Complaint Letter Builder
Generate a structured formal complaint letter addressed to a trader, employer, landlord, public body, or regulator — with the correct escalation path and outcome requested.
Calculator — accuracy depends on current rates
This calculator uses the rules and figures published on the dates shown. Rates, thresholds, and fees change — always verify the current figure on the official government website before paying or filing. The output is not legal advice.
Rates current as of: .
Privacy: runs entirely in your browser. Nothing you enter is sent to us or saved.
When to use this tool
Use when you need to make a formal written complaint and want to ensure it covers all the legally relevant points. A clear letter setting out the facts, legal basis, and remedy sought is the first step before escalating to an ombudsman, regulator, or court. Most ombudsmen require evidence of a deadlocked or ignored complaint before accepting a referral.
Complaint Letter Builder
Next steps
Read the full guide
- Consumer Rights Act 2015: Refunds, Repairs and Getting Your Money BackConsumer Rights Act 2015: the 30-day refund right, repair or replacement, digital content and services rules, plus Section 75 and chargeback.
- Small Claims Track: Procedure, Fees and CostsSmall claims track guide: the £10,000 limit, current fees, directions, informal hearings, the limited-costs rule and how to appeal on form N164.