Appointment no-shows are one of the largest hidden costs in a small service business. This free calculator shows how much revenue your business loses to no-shows each year and how much of that revenue automated appointment reminders can recover. It runs entirely in your browser, requires no email, and uses your own numbers.
Monthly lost revenue equals appointments per day multiplied by working days per month, multiplied by the no-show rate as a decimal, multiplied by the average revenue per appointment. Annual lost revenue is the monthly figure multiplied by 12. For example, a business seeing 20 appointments a day, 22 working days a month, with a 15% no-show rate and $120 average revenue per appointment loses about $6,344 per month, or roughly $76,000 per year.
Automated appointment reminders typically reduce no-shows by 30 to 50 percent. This calculator uses a conservative 35% reduction. Sending reminders and confirmation requests over WhatsApp, which has higher open rates than email or SMS, tends to land at the higher end of that range. The recoverable revenue figure shows the annual amount you could keep by adding automated reminders.
A business seeing 20 appointments a day with a 15% no-show rate and $120 average revenue per appointment loses about $76,000 per year. The exact figure depends on your appointment volume, no-show rate, and average revenue per visit.
Automated appointment reminders typically reduce no-shows by 30 to 50 percent. A conservative 35% reduction is used in this calculator. WhatsApp reminders tend to perform at the higher end.
Yes. The calculator is free and requires no email or sign-up. If you want to act on the results, Conversify automates appointment reminders and confirmation requests over WhatsApp, Instagram, and email from $29 per month.
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Last updated: 2026-08-31
Move the sliders to match your business. See your annual lost revenue and how much automated appointment reminders can recover.
Adjust to match a typical month. Results update instantly.
The average across service businesses is around 15%.
Lost to no-shows each year
That's $7,920 every month walking out the door.
Recoverable with automated reminders
Reminders cut no-shows by 30 to 50%. Your range: $28,512 to $47,520 per year.
ROI vs Conversify Starter
96× return
Recovering $2,772/mo vs $29/mo for Conversify.
Conversify sends automated appointment reminders and confirmation requests over WhatsApp, Instagram, and email, and rebooks cancellations automatically. From $29/month.
Monthly lost revenue = appointments per day × working days per month × no-show rate × average revenue per appointment.
Annual lost revenue = monthly lost revenue × 12.
Recoverable revenue = annual lost revenue × the no-show reduction from reminders. Automated appointment reminders reduce no-shows by roughly 30 to 50 percent across published studies; we use a conservative 35% for the headline figure and show the full range. WhatsApp reminders, which have higher open rates than email or SMS, tend to land at the higher end.
ROI compares the monthly recoverable revenue (at 35%) to the Conversify Starter plan ($29/month). It is a directional estimate, not a guarantee; your actual recovery depends on your appointment mix, reminder timing, and rebooking workflow.
