Keep clients coming back · Every business
The Numbers Home Service Owners Should Track Each Month
An HVAC, plumbing or electrical company can run on seven monthly numbers that follow the customer from the first estimate to the next season's tune-up, and most of them are already sitting in the dispatch and invoicing software.
At a glance
- Monthly KPIs for a home service business are a short, fixed set of numbers that show whether customers are booking, buying, staying on a plan and paying on time.
- Eighty-eight percent of U.S. households use air conditioning, and two-thirds use central AC or a central heat pump as their main equipment, according to the Energy Information Administration, which makes the maintenance agreement the backbone of most HVAC customer relationships.
- In an illustrative company with 600 maintenance members, raising the renewal rate from 70% to 80% keeps 60 more members a year, worth about $22,500 in plan fees and follow-on repairs.
- Track seven numbers on one page, read them on the same day each month and act on the one that moved the wrong way.
Part 1 | The season decides what the numbers mean
A home service company's month looks nothing like a salon's. The phones and the trucks follow the weather, so a slow April and a frantic July can both be normal, and a monthly number only means something when it is compared with the same month last year or read as a share rather than a total. The ENERGY STAR maintenance checklist advises homeowners to have a contractor do annual pre-season check-ups, with the cooling system checked in spring and the heating system in fall, which gives the business two natural moments each year to see every member customer.
The temptation is to watch revenue and the board. We had a record July, so we're fine. A record July can hide a maintenance base that shrank by a tenth, a backlog of unsent estimates and invoices sitting at 45 days, and none of that shows up until the shoulder season, when the work that was supposed to carry the company through is missing. The Federal Reserve's 2024 small business survey found that 51% of employer firms named uneven cash flows as an operational challenge, and in the trades much of that unevenness comes from not watching the slow-season numbers in the busy months.
Part 2 | Seven numbers that follow the customer
| Number | How to calculate it | What it tells you |
|---|---|---|
| Booked jobs per inquiry | Jobs booked ÷ new inquiries | Whether the front door is working |
| Estimate close rate | Estimates accepted ÷ estimates given | Whether options and follow-up are working |
| Average ticket | Service revenue ÷ completed jobs | Whether techs are presenting full options |
| Callback rate | Return visits to fix the same job ÷ completed jobs | Whether the work held up |
| Maintenance members | Active agreements at month end | The size of your recurring base |
| Renewal rate | Agreements renewed ÷ agreements due to renew | Whether members feel the plan is worth it |
| Days to payment | Average days from invoice to payment | Whether cash arrives when work is done |
Three of these numbers do most of the work in the trades. The renewal rate shows whether a member who paid last year saw enough value to pay again, the callback rate shows whether the first visit fixed the problem, and the estimate close rate shows whether customers understood their options; when any one of them drops for two months running, it usually points to one moment in the visit, such as a tune-up that ended without a written report or an estimate emailed without a call.
Part 3 | What a renewal point is worth
| Agreements due to renew this year (Assumption) | 600 |
|---|---|
| Renewals at 70% (Calculated (600 × 70%)) | 420 |
| Renewals at 80% (Calculated (600 × 80%)) | 480 |
| Extra members kept (Calculated (480 − 420)) | 60 |
| Annual plan fee (Assumption) | $200 |
| Plan fees kept (Calculated (60 × $200)) | $12,000 |
| Share of members who also buy a repair in the year (Assumption) | 50% |
| Average repair ticket (Assumption) | $350 |
| Repair revenue kept (Calculated (60 × 50% × $350)) | $10,500 |
| Total kept per year (Calculated ($12,000 + $10,500)) | $22,500 |
Illustrative example; replace every assumption with your own numbers.
The renewal is won or lost at the tune-up, months before the renewal notice goes out. A member who receives a short written report after each visit, listing what was checked, what was cleaned, the filter condition and anything to watch, has evidence of what the plan bought; a member who sees a truck come and go has only the invoice.
The renewal script for the tune-up visit
Before leaving, the technician walks through the report in under two minutes:
"Here's what we did today. Your system's running clean, I changed the filter, which was pretty loaded, and the coil's clear. Your plan covers the fall heating check too, so the office will reach out in September to set that up. Anything you've noticed with the system I should look at while I'm here?"
The office then logs the visit, schedules the next seasonal check before the month ends and flags any member whose tune-up was missed, since a member with no visit in a season is the likeliest not to renew.
How you compare
- Against last year's same month: in a seasonal trade, month-over-month comparisons mislead; compare July with last July.
- Against your labor market: the Bureau of Labor Statistics projects 11% growth in HVAC mechanic and installer jobs from 2025 to 2035, much faster than average, so a falling close rate in a busy month can reflect thin crews rather than weak sales.
- Against your own techs: compare average ticket, callback rate and close rate by technician; the spread shows who to pair with whom on ride-alongs.
Questions to ask this month
How many maintenance members do we have today, and how many renew in the next 90 days? Pull the list now, before the season changes.
Which tune-ups went out without a written report? Those members are the least likely to renew.
What is our callback rate by technician? One tech with twice the average more often points to a training gap than to a bad week.
How many days does it take us to get paid? If it is creeping up, look at when invoices go out, not just when they are paid.
Pick a fixed day each month, pull these seven numbers into one sheet and compare each with the same month last year before deciding what to change.
About this research: This article draws on the Energy Information Administration's 2020 Residential Energy Consumption Survey, ENERGY STAR and Department of Energy maintenance guidance, the Bureau of Labor Statistics Occupational Outlook Handbook and the Federal Reserve Banks' Small Business Credit Survey. The scorecard is an osNOVA framework; the renewal example is illustrative.
Sources
- U.S. Energy Information Administration. Nearly 90% of U.S. households used air conditioning in 2020. Today in Energy, May 2022. 2020 Residential Energy Consumption Survey.
- ENERGY STAR. Maintenance Checklist. U.S. Environmental Protection Agency.
- U.S. Department of Energy. Maintaining Your Air Conditioner. Energy Saver.
- U.S. Bureau of Labor Statistics. Heating, Air Conditioning, and Refrigeration Mechanics and Installers. Occupational Outlook Handbook, 2025 data.
- Federal Reserve Banks. 2025 Report on Employer Firms: Findings from the 2024 Small Business Credit Survey. 2025. 7,653 employer firms.
Related reading: Maintenance Plans: How to Set One Up for a Service Business · Seasonal Reminder Calendars for HVAC, Landscaping and Pest Control · Handling a Callback or Redo on a Home Service Job · Why Following Up on Estimates Wins Jobs, Shown in Numbers · Customer Retention Rate: How to Calculate It and What Good Looks Like
Work with osNOVA on the numbers that run your home service business
We help HVAC, plumbing and electrical companies set up a one-page monthly scorecard, a tune-up report that sells the renewal and the follow-up habits behind each number, starting from what you want more of, whether that is a bigger maintenance base, fuller shoulder seasons or steadier cash.
Email hello@osnovaops.com about your business
Or leave your email and we will reach out
Tell us what kind of business you run and what you want more of.
Not ready to talk? osNOVA runs free live events for owners.