Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice.
Updated June 2026 · England & Wales
If a bank, insurer, lender, or investment firm has treated you unfairly and refuses to put things right, the Financial Ombudsman Service (FOS) offers a free, independent route to resolve the dispute without going to court. Thousands of people across the UK use it every year to challenge decisions on everything from mis-sold insurance to disputed bank charges.
The process can feel daunting if you have never done it before, particularly when the financial firm has pushed back or gone silent. This guide walks you through when the Ombudsman can step in, how to prepare a strong complaint, what the investigation looks like in practice, and what outcomes you can realistically expect.
It is written for consumers and small businesses who want a clear picture of the route ahead before committing time to the process.
Overview
The Financial Ombudsman Service is a statutory body set up under the Financial Services and Markets Act 2000 to settle individual disputes between consumers and financial businesses operating in the UK. It is funded by the financial industry through levies and case fees, but it operates independently of the firms it investigates and of the Financial Conduct Authority (FCA).
Using the service costs the consumer nothing. The Ombudsman looks at complaints about a wide range of regulated activities, including current accounts, credit cards, mortgages, loans, pensions, investments, insurance policies, payment protection, and consumer credit agreements. It can also consider complaints about poor service, errors, delays, and unfair treatment.
Decisions are made by assessing what is fair and reasonable in the individual circumstances, taking into account the law, regulator rules, industry codes, and good practice. If you accept a final decision from an Ombudsman, it becomes legally binding on the financial firm. If you reject it, you keep your right to take the matter to court instead.
Key steps
Complain to the firm first. Before the Ombudsman can get involved, you must give the financial business a chance to put things right. Put your complaint in writing, set out clearly what went wrong, explain the impact on you, and say what you want the firm to do. Keep a dated copy of everything you send.
Wait for the firm's response or the 8-week deadline. Regulated firms are generally required to issue a final response within 8 weeks. If they send a final response sooner and you disagree with it, you can escalate straight away. If 8 weeks pass without a proper answer, you can take the matter to the Ombudsman without waiting any longer.
Check eligibility and time limits. The Ombudsman can only look at complaints that fall within its jurisdiction. There are strict time limits, usually six months from the firm's final response and a longer backstop running from when you first knew of a problem. Check the current rules on the FOS website before you file.
Gather your evidence and build a timeline. Pull together statements, letters, emails, call notes, contracts, policy documents, and anything that shows what happened and when. A clear chronological timeline is often the single most useful thing you can prepare. Note down the financial loss or distress you have suffered and how you worked it out.
Submit the complaint and engage with the investigator. You can complain online, by post, or by phone. An investigator will review the file, ask both sides for information, and usually issue a view first. If either party disagrees, an Ombudsman will make a final decision, which becomes binding on the firm only if you accept it.
Q How much does it cost to complain to the Financial Ombudsman?
The service is free for consumers and eligible small businesses. You do not pay anything to submit a complaint, receive a decision, or have your case investigated. Case fees are charged to the financial firm, not to you. You do not need a solicitor or claims management company to use the service, and the Ombudsman has said repeatedly that bringing a complaint yourself does not put you at any disadvantage.
Q How long does a Financial Ombudsman complaint take?
Timescales vary significantly depending on the type of complaint, how complex the issues are, and how quickly both sides provide information. Straightforward cases may be resolved in a few months, while complex investment, pension, or mis-selling cases can take considerably longer. The Ombudsman publishes current waiting times on its website, and you can check the typical timeline for your category of complaint before deciding to proceed.
Q What can the Financial Ombudsman order a firm to do?
If the Ombudsman upholds your complaint, it can direct the firm to pay compensation for financial loss, refund charges, correct credit files, apologise, or take other practical steps to put you back in the position you would have been in. There is a maximum award limit that is updated periodically, so check the current cap on the FOS website. If your losses exceed the limit, you may still prefer to take court action.
Q Can I still go to court if I use the Ombudsman?
Yes, but only up to a point. If you reject the Ombudsman's final decision, you keep your right to sue the firm in court. If you accept the decision, it becomes legally binding and you generally cannot then pursue the same matter through litigation. Court proceedings carry cost risks that the Ombudsman route does not, so it is worth weighing both options carefully before accepting or rejecting a final decision.
Q What kinds of complaints does the Ombudsman not handle?
The service does not handle disputes that fall outside its jurisdiction, such as complaints about a firm's general commercial decisions (for example, deciding to withdraw a product), complaints that are out of time, or matters that belong with another regulator or scheme. Pensions disputes may fall to the Pensions Ombudsman instead. If you are unsure whether your issue is covered, the FOS helpline can confirm this before you submit anything.
Q Do I need to give the firm a deadlock letter before going to the Ombudsman?
A deadlock or final response letter from the firm allows you to refer the complaint to the Ombudsman straight away. However, you do not have to wait for one forever. If 8 weeks have passed since you first complained and the firm has not issued a final response, you can take the matter to the Ombudsman without a deadlock letter, as long as you are still within the overall time limits.
Q Can small businesses use the Financial Ombudsman Service?
Yes. Eligibility for small businesses, charities, and trusts is defined by turnover, employee numbers, and other thresholds set by the FCA. The rules have been widened over the years so that many more SMEs can now use the service instead of having to litigate. Check the current eligibility criteria on the FOS website before assuming your business qualifies, as the thresholds are updated from time to time.
Complaining to the Financial Ombudsman works best when you pitch it correctly, hit the time limits, and know what the service can realistically order. An experienced legal adviser can help you think through your situation based on what you describe on the call, so you know whether escalating is worthwhile before you invest the time.
✓Plain-English answers to your specific questions about the complaint process
✓Practical perspective on whether the Ombudsman route fits your circumstances
✓Guidance tailored to what you describe about the firm's response so far
✓A clearer sense of what to watch out for before you submit
Personal call · For information only · Independent advisers
Written & reviewed by
Brad Askew Solicitor (non-practising)
Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.