TL Time limits
The clock decides more cases than the merits do.
Most people lose not because their complaint was weak but because they found out about the deadlines too late. This page sets out each one, with the rule behind it and where it comes from.
| Route | What the rule says | The clock starts |
|---|---|---|
| Firm complaint | You normally need to complain within 6 years of the problem happening or, if later, within 3 years of becoming aware that you had cause to complain. | The problem itself, or the date you became aware of it |
| Firm’s response | Firms must normally give you their final response in writing within 8 weeks of your complaint. | The date of your complaint |
| Financial Ombudsman Service | You need to contact the Financial Ombudsman Service within 6 months of receiving the firm’s final response, or it may not be able to help. | The date of the firm’s final response |
| FSCS | There is no single universal deadline: eligibility depends on when the firm failed and what you could reasonably have known. FSCS publishes the position for each failed firm. | Depends on the firm and the failure — check FSCS guidance for that firm |
| Court — negligence | For negligence claims where the facts were not known at the outset, the limitation period is six years from the date the cause of action accrued, or three years from the date of knowledge — whichever expires later. | The cause of action, or the date of knowledge |
| Court — the longstop | There is an overriding fifteen-year longstop running from the act or omission alleged to constitute the negligence, which bars the claim even if the three-year knowledge period has not yet started to run. | The act or omission complained of |
| Court — FCA rule breach | Under section 138D of the Financial Services and Markets Act 2000, a contravention by an authorised person of a rule made by the FCA is actionable at the suit of a private person who suffers loss as a result, subject to the defences that apply to actions for breach of statutory duty. Limitation is generally the same as for negligence, but take advice on your own facts. | The loss caused by the breach |
01 In sequence
What happens when.
The sequence below is the shape of a typical investment complaint. The two things that catch people are the six-month window after a final response and the fact that court time keeps running while you wait.
Day 0
You discover the problem
This is often the date that matters most, because the three-year “date of knowledge” period runs from it. If you could not reasonably have known earlier, say why — and keep the document or letter that told you.
Within 6 years, or 3 years of awareness
Complain to the firm
The FCA’s stated position is that you normally need to complain within 6 years of the problem happening, or within 3 years of becoming aware that you had cause to complain, if that is later.
Within 8 weeks
The firm’s final response
Firms must normally give you a final response in writing within 8 weeks of your complaint. If you do not receive one, you can go to the Ombudsman without waiting further.
Within 6 months
Refer to the Financial Ombudsman Service
You need to contact the Ombudsman within 6 months of receiving the firm’s final response, or it may not be able to help. This is the deadline that catches the most people.
While that runs
Court limitation keeps running
The Ombudsman’s process does not pause the clock for a court claim. If a court claim is a realistic possibility, take advice on the dates before you accept any final decision.
6 years, or 3 from knowledge
Issue a court claim
For negligence, the period is 6 years from the date the cause of action accrued, or 3 years from the date of knowledge — whichever expires later.
15 years
The longstop bars everything
A 15-year longstop runs from the act or omission alleged to constitute the negligence. It bars the claim even if the three-year knowledge period has not yet started to run.
02 Practical steps
Five things to do this week.
- Write down every date you know: when you were sold it, when you realised, and when you last complained
- Put the complaint in writing, even if the deadline looks comfortable
- Diarise the date of the firm’s final response, and six months after it
- Ask the firm for the advice file in the same letter
- If your last advice was years ago, take advice on the longstop now rather than later
The one to remember
Six months from the firm’s final response to contact the Financial Ombudsman Service. It is short, it is absolute, and it is the deadline people most often miss.
03 Questions
About the deadlines.
How long do I have to make a claim?
What is the “date of knowledge”?
What is the 15-year longstop?
Does complaining to the firm or the Ombudsman pause the court clock?
Can the Ombudsman look at something outside the court time limits?
What is the deadline for FSCS?
Do the deadlines apply to a claim by an estate?
What should I do if a deadline is close?
Sources
Every rule, limit and deadline on this page comes from the official sources below. Each was read on the date shown. Where we could not verify a rule against the official text, we have left a visible instruction to confirm it rather than describing it from memory.
Financial Conduct Authority
Checked 12 October 2026 — The complaint process, the eight-week final response and the six-month window to go to the Ombudsman.
Understanding compensation for financial loss
Financial Ombudsman Service
Checked 12 October 2026 — Award limits for cases referred to the Ombudsman, and how compensation and interest are worked out.
Financial Services Compensation Scheme
Checked 12 October 2026 — Investment compensation limits per eligible person per firm, and what FSCS cannot cover.
FSCS compensation rules and eligibility
Financial Services Compensation Scheme
Checked 12 October 2026 — The conditions that must all be met before FSCS can pay a claim.
Limitation Act 1980, section 14A — special time limit for negligence actions
legislation.gov.uk (The National Archives)
Checked 12 October 2026 — Six years from the cause of action, or three years from the date of knowledge if that is later.
Limitation Act 1980, section 14B — overriding fifteen-year time limit
legislation.gov.uk (The National Archives)
Checked 12 October 2026 — The absolute fifteen-year longstop for negligence claims that do not involve personal injury.
Financial Services and Markets Act 2000, section 138D — Actions for damages
legislation.gov.uk (The National Archives)
Checked 12 October 2026 — The statutory right of a private person to sue for loss caused by a firm’s breach of an FCA rule.