Two separate value streams, not one
An AI chatbot's ROI comes from two genuinely different sources that are easy to conflate into one number: time saved on enquiries you were already answering, and revenue from leads you were previously losing entirely. The staff-time savings side is straightforward — routine, repeatable questions (hours, pricing, availability) answered instantly instead of manually, freeing up staff hours at their loaded hourly cost. The after-hours capture side is arguably more valuable and more often ignored in ROI conversations: enquiries that arrive outside business hours frequently go unanswered until the next working day, or get lost entirely to a faster-responding competitor, and a 24/7 bot captures and responds to these the moment they arrive.
The most effective real-world model is a bot handling the routine, repeatable share of enquiries with staff handling anything complex, sensitive or genuinely novel that the bot escalates — not a full staff replacement, which is why this calculator asks for the percentage of enquiries the bot can realistically answer rather than assuming 100%. Setup cost varies significantly by scope (a simple FAQ bot vs. a bot integrated with booking/CRM systems), so replace the default with your actual quoted figure for an accurate payback estimate.
See AI automation for how this typically gets built and deployed, and WhatsApp automation if your enquiry volume is primarily WhatsApp-based rather than website chat.