The 8 KPIs Every UK Trade Business Should Track in 2026

Most trade businesses are run on gut feel — the owner knows roughly whether things are going well based on how busy they are and whether there is money in the account. That works up to a point. But when you are managing a team, running multiple jobs, and spending money on marketing, gut feel is not enough. The businesses that grow profitably track a small number of key performance indicators (KPIs) consistently and use them to make better decisions. Here are the eight metrics that matter most for UK trade businesses in 2026.

1. Revenue per engineer (per day)

Revenue per engineer measures how much billable revenue each field worker generates per working day. It is one of the most direct indicators of whether your pricing, scheduling, and job mix are working together correctly.

To calculate it: take total revenue over a period, divide by the number of engineers, divide by the number of working days in that period. A heating engineer doing boiler installations should be generating considerably more per day than one doing annual services — which is fine, but you need to know the split. If revenue per engineer is declining, it usually means one of three things: you are taking on lower-value work, travel time between jobs is increasing, or engineers are spending too long on unprofitable jobs.

A useful benchmark for a plumber or heating engineer in the UK: revenue per engineer per day of £450–£700 is typical for a mix of service and installation work. Installation-focused businesses with good materials margins often see £700–£1,200.

2. Job completion rate

Job completion rate is the percentage of scheduled jobs that are completed as planned in a given period. It is calculated as: (jobs completed / jobs scheduled) x 100. A rate below 85% signals a problem — either with scheduling (jobs are being booked that cannot realistically be completed), with cancellations (customers or engineers), or with repeat visits needed because jobs cannot be finished on the first visit.

Track completion rate separately from cancellation rate. A job that the customer cancels 24 hours before is a different problem from a job where the engineer cannot complete the work because a part is not available. Both lower your completion rate but require different interventions.

Target completion rates for well-run trade businesses: 90–95% for planned maintenance and service work, 80–90% for reactive work (where access and diagnosis issues are harder to predict). If you are below these benchmarks, start by analysing the reasons for each incomplete job.

3. Average invoice value

Average invoice value (AIV) is total invoiced revenue divided by the number of invoices raised in a period. It tells you whether your job mix is moving in the right direction. Most trade businesses want AIV to rise over time, because higher-value jobs generate more revenue per unit of labour and overhead.

Track AIV monthly and look for trends. If it falls, investigate why: are you taking on more reactive small jobs (often lower margin), have prices increased but volume dropped, or are engineers underquoting on parts and materials? If AIV rises, understand what is driving it — a shift toward installation work, better upselling, or more commercial clients.

AIV should also be segmented by job type and engineer. An engineer whose AIV consistently runs below the team average may need coaching on upselling or may be systematically being allocated lower-value work. The data tells you which.

4. Quote-to-job conversion rate

Conversion rate is the percentage of quotes that result in a booked job. Calculate it as: (jobs booked from quotes / quotes submitted) x 100. The right target depends on your trade and how you generate leads — inbound enquiries should convert at 40–60%, cold tender submissions considerably less.

A consistently low conversion rate (below 30% on inbound leads) usually means one of four things: your prices are materially above competitors, your quote presentation is poor, you are not following up effectively, or you are quoting work you are not well-placed to win. Investigate which by asking lost-quote customers why they chose another builder, and by reviewing your follow-up process.

Track conversion rate by lead source. If referral leads convert at 65% but Google Ads leads convert at 25%, your Ads targeting or landing page may be attracting the wrong type of enquiry — or you may need to improve your follow-up speed for inbound digital leads (where the customer is likely contacting three or four businesses simultaneously).

5. Customer retention rate

Customer retention measures the percentage of customers from a given period who book again within a defined timeframe — typically 12 or 24 months. For trades with natural repeat work (boiler servicing, electrical testing, maintenance contracts), retention is a direct measure of customer satisfaction and relationship quality. For trades with longer purchase cycles (extensions, bathroom renovations), it measures referral potential more than repeat booking.

Improving retention by even 5–10 percentage points has a disproportionate effect on revenue, because retained customers cost nothing to acquire. The levers are: proactive service reminders (annual boiler service, CP12 renewal, PAT testing due), follow-up calls after job completion to ensure satisfaction, and being easy to contact when something goes wrong.

A retention rate below 30% for service-based trades suggests customers are not receiving reminders when their next service is due, or that the customer experience is not strong enough to generate word-of-mouth loyalty. Trade2Base's customer database lets you filter by last service date and send targeted follow-up campaigns to lapsed customers.

6. Marketing campaign ROI

Campaign ROI measures whether the money you are spending on marketing is generating profitable work. The formula is: (revenue from campaign − campaign cost) / campaign cost x 100. To calculate it, you need to know which jobs came from which marketing channel — which is why capturing lead source on every enquiry is essential.

Most trade businesses spend marketing budget across three to five channels simultaneously (Google Ads, leaflets, Checkatrade, social media, referral scheme) without knowing which channels are generating the most profitable jobs. A Google Ads campaign might generate 20 enquiries a month but only at a cost per booked job of £80, while a leaflet drop generates 5 enquiries at a cost per booked job of £25. Without tracking, you have no basis for deciding where to spend more.

Measure campaign ROI quarterly rather than monthly, because some channels (especially SEO and referrals) have longer lag times between spend and revenue. The goal is a blended cost per booked job below 15% of your average job value — so if your average job is £400, you want your marketing cost per booked job below £60.

7. First-time fix rate

First-time fix rate (FTFR) is the percentage of reactive and repair jobs that are resolved completely on the first visit. It is particularly important for trades doing breakdown and repair work — plumbers attending leaks, heating engineers fixing boilers, electricians diagnosing faults.

A low first-time fix rate (below 75%) is expensive in several ways: engineers spend time revisiting jobs that could have been completed, customers become frustrated and less likely to return or refer, and your diary capacity is consumed by return visits rather than new jobs. The main causes of low FTFR are insufficient parts stock on the van, engineers not diagnosing the root cause before replacing parts, and inadequate information taken when the job is booked.

Improving FTFR typically involves: better pre-visit questioning when booking (to identify the most likely parts needed), improving van stock for common repairs, and training engineers to carry out a full diagnostic before starting work. A 10-percentage-point improvement in FTFR is often worth more to a trade business than adding a new engineer.

8. Google review rating and volume

Your Google review rating is both a KPI and a marketing asset. It directly affects how many people click on your listing in local search results, and it correlates with your ranking in the local 3-pack. A trade business with a 4.8-star rating across 60 reviews will outperform one with 5.0 stars across 8 reviews in virtually every local market.

Track two numbers: your current star rating and your monthly review count. Your target should be at least two to four new reviews per month. If you are generating fewer than this, you are not asking consistently — which is almost always the issue. Automate the review request (via text message after job completion) so it happens without relying on engineers or office staff to remember.

When your rating drops below 4.6, investigate the underlying issues rather than just chasing more positive reviews. A pattern of complaints about punctuality, communication, or unresolved issues signals an operational problem that reviews alone will not fix. The data from your KPI dashboard — FTFR, job completion rate, response time — will usually point to the same root cause as the negative reviews.

How to start tracking these KPIs

You do not need to track all eight KPIs from day one. Start with the two or three that are most relevant to your current business challenge. If your diary is full but profits are thin, focus on revenue per engineer and average invoice value. If you are spending on marketing without confidence it is working, start with campaign ROI and quote-to-job conversion. If you are losing customers to competitors, look at retention and first-time fix rate.

Trade2Base tracks most of these metrics automatically — revenue per engineer, average invoice value, quote conversion, and campaign ROI are all visible on the dashboard without manual calculation. Review your KPI dashboard weekly for fast-moving metrics (job completion, daily revenue) and monthly for trend metrics (retention, campaign ROI). The point is not the number itself — it is the trend and what is driving it. A business that reviews its KPIs monthly and acts on what they reveal grows faster and more profitably than one that waits until the end of the year to look at the accounts.