WhatsApp Business API cost for clinics in India How Meta charges per message, what the template categories mean, and what a small OPD actually needs to send.

WhatsApp Business API messages cost a clinic whatever its software vendor charges for them, built on Meta's per-message rates. Meta's pricing page for the WhatsApp Business Platform, which says it reflects pricing updates effective 1 October 2026, states that "Meta charges by category–market, and only for messages from businesses to users" and that "Businesses are only charged when a message is delivered. Meta does not charge for messages sent." The market is the recipient's country, and rates are published on Meta's rate cards by category, with rupee billing for Indian accounts.

This post is about cost and mechanics. The rules on what a clinic may say to a patient on WhatsApp, under the NMC's conduct and advertising rules and the DPDP Act, are in our post on WhatsApp for clinics under NMC and DPDP rules, and the opt-in and token mechanics are in OPD token systems.

How does Meta charge for WhatsApp Business messages?

• Per message, on delivery. Meta's page: "Businesses are only charged when a message is delivered." A message to a number that is not on WhatsApp costs nothing because it is not delivered.
• By category and market. The three template categories on Meta's page are "Marketing – template messages for promotional objectives", "Utility – template messages for transactional or informational objectives" and "Authentication – template messages for identity verification objectives". Each has its own rate per market.
• Service messages are different. Meta defines them as "Any non-template message not powered by the Meta Business Agent Platform", and says "Meta provides 1,000 free service messages per month, which do not roll over but reset monthly", charging from the 1,001st per phone number.
• The customer service window. When a patient messages the business, a 24-hour window opens. Meta's page: "Businesses can only send non-template messages to users when this window is open. If it is not open, businesses can only send template messages to reach out to users."
• Free entry point. If a user messages from a Click to WhatsApp ad or a Facebook Page button on the Android or iOS app and the business replies within the window, a free entry point opens during which Meta does not charge for marketing, utility, authentication or service messages. This is an advertising feature and rarely relevant to a clinic.

Meta does not print India's per-message rupee rates on the pricing page itself; they are in downloadable rate cards and an interactive table on the WhatsApp Business site. The page does note that India's marketing rate changed on 1 January 2026 and its international authentication rate on 1 April 2026, and that eligible Indian customers must move their messaging accounts to INR billing by 31 December 2026. Check the live rate card for the number on the day; we have not reproduced a figure here because it changes.

What do the template categories mean for a clinic?

Anything the clinic sends first, before the patient has messaged it that day, is a template. Meta's developer documentation says "Each template must be categorized as authentication, marketing, or utility" and "Templates must have a status of APPROVED before they can be sent in template messages." Templates are reviewed on creation, and review "can take up to 24 hours". Meta notes that "template categories also factor into pricing", and points to a categorisation guide on what can happen when a template is miscategorised.

The category a vendor's templates are actually approved under is set when the vendor submits them. Ask. Meta's pricing page also notes that from 1 October 2026 utility templates sent inside an open customer service window moved from the free pricing type to regular, which means they are charged; a vendor's cost assumptions from before that date may be out of date.

Does TRAI or DLT registration apply to WhatsApp messages?

Not in the way it applies to SMS. TRAI's Telecom Commercial Communications Customer Preference Regulations, 2018 are written as obligations on Access Providers, the telecom operators, and regulation 3 as substituted in 2025 requires each one to ensure "that any commercial communication using its network takes place only using registered headers" on the DLT platform. A WhatsApp message travels over the internet through Meta's platform and uses a WhatsApp business number and an approved template, not a telecom SMS header. The registration, header and template rules for SMS are covered in our post on DLT registration for clinic SMS; what governs WhatsApp content is Meta's own Business Messaging Policy, the NMC's rules on what a doctor may communicate, and the DPDP Act on the patient's data.

Two lines from Meta's policy matter for a clinic. The policy, last updated 23 September 2026, says a business may only contact people if "you have received opt-in permission from the recipient confirming that they wish to receive subsequent messages", and in its data section: "Don't use WhatsApp for telemedicine or to send or request any health related information" where applicable regulations prohibit sending such information to systems that do not meet heightened requirements. Meta's opt-in page adds that businesses "must clearly state the business's name that a person is opting in to receive messages from" and accepts opt-in by SMS, website, phone, or "In person or on paper".

What does your software vendor charge on top?

Most clinics never see Meta's invoice. The software company holds the WhatsApp Business account, pays Meta, and either includes messages in the plan or bills them. The questions for any vendor are the same, and the answers belong in writing.

1. Are WhatsApp messages included in the plan, and up to how many a month?
2. What is the price per message above the cap, and is it the same for utility and marketing templates?
3. Which events send a message: every token, every status change, or only the call to the cabin? Three messages per visit triples the bill.
4. Whose WhatsApp number do patients see, the clinic's or the vendor's, and what happens to that number if you leave?
5. Is there an SMS fallback when a patient is not on WhatsApp, and what does that cost?
6. Does the clinic get a per-message report it can reconcile against the invoice?

Multiply the per-message price by messages per visit, visits per day and working days, and add it to the yearly worksheet in our post on free versus paid clinic software.

What does a small OPD actually need to send?

Less than the demo suggests. The message that earns its cost at a 1 to 3 doctor OPD is the token: the patient's number in the queue and when they are called, so the waiting room can empty into the street and the chai shop. An appointment confirmation helps a clinic that books slots. Everything else, from birthday wishes to health tips, is a marketing template with a marketing rate and an NMC advertising question attached. Start with the token, measure the bill for a month, and add nothing until a patient asks for it.