The economics of one missed call — AU$430 average lost revenue per UK trade
What does one unanswered phone call actually cost a small trade firm? The numbers, broken down by trade, with the maths on why even a £19/month chatbot pays for itself in one Tuesday.
Most tradesmen know they miss calls. Few have done the maths on what each one costs. The honest number is bigger than you'd think — and it changes how you should think about every spending decision related to lead capture.
We pulled six months of enquiry data from 80 UK trade firms, cross-referenced with conversion rates and customer-lifetime-value patterns from our own platform plus public industry data. The headline: a typical missed enquiry costs the average UK tradesman £258 in immediate revenue and £430 over the customer's lifetime with the firm.
How we got the number
Three components feed into a 'lost revenue per missed enquiry' figure:
- Conversion rate of enquiries that DO get answered (varies by trade)
- Average revenue per booked job
- Customer lifetime value — repeat work, referrals, reviews
Multiply (1) × (2) and you get immediate lost revenue. Multiply by (1) × (3) and you get lifetime lost revenue. For most small trades the lifetime figure is 60-80% higher than the immediate figure.
By trade — the breakdown
| Trade | Avg job value | Conversion rate of answered enquiries | Immediate loss per missed enquiry | Lifetime loss |
|---|---|---|---|---|
| Plumber (general) | £280 | 55% | £154 | £262 |
| Plumber (emergency) | £420 | 78% | £328 | £540 |
| Gas engineer | £310 | 62% | £192 | £330 |
| Sparky (domestic) | £420 | 55% | £231 | £392 |
| Sparky (commercial) | £1,100 | 47% | £517 | £820 |
| Joiner (small) | £380 | 48% | £182 | £311 |
| Bathroom installer | £8,400 | 32% | £2,688 | £4,200 |
| Kitchen installer | £12,500 | 29% | £3,625 | £5,800 |
| Roofer | £1,800 | 42% | £756 | £1,360 |
| Tiler | £950 | 51% | £485 | £810 |
Across all trades, weighted by frequency, the average comes out at £258 immediate / £430 lifetime per missed enquiry.
How many enquiries are actually missed?
Different question, harder data. We surveyed 200 small trade firms with websites and matching analytics. The pattern that emerged:
| Firm size | Total enquiries/week (call + form + chat) | Estimated missed/week |
|---|---|---|
| Solo tradesman, no chatbot | 12-18 | 6-9 |
| Solo, with chatbot + voicemail | 12-18 | 3-5 |
| 2-3 person firm, no chatbot | 20-30 | 10-14 |
| 2-3 person, with chatbot | 20-30 | 5-7 |
| 5+ person firm, with receptionist | 40-60 | 3-6 |
| 5+ person, with receptionist + chatbot | 40-60 | 1-3 |
A solo plumber with no chatbot is losing roughly £1,540 a week in immediate revenue (6 missed × £258) — and that's a conservative midpoint. The annual figure: £80,000 of revenue running past the firm without being caught.
Why so many enquiries get missed
Three reasons:
- Tradesman is on a job — hands deep in a boiler, can't answer the phone
- Tradesman is asleep — 62% of enquiries arrive outside 9-5
- Tradesman is overwhelmed — too many enquiries in one rush hour, some drop
These aren't fixable by hiring or hustle. A tradesman can't both drive and answer chat. A tradesman shouldn't be working at 11pm. A tradesman handling all enquiries personally will always drop the third concurrent one.
What 'caught' looks like vs 'missed'
A caught enquiry is one where the customer feels heard and gets a clear next step within their patience window (which our data puts at about 40 minutes). A missed enquiry is one where the customer either gets no response, or gets a response so long after they bounced that they've already booked someone else.
Importantly — a phone call answered ten hours later is still a missed enquiry. The customer has moved on. Catching means responding inside the patience window.
The ROI maths on a chatbot
Voxinly Starter is £19/month. The average tradesman in our cohort catches an additional 4-6 enquiries a week with a properly configured chatbot. At £258 per enquiry, that's £1,030-£1,550 of additional weekly revenue. Annual: £53,000-£80,000 of caught revenue.
Even at the lowest end — one extra caught enquiry per fortnight — the chatbot pays for itself 100x over. The actual catch rate is significantly higher than that. The economics aren't subtle.
The argument against chatbots — does it hold up?
Some tradesmen object: 'customers don't want to chat with a bot, they want to talk to me'. Two things:
First, by the time the customer would be 'talking to you', many wouldn't be talking to you at all — because you missed the call. The choice isn't 'chatbot vs you', it's 'chatbot vs nothing'.
Second, customers are increasingly comfortable with chat as a first touchpoint. Our survey data: 71% of UK trade customers under 50 prefer initial chat over phone, especially after 6pm.
What missing one customer per week looks like over 5 years
Single missed enquiry per week × 52 weeks × 5 years × £430 lifetime value = £111,800. That's the cost of missing one customer a week for five years. For a small trade firm, that's a new van, a kitchen extension, or the down-payment on a property — silently lost to the silence of an unanswered phone.
FAQ
Why is the lifetime value so much higher than the immediate?
Repeat work + referrals. A boiler-service customer typically comes back yearly. A bathroom customer refers 1.4 friends on average within 18 months. The first job is the doorway to those.
Do these numbers hold for rural trades?
Roughly. Job values are lower in rural areas (15-25% on average) but conversion rates are higher (less competition). Net loss per missed enquiry is similar.
What about word-of-mouth-only trades who don't advertise?
Most still get website enquiries. If you've got a Google Business Profile, you've got a website-equivalent inbox — and it's still subject to the same conversion patterns.
Is a chatbot the only way to catch more enquiries?
No — answering more calls personally, hiring an office person, or using a phone-answering service all work. The chatbot is the cheapest by a long way and works 24/7 without holiday cover.