Starting October 1, 2026, Meta will begin charging for every service message your business sends inside the WhatsApp Business API, regardless of whether the reply is written by a person, a chatbot, or an AI agent. Until now, once a customer messaged you first, a 24-hour service window<\/strong> opened where you could reply for free, as many times as you wanted. That benefit is going away.<\/p>\n\n\n\n For a B2B SMB in Chile or Brazil that relies on WhatsApp as its main sales and support channel, this means a new, recurring operating cost that isn’t in the budget today. The good news: there are almost two months to prepare, since Meta will publish the final per-country rates on September 1, 2026.<\/p>\n\n\n\n The current WhatsApp Business API model separates two kinds of messages: the ones your business initiates<\/strong> (marketing, utility, or authentication templates, already billed per template) and the ones your business replies with<\/strong> after a customer writes first. That second group \u2014service messages\u2014 has been free since 2022, with no cap, as long as it stays within 24 hours of the customer’s last message.<\/p>\n\n\n\n That’s exactly the volume support, sales, and post-sales teams rely on most: confirming an order, answering a pricing question, coordinating a delivery, closing a sale over chat. It’s the highest-value traffic \u2014 and starting in October, it becomes the most expensive.<\/p>\n\n\n\n Meta hasn’t confirmed the official rate yet \u2014 that lands September 1 \u2014 but several industry providers are already circulating estimates based on the utility-template pricing structure, which would serve as a reference point. Today’s figures put Chile, Argentina, and Peru among the most expensive countries in the region<\/strong>, near two US cents per service message, while Brazil would sit around US$0.0068 (roughly R$0.035) and Mexico near US$0.0085. Unlike templates, service messages reportedly won’t carry a volume discount: the rate would stay flat no matter how many messages you send per month.<\/p>\n\n\n\n Treat these numbers as planning estimates, not final figures. As soon as Meta confirms the official per-country rate, update your calculation and revisit your customer service budget for the last quarter of the year.<\/p>\n\n\n\n It’s easy to confuse this change with the Meta Business Agent charge that already took effect on August 1, 2026<\/a>, which bills by tokens for using Meta’s native AI agent inside WhatsApp. These are two separate, stackable charges: one is for the AI engine that drafts the replies, the other \u2014 the one arriving in October \u2014 is simply for sending any reply inside the service window, no matter who writes it. If your SMB runs its own chatbot, a third-party agent, or even human support staff, the October charge affects you all the same.<\/p>\n\n\n\nHow the 24-hour service window works today<\/h3>\n\n\n\n
How much it will cost to reply to a customer in Chile and Brazil<\/h3>\n\n\n\n
This is not the same charge as Meta’s AI Business Agent<\/h3>\n\n\n\n