How Much Do Missed Calls Cost an HVAC or Plumbing Shop?

A missed call costs an HVAC or plumbing shop the job it would have booked, times the odds of booking it. Using published averages (a 38% HVAC booking rate and a $1,205 average repair job), each missed call is worth about $458 in first-job revenue, so five missed calls a week is roughly $9,900 a month, or about $119,000 a year.

That is before counting replacement jobs, maintenance plans, and repeat business from the customers who went to someone else. Below is what the research actually says, a formula to work out your own number, and the fixes ranked from free to paid.

How many calls home-service shops miss

The best recent data comes from Invoca, which analyzes calls for home-service businesses. Its 2026 benchmark report, published in July 2026 and covering HVAC, plumbing, and seven other home-service categories, found:

• 52% of inbound calls to home-service businesses are answered by a person.
• 65% of calls longer than 15 seconds are answered, and 73% of calls longer than 30 seconds.
• Answer rates across the sub-industries range from 32% to 74%.
• 55% of home-service businesses don't ask leads to book the job.

The filtered numbers matter. Some calls are misdials, robocalls, or people who hang up after one ring. Even after removing calls under 30 seconds, more than a quarter of callers never reach a person.

Booking rate tells a similar story. ServiceTitan looked at more than 3,000 trade businesses in the US and Canada in June 2022 and reported the share of calls that got booked:

The gap between big and small shops is mostly a staffing gap. A shop with a dispatch team answers the phone. A shop where the owner is also a tech lets it ring while their hands are inside a furnace. The evening drop is the same problem at a different hour; our after-hours playbook covers that side in detail.

Where the recycled numbers come from

You will see “62% of calls to small businesses go unanswered” on a lot of vendor sites. It traces back to a 2016 411 Locals post that monitored 85 businesses in 58 industries for 30 days. It is a real study, but it is small, old, and not specific to the trades. “85% of callers who reach voicemail never call back” is worse: we could not find any study behind it. We don't use either.

What callers do when nobody answers

CallRail surveyed 1,000 US consumers and published the results in September 2025:

• 42% leave a voicemail. The rest don't.
• 21% immediately call another business.
• 82% say they will call a competitor if you don't answer.
• 78% have abandoned a business after an unanswered call.
• 24% turn to online chat instead.

Two caveats. These are stated answers, not tracked behavior, and CallRail sells call tracking. The 21% and 82% figures also measure different things: 21% describes what people do right away, while 82% describes what they say they would eventually do. For a homeowner with water on the floor or no heat in January, the immediate number is the one that bites, because the next shop on the search results page is one tap away.

Speed shapes who gets hired. In Housecall Pro's October 2025 survey of 1,040 US homeowners, 97% said fast response and pricing influence who they hire, and 53% said they are comfortable with AI handling the initial inquiry.

What one call is worth

Ticket size depends on who is measuring. Contractor platforms report revenue per job, which bundles diagnostics, parts, and add-ons. Homeowner cost guides report what people say a typical repair costs. Both are useful as long as you know which one you are looking at.

The Housecall Pro figure is the better one for a contractor, because it is what shops actually invoiced. The homeowner numbers are a useful floor if your work is mostly small service calls. The replacement figure is the reason a missed call in July or January hurts more than the averages suggest: a no-cool call on a 20-year-old system is often a replacement lead.

Maintenance agreements and lifetime value

There is no trustworthy public benchmark for customer lifetime value in HVAC or plumbing. The multipliers you see online (“members are worth 3x”) come from vendor blogs, not studies. Work it out from your own books instead:

• Annual plan fee × average years a member stays
• + average repair revenue per member per year × years
• + chance a member replaces equipment with you × your average replacement ticket
• + referrals, if you track where new customers come from

Every first call you miss is also every one of those future tickets you never get a shot at.

Calculate your own lost revenue

The basic formula has four inputs:

Lost revenue per month = missed calls per week × 52 ÷ 12 × your booking rate × your average ticket

Worked example with the published averages

1. Missed calls: 5 a week. 5 × 52 ÷ 12 = 21.67 missed calls a month.
2. Booking rate: 38% (ServiceTitan HVAC, June 2022). 21.67 × 0.38 = 8.23 jobs a month.
3. Average ticket: $1,205 (Housecall Pro, 2025). 8.23 × $1,205 = about $9,920 a month.
4. Per year: $9,920 × 12 = about $119,000.

Those are the defaults in the missed-call calculator on our home page, so you can move the sliders to your own numbers and get the same math instantly.

Refining it for your shop

The simple version can overstate or understate your loss. Adjust it like this:

1. Remove noise. Drop calls under 15 seconds, known spam, and repeat dials from the same number within an hour. Invoca's data shows how much this changes the picture: the answer rate rises from 52% to 65% once short calls are removed.
2. Subtract what you recovered. If you called back 20 missed numbers and booked 4, those jobs are not lost.
3. Use your own booking rate from answered calls, not the industry figure.
4. Blend your ticket. If 1 in 10 booked jobs becomes a replacement, use a weighted average: (0.9 × $1,205) + (0.1 × $7,500) = $1,084.50 + $750 = $1,834.50.

Here is how the same shop looks under three sets of assumptions:

Even the conservative row is real money for a small shop, and it ignores lifetime value entirely.

How to measure your missed calls

Most owners guess low. Pull one month of real data before deciding anything.

1. Your phone carrier or VoIP portal

Almost every business phone system logs inbound calls with a status: answered, missed, voicemail, or abandoned. Export a month to a spreadsheet and count unanswered calls by hour of day and day of week. Cell phones are harder; check the carrier's call detail records or the recent-calls list daily for a week.

2. Call tracking

If you run ads or a website, call tracking numbers show which calls came from marketing and whether they were answered. This is the cleanest way to see how many paid leads you are dropping.

3. Your field service software

If your CSRs log calls in your field service management tool, compare booked jobs against inbound calls for the same period. That gives you your own booking rate, the most important input in the formula.

4. A test call

Have a friend call your main line at 7:30 AM, at noon on a busy day, at 6:30 PM, and on a Saturday. Note how many rings, whether a person answers, and how long the callback takes.

Fixes, ranked by cost

Start at the top. Each step is worth doing before you pay for the next one.

1. Callback discipline (free)

Assign one person to call back every missed number within five minutes during business hours, and log the outcome. If 21% of callers immediately try someone else, a callback an hour later often reaches someone who already booked. Also make sure whoever answers actually asks for the booking; Invoca found 55% of home-service businesses don't.

2. Call routing and ring groups (low cost)

Most business phone systems can ring several phones at once or in sequence: the office, then the owner, then the on-call tech. Shorten the ring time before voicemail and record a voicemail greeting that says when you will call back.

3. Overflow and after-hours answering (monthly fee)

A live answering service picks up when your team can't. Quality varies a lot: some only take messages, others can book. Compare per-minute pricing against your call volume, and test them with a call of your own.

4. AI receptionist (flat monthly fee)

An AI receptionist answers every overflow and after-hours call, books the job, and texts you the details. Ringstead, for example, picks up when you don't, when the line is busy, or after hours, on the number you already have. It tells callers it is an AI, books onto your calendar in English or Spanish, and sends emergencies to 911 first before ringing you. Our guide on what an AI receptionist is explains how they work, and this comparison lays out the costs against answering services and hiring.

What to do this week

1. Export last month's call log and count missed calls by hour.
2. Pull your booking rate and average ticket from your invoices.
3. Plug them into the calculator and write the monthly number down.
4. Set a five-minute callback rule and track recovery for two weeks.
5. If the leftover gap is mostly evenings, weekends, or busy afternoons, price out overflow answering. Our FAQ covers the common questions, and you can book a demo to hear Ringstead answer a call for your shop.