In much of the world, people would rather WhatsApp a business than call it or fill in a form. In the US, plain texting usually wins. This lesson helps you work out which camp your customers are in. If WhatsApp fits, it walks through the rules and the pricing, so a blocked message or a surprise bill doesn't catch you out.
Not legal advice. Pricing and rules here are as of October 2026 and change often; check Meta's pricing page before budgeting.
Does WhatsApp fit your customers?
Go by usage figures for the countries you actually operate in:
| Country | WhatsApp use | Source |
|---|---|---|
| United States | 32% of US adults say they use WhatsApp (Feb-June 2025) | Pew Research Center survey of 5,022 adults |
| United Kingdom | Reached 90% of UK online adults in May 2025; 74% used it daily | Ofcom, Online Nation 2025 (Ipsos iris data) |
For comparison, the same Pew survey found 71% of US adults use Facebook. So in the US, WhatsApp is a handy extra channel for some customers and rarely the main one. In the UK it's close to universal. We haven't cited figures for other countries, so check a national regulator or statistics office before you assume.
The cheapest test is to ask your front desk how many customers already message you on WhatsApp. Or put a "Message us on WhatsApp" button on your website for a month and count the chats.
The two ways to use WhatsApp for business
- WhatsApp Business app: an app on a phone. Fine for one or two people replying by hand.
- WhatsApp Business Platform (often called the API): for software, shared inboxes, automation and higher volumes. Usually accessed through a provider. The pricing and template rules below apply to the Platform.
The 24-hour customer service window
Meta's pricing page says: "When a WhatsApp user messages you or calls you, a 24-hour timer called a customer service window starts." It resets each time they message again.
- Inside the window: you can send normal free-form replies (Meta calls these service messages).
- Outside the window: you can only send an approved message template. Meta's template docs say templates "are the only type of message that can be sent to WhatsApp users outside of a customer service window."
So if a customer asks for a quote on Monday and you reply on Wednesday, your reply has to be a template, not a free-form message.
Template categories
Every template sits in one of three categories, and the category sets the price:
| Category | Meta's description | Local example |
|---|---|---|
| Marketing | The most flexible; for a "wide range of goals" | "Spring AC tune-ups are open, book this week" |
| Utility | "Typically triggered by a user action or request" | "Your appointment is confirmed for Tue 3 p.m." |
| Authentication | Verifying identity, usually with a code | "123456 is your verification code" |
Templates are reviewed when you create or edit them; Meta says the "In-Review" status in WhatsApp Manager can last up to 24 hours. Meta checks the category too. Dress a sales pitch up as a utility template and Meta will move it to Marketing, usually after a day's notice. Do it repeatedly and your utility templates can be restricted.
Pricing: what changed in 2025 and 2026
For rates in rupees, GST and provider markups in India, see WhatsApp Business API pricing in India.
Meta has changed WhatsApp pricing twice recently. According to its pricing page:
July 1, 2025: per-message pricing. "Meta charges on a per-message basis," for delivered messages from businesses to users, by category and market. Messages from customers to you aren't charged.
October 1, 2026: more messages became billable.
- Service messages (free-form replies inside the 24-hour window) are now charged after a free tier: "Each business phone number has one free tier of 1,000 delivered service messages per month." Meta says businesses without a payment method on file by September 30, 2026 risked service messages stopping.
- Utility templates sent inside an open window, which had been free since July 2025, are charged again from October 1, 2026.
- Meta updated 40 rates on its rate card on the same date.
Free entry points. When a customer messages you from a click-to-WhatsApp ad (in the Android or iOS app), a free entry point window opens. Meta doesn't charge for messages during it if you reply within the customer service window, and Meta says the window "may remain open for up to 7 days."
Rates vary by country and category. Meta publishes them as rate cards linked from its pricing page. We don't quote them here because they keep changing. Check the current card for your market, then add your provider's fees.
A local example: a UK dental practice
A dental practice in Manchester gets most of its enquiries on WhatsApp.
- Uses the Business Platform through a provider so three receptionists share one inbox.
- Replies to new enquiries within minutes, inside the 24-hour window, using free-form service messages. At a few hundred conversations a month it stays within the 1,000 free service messages per number.
- Sends appointment reminders the day before as utility templates ("Your appointment at [Practice] is tomorrow at 10:30. Reply C to confirm or R to rearrange."), without naming the treatment.
- Sends a twice-yearly check-up reminder campaign only to patients who agreed to marketing, as a marketing template.
- Reviews its monthly bill against Meta's rate card for the UK.
Opt-in and consent
WhatsApp's Business Messaging Policy says you may only contact people on WhatsApp if they've given you their number and you've received opt-in permission confirming they want to receive messages from you. It also says to provide clear opt-out instructions, to "respect all requests (either on or off WhatsApp)" to opt out, and not to "spam, or surprise people."
Local law sits on top of that:
- UK: the ICO's PECR guidance treats texts and similar electronic messages, including direct messages, as "electronic mail"; marketing needs specific consent, or the "soft opt-in" for existing customers who bought something similar and were offered an opt-out each time.
- EU: rules on electronic marketing are applied country by country; check with your national data protection authority before sending marketing messages.
- Australia: the ACMA requires consent, sender identification, and unsubscribes honored within 5 working days for commercial messages.
- US: if you use WhatsApp with US customers, the same consent principles as texting are a sensible baseline; see Texting customers in the US.
A good opt-in line for a booking form:
[ ] Send me appointment updates on WhatsApp. [ ] (Optional) Also send occasional offers on WhatsApp.
Do this now
What is the WhatsApp 24-hour window?
When a customer messages or calls you, a 24-hour customer service window opens. Inside it you can reply freely; outside it you can only send approved message templates.
Are WhatsApp service messages free?
Not entirely, as of October 1, 2026. Meta gives each business phone number 1,000 free delivered service messages a month and charges per message after that.
What are WhatsApp template categories?
Marketing, utility and authentication. Utility templates are triggered by a customer's action, like a booking confirmation. Meta can recategorize a utility template as marketing if it contains promotional content.
Is WhatsApp worth it for a US small business?
Usually as a secondary channel. Pew found 32% of US adults use WhatsApp in 2025, compared with 71% for Facebook. Texting is often the better default in the US.
Do click-to-WhatsApp ads make messages free?
Conversations that start from a click-to-WhatsApp ad open a free entry point window, which Meta says can stay open for up to 7 days, if you reply within the customer service window.
Sources
- Pricing on the WhatsApp Business Platform, Meta for Developers (checked Oct 2026)
- Message templates overview, Meta for Developers (checked Oct 2026)
- Template categorization, Meta for Developers (checked Oct 2026)
- WhatsApp Business Messaging Policy, WhatsApp (checked Oct 2026)
- Americans' Social Media Use 2025 (survey of 5,022 US adults, Feb-June 2025), Pew Research Center (checked Oct 2026)
- Online Nation 2025 report, Ofcom (checked Oct 2026)
- Ofcom finds UK adults now spend over 4.5 hours online each day (Online Nation 2025 summary), ISPreview (checked Oct 2026)
- Electronic mail marketing (PECR), ICO (checked Oct 2026)
- Avoid sending spam, ACMA (checked Oct 2026)
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