Can I extend the 24-hour window?

No. The window is controlled by Meta and resets only when the customer sends a new message.

WhatsApp 24-Hour Window

Q: What happens after 24 hours?

You can no longer send free-form messages. You can only send pre-approved templates in the marketing, utility, or authentication categories (if the customer has opted in).

What the 24-hour customer service window is, when it starts, and how it affects what you can send.

Last reviewed: September 2, 2026•Reviewed by: Convoup Platform & Technical Operations

The WhatsApp 24-hour window is the period after a customer's last message during which you can send free-form replies — after which only pre-approved message templates can be used.

Why This Matters

The Problem

Many businesses do not understand the 24-hour rule and attempt to send free-form messages hours or days after a customer's last message. Meta blocks these messages, and repeated violations can restrict your account.

Deep Dive

What WhatsApp 24-Hour Window Actually Is

When a customer sends you a message, a 24-hour "service conversation" window opens. During these 24 hours, you can reply with any free-form message — text, images, documents, location. After the window closes, you can only send messages using pre-approved templates in the marketing, utility, or authentication categories. The window resets every time the customer sends a new message. This is not a Convoup rule — it is a Meta rule enforced at the API level.

In Practice

Real-World Examples

Customer messages at 2:00 PM on Monday — you can send free-form replies until 2:00 PM on Tuesday. After that, only templates.

Customer messages again at 10:00 AM on Tuesday — the window resets, giving you until 10:00 AM on Wednesday.

Watch Out

Common Mistakes

Not responding within 24 hours — after the window closes, you lose the ability to send free-form messages.

Assuming the window resets when YOU reply — it only resets when the CUSTOMER sends a new message.

Sending marketing templates to contacts who have not opted in for marketing — templates require opt-in.

From Our Experience

Expert Note

Convoup shows the remaining window time per conversation, so agents know whether they can send a free-form reply or need to use a template. This prevents failed message attempts.

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Frequently Asked Questions about WhatsApp 24-Hour Window

Keep Learning

Related Guides

WhatsApp Message Templates

What WhatsApp message templates are, how the approval process works, and how to create templates that get approved.

WhatsApp Opt-In

What WhatsApp opt-in means, how to collect it, and why it is non-negotiable for business messaging.

WhatsApp API Pricing

How WhatsApp conversation charges work, what the different categories are, and how to estimate your costs.

Convoup is built on the official WhatsApp Business Platform (Cloud API). Convoup is not endorsed by, affiliated with, or an official partner of Meta. WhatsApp is a trademark of its respective owner. Meta conversation charges apply separately from Convoup's subscription.

Built on WhatsApp Business Platform