Missed Call Revenue Calculator

This calculator turns a vague worry — “we’re probably losing some money on missed calls” — into a number a window replacement company can actually act on.

Start with last month’s missed calls. Say the front desk logs 74 missed calls in a month.

Filter for legitimacy. Not every missed call is a live sales opportunity — some are vendors, wrong numbers, or existing customers. If 52 percent are genuine new inquiries, that’s 38 real opportunities sitting in the missed pile.

Apply the normal booking rate. If 58 percent of qualified callers who do get reached go on to book an appointment, 38 opportunities would normally produce about 22 bookings.

Apply the show rate. At a 91 percent show rate, that’s roughly 20 completed appointments.

Apply the close rate. At 27 percent, those 20 appointments would typically produce about 5.4 sales.

Apply the average sale. At $9,400 per window job, that pool of missed calls represents roughly $50,760 in expected revenue that never had a chance to become anything.

The honest caveat: not every missed opportunity is recoverable. If you assume only 60 percent could realistically have been saved with faster response, the working number drops to about $30,456 — still real money, and still worth fixing.