The Math Behind Your Missed Revenue

Ask a service business owner what missed calls cost them and you will usually get a shrug and a rough guess. The guess is almost always too low, because the calculation feels complicated and nobody sits down to do it properly.

The calculation is not actually complicated. It needs four numbers you already have, and the result is usually uncomfortable enough to act on.

**One: your average job value.** Not revenue, and not your biggest job, the mean. If you do a mix of small service calls and large installations, weight it. A roofing company averaging $14,000 and an HVAC company averaging $900 are in completely different businesses when it comes to missed-call exposure.

**Two: how many calls you miss.** This is the number most businesses underestimate, because the calls you miss are by definition the ones you never saw. Pull the actual data from your phone system over a normal month, not a slow one. Include after-hours. Include the ones that rang out while the front desk was on another line.

**Three: your realistic conversion rate.** The share of answered, qualified calls that become booked jobs, not your best month, your normal one. If you close 30% of the calls you handle well, use 30%.

**Four: the recovery rate.** Not every missed call was a lost job. Some called back. Some went elsewhere. A reasonable assumption is that you recover somewhere between a fifth and a third of them through luck and persistence.

Multiply the missed calls by your conversion rate, subtract the ones you would have recovered anyway, and multiply by average job value. That is your annual leak, and for most service businesses it lands somewhere between surprising and alarming.

**The second leak is quieter.** Missed calls are visible, or at least countable. The revenue sitting in your existing database is not. Every past customer who has not booked in a year, every estimate that never got a third follow-up, every lead that filled out a form and heard nothing. Those are leads you already paid to acquire.

The reason this matters is that the two leaks have different fixes. Missed calls are a coverage problem, solved by answering everything. Dormant lists are a follow-up problem, solved by consistent outreach at scale. Most businesses have both, and most tools only address one.

You can run the first half of that math on a specific zip code and industry in about a minute using the calculator on our homepage. The number is an estimate, but it is an estimate built from your inputs rather than a vendor's average, and that is the difference between a figure you dismiss and one you act on.