Understanding WhatsApp’s 24-hour window
The 24-hour window is a rule of the WhatsApp Official API defined by Meta to control when a business can chat freely with a customer and when it’s necessary to use message templates (templates). Understanding this concept is essential to using the platform correctly and avoiding errors when sending messages.What is the 24-hour window?
The 24-hour window is a period that begins whenever the customer sends a message to the business. During this period, your business can respond freely using regular messages, such as text, images, documents, audio, video, lists, and buttons. Each new message sent by the customer resets this 24-hour counter.Example
When the window is open
While the window is open, you can send almost any type of message. Allowed messages:- Text
- Images
- Videos
- Audio
- Documents
- Stickers (when supported)
- Location
- Contacts
- Interactive buttons
- Lists
- Automated replies
- Messages sent by AI agents
- Messages sent by human agents
During this period you don’t need to use templates to respond to the customer.
When the window expires
After 24 hours with no new message from the customer, the conversation is closed. From that point on:- You can’t send regular messages
- Any attempt will be rejected by the WhatsApp API
Frequently asked questions
Can I send regular messages after 24 hours?
Can I send regular messages after 24 hours?
No. Once the window expires, only an approved template can be sent.
The customer replied to the template. Can I chat normally now?
The customer replied to the template. Can I chat normally now?
Yes. As soon as the customer replies, a new 24-hour window opens.
Does every customer message reset the window?
Does every customer message reset the window?
Yes. Whenever the customer sends a new message, the window is renewed for another 24 hours.
Can I send media during the window?
Can I send media during the window?
Yes. Images, videos, documents, audio, and other supported formats can be sent normally while the window is open.
Do I need to create a template for every conversation?
Do I need to create a template for every conversation?
No. Templates are only needed to start or resume a conversation when there is no open 24-hour window.
Summary
Best practices
- Reply to the customer while the 24-hour window is open to keep the conversation flowing
- Use templates only when you need to start or resume support
- Choose the correct template category (Marketing, Utility, or Authentication) to avoid approval rejections
- Monitor when the window is about to expire to automate sending templates when needed