How do you calculate the ROI of answering every call?

You can probably say, almost to the dollar, what a lead from Google costs you this month. Ask most owners what a missed call costs and you get a shrug. That gap is the most expensive blind spot in a service business. The calls you never answered do not show up on any report, so they feel free. They are not free. Every one of them was a job, and it went to whoever picked up. A missed call is not a missed message. It is revenue you already paid to generate, walking out the door unrecorded.

The good news is that you can put a real number on it. Answering every call has a return you can size up the same way you would weigh any other investment in the business, and once you see it written down it changes how you think about staffing the phone. Here is how to run the math, step by step, with a worked example you can copy.

How do you calculate the ROI of answering every call?

You need four numbers: how many calls you miss in a month, what share of them were real prospects, your average job size, and your close rate on the calls you do answer. Multiply the missed prospects by your close rate and your average ticket, and you have the revenue leaking out of your phone every month. Set that number next to what it costs to cover the phone, and the ratio between them is your return. For most trades and restoration businesses the recovered revenue is the larger number by a wide margin, because the tickets are high and a missed call is money that simply leaves.

None of those four numbers are exotic. You either have them in your call log and your books, or you can estimate them closely enough to make the point. Take them one at a time, then run the full example.

How many calls are you actually missing?

Start with the count, because it is almost always higher than owners think. Across home services, Invoca's 2025 benchmarks, drawn from more than 60 million calls, found that only 55% of callers reach a live person (Invoca, 2025). Nearly half do not get through to a human on the first try. Not every one of those is a lost job, some reach a useful automated system, but in a trade where the phone is how work gets booked, a large share of them are.

Pull the number for your own shop. Most call-tracking and VoIP systems show answered versus missed or abandoned calls, and that report is where this calculation should start. If you do not track calls yet, that is the first fix, because you cannot manage what you cannot see. Absent any data, the Invoca figure is a fair starting estimate: assume a meaningful slice of your inbound is going unanswered, especially after hours, during two-calls-at-once collisions, and when you are on a roof or under a sink and cannot get to the phone.

What is a single answered call worth to you?

This is the number that turns a missed call into a dollar figure. Take your average job size and multiply it by the rate at which you close the calls you actually answer. If your average ticket is $600 and you book half the qualified calls you pick up, then a qualified call is worth about $300 to you before it even rings.

Two things push that number up. First, speed. In Dr. James Oldroyd's "The Short Life of Online Sales Leads" study (Harvard Business Review), an audit of 2,241 U.S. companies, firms that responded to a new lead within an hour were nearly 7 times more likely to qualify it than those who waited even an hour longer. Answering the call live is the fastest response there is, so the calls you catch in the moment tend to convert better than the ones you chase later. Second, almost nobody you miss will circle back. Per Invoca's platform data, fewer than 3% of callers sent to voicemail leave a message (Invoca). The other 97% dial the next name on the list. So when you count a missed prospect as lost, you are being realistic, not pessimistic. We break the single-call math down further in what a single captured call is actually worth.

How do you turn that into a monthly and yearly number?

Now put the pieces together. Plug in your own figures; the ones below are round numbers chosen to show the shape of it, not a claim about your shop.

Change the inputs to match your business and watch how fast it moves. Raise the average ticket to $2,000, the kind of number a system replacement or a restoration job carries, and the same call volume is worth several times as much. Drop your miss count and the number shrinks, which is exactly the point of fixing it. The figure itself is not the takeaway. The takeaway is that it is large, specific, and completely invisible until you write it down.

What does the coverage side of the equation cost?

A return needs both halves, so put a cost next to that recovered revenue. You have a few ways to cover the phone, and each carries a price you can look up:

• An in-house receptionist or dispatcher. The median receptionist wage is $17.90 an hour (BLS, May 2024), which is about $37,200 a year for one full-time seat before payroll taxes and benefits. One seat covers roughly 40 of the 168 hours in a week, so true around-the-clock coverage is a multiple of that.
• A 24/7 human answering service. These run from a few hundred to over a thousand dollars a month depending on call volume and how much they do on each call, and most take a message rather than book the job.
• An AI receptionist. A flat monthly cost to answer every call at once, around the clock, and book the job to the calendar instead of taking a message.

Divide your recovered revenue by whichever coverage cost you are weighing, and you have your return. Run it honestly with your own numbers. For most high-ticket trades and restoration shops, the revenue on the table is far larger than the cost of answering the phone, which is exactly why the missed-call problem is worth solving rather than tolerating. If you want to see where that leaked revenue tends to hide first, we mapped it in where home service marketing spend leaks the most.

Does the math change for restoration?

The framework is identical, but two inputs change and both push the value up. The tickets are bigger: Angi's member-reported data puts the average water-damage job at nearly $3,900 (Angi), with severe losses running well into five figures. And the calls come at the worst hours, nights, weekends, and in the middle of a storm, exactly when a single dispatcher is off the clock. A restoration caller standing in an inch of water is the highest-intent call in home services and the least likely to wait for a callback. Miss it and you did not miss a message. You handed a several-thousand-dollar job to whoever answered.

What do owners get wrong when they run this?

The math is simple, but a few honest mistakes make it wrong. Watch for these:

• Assuming missed callers leave a voicemail. Fewer than 3% do. If your plan for the calls you miss is that they will leave a message, the data says they will not.
• Counting every missed call as a job. They are not, which is why the "share that were real prospects" factor matters. Take out the spam, the wrong numbers, and the existing-customer questions. Being honest here keeps the whole number credible.
• Stopping at the first job. A captured customer can turn into repeat work, referrals, and a review. You do not need to invent a multiplier to know the first job understates the real value, so treat your figure as a floor, not a ceiling.
• Treating it as a soft marketing number. It is not. It is average ticket times close rate times missed volume, the same arithmetic you would run on any other line in the business. Give it the same weight.

Speed belongs in the honest column too. The faster the answer, the better the number, which is why how fast you call a new lead back feeds directly into this calculation.

Where Willison fits, honestly

Once you have run the numbers, the question stops being whether missed calls cost you and becomes what to do about it. Willison answers every inbound call 24/7, in seconds, qualifies the job, books it straight to your calendar, and can text you the details so you know a live one just came in. It picks up the calls that land at the same moment and the ones that come in at 2am, the exact calls that show up as zeros in the math above.

It also closes the loop on the measurement. Willison reads every call and, at month's end, can produce a single report on what the phone was worth, so the recovered-revenue number you estimated stops being a guess. Beyond answering, it follows up the lead who hesitated and checks back on a quote that has gone quiet, all as one managed system that the founder reviews before it takes a real call, and one you never have to babysit. The honest way to size it up is to hear it. Talk to the live Willison demo right in your browser on willisonhq.com, run a call at it, and see whether it handles your phone the way the math says it should.

Frequently asked questions

Use four numbers: how many calls you miss in a month, what share were real prospects, your average job size, and your close rate on answered calls. Multiply the missed prospects by your close rate and your average ticket to get the revenue you are losing each month, then weigh that against what it costs to cover the phone. For most trades and restoration businesses the recovered revenue is much larger than the cost, because the tickets are high and missed callers rarely call back.

It depends on your ticket size and volume, but the number is usually bigger than owners expect. As an illustration, a shop missing 20 calls a month where half are real prospects, with a $600 average ticket and a 50% close rate, is losing roughly $3,000 a month, about $36,000 a year. Raise the ticket to a system replacement or a restoration job and the figure climbs fast. Run it on your own average ticket and close rate.

Multiply your average job size by your close rate on answered calls. If your average ticket is $600 and you book half the qualified calls you pick up, a qualified call is worth about $300 before it rings. Speed raises that: firms that answer within an hour are nearly seven times more likely to qualify a lead than those who wait, per Harvard Business Review, and answering live is the fastest response there is.

Almost never. Fewer than 3% of callers sent to voicemail leave a message, per Invoca's platform data, and the rest simply call the next business on the list. Planning around the idea that missed callers will circle back is the single most common mistake in this calculation. Treat a missed prospect as a lost job, because that is what it usually is.

Track two things: how many calls now get answered that used to be missed, and how many of those turn into booked jobs. Multiply the new booked jobs by your average ticket to get the recovered revenue, then compare it to what the coverage costs. Call-tracking data or a monthly call report makes this straightforward, so the return stops being a guess and becomes a line you can actually see.