Chatbot ROI for a small business: the four numbers, the worksheet, and three worked examples

Vendors quote ROI in percentages nobody believes. A small business can do the sum honestly with four numbers it already has: how many enquiries go unanswered or late, what a customer is worth, how many hours a week go on repeat questions, and what the tool costs. Here is the worksheet and three examples.

By Ritchie, ReplyKit · Published 5 September 2026 · 6 min read

Quick answer

Monthly return equals recovered enquiries times customer value, plus hours saved times what your time is worth, plus no-shows avoided times slot value, minus the monthly fee. Estimate recovered enquiries conservatively as a share of the late or unanswered ones you measured. For most service businesses the sum is positive at $29 a month with a single recovered customer.

The worksheet Three worked examples Keeping it honest FAQ

The worksheet

Line	How to get it	Your number
A. Enquiries per month answered late or never	From the response-time exercise: count those over an hour or never
B. Share you expect to recover	Conservative: 20 to 30 percent
C. Value of one new customer	Average first purchase, or first year for repeat businesses
D. Hours a week on repeat questions	Honest estimate; most say 1 to 2
E. Value of your hour	What you would pay someone to do it
F. No-shows per month avoided by reminders	Half of current no-shows is conservative
G. Value of a slot	Average appointment value
H. Monthly fee	$29, $49 or $99
Return	(A x B x C) + (D x 4 x E) + (F x G) minus H

Three worked examples

Dental clinic. 60 late or unanswered enquiries a month, 25 percent recovered, first-year patient value RM 600: RM 9,000. 1.5 hours a week saved at RM 25: RM 150. 8 no-shows halved at RM 150 a slot: RM 600. Fee $29, about RM 130. Return roughly RM 9,600 a month.

Hair salon. 40 late enquiries, 25 percent recovered, first-year client value RM 400: RM 4,000. 1 hour a week saved: RM 100. 6 no-shows halved at RM 90: RM 270. Fee about RM 130. Return roughly RM 4,200.

Property agent. 80 late portal leads, 20 percent recovered, but only one in ten becomes a deal at RM 8,000 commission: 80 x 0.2 x 0.1 x 8,000 = RM 12,800. 2 hours a week saved: RM 400. Fee $49, about RM 220. Return roughly RM 13,000.

The numbers are illustrations with conservative recovery rates; yours will differ. The pattern does not: one recovered customer a month covers the fee for almost any service business. The cost guide covers the fee side, and the HBR research is why the recovery rate is not zero.

Keeping it honest

Use your measured late-enquiry count, not a guess.
Use a recovery rate below what you hope for.
Count only the first purchase unless you know repeat rates.
Re-run after a month with real numbers from the leads list: new leads, booked, won.

Frequently asked questions

How do I calculate chatbot ROI?

Recovered enquiries times customer value, plus hours saved times your hourly value, plus no-shows avoided times slot value, minus the monthly fee.

What recovery rate should I assume?

20 to 30 percent of late or unanswered enquiries is conservative for a business that then answers in seconds.

Is ROI positive for a very small business?

Usually, because one recovered customer a month covers a $29 fee.

How do I verify it after a month?

Compare new leads, booked and won on the leads list with the month before, and re-measure response time.

What costs are in the fee?

For ReplyKit, everything: AI replies, booking, reminders, CRM, website widget, on the official platform.

Run the numbers on a real month

Measure late enquiries, then start the trial and count the recoveries. 7-day free trial.

Start free

Written by Ritchie, ReplyKitPart of the small team in Malaysia that builds and runs ReplyKit. Writes about WhatsApp automation, AI customer service and small business lead response.

How we know this. We built this worksheet from the numbers ReplyKit customers actually track: enquiries by hour, booking rate, no-shows, and the monthly fee, and the examples use our real prices. Product figures in this article (limits, prices, per-reply costs) are taken from ReplyKit as it runs today and are re-checked when we update the page. Where we cite outside research, the source is linked below. We sell ReplyKit, so read our product claims with that in mind; we say where a different tool or no tool is the better choice. About ReplyKit.

Sources and further reading

Harvard Business Review, The Short Life of Online Sales Leads (Oldroyd, McElheran, Elkington, 2011) · firms that responded within an hour were about seven times more likely to qualify the lead
Lead Response Management Study (2007) · the five-minute window for contacting a new lead
ReplyKit, Will WhatsApp ban my number for automation? · how Meta's messaging limits and quality rating work

ReplyKit is an independent product and is not affiliated with or endorsed by Meta or WhatsApp. Worked examples use illustrative figures and conservative assumptions, not customer results. This article is general guidance, not financial advice.