Meta's WhatsApp Business Platform is changing how it bills messages starting 1 October 2026. The core shift: WhatsApp moves from billing per 24-hour conversation to billing per individual message you send. Here's what changes, in plain terms — with Sri Lanka's converted rates.
The one thing that actually changes
Everything below flows from this single switch in how Meta counts what you send.
Free-form replies inside the 24-hour service window don't cost anything, no matter how many you send.
Every delivered message is a billing unit — after the first 1,000 free per phone number, each month.
What each message category costs now
Four categories, four different stories.
| Category | Before | After 1 Oct 2026 |
|---|---|---|
| Service | Free, unlimited | Rs 0.66 / msg past 1,000 free |
| Utility | Rs 3.71 / msg (old APAC rate) | Rs 0.66 / msg (▼ 82% for Sri Lanka) |
| Authentication (OTP) | Rs 3.71 / msg, one rate | Rs 0.66 domestic · Rs 47.25 international |
| Marketing | Rs 24.02 / msg | Rs 24.02 / msg — unchanged |
Messages, not conversations
Meta counts every outbound bubble your agent sends — not the customer chat as a whole. The same conversation can cost several times more depending on how a reply is split.
"Hi!" · "Can you share your order number?" · "Thanks" · "Let me check that" → 4 billable service messages
"Hi! Sure — could you share your order number so I can check it?" → 1 billable service message
Sri Lanka's rate card, in rupees
Converted at ≈ Rs 328.14 / USD. Sri Lanka moves out of the "Rest of Asia Pacific" bucket into its own market on 1 Oct 2026.
| Category | USD / message | ≈ LKR / message | Free allowance |
|---|---|---|---|
| Service (in-window reply) | $0.0020 | Rs 0.66 | 1,000 / number / month |
| Utility (alerts, updates) | $0.0020 | Rs 0.66 | None |
| Authentication (domestic OTP) | $0.0020 | Rs 0.66 | None |
| Authentication (international OTP) | $0.1440 | Rs 47.25 | None |
| Marketing | $0.0732 | Rs 24.02 | None |
What this means day to day
- Ordinary support replies stay cheap — 1,000 free per WhatsApp number every month, then about Rs 0.66 each after that.
- Utility and domestic OTP messages actually got cheaper for Sri Lanka — roughly an 82% cut from the old regional rate.
- Marketing is the line to watch and meter carefully: at ~Rs 24 a message, it's the category that can run up a bill fast.
Figures reflect Meta's published Sri Lanka rate card effective 1 October 2026, converted at ≈ LKR 328.14 = USD 1. Meta finalises country rate cards by 1 September each cycle — confirm exact figures against Meta's official WhatsApp Business Platform pricing page before quoting customers.