In this article
Many businesses want to answer questions, confirm orders and send reminders on WhatsApp. Done well, automation saves your team hours. Done badly, it annoys customers and can get your number restricted. This guide covers the options, Meta's rules and a sensible way to start. It follows Meta's documentation as we read it on 19 October 2026. Rules and prices change, so check the pages named at the end before you build.
Two ways to use WhatsApp for business
The WhatsApp Business app is built for small business owners. It includes greeting messages and away messages. Start here if you only need simple replies.
The WhatsApp Business Platform is for businesses that want to message customers at scale. Meta writes its documentation for developers who use its APIs. An API is a way for one program to talk to another, so your billing, bookings or CRM (customer relationship management) tool can send and receive WhatsApp messages. The rest of this guide is about the Platform.
What you can automate
Common uses, given as examples only:
Order, booking and payment confirmations.
Appointment, delivery and renewal reminders.
Answers to common questions, such as opening hours or order status.
Collecting a few details from a new enquiry and passing them to the right person.
Handing the chat to a person when the question is difficult.
Rule 1: Get opt-in first
Meta says businesses must get a person's opt-in before messaging them on WhatsApp. The opt-in must clearly say that the person agrees to hear from your business, and must name the business. You choose the method: Meta lists SMS, a website, a phone call with an automated menu, and in person or on paper. Opt-in can be general rather than specific to WhatsApp, as long as you follow all local laws. Meta also advises a separate opt-in for each type of message, and clear opt-out instructions that you honour. WhatsApp's Business Messaging Policy says you must respect requests to block, stop or opt out. Keep a record of when and how each person agreed.
Rule 2: Know the 24-hour window
When a person messages you, a 24-hour timer called the customer service window starts. It restarts each time they message you again. During the window you can send free-form replies with no pre-approval. When the window closes, you can only send pre-approved template messages.
Rule 3: Templates need approval
A template is a message with fixed wording and blanks to fill, such as 'Hello {{1}}, your order {{2}} has shipped.', where {{1}} and {{2}} are the blanks. Meta reviews each template automatically when you create or edit it. Review can take up to 24 hours, and only approved templates can be sent. Each template is one of three types: marketing, utility (a follow-up to something the person did or asked for) or authentication (to verify identity).
Templates are rated on customer feedback and read rates. A template with repeated negative feedback or low read rates can be paused or disabled, and then it cannot be sent.
Rule 4: Limits and quality
A messaging limit caps how many different people you can message outside the 24-hour window. Meta counts unique phone numbers over a moving 24-hour period. A new business portfolio (your business's account with Meta) starts at 250. The steps then run to 2,000, 10,000, 100,000 and unlimited. One way to reach 2,000 is to verify your business with Meta, and Meta can raise the limit automatically if your messages are high quality and you are using your current limit. All numbers in a portfolio share the limit. A business phone number can also send up to 80 messages per second by default.
Quality matters because people can block or report businesses. Meta says spam, repeated violations and excessive negative feedback can lead to warnings, temporary restrictions or removal from the platform.
Rule 5: Automation needs a way to reach a person
WhatsApp's Business Messaging Policy says you may use automation when replying during the 24-hour window, but you must also offer prompt, clear and direct escalation paths, such as transfer to a human agent. It also says not to ask people to share full payment card numbers, financial account numbers or personal ID card numbers.
What does it cost?
Meta charges per delivered message, by message type and the country of the person you message. It changed some pricing rules on 1 July 2025 and again on 1 October 2026, so older articles may be out of date. We give no prices here. Read Meta's current pricing page before you plan a budget.
Think about privacy
Names and phone numbers are personal data. Where you rely on consent, data protection laws such as the GDPR in the European Union and India's DPDP Act expect you to be able to show that you gave notice and got consent. Under the DPDP Act, the main duties for businesses start on 13 May 2027. Whichever law applies to you, treat each opt-in as a consent record from day one.
How to start
Choose one job with clear steps, such as appointment reminders.
Collect and record opt-in from the people involved.
Write the templates you need and send them for approval.
Build the flow, with an easy way to reach a person.
Test with your own team, then a small group, and watch for blocks and complaints. Grow only when the numbers look healthy.
What to do next
If you want WhatsApp connected to your booking, billing or CRM system, send us your requirement. We reply with a written proposal showing scope, timeline and quote, at no cost until you agree. Where a flow uses AI, AI drafts and people decide.
Sources, checked on 19 October 2026. Meta for Developers (developers.facebook.com), WhatsApp Business Platform documentation: Get opt-in for WhatsApp; Service messages; Template fundamentals; Template categorization; Messaging limits; Throughput; About the platform; Policy and spam enforcement; Pricing. WhatsApp Business Messaging Policy, last updated 23 September 2026 (whatsappbusiness.com/policy). WhatsApp Business app page. Digital Personal Data Protection Act, 2023, and notification G.S.R. 843(E), meity.gov.in. Regulation (EU) 2016/679, the General Data Protection Regulation, Article 7 (eur-lex.europa.eu).