Banking
Ombudsman Services UK — How to Make Complaints That Work
Complete guide to UK ombudsman services. When and how to complain, which ombudsman handles what, and getting the resolution you deserve.
24 March 2026
·
4 min read
Ombudsman services can get your complaints resolved when companies won’t help. Here’s how to use them.
Understanding Ombudsman Services
What Ombudsmen Do
Function
Details
Investigate complaints
Independent review
Make decisions
Often binding
Award compensation
Up to sector limits
Free to use
No cost to complainant
Key Principles
Principle
Meaning
Independent
Not employed by companies
Impartial
Look at facts fairly
Final
Usually binding on company
Free
No charge to you
When to Use
Use Ombudsman When
Don’t Use When
Company won’t resolve
Haven’t complained to company
Reached deadlock
Issue is trivial
No response after 8 weeks
Purely contractual dispute
Unhappy with final response
Legal action started
Main UK Ombudsman Services
Financial Ombudsman Service (FOS)
Coverage
Details
Banks
Complaints about accounts, loans
Insurance
Claims disputes, mis-selling
Investments
Advice, platform issues
Pensions
Complaints about providers
Credit
Credit cards, loans
Mortgages
Lending issues
| Award limit | £430,000 (from April 2024) |
| Contact | financial-ombudsman.org.uk |
| Phone | 0800 023 4567 |
Energy Ombudsman
Coverage
Details
Gas suppliers
Billing, complaints
Electricity suppliers
Service issues
Network operators
Connection problems
| Contact | energyombudsman.org |
| Phone | 0330 440 1624 |
Communications Ombudsman
Provider’s Scheme
Covers
CISAS
Some telecoms providers
Ombudsman Services: Communications
Other providers
Coverage
Details
Mobile phones
Billing, contracts
Broadband
Service, faults
Landlines
Issues with service
Other Ombudsmen
Ombudsman
Covers
Local Government
Councils, social care
Housing
Social housing
Legal
Solicitors, legal services
Parliamentary
Government departments
Motor
Motor finance (new)
Property
Estate agents, lettings
The Complaints Process
Step 1: Complain to Company First
Requirement
Details
Always first step
Ombudsman won’t accept otherwise
In writing
Email or letter
Give time to respond
Usually 8 weeks
Request final response
If not resolved
Step 2: Get Deadlock Letter
Scenario
What Happens
Company sends final response
Can go to ombudsman immediately
8 weeks pass without resolution
Can go to ombudsman
Deadlock agreed
Both parties agree no resolution
What to Provide
Why Needed
Your complaint
Clear summary
Company response
Final response letter
Evidence
Statements, screenshots, correspondence
What you want
Resolution sought
Step 4: Investigation
Stage
What Happens
Assessment
Is complaint valid?
Opinion
Initial view shared
Challenges
Both sides can respond
Final decision
Binding on company
Financial Ombudsman in Detail
Time Limits
Type
Deadline
From final response
6 months
From when you knew
6 years
From event
3 years (if knew about it)
What They Can Award
Type
Details
Financial loss
Put you back in position
Distress & inconvenience
For stress caused
Consequential losses
Related costs
Maximum
£430,000
Success Rates
Year
Complaints Upheld
Typical rate
30-40%
PPI complaints
Higher historically
Bank complaints
Around 35%
Insurance
Around 40%
Tips for FOS Complaints
Do
Don’t
Focus on facts
Be emotional
Show financial loss
Exaggerate
Provide evidence
Expect automatic win
Explain impact
Skip the company stage
Energy Ombudsman in Detail
When to Use
Complaint Type
Examples
Billing errors
Wrong charges
Switching problems
Delayed, botched
Customer service
Poor treatment
Debt collection
Unreasonable pursuit
Prepayment issues
Smart meter problems
Process
Stage
Timeline
Accept complaint
Within days
Investigate
1-3 months
Decision
Binding
Possible Outcomes
Outcome
Details
Financial award
For losses
Practical remedy
Fix the problem
Apology
Required from company
Goodwill
Extra payment
Making Effective Complaints
Prepare Your Case
Element
Include
Timeline
What happened when
Evidence
Documents, screenshots
Financial impact
Actual losses
Emotional impact
If significant
Desired outcome
What would resolve this
Writing Your Complaint
Section
Content
Introduction
What complaint is about
Background
Brief relevant history
Problem
What went wrong
Impact
How it affected you
Resolution sought
What you want
Evidence list
What you’re providing
Common Mistakes
Mistake
Why It Hurts
Too emotional
Focus on facts
No evidence
Harder to prove
Unclear outcome
What do you actually want?
Exaggeration
Undermines credibility
Wrong ombudsman
Check coverage first
If You’re Unhappy with Decision
Options
Option
Details
Accept decision
Usually binding on company
Reject decision
Can pursue legally instead
Ask for review
Limited circumstances
Judicial review
Extremely rare, process errors only
Appeals (Limited)
Grounds
Details
New evidence
Not previously available
Process error
Ombudsman made mistake
Bias
Very rare
Alternative Options
If Ombudsman Can’t Help
Alternative
When to Use
Small claims court
Contractual disputes
Trading Standards
Criminal offences
Regulator
Systemic issues
Media
As last resort
Small Claims vs Ombudsman
Small Claims
Ombudsman
Binding judgment
Usually binding
Costs involved
Free
You must pursue
They investigate
Court process
Informal
Summary: Ombudsman Complaint Checklist
Check
Done
Complained to company first
☐
Given 8 weeks or got final response
☐
Identified correct ombudsman
☐
Gathered evidence
☐
Within time limits
☐
Your Complaint Should Include
Element
Done
Clear summary of issue
☐
Timeline of events
☐
Evidence attached
☐
Company correspondence
☐
Financial loss calculated
☐
Desired outcome stated
☐
Service
Contact
Financial
financial-ombudsman.org.uk
Energy
energyombudsman.org
Communications
Check provider’s scheme
Local Government
lgo.org.uk
Property
tpos.co.uk
Ombudsmen are powerful allies when complaints go wrong. But you must complain to the company first and give them fair chance to respond. Once you reach ombudsman stage, present clear facts and evidence for the best chance of success.