anything upfront on a no win no fee claim?
Under a genuine conditional fee agreement, no. You should not be asked to pay legal fees upfront. If the claim succeeds, an agreed success fee is deducted from the compensation, subject to legal caps. If it does not succeed, you do not pay your solicitor's fees — though you should always check what the agreement says about disbursements and the other side's costs.
What is a success fee and how much is it?
A success fee is the additional amount a solicitor can charge if the claim wins, reflecting the risk they took by working without payment up front. It is calculated as a percentage of the base legal costs and is capped by law at 25% of certain damages in most consumer cases. The exact figure must be explained to you in writing before you sign.
Can every professional negligence claim be run no win no fee?
No. A reputable firm will only offer a conditional fee agreement where the claim has reasonable prospects of success, because the firm only gets paid if it wins. That is why an honest initial assessment matters: if a firm offers no win no fee without even reviewing your documents, treat that as a warning sign.
What happens if I lose?
If the claim is genuinely no win no fee, you do not pay your own solicitor's fees. The points to check in any agreement are whether you could be liable for the other side's costs after court proceedings are issued, and whether after-the-event insurance is recommended to cover that risk. A regulated firm must explain all of this before you commit.
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