FIELD GUIDE · 10-MINUTE READ
The handful of numbers a home service owner should know cold — and the back-of-napkin math to check your own shop this week.
Running a tight shop doesn't take a finance degree. It takes eight numbers you can say out loud on a bad day, and the discipline to look at them every week instead of once a quarter when the accountant calls.
This is the same framework we use in the Revenue Systems Audit, with real numbers attached instead of vague advice. Run your own shop against it and see what falls out.
Every home service business — HVAC, plumbing, electrical, pest, lawn, pool — runs on the same four-part equation:
Opportunities × Booking Rate × Close Rate × Average Ticket = Revenue
Miss on any one of the four and the whole number moves. Most owners chase the first variable: more leads, more ad spend, more opportunities. It's what marketing sells, and it feels like growth. It's also usually the most expensive lever and the last one you should pull. Fix the other three first. They're sitting in data you already have, at zero cost to find, and a dollar spent there beats a dollar spent buying more traffic through a system that's still leaking.
01
What it is: Of the calls that come in, what percentage turn into a booked appointment.
What good looks like: Top operators book 70%+ of inbound calls. Industry average sits closer to 42%, which means most shops lose more than half their paid-for calls before a truck ever rolls. Missed calls alone run an estimated $1,200 in lost revenue apiece, and for a shop running 5–14 techs, a five-point gain in booking rate is worth roughly $100,000 a year.
Back-of-napkin math: Pull last month's call count from your phone system or CRM. Divide booked appointments by total calls. If you don't know your call count, start there — you can't manage a number you don't track.
02
What it is: Of the estimates or quotes you've sent, how many are still open — unsold, past 7–14 days without a second call.
What good looks like: A tight follow-up cadence keeps open-estimate dollars turning over inside two weeks. Most shops we look at are sitting on stale quotes nobody called back on. Speed compounds the effect — a lead contacted within five minutes converts far better than one contacted even 30 minutes later, an edge repeatedly documented in lead-response research going back to an original MIT-based study. Shops running a real multi-touch sequence (call, text, email) instead of one follow-up call see response rates several times higher.
Back-of-napkin math: Add up the dollar value of every open estimate older than 14 days. That's not lost revenue, it's revenue you already paid to generate and haven't collected. A follow-up cadence costs less than replacing that money with new leads.
03
What it is: Of the estimates your techs actually present in the field, what share convert, and how many pricing options they show per call.
What good looks like: Top operators close 35–45% on replacement work, 60–70% on repair work. Mid-tier shops often sit in the low 20s on replacement. The biggest single lever here: techs who present one price close around 18–22% of the time. Techs who present three options (good/better/best) close 38–44% — roughly double, for the cost of a laminated sheet.
Back-of-napkin math: Ask your top tech and your newest tech for their individual close rates. The gap between them is your training cost, priced in dollars. Then check whether they're presenting one number or three.
04
What it is: Gross margin — price minus labor, materials, and subcontracted cost — broken out by job type, not blended into one number for the whole business.
What good looks like: Service and repair work typically runs 55–70% gross margin; plumbing service can run near 70%. Installs are thinner and more volume-dependent, commonly 35–45% for HVAC. A single blended margin number hides which job types carry the business and which are quietly subsidized by the others.
Back-of-napkin math: Pick your three most common job types. Price minus direct cost, divided by price. If you've never split margin by job type, you're pricing on gut feel, which works fine until a competitor undercuts the one job type you didn't know was thin.
05
What it is: What share of service calls turn into a membership or maintenance plan sale, and what share of existing members renew.
What good looks like: Average shops convert 15–25% of service calls into memberships at the point of sale; top performers convert 40–60%. Retention tells the same story — membership customers retain in the mid-90s to 97%, versus 65–70% for non-members. Members generate an estimated 2.5–3x the annual revenue of non-members and drive a disproportionate share of replacement volume down the road. This isn't just an HVAC lever — pest control runs on it even harder, with roughly 74% of industry revenue coming from recurring service plans, and pool service isn't far behind at 60–80% recurring.
Back-of-napkin math: Members ÷ total unique customers serviced in the trailing 12 months. Under 15–20% means you're leaving the most stable revenue line in the business unsold.
06
What it is: How often your team actually asks a satisfied customer for a referral or review, versus how often it happens on its own.
What good looks like: A consistent, scripted ask on every five-star job, not a QR code on a truck. Referred customers convert at higher rates than cold leads, tend to be more loyal, and cost $50–$100 to acquire with an incentive — versus $200–$800 for a paid lead through other channels. Referrals and repeat business typically make up 20–30% of total lead volume for shops that actually track source — usually the highest-converting, lowest-cost channel in the business, and the most neglected.
Back-of-napkin math: Count new customers last quarter tagged "referral" in your CRM, or your best manual estimate. If nobody's tagging source, fix that first. You can't tell your best marketing channel from your worst one if you can't see either.
07
What it is: How many qualified technician candidates you have in the pipeline at any time, how long a new hire takes to reach full productivity, and how much revenue each tech actually generates.
What good looks like: A live pipeline, not a scramble that starts the week someone quits. As a capacity check: fully-loaded techs in HVAC, plumbing, and electrical commonly generate $150K–$250K annually, with real spread between your best and worst performer. Lawn care runs lower per person — commonly $120K–$160K per employee — and pool service routes commonly report $180K–$260K per truck. The number differs by trade; the discipline of knowing yours doesn't. If you don't know that number per tech, you don't know whether your next hire pays for themselves or dilutes the average.
Back-of-napkin math: If your honest answer to "who's next" is nobody, recruiting is your real capacity constraint. It sits behind all seven of the other numbers, because none of them improve without the labor to execute on them.
08
What it is: Whether the seven numbers above get reviewed on a fixed weekly cadence, by name, with someone accountable for each one, or whether they get discovered at tax time.
What good looks like: A one-page weekly scorecard, fifteen minutes, same day every week, same numbers every time. No new software, no consultant required to start.
Back-of-napkin math: There isn't one. Either the meeting happens or it doesn't. It's the cheapest fix on this list and the one most owners skip.
Run the seven measurable numbers above against your own shop this week. You'll likely find one or two clearly off and a few you're not sure about. Most owners we talk to have never seen all eight side by side, let alone benchmarked against what good looks like in this industry.
The math on why it's worth an hour: if your booking rate is 15 points under top-operator benchmark, or your membership attach rate is half of best-in-class, that's not a rounding error. On a $2M shop, gaps like that commonly run into the hundreds of thousands of dollars a year, recurring. Finding it costs nothing. Not finding it costs the same number, silently, every year you don't look.
If you want a second set of eyes on the actual math, real numbers pulled from your own systems, not back-of-napkin, that's what the Revenue Systems Audit is for. If you're not ready for that yet, start with the Revenue Leak Snapshot — four numbers, two minutes, and you'll see roughly where the leak is sitting before you talk to anyone.
Benchmark ranges above are drawn from ServiceTitan's call booking rate data (3,000+ trade businesses), Clint's Home Service KPI Benchmarks report, Pipeline On's home service membership and marketing research, the NPMA/PCO Bookkeepers 2025 Pest Control Industry Cost Study, the National Association of Landscape Professionals' 2025 Financial Benchmark Report, and Threshold's own audit work. Ranges vary by trade, market, and shop size — treat them as a gut-check, not a verdict. The only numbers that matter are yours.