What changes in October

Starting from October 1, 2026, Meta will begin charging for service messages on WhatsApp Business, a category that is currently free. For businesses that use WhatsApp as their main sales and support channel, this directly changes the operational cost of customer service, according to a report from E-Commerce Brasil.

The change affects not only those who send campaigns. It also impacts those who respond to customers, as the billing logic now considers every response given outside the flow initiated spontaneously by the customer.

The three categories of message

The WhatsApp Business organizes messages into three categories, and it is this classification that defines what is charged:

  • Marketing: messages that promote the brand or a product.
  • Utility (utility): messages that resolve a customer's problem proactively, such as a second utility bill or order status.
  • Service: non-template responses given in reaction to something the customer brought up in the conversation. This category will start being charged in October.
D
Tip

Messages of utility within the 24-hour window will also start being charged per unit. Reviewing which category each automated flow fits into is the first step before October.

Who Pays: The Logic of Billing

The central rule is simple to understand but easy to underestimate in daily life: billing falls on the responder, not the initiator of the contact. When the customer initiates the conversation, neither the customer nor the brand pays anything for that first message. The cost appears when the company responds.

Each response from the brand generates a new cost within the logic of categories. An important detail for companies that use both bots and human support: transferring the conversation from an AI to a human agent does not interrupt the billing - the meter continues to run normally.

The 72-hour window of Click to WhatsApp

There is a relevant exception for those using ads. Ads of the type Click to WhatsApp open a 72-hour free window, valid even for service and utility messages responded to within this period. This changes the way the cost of campaigns that lead to direct conversation is calculated.

A
Attention

The 72-hour window applies to conversations initiated from a Click to WhatsApp ad. Outside of this flow, the standard charging rule for responses applies normally.

How to reduce the impact: three fronts

The E-Commerce Brasil report highlights three practical fronts for businesses to prepare before October.

1. Review the opening service scripts. The goal is to reach the real customer demand faster without sacrificing courtesy. More objective conversations reduce the number of responses needed to resolve the issue, which reduces the accumulated cost per service interaction.

2. Segment the base by contact temperature. Hot contacts (who have interacted recently) can receive direct messages. Cold contacts, with more than six months since the last interaction, tend to be cheaper via Click to WhatsApp, taking advantage of the 72-hour free window.

3. Negotiate volume with Meta. According to the report, Meta is open to building commercial agreements around the volume of messages, with the possibility of progressive discounts for large-scale operations.

checklist_outubro = ['map category of each automated flow (marketing, utility, service)', 'measure average time to resolve customer problem', 'segment base by last interaction', 'evaluate Click to WhatsApp for cold contacts', 'talk to Meta’s commercial team about volume']

The role of AI in the new scenario

The report cites performance data that reinforce why automating part of the customer service can help control costs under the new billing: the use of AI reduces costs by four times compared to service provided solely by people.

Another cited data is about abandoned cart recovery: AI-driven flows achieve 25% recovery, compared to 20% in human service. As each response now sent by the brand can have a cost, optimizing the conversion rate per conversation becomes even more valuable.

What does this change mean in practice for online sellers

For stores and businesses that rely on WhatsApp as a sales and support channel, the change calls for a closer look at paid media: each response now has a cost, so the efficiency of the conversation is as important as the volume of contacts.

Teams that already use automation and AI for triage are likely to feel the impact less, because they can resolve more cases with fewer message exchanges. Operations that still depend on manual support, without a defined script, are likely to see the cost rise more quickly starting in October.

Summary of what to do before October

Map out current message flows and classify each into three categories. Measure the average response time and the number of exchanges until a support case is resolved. Evaluate if it makes sense to segment campaigns using Click to WhatsApp for cold contacts. And, if the volume of messages is significant, it may be worth opening a commercial discussion with Meta about discount terms before the billing starts to apply.