How to Retain Customers and Get Repeat Business: Follow-Up, Reviews and Maintenance Agreements

Quick Answer: Repeat customers cost 6–10× less to acquire than new ones, and the average UK tradesperson generates 35–55% of annual revenue from returning customers and their referrals. Three practices drive most of the gain — a 30-day post-job follow-up, a structured review request via Trustpilot/Google, and an annual maintenance touch (boiler service, gutter clean, electrical safety check) that creates a calendar reason to be in the customer's life. Acquisition cost on a new £2,000 job is £150–£400 in marketing; the same revenue from a repeat customer costs £20–£50.

Summary

Customer acquisition is the most expensive line item on most tradespeople's books. A typical Google Ads cost-per-lead in plumbing or electrical work is £25–£80, and only 20–35% of leads convert, putting the acquisition cost per customer at £80–£300. A repeat customer who books directly costs the price of a phone call. The maths makes itself: spending an hour each week on follow-ups and review chasing is the highest-ROI marketing activity available to any sole trader or small firm.

This guide covers the four mechanisms that drive repeat business in UK trades — post-job follow-up sequence (30/90/365 day touches), structured review collection across Google Business Profile and Trustpilot, maintenance agreement design and pricing, and referral programme structure. Each section includes the practical tooling (free or low-cost), the typical conversion rates, and the specific failure modes that turn a follow-up into a complaint trigger rather than a repeat booking.

The single most expensive missed opportunity: customers who would have booked again but never heard from the tradesperson after the original job. Surveys consistently show 40–60% of customers in trade services would rebook the same firm "if asked at the right time" — but only 10–15% are actually asked. Building a 30-day follow-up routine into every job converts one of those customers into a repeat over the lifetime of the relationship; building a 365-day annual touch creates a recurring revenue stream that doesn't depend on marketing spend.

Key Facts

Quick Reference Table — Follow-up Sequence

Spending too long on quotes? squote turns a 2-minute voice recording into a professional quote.

Try squote free →
Touch Timing Channel Goal
Job completion Same day Verbal + invoice Confirm satisfaction, ask "anything else?"
First check-in 7 days WhatsApp/SMS "Just checking everything's working OK"
Review request 14–30 days Email or SMS Direct link to Google/Trustpilot review form
Quarterly seasonal 90 days Email or SMS Seasonal relevant message (winterise, spring check)
Annual reminder 365 days Phone or SMS Maintenance booking, anniversary check
Referral push 60–90 days Email "Know anyone who could use my help?"

Detailed Guidance

Same-day completion

The most powerful retention moment is the moment of job completion. Three things to do at the door:

  1. Walk through the work with the customer — point out what was done, what to know, any gotchas. Customers who understand the work value it more.
  2. Ask "is there anything else you've been meaning to get done?" — this single question generates 10–15% additional same-job revenue or follow-on bookings.
  3. Set the expectation for follow-up — "I'll text you in a week to make sure everything's still right." This makes the follow-up feel like service, not selling.

Hand over a written job summary or invoice that includes:

7-day check-in

A short text or WhatsApp message:

"Hi [Name], just checking the [boiler / new sockets / new tap] is working well? Any questions, just shout. — [Your name]"

Sent personally (not from a marketing platform) so it looks like a call from a real person. Conversion rate to "everything's fine" or to follow-up question is high (70%+). Customers who respond with a problem are recovered customers — you fix it before they leave a 1-star review.

14-30 day review request

The single most valuable marketing investment for a UK tradesperson is Google reviews. They show in Google Maps, in Google's "knowledge panel" for your business, and they directly affect ranking on local searches like "plumber near me".

The mechanics:

  1. Set up Google Business Profile — free, takes 30 minutes. Verify by postcard, phone, or email.
  2. Create a short review URL — Google generates one, but use a URL shortener (bit.ly, tiny.cc) for easier sharing
  3. Send the review request 14-30 days post-job — too soon and the customer hasn't formed a settled opinion; too late and they've forgotten

Template SMS or email:

"Hi [Name], thanks for choosing me for your [job type]. If you've got a minute, a Google review would mean a lot — it's how new customers find me. Here's the link: [bit.ly/yourshortlink]. — [Your name]"

Realistic conversion: 25–40% of customers who receive the request leave a review. Across a year of 100 jobs, that's 25–40 reviews — enough to push your local search ranking significantly.

Don't ask for a review at the door — ratings inflated by in-person pressure are statistically detectable to Google's algorithm and may be discounted. Wait for the natural touchpoint.

Don't offer payment or discounts for reviews — violates platform terms and Trading Standards rules; reviews can be removed and the business penalised.

Quarterly seasonal touches

Every 90 days, send a seasonally relevant message to past customers:

Use email marketing software (Mailchimp free tier handles up to 500 contacts). Don't use it like spam — short, helpful, no sales pressure beyond a clear "happy to help if you want anything done" close.

Annual reminder — the maintenance agreement structure

The most reliable repeat business mechanism is the annual maintenance touch. Every customer booked in for an annual service is locked into the relationship without any acquisition cost.

For different trades:

Trade Annual Service Typical Price Purpose
Heating engineer Boiler service £75–£140 Manufacturer warranty maintenance
Heating engineer System health-check + magnetic filter clean £80–£140 System longevity
Electrician EICR (where applicable) £150–£300 Statutory for landlords
Roofer Annual roof and gutter inspection £80–£200 Identifies issues early
Plumber Hot water cylinder service £85–£140 Annual inhibitor refresh
Painter/decorator External paint check £40–£120 Identifies repaint needs
Locksmith Lock and security check £60–£100 Insurance recommendation
Gas Safe (landlord) Annual safety check + cert £75–£120 Statutory requirement

Maintenance agreement structure:

A typical heating engineer with 200 boiler service customers paying £100/year generates £20,000 of recurring revenue with zero acquisition cost — and the customer becomes the natural first call for any boiler problem, repair, or replacement.

Review collection at scale

A simple system that works:

  1. Track jobs in a spreadsheet with customer email + job-completion date
  2. Set a reminder for day 14 post-completion — phone calendar will alert
  3. Send the review request via the customer's preferred channel
  4. Track responses — note who reviewed, who didn't
  5. Quarterly recap — add 4–8 reviews per month over 12 months = 48–96 reviews/year

For higher volume operations, CRM tools (ServiceM8, Tradify, Jobber) automate the review request as part of the job-completion workflow.

Referral programme — formalising what happens anyway

Most tradespeople get referrals already, informally. A structured referral programme increases the rate by 30–60%.

Typical structure:

The mechanics matter more than the cash value — most customers refer because they want to help, not because they want £25. The £25 is a thank-you, not an incentive that drives behaviour.

Bad reviews — how to recover

Negative reviews happen. The recovery is more important than the avoidance:

  1. Respond within 24 hours — public, professional, brief
  2. Acknowledge the issue — "I'm sorry that didn't go to plan"
  3. Offer to make it right — "Please give me a call on [number] so I can fix this"
  4. Don't argue publicly — readers form their judgement from your tone, not the dispute
  5. Once resolved offline, ask the customer to update the review — many will, and "X resolved this professionally" recovery reviews carry as much weight as the original complaint

A pattern of professional responses to occasional bad reviews can build trust more than uniformly perfect reviews — readers know perfection isn't real.

Tools and budget

Realistic monthly tooling cost for a sole trader:

Total realistic monthly investment: £0–£75. Compared to monthly Google Ads spend (often £200–£800 for trades), the ROI on retention is much higher.

For homeowners — what should I expect from a good tradesperson?

Signs of a tradesperson who values customer relationships:

Signs to avoid:

A maintenance agreement is genuinely valuable — but only if the price is fair (£80–£140/year for a boiler service is the market rate; £200+ is a markup) and the inclusions are clearly written.

Frequently Asked Questions

How many touches should I have with a customer per year?

For a one-off transactional customer: 4 touches in year 1 (completion, 7-day, review, quarterly), then 2–3 per year. For a maintenance agreement customer: 6–10 touches per year (service appointment, pre-service reminder, post-service follow-up, seasonal touches). Don't over-touch — customers unsubscribe from email and block from SMS if you become noise.

What if a customer doesn't want to be contacted?

Honour it immediately. Mark them in your records as "no marketing", remove them from any email lists, don't text them. The legal position under GDPR and PECR (Privacy and Electronic Communications Regulations) requires consent for marketing communications and an easy opt-out. The reputational damage from spamming is much higher than the lost sales from respecting opt-outs.

How do I avoid sounding like a salesperson when following up?

Make the message about them, not you:

The follow-up should sound like a friend remembering, not a corporation marketing.

Should I use SMS or email for follow-ups?

Email for substantive content (newsletters, seasonal tips, maintenance agreements). SMS or WhatsApp for short transactional touches (7-day check-in, review request, appointment confirmation). Match the channel to the customer's preference — most under-50s prefer SMS/WhatsApp; some over-65s prefer phone or email.

Are review platforms like Trustpilot worth paying for?

Trustpilot Pro starts at £159/month. For sole traders and small firms, it's usually overkill — Google Business Profile reviews (free) carry more weight in local search. Consider Trustpilot Pro if you're scaling to multi-van operations or competing on national-level search terms.

Regulations & Standards