The WhatsApp Business Platform, explained
Everything you need to message customers on WhatsApp the right way — how the platform works, what it costs, how templates get approved, and how to scale without hurting your quality rating.
Fundamentals
How messaging works
WhatsApp splits business messaging into two modes. Understanding the difference is the key to both compliance and cost.
The 24-hour service window
When a customer messages you first, a 24-hour window opens. Inside it you can reply freely, in your own words — no template, and these service replies are free.
Template messages
To start a conversation, or to message someone outside the 24-hour window, you must use a pre-approved template. Templates are how you send broadcasts, reminders and notifications.
Rule of thumb: the customer’s message opens a free window; you re-open the conversation with a paid template.
Costs
How pricing works in 2026
On July 1, 2025 Meta moved from conversation-based pricing to per-message pricing. Instead of one fee covering a 24-hour conversation, each delivered template message is now billed individually — priced by its category and the recipient’s country.
Promotions, offers, product launches, re-engagement.
Billed on every delivery — the priciest category, no free window.
e.g. ~$0.01 (India) to ~$0.12 (Germany) per message
Order updates, shipping, receipts, payment reminders.
Free when sent inside an open 24-hour service window; otherwise low-cost.
Volume tiers lower the rate as you send more
One-time passcodes and login/verification codes.
Low per-message cost with volume-based pricing tiers.
Cheapest template category in most markets
Free-form replies to a customer inside the 24h window.
Free under the current per-message model.
No template needed — reply in your own words
Figures are illustrative — Meta’s exact rates vary by country and change over time. Always check current rates for the markets you send to.
Templates
Getting templates approved
Every template you send is reviewed by Meta. Most rejections come down to a handful of avoidable mistakes. Here’s how to get approved the first time.
Pick the right category
Label the template honestly — Marketing, Utility or Authentication. Sending a promo under a utility label is the fastest way to a rejection or a quality penalty.
Be specific, not spammy
Avoid vague, all-caps, “click here now!!!” copy. Clear placeholders, real content and a concrete purpose sail through review.
Format your variables
Number your placeholders in order ({{1}}, {{2}}…), don’t start or end the body with a variable, and provide sample values so the reviewer can see the finished message.
Scale
Messaging limits & quality rating
WhatsApp grows your sending capacity in tiers as you prove healthy engagement. Since October 2025, these limits are shared across your whole business portfolio rather than per phone number.
Your quality rating
Meta scores each number High (green), Medium (yellow) or Low (red) based on blocks, spam reports and negative feedback. To climb a tier you generally use at least 50% of your limit over seven days while holding a Medium-or-High rating. A Low rating won’t drop your tier, but it freezes you from moving up.
Compliance
Opt-ins & staying compliant
WhatsApp is an opt-in channel. Before you message anyone, you need clear consent — and keeping that consent clean is what protects your account long-term.
- Collect explicit opt-in — a checkbox, a keyword, or a form where the person knowingly agrees to hear from you on WhatsApp.
- Tell people what they’re signing up for and roughly how often you’ll message them.
- Keep a record of when and how each contact opted in.
- Honour opt-outs immediately and make them easy to trigger.
- Only use approved templates to start conversations outside the 24-hour window.
Playbook
Best practices that actually move the needle
Warm the number up
Don’t jump from zero to thousands overnight. Ramp volume week over week so Meta sees healthy, consistent engagement before you scale.
Segment before you send
Message the people most likely to care. Tight, relevant lists get fewer blocks and reports than one giant blast to everyone.
Lead with utility
Order updates, reminders and receipts drive engagement and often ride the free service window. Blend them with marketing rather than sending promos alone.
Make opting out easy
Honour stop requests instantly. A visible, respected opt-out keeps block rates down and protects your quality rating.
Personalise the first line
Use the customer’s name and context. Generic bulk copy reads as spam — to people and to Meta’s quality signals alike.
Watch quality daily
Track your green/yellow/red rating and block rate. Catching a dip early lets you fix messaging before it caps your growth.
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