WhatsApp chatbot ROI calculator

A chatbot pays for itself in two ways: it answers questions your team would otherwise answer, and it replies to leads when no one is free. The first is easy to measure. The second depends on your sales, so the calculator keeps it separate.

1. Support time saved

Take the tickets the chatbot can answer from start to finish, multiply by the minutes each one takes today, and you have the hours it frees up. Multiply by what an hour of agent time costs you and you have the value of that time.

For example, with the starting values above: 2,000 tickets × 30% × 15 minutes ÷ 60 = 150 hours a month. At $22 an hour that time is worth $3,300 a month. Change the share to 60% and both figures double. That is why the share is an input and not a fixed number.

2. Leads you answer that you miss today

If people message you at night or while your team is busy, some never get a reply. Count them for a month. A chatbot that answers them gives you more chances to sell. The calculator applies your own conversion rate to those leads and shows extra customers, not revenue.

3. What it costs

Add the chatbot tool’s monthly price and any WhatsApp message fees from Meta. Subtract the total from the staff cost saved. If what is left is positive over six months, the chatbot has paid for itself on support time alone.

• How repetitive your questions are. Prices, opening hours, delivery areas, order status and booking a slot are easy for a chatbot. Complaints, refunds and custom quotes are not. The more of the first kind you get, the higher the share it can answer.
• Whether the chatbot can see your data. A bot can only answer “where is my order?” if it can look the order up. Without that, it can only collect the details and pass them on.
• A clear handover to a person. Set rules for when the chat goes to your team: the customer asks for a person, the question is about money, or the bot has not solved it after a few replies. A bad handover costs more than it saves.
• What an hour of your team’s time costs. The same hours saved are worth more where wages are higher. Use the full cost, not just the salary, if you want the real figure.
• Whether saved time is used. Hours saved become money saved only when your team spends them on other work, or you need fewer new hires as you grow.

Since 1 July 2025, Meta charges per message for WhatsApp Business messages. Template messages are charged by category (marketing, utility and authentication) and by the recipient’s country, and Meta updates its rate cards from time to time.

For a support chatbot this matters less than it sounds. Replies sent inside the 24-hour customer service window, which opens when a customer messages you, are free. Utility templates sent inside that window are free too. Fees mostly come from messages you start yourself, such as reminders, follow-ups and promotions.

Check the current rates for your country on Meta’s WhatsApp pricing page, estimate how many template messages you send in a month, and enter the total in the calculator.

Write down these four numbers for the month before you switch the chatbot on, then compare each month after:

1. 1. Tickets the chatbot closed. The share of chats it resolved without a person stepping in.
2. 2. First reply time. How long a customer waits for the first answer, day and night.
3. 3. Agent hours. Time your team spent in chats, from your inbox reports or timesheets.
4. 4. Leads and sales from chatbot chats. Tag these so you can see how many became customers.

Put your real numbers back into the calculator. The estimate becomes a measurement.