Your engineers are booked out but the margin tells a different story. Engineer utilisation gaps, van stock tied up in slow-moving parts, quotes that go unanswered, and certification admin eating into chargeable time — these are the drains most electrical contractors never measure.
Based on an electrical contractor with 3–10 engineers. These are the areas that consistently drain margin — and that almost never appear as a visible line in the accounts.
In electrical contracting, a productive engineer should be on chargeable work for 75–80% of paid hours. The reality in most small contractors is closer to 60–68% — the rest is travel between jobs, waiting for access, going back to the van for parts, administrative tasks and gaps between bookings. On a 4-engineer team billing at £55/hr, the gap between 65% and 80% utilisation is over £27,000 in annual unbilled hours. The engineers are there. The time just isn't captured against revenue-producing work.
£15,000–£35,000/year in unbilled engineer timeEvery electrical engineer carries a van stocked with parts. In businesses without a formal van stock management system, van inventory tends to grow over time — engineers buy extra "just in case", obsolete parts accumulate, and the same parts are held across multiple vans without coordination. A typical 5-van electrical operation has £8,000–£18,000 in van stock value, with an estimated 20–35% of that in slow-moving or obsolete items. That's capital tied up in parts that earn nothing, while frequently-used items run out and cause delays.
£4,000–£12,000 in tied-up capital; £3,000–£8,000/year in avoidable emergency procurementIn electrical contracting, most domestic and commercial customers get 2–3 quotes. The contractor who follows up within 24 hours converts at a dramatically higher rate than the one who sends the quote and hopes. Industry research consistently shows that 35–40% of lost electrical quotes are lost to follow-up failure rather than price. At an average job value of £600–£900 and a business sending 80 quotes per month, improving follow-up from 0% to systematic converts 5–8 additional jobs per month — worth £36,000–£86,000 in annual revenue.
£20,000–£50,000/year in recoverable revenuePoor job scheduling in electrical contracting creates two costs simultaneously: excessive travel time between jobs, and gaps in the diary where engineers are available but nothing is booked. A scheduling system that sequences jobs geographically and fills cancellation slots systematically can recover 30–45 minutes of chargeable time per engineer per day. Across a 4-engineer team over 220 working days, that's 440–660 additional chargeable hours per year. At a billable rate of £55/hr, that's £24,000–£36,000 in additional recoverable revenue from the same team.
£15,000–£30,000/year in recoverable engineer timeEICRs, installation certificates, minor works certificates, Part P notifications — the paperwork load on a small electrical contractor is significant. When engineers complete certification admin on-site or in the van at the end of the day, they're using chargeable time for administrative work. A business without a streamlined certification workflow — templates, mobile completion, same-day upload — loses an estimated 1–2 hours of chargeable engineer time per job on larger installations. That's a material cost at scale.
£6,000–£14,000/year in chargeable time lost to certification adminDomestic electrical work is typically paid promptly. Commercial and property management work is not. An electrical contractor doing 40% commercial work on standard 30-day terms, where the actual payment average is 52 days, is carrying a significant cash flow gap at all times. On an annual revenue of £700,000 with a 40% commercial split and 22-day average delay, that's approximately £17,000 in cash permanently outstanding beyond terms — either financing an overdraft or constraining the business's ability to invest in equipment and engineers.
£4,000–£10,000/year in financing cost on extended commercial debtor daysApproved contractor scheme membership (NICEIC, NAPIT, ELECSA) is not just a marketing asset — it is a legal requirement for self-certifying notifiable electrical work under Part P of the Building Regulations. A scheme suspension triggered by a failed assessment visit, inadequate documentation, or an upheld complaint removes your ability to self-certify, forcing every notifiable job through Local Authority Building Control — adding cost, delay, and customer friction to every installation. Keeping certification records current, maintaining calibrated test equipment, and ensuring all engineers hold valid qualifications is a live compliance obligation.
Risk: Scheme suspension — loss of self-certification ability; LABC fees of £200–£500 per notifiable jobA call-back in electrical contracting means an engineer returns to a job to remedy a fault, complete work left unfinished, or respond to a customer complaint. Each call-back typically costs 1.5–3 hours of engineer time plus travel — entirely unrecoverable for the business. A 4-engineer contractor with a call-back rate of 4% across 800 jobs per year has 32 call-backs. At an average cost of 2 hours at £55/hr plus travel, that's £3,520 in direct cost. The bigger cost is the Google review the customer leaves, and the referral they don't make.
£3,000–£8,000/year in direct call-back cost (excluding reputational impact)The Diagnostic Assessment examines your electrical business across all 10 pillars. For electrical contractors, the three areas that consistently surface the most recoverable value are Operations and Scheduling (Pillar 4) — where engineer utilisation is benchmarked against ECA sector data and the annual cost of the gap is calculated in £ for your team size and billing rate; Sales and Conversion (Pillar 3) — where quote-to-job conversion rate is assessed against the sector benchmark and the revenue value of improving follow-up is quantified; and Risk and Compliance (Pillar 10) — where approved scheme documentation, engineer qualification status, and Part P compliance are reviewed and any exposure is flagged clearly.
We also mystery-shop your enquiry response, review your Google Business Profile and online reputation, analyse your Companies House filings, and compare your financial margins to electrical contracting sector benchmarks. The result is a 20–30 page written report — every finding specific to your business.
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Every month you don't know where your operation is leaking, it keeps leaking. At the average SME rate, that's around £3,000 a month. The assessment costs £599.
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