WhatsApp for Sales: Rules, Templates and a Follow-Up Routine

In a large part of the world, WhatsApp is not one channel among many. It is where people already talk to their family, their neighbours and, increasingly, the businesses they buy from. In those markets, asking a customer to fill in a web form or wait for an email can feel like asking them to leave the room where the conversation is happening.

But WhatsApp is also the channel where careless selling is punished fastest. A customer can block you in one tap, and Meta, which owns the platform, watches how often that happens. This guide covers how to use WhatsApp for sales and customer follow-up properly: which product to use, the rules that decide what you can send and when, how to collect consent, three templates you can adapt, the tone that works, and a routine your team can run every week.

Meta changes its policies, categories and pricing from time to time, so confirm details in its current documentation.

Key takeaways

Why WhatsApp works for sales in the right markets

The case for WhatsApp is not that it is clever. It is that it is familiar. Customers open it many times a day, they are used to sending photos, voice notes and documents in it, and they expect a business message to look like any other conversation: short, personal and quick.

That familiarity helps sales in a few practical ways:

• Low friction. Replying takes a thumb, not a login. Customers can answer while commuting, between meetings or in a queue.
• Trust. A business that answers on the same app as the customer’s friends can feel more accessible, as long as it behaves like a person and not like a broadcast system.

The honest limit is habit. If customers already ask for your WhatsApp number, the channel is waiting for you. If nobody ever has, start with one small use, such as appointment reminders.

The free WhatsApp Business app versus the Business Platform

This is where most confusion starts, because both products carry the WhatsApp name and the same green icon.

The WhatsApp Business app

The Business app is free and runs on a phone. It adds a business profile, a catalogue, quick replies, labels and simple away messages. For a sole trader answering a few dozen chats a day, it can be entirely adequate.

The WhatsApp Business Platform (Cloud API)

The Business Platform is the version designed for companies. It does not come with a phone app of its own. Instead, you connect your number to software that sends and receives messages through Meta’s Cloud API. That software can be a shared inbox, a CRM or an automation tool, and several people can work the same number at once.

Teams usually outgrow the app in a predictable order: a second person needs to answer, history disappears with one phone, and nobody can find what was quoted. Move when those problems cost you replies, not before; it is a real change, with rules about templates and consent.

The 24-hour window: the rule that shapes everything

On the Business Platform, whether you can message a customer depends on when they last messaged you.

• Inside the window. When a customer sends you a message, a 24-hour window opens. During that time you can reply with any content: free text, images, documents, links, whatever helps. Every new message from the customer restarts the clock.
• Outside the window. Once 24 hours pass without a customer message, you cannot send free-form messages. You can send only a template message that Meta has already approved.

Templates: categories and approval

A template is a message you submit to Meta in advance. It has fixed wording and placeholders (variables) for the parts that change, such as a name, a date or an order number. Meta reviews it, and once approved you can send it outside the 24-hour window.

The categories, in general terms

Templates are grouped into categories, and the category affects both how the message is treated and how it is priced. At the time of writing, the broad groups are:

• Utility. Messages about something the customer has already asked for or agreed to: a booking confirmation, a delivery update, an appointment reminder, a receipt.
• Marketing. Messages whose purpose is to promote: an offer, a product announcement, a re-engagement nudge.
• Authentication. One-time passcodes and similar verification messages.

Meta decides the category from the content, so a reminder that hides a sales pitch may be treated as marketing. Templates can be rejected, recategorised or paused, and nobody can promise approval. Rules change, so read Meta’s current documentation. Write plainly, keep each template to one purpose and use realistic sample values.

Opt-in: collect it properly

Opt-in means the customer has clearly agreed to hear from you on WhatsApp, and you can show when and how.

Ways to collect it

• A checkbox on a form. Add an unticked box next to the phone field, with wording such as “Send me updates about my booking on WhatsApp”. Say what the messages will be about. Do not pre-tick it.
• Click-to-chat. A button or link on your website, ad or QR code that opens a WhatsApp conversation with you. The customer starts the conversation, which also opens the 24-hour window. Confirm in the first reply what they can expect from you.
• In conversation. If a customer is already talking to you, ask plainly: “Would you like booking reminders here on WhatsApp?” A clear yes is your record. Note it where your team can find it.

Store the date, source and wording of each opt-in. If a customer writes “stop” or anything similar, mark them opted out straight away and send nothing further outbound.

What Meta charges

Meta’s pricing for the Business Platform has changed over time. It was previously organised around conversations, and has since moved towards pricing by template message and category. It may change again. Rather than quote numbers that will go out of date, here is how to think about it:

• Replies inside the service window are the cheap end. Meta’s model has treated customer-initiated conversations differently from business-initiated ones. Check the current price list for exactly what is charged.
• Template messages are where cost appears. The category (utility, marketing, authentication) and the recipient’s country can both affect the rate.
• Your software has its own fees. Meta’s charges and your CRM or inbox vendor’s charges are separate, so cost both when you compare options.

Three templates worth writing first

The best first templates are the ones that serve customers who have already shown interest or bought. Each example below uses numbered variables in double braces, which is how templates mark the parts that change. Adapt the wording to your voice, and expect Meta to classify and review them on its own terms.

1. Appointment reminder

2. Quote follow-up

It reminds without pressure and asks one open question.

3. Booking or order update

Tone: short, human, one question at a time

Most WhatsApp conversations that go badly go badly in tone, not technology.

• One question per message. Three questions invite a reply to the easiest one and silence on the rest.
• Voice notes, sparingly. A short voice note can feel warm for a complex explanation, but many people cannot listen at once, and a voice note is hard to search later. Use them when the customer does, and follow with a written summary.

Sharing quotes, documents and payment links

• Quotes. Send the PDF with one line of context, then name the next step. “Here is the quote. If it looks right, reply and I will book you in.”
• Payment links. Send the link in its own short message so it is easy to find, and say what it is for and what the amount covers. Customers are cautious about links from businesses they do not know, so make sure the message makes clear who you are and why you are sending it.

When several people share the number, name one owner per conversation, leave a one-line internal note at each handoff, and tell the customer who is picking up so they never repeat themselves.

Quality rating, blocks and reports

On the Business Platform, Meta monitors signals about how recipients receive your messages, including blocks, reports and how often people respond. Those signals feed into a quality rating for your number. A poor rating can lead to limits on how many people you can message, and repeated problems can lead to restrictions. The precise thresholds and consequences are Meta’s to define and revise, so check them in its documentation.

What matters in practice is that the risk is shared. Every careless campaign affects the number your support and sales replies also use. Habits that protect it:

• Message only people who opted in, about what they opted in for.
• Make opting out as easy as opting in, and act on it at once.
• Send fewer, more relevant messages rather than more frequent ones.
• Make sure a real person can answer when the customer replies. A message that invites a reply and then ignores it is a fast route to a block.
• Watch the quality indicator in your account, and slow down if it slips.

What not to do

• Do not cold-blast purchased numbers. People who never heard of you will report you, and you will have no opt-in to show. This is the quickest way to damage a number and the weakest way to sell.
• Do not send walls of text. A paragraph of features is an email wearing a chat costume.
• Do not use a no-reply number. If a customer cannot answer, they will block instead. Every outbound template should welcome a response, with a human behind it.
• Do not hide marketing in utility messages. It risks rejection and erodes trust.
• Do not message at unsociable hours. Even an opted-in customer does not want a reminder at midnight.
• Do not automate everything. Automation suits reminders and updates. It is poor at negotiation, complaints and anything emotional.

How Scalry handles this

Scalry connects WhatsApp through Meta’s official Embedded Signup flow. You log in with Meta, create or choose your WhatsApp Business account, verify the phone number, and Scalry connects to the WhatsApp Cloud API. You are using the official platform rather than a workaround, so the rules in this guide apply as written.

On costs, two things are separate. Meta bills its template message charges to your own WhatsApp Business account. Scalry charges its own credit-based fees for WhatsApp access and outbound messages, so check the current credit costs in your plan. Scalry does not charge credits for replies inside the service window.

WhatsApp conversations appear in Scalry’s shared inbox alongside SMS, email and other channels, so your team works one queue instead of juggling apps. WhatsApp messages are logged as activities on the contact timeline, which means whoever picks up a customer next can see what was said before. Review requests can also be sent over WhatsApp, for customers who prefer that channel.

To be plain about the limits: Scalry does not decide whether Meta approves a template, and it cannot make a message welcome. It gives you a proper connection, a shared place to work and a record on the contact. The consent, the tone and the follow-up are still yours.

Questions to ask before you commit

Whichever way you are leaning, these are the questions that change the answer. Work through them against your own numbers rather than anyone's feature matrix — including this one.

• Do our customers actually use WhatsApp with us? Look at existing enquiries before you build anything.
• Is more than one person answering? If so, the free app is probably already costing you replies.
• Can we show how and when each customer opted in? If not, fix that before sending anything outside the window.
• Who owns each conversation right now? A conversation without a named owner is one nobody will chase.
• What do we send after 24 hours of silence? If the answer is nothing, you have no follow-up.
• Have we checked Meta’s current template rules and price list? Do not rely on a blog post, including this one.

If you cannot answer the first three, you are not ready to choose between Scalry and your WhatsApp setup yet — you are still deciding what you need, which is a cheaper problem to solve first.

A one-week setup plan

• Day 1: pick one or two jobs, such as new enquiries and appointment reminders. Skip promotions for now.
• Day 2: choose a number you can keep long term and complete Meta’s sign-up and verification.
• Day 3: add the opt-in checkbox and a click-to-chat link, and agree how staff record consent and handle “stop”.
• Day 4: submit the three templates early, since approval takes time and may need edits.
• Day 5: write one page covering response hours, who owns new enquiries, how handoffs are noted and what never to send.
• Day 6: message the number from a personal phone and check routing, variables and opt-out.
• Day 7: go live with opted-in customers only, review the first week together and then widen use.

Frequently asked questions

Can I use WhatsApp for sales without the Business API?

Yes, with the free WhatsApp Business app, which suits one person or a very small team on one phone. Once several people need to answer, or you want automation and a record on each contact, you will usually move to the Business Platform (Cloud API).

What is the 24-hour window?

When a customer messages your business, a 24-hour window opens during which you can reply with any content. Each new customer message restarts it. After it closes, you can only send pre-approved template messages until they write again.

Do I need permission to message customers on WhatsApp?

Yes. Get clear opt-in, record when and how it was given, and stop promptly if the customer opts out. Consent laws also vary by country, so check yours.

What types of WhatsApp message templates are there?

In general terms: utility (updates about something the customer asked for), marketing (promotion) and authentication (one-time codes). Meta decides the category from the content and has changed its rules before, so check its current documentation.

How much does WhatsApp Business messaging cost?

Meta charges for some messages, mostly templates, with rates that depend on category and country. Its pricing has changed before, so use Meta's current price list. Your software provider will have its own fees on top.

How do I avoid being blocked or reported?

Message only people who opted in, keep messages short and relevant, make opting out easy and make sure a real person answers replies. Blocks and reports affect your quality rating, which can limit what you are allowed to send.

How many times should I follow up on WhatsApp?

There is no official rule. A small fixed number works best: answer quickly, check in once after a quote, send one helpful nudge a few days later, then stop and respect the silence.