The eight deposit red flags
First, deposit over 10% of contract value before site start — indicates the contractor lacks working capital. Second, cash-only or VAT-free payment — typically signals undeclared trading and uninsured operation. Third, no written contract — without a signed contract, you have minimal legal protection. Fourth, pressure to pay immediately — legitimate builders don't urgency-sell. Fifth, payment to a personal bank account rather than a business account — separates the money from any business asset base. Sixth, no invoice or receipt issued — leaves no paper trail for VAT, tax or dispute purposes. Seventh, requested cheque made out to an individual not the company. Eighth, deposit demanded before insurance and accreditation documents have been provided.
Why high deposits are dangerous
Deposits over 10% concentrate your financial risk in a single payment before any verifiable work. Construction industry insolvency rates in London have climbed sharply since 2023, and small builder bankruptcies typically leave depositors as unsecured creditors at the bottom of the recovery list. A 30% deposit on a £60,000 project (£18,000) becomes unrecoverable if the builder fails before site start — recoveries through insolvency are usually 1–5 pence in the pound. The Federation of Master Builders and Trading Standards both recommend deposits of 10% or less before work begins, with subsequent payments milestone-based against verifiable progress.
Safe payment structures
Best practice for a £60,000 home renovation: 5–10% deposit on contract signing (£3,000–£6,000), 25% on weathertight or strip-out complete (£15,000), 25% on first-fix complete and inspected (£15,000), 25% on second-fix complete (£15,000), 10% on practical completion and handover (£6,000), 5% retention held for 6 months against snagging defects (£3,000). Each stage payment is triggered by a verifiable milestone with optional QS sign-off. This structure means you've never paid for work not yet done, and you have 5% leverage to ensure snags are resolved. Builderr operates exactly this payment structure as standard.
How to verify a payment account
Before paying any deposit, verify the receiving account belongs to the company you're contracting with. Three checks: (1) confirm the account name matches the registered company name at Companies House — not a director's personal name; (2) verify the company is VAT registered if the invoice charges VAT (check the VAT number at HMRC's online VAT checker); (3) request the bank's confirmation of payee letter or proof. Modern UK banking includes Confirmation of Payee (CoP) which warns if the account name doesn't match — never ignore a CoP mismatch warning. Send an initial £1 test payment if uncertain, then call the builder to confirm receipt before sending the full deposit.
What to do if you suspect fraud
Three immediate steps. First, stop all payments — do not send any further money. Second, report to Action Fraud (the UK's national fraud reporting centre) at actionfraud.police.uk and obtain a crime reference number. Third, contact your bank within 24 hours of the suspected fraudulent payment — under the Contingent Reimbursement Model code, most UK banks will refund authorised push payment (APP) fraud if you reported promptly. Also report to Trading Standards via 0808 223 1133 and to TrustMark if the contractor holds accreditation. Document all communications and store evidence. Builderr publishes verified company details (registered name, number, VAT, accreditations) on every quote.
