10 Red Flags to Watch For When Hiring a Tradesperson in the UK
Most UK tradespeople are honest, skilled and worth the money. The minority who aren't tend to share a recognisable pattern — and almost every rogue-trader case Trading Standards investigates has at least three of these red flags before the work even started. Learn the patterns and you'll dodge most of the bad ones.
1. Cash-only deals (or insistence on cash discount)
There are legitimate reasons a tradesperson might prefer bank transfer over card — fees, payment delays, the hassle of card terminals. But insistence on cash, especially with a 'cash discount', usually means no VAT, no receipt, no warranty and no paper trail if the work is faulty.
What to do instead: Pay by bank transfer (BACS) for a clear paper trail, or by debit/credit card for Section 75 protection on jobs over £100.
2. No written quote
Verbal quotes are not enforceable. A tradesperson who won't put a price in writing — even via WhatsApp or email — is keeping their options open to charge more later. Every legitimate UK tradesperson can produce a written quote.
What to do instead: Ask for an itemised written quote — labour, materials, VAT, payment schedule, timeline. If they refuse, end the conversation.
3. Large up-front deposits
A tradesperson asking for 50%+ up front for materials 'because they have to buy them today' is the single most common rogue-trader pattern. Once paid, they often disappear or stretch the job out for months. Genuine tradespeople buy materials on trade credit and don't need a homeowner's cash to start.
What to do instead: For jobs under £500, no deposit. For £500–£2,000, 10–20% on the day work starts. For larger jobs, stage payments tied to milestones (first fix complete, second fix complete, sign-off).
4. Vague start dates and timelines
'Should be done in a couple of weeks' is not a timeline. Genuine tradespeople know their diary and can give you specific dates. Vague timelines often mean the pro is overbooked, planning to subcontract, or not actually serious about the job.
What to do instead: Ask for a specific start date, expected duration in working days, and a finish date. If they can't commit, find someone who can.
5. Missing or invented trade certifications
'Gas Safe registered' that doesn't appear on the Gas Safe finder. 'CORGI registered' (CORGI ended in 2009 — anyone still claiming this is dishonest or out of date). 'Part P qualified' but no NICEIC / NAPIT / ELECSA / STROMA registration. All red flags.
What to do instead: Verify on the official register for the relevant trade. Genuine pros come up immediately by name or business.
6. Cold-callers and door-to-door sales
Anyone knocking your door uninvited claiming to have 'spotted damaged tiles from the road' or 'leftover tarmac from a job nearby' is running a known scam. Trading Standards data consistently shows door-to-door cold-callers are vastly more likely to overcharge or do poor work.
What to do instead: Never agree to anything on the doorstep. If you'd genuinely like a quote, take their card and check them properly first — but it's almost always better to start fresh with a verified marketplace pro.
7. No verifiable business address
A mobile number and a generic Gmail address aren't enough. Legitimate businesses have an address — even if it's a residential one — that you can verify. No address means no recourse if something goes wrong.
What to do instead: Search Companies House if they're a limited company. Check the address on Google Maps. Cross-reference against any reviews or platform profiles.
8. Quotes far below market
If you've got three quotes at £4,200, £4,400 and £2,800, the cheapest is almost always missing something. Common omissions: materials below spec, no certification fees, no VAT included, no warranty, sub-contracted to inexperienced hands.
What to do instead: Ask the cheap quote what's included, line-by-line, vs the others. If they can't explain the gap honestly, it's a phantom price they intend to top up later.
9. No references or evasive about reviews
A tradesperson who can't give you two recent customer references for similar work either hasn't done the work, or has burned bridges with previous customers. Either way, they're not the one for your job.
What to do instead: Always ask for two recent references and call them. Real referees pick up the phone and have specific things to say about the job.
10. High-pressure 'decide today' tactics
'Special price if you sign now,' 'this offer disappears tomorrow,' 'I've got a slot Tuesday but only if you commit today' — all designed to stop you getting other quotes or thinking it through. No legitimate UK trade discount disappears overnight.
What to do instead: Take 24 hours minimum. If a price truly disappears in 24 hours, the price was never real.
What to do if you spot the red flags after work has started
- Stop further payments immediately. Don't authorise more cash until issues are resolved.
- Document everything. Photos, dates, copies of texts and receipts.
- Put concerns in writing. Email or text — keeps an evidential trail.
- Contact your local Trading Standards via Citizens Advice consumer helpline on 0808 223 1133.
- Reverse the charge if you paid by credit card. Section 75 of the Consumer Credit Act covers most jobs over £100 paid by credit card.
- For licensed trades (gas, electrical), report to the relevant body — Gas Safe Register, NICEIC etc.
Frequently asked questions
What is the most common UK tradesperson scam?
The most common pattern is a cold-caller (door-to-door or phone), claiming to have spotted urgent damage, demanding a large up-front deposit for materials, then either disappearing or doing substandard work. Trading Standards data consistently shows this combination accounts for the majority of UK rogue-trader cases.
Should I ever pay a tradesperson in cash?
For small jobs under £100, cash is fine. For anything larger, bank transfer or card payment is much safer — you have a paper trail and Section 75 credit card protection on jobs over £100. 'Cash discount' offers usually mean no VAT, no warranty, and no recourse.
How do I report a rogue tradesperson in the UK?
Contact the Citizens Advice consumer helpline on 0808 223 1133, who will refer the case to your local Trading Standards. For licensed trades (gas, electrical), report to the relevant register — Gas Safe Register, NICEIC, NAPIT etc. If you paid by credit card, also contact your card issuer for a Section 75 chargeback.
Is it OK to pay a tradesperson 50% deposit?
Not for most jobs. For under £500, no deposit. For £500–£2,000, 10–20% is reasonable. Above £2,000, stage payments tied to milestones are standard (e.g. 25% deposit / 25% mid / 40% completion / 10% retention for 30 days). Insistence on 50% up front before any work has begun is a major red flag.
How do I know if a tradesperson's reviews are real?
Look for: photos accompanying reviews, specific job details (not generic praise), recent dates, and verification by the platform against a real booking record. Marketplaces like AllSorted, MyBuilder and Checkatrade tie reviews to actual bookings. Standalone Google or Trustpilot reviews are easier to fake.
Can I get my money back if a tradesperson does bad work?
Yes — UK consumer law (Consumer Rights Act 2015) entitles you to a repeat performance, price reduction or refund for poor workmanship. Section 75 of the Consumer Credit Act covers credit card payments over £100. Jobs booked through marketplaces typically also have platform-level dispute resolution.
About the author
AllSorted Editorial Team
Home services research & UK trades industry analysis
The AllSorted Editorial Team works with verified UK tradespeople, plumbers, electricians and home services professionals to publish accurate, up-to-date guidance for British homeowners. Editorial standards are reviewed against guidance from the Federation of Master Builders, NICEIC, Gas Safe Register and Trading Standards.