Marketing Economics
Cost per booked estimate is calculated by dividing total marketing or lead-generation spend for a given period by the number of confirmed, booked appointments that spend produced: Cost per Booked Estimate = Total Spend ÷ Number of Booked Appointments. It's a more useful metric than cost per lead alone because it accounts for how well a lead source (or your own follow-up process) actually converts inquiries into appointments on the calendar. Tracking this number consistently, across sources and over time, lets a contractor compare marketing channels on equal footing and see whether a cheaper lead source is actually cheaper once appointment conversion is factored in.
Published · Updated · 7 min read
Cost per booked estimate = Total spend for the period ÷ Number of booked appointments generated in that period. Spend should include everything that went into producing those appointments: ad spend, lead provider fees, and, if you want a fully loaded number, a reasonable share of staff time spent on follow-up calls.
Most contractors start with a simpler version — just the direct cost of leads or ads — and add staff time later once the basic tracking habit is established.
The figures below are illustrative math used to demonstrate the calculation. They are not a projection, average, or guarantee for any contractor's actual results.
Cost per lead only tells you how much you paid to generate interest — it says nothing about whether that interest turned into anything on your calendar. Two lead sources can have identical cost per lead and wildly different cost per booked estimate if one converts to appointments at twice the rate of the other.
Because appointment conversion depends heavily on your own speed to respond and follow-up quality, cost per booked estimate also captures some of your internal process performance, not just the lead source's quality. That's useful, but it also means comparing this number across sources is only fair if your follow-up process was applied consistently to both.
The natural next step is calculating cost per completed job — total spend divided by the number of jobs actually closed and completed. This is the number that ultimately determines whether a marketing channel is profitable, since a cheap booked appointment that never closes isn't actually a bargain.
Building out all three numbers (cost per lead, cost per booked estimate, cost per completed job) side by side, for each marketing channel, gives a much fuller picture than any single metric on its own.
The most common mistake is inconsistent time windows — comparing spend from one month against appointments booked in a different month because of lag between lead generation and booking. Try to match spend and appointments to the same cohort of leads where possible, even if that means a short delay before the number is final.
Another common mistake is excluding no-show appointments from the denominator. A 'booked' appointment should count when it was booked, whether or not the homeowner ultimately showed up — show rate is a separate, equally important metric to track alongside this one.