The base ROI formula
ROI of an AI phone system equals the dollar value of recovered missed calls minus the subscription cost, divided by the subscription cost. The dollar value of recovered missed calls equals monthly inquiry volume multiplied by the miss rate, multiplied by the recovery rate (the share of previously missed calls that the AI now captures), multiplied by inquiry-to-tour rate, multiplied by tour-to-enroll rate, multiplied by customer lifetime value.
Conservative example, single-site daycare
A center taking thirty inquiry calls per month, missing fifty percent (industry typical for single-site centers), recovers ninety percent of those misses with the AI. That is roughly fourteen recovered inquiries per month. At forty percent inquiry-to-tour and thirty-five percent tour-to-enroll, the AI produces about two new enrollments per month. At a $1,500 monthly tuition and twenty-month tenure, those two enrollments are worth $60,000 in lifetime tuition. Against a $149 monthly subscription, that is roughly 400 times the monthly cost on a lifetime basis. On a monthly cash basis the ratio is lower but still material: roughly twenty times.
Realistic example, in-home family child care
A family child care home taking eight inquiry calls per month, missing seventy percent (typical because of active-supervision rules), recovers ninety percent. That is roughly five recovered inquiries per month. At fifty percent inquiry-to-tour and forty percent tour-to-enroll, the AI produces one new enrollment per month. At $1,200 tuition and twelve-month tenure, that is $14,400 in lifetime tuition against a $79 subscription, roughly fifteen times the monthly cost on a per-enrollment basis.
Small senior-care agency
A non-medical in-home senior care agency taking forty inquiry calls per month, missing forty percent, recovers ninety percent. That is fourteen recovered inquiries. At thirty percent inquiry-to-consultation and twenty percent consultation-to-client, the AI produces about one new client per month. At $4,500 monthly revenue per client and eighteen-month average tenure, that is $81,000 in lifetime revenue against a $349 subscription, roughly nineteen times monthly cost on a per-client basis. Senior care has higher ticket size, which moves ROI up materially.
What can lower ROI below these ranges
If the center already has a strong receptionist team that catches every call, the recovery rate (and therefore ROI) drops sharply. If the operator does not actually follow up on AI-captured leads in a timely fashion (within twenty-four hours), the inquiry-to-tour conversion falls and ROI follows. If the AI tool is poorly grounded in center-specific data and gives wrong answers, parents lose trust and ROI falls.
Where to find your own number
Log a single week of inbound inquiry calls, measure miss rate, and apply your real tour-to-enroll conversion and lifetime customer value. That number is the only ROI calculation that matters. Industry averages are a starting point, not the answer.
The honest caveat
These ROI ranges assume the operator continues to do everything else competently: tour, follow up, enroll, retain. An AI phone tool recovers missed inquiries, not poor sales execution. Centers with a weak tour or a long enrollment paperwork backlog will see a smaller lift.