To calculate the ROI of an AI receptionist, compare the revenue it recovers from otherwise-missed calls against its monthly cost. If recovered revenue exceeds the fee, you have positive ROI. Here's how to run that math on your own numbers in about five minutes.

Step 1: Estimate your missed calls

Look at a typical week. How many calls go unanswered — during jobs, after hours, on weekends, or while you're already on another line? If you're not sure, your phone records or carrier logs usually show missed and abandoned calls. Even a rough weekly number works. Call this M (missed calls per week).

Step 2: Apply your close rate

Not every answered call becomes a customer. Estimate what share of people who reach you actually book — one in three is a common starting point for service businesses. Call this your close rate (C). This keeps the calculation honest: you only count calls you'd realistically have won.

Step 3: Multiply by your average job value

Use your real average ticket — the typical revenue from one booked job or new patient. Call this V. For some trades that's a few hundred dollars; for others, several thousand.

The formula

(M × 4.3 weeks) × C × V = monthly revenue recovered
Monthly revenue recovered − monthly fee = your net gain

What does the ROI calculation look like in practice?

Suppose a plumbing company misses 6 calls a week, closes 1 in 3, and averages $450 per job:

  • 6 × 4.3 ≈ 26 missed calls/month
  • 26 × one-in-three ≈ ~8.6 recovered jobs
  • 8.6 × $450 ≈ ~$3,900 recovered per month
  • Minus a $597/mo plan = roughly $3,300 net gain per month

In this example, the service pays for itself after recovering just two jobs — everything beyond that is profit. Try it with your own M, C, and V. You can also use the interactive ROI calculator on our homepage.

What other returns should you factor in?

The direct revenue is the headline, but the ROI compounds in ways that are harder to put in a spreadsheet:

  • Reclaimed time — you stop dropping tools to answer the phone.
  • Better marketing efficiency — the leads you already pay to generate stop leaking to voicemail.
  • Repeat and referral revenue — customers you capture today refer others tomorrow.

The bottom line

ROI on an AI receptionist comes down to one question: does it recover more revenue than it costs? For most appointment-driven businesses that miss even a handful of calls a week, the answer is yes — often after just a job or two per month. Run your own numbers, then see exactly what's included at each plan.