WhatsApp Business 24-hour rule, explained for sales teams

October 02, 2026

On the WhatsApp Business Platform (the API), you can reply to a customer in your own words for 24 hours after their last message. After that, you can only send a message template that Meta has approved. The ordinary WhatsApp Business app does not have this rule.

Everything below was checked against Meta’s own pages on 2 October 2026.

The rule in one paragraph

WhatsApp’s Business messaging policy (last updated 23 September 2026) says you may reply to a customer without a template inside the 24-hour customer service window, which “opens and resets with each user message”. Outside the window, you may only send approved message templates. You may only start a conversation with an approved template. The policy also requires the person’s opt-in before you contact them.

When the clock starts and resets

Meta’s guide to sending messages says the 24-hour timer starts when a WhatsApp user messages you or calls you. It starts again each time they message or call before it runs out.

Only the customer moves the clock. Meta’s page lists two things that reset it: a message or a call from the customer. Your own replies and templates are not on that list. If the customer answers a template, a new window opens.

Say a lead at Delta Freight asks for a quotation at 21:40 on Monday:

Time	What happens	Window closes at
Monday 21:40	The lead messages you	Tuesday 21:40
Monday 21:41	Your automatic first reply goes out	Tuesday 21:40 (no change)
Tuesday 09:15	Sam sends the quotation	Tuesday 21:40 (no change)
Tuesday 14:30	The lead asks about delivery dates	Wednesday 14:30
Wednesday 14:30	Nothing more from the lead	Closed. Templates only

What you can send inside the window

Inside the window you can send ordinary messages: text, images and the other non-template types in Meta’s documentation. Nothing needs approval. Write the way you would to any customer.

Automation is allowed. The policy says you may use it during the 24-hour window, provided the customer has a prompt, clear and direct way to reach a person. It lists a hand-off to a human agent in the chat, a phone number, an email address, web support, an in-store visit or a support form.

Meta’s pages currently disagree on whether these replies are charged from 1 October 2026. The section on what changed sets out what each page says.

After it closes: templates and categories

Once the window closes, a free-form message will not go out. You need two things.

Opt-in. Meta’s opt-in requirements say you must have it before sending messages outside the 24-hour window. The customer must be told clearly that they are agreeing to receive WhatsApp messages, and from which business. You can collect it on your website, by SMS, in person, on paper, through an automated phone menu or in the WhatsApp chat itself.
An approved template. You write it, choose a category and submit it to Meta for review.

Meta’s template category guidelines set out three categories:

Category	What Meta says it is for	Sales example
Marketing	Generating awareness, driving sales, retargeting customers	A nudge on an open quotation, an offer, a “still interested” message
Utility	Following up on a user’s action or request. Must be non-promotional and specific to their order, account, services or transactions	A booking confirmation, a payment reminder
Authentication	Verifying a user’s identity	A one-time passcode

A sales follow-up is a marketing template. Meta’s test for utility is that the message has no promotional or persuasive intent, and a follow-up on a quote exists to persuade. Templates that mix utility and marketing content are treated as marketing, and Meta runs a recurring review that moves miscategorised templates.

A template that only delivers something the customer asked for, such as their meeting confirmation, may qualify as utility. That is our reading of the guidelines, and Meta makes the final call.

Here is an example of a follow-up template. The {{1}} is the customer’s first name.

Hi {{1}}, it’s Amaka from Kite Travel. You asked about group fares to Nairobi. Would you like me to keep your quote open? Reply YES and I’ll confirm what is still available.

When the customer replies, a new 24-hour window opens and you are back to normal conversation. For wording after a quote goes quiet, see our WhatsApp follow-up messages after a quotation.

One limit to plan for: Meta’s messaging limits say a newly created business account (Meta calls it a business portfolio) starts at 250 unique contacts in a moving 24 hours for messages sent outside the window.

If you want wording to adapt, 30 WhatsApp Sales Messages is a free set of templates among the free tools on the Socianet site.

The 72-hour exception for ad leads

Leads from Click to WhatsApp ads get a second, longer window. Meta’s pricing page calls it the free entry point window. It works like this:

A person taps your Click to WhatsApp ad, or the call-to-action button on your Facebook Page, and messages you. They must be on the Android or iOS app. Desktop and web do not count.
The normal 24-hour customer service window opens.
If you reply within 24 hours, that reply is free and a free entry point window opens, starting from the time you replied.
It stays open for 72 hours. Any message you send in that time, including templates, carries no Meta charge.

The 72 hours cover the cost only. The same page says the two windows are independent, so once the customer service window closes you can send templates only.

Say a lead taps a Nile Motors ad and messages at 10:00 on Monday. Tolu replies at 10:04. Free-form replies are allowed until 10:00 on Tuesday, or later if the lead writes again. The free window runs until 10:04 on Thursday. If the lead goes quiet and has opted in, Tolu can send an approved marketing template on Wednesday at no Meta charge.

That gives an ad lead three days of free follow-up, if your templates are approved before the campaign starts. Our guide to following up Click to WhatsApp ad leads has the full sequence.

What changed in 2025 and 2026

The window itself has not changed. It is still 24 hours. What changed is what Meta charges.

Date	Change
1 November 2024	Service conversations (replies inside the window) became free for all businesses
1 July 2025	Meta moved from charging per conversation to charging per message. Non-template messages stayed free
1 October 2026	One Meta page says non-template replies inside the window are now charged per message, along with utility messages sent in reply inside it. Another Meta page still says both are free

The first two rows come from Meta’s main pricing page. The charges in the third row come from its page on pricing for non-template messages. That page gives 1 October 2026 as the date the charges take effect. It says the rate in each market matches the rate for utility and authentication messages, with no volume tiers, and that the 72-hour free entry point window stays free for message delivery.

Meta’s pages do not all agree yet. On 2 October 2026 the main pricing page still said “All non-template messages are free” and listed utility templates inside the window as free. The WhatsApp Business pricing page still described service messages as not charged. Budget for the charge until your WhatsApp provider confirms otherwise, ask for its rate card and check your first October invoice.

We have not printed rates. They vary by market, and the current rate cards are on Meta’s pricing page.

Does the WhatsApp Business app have this rule?

No. The policy puts the 24-hour window and message templates under a section headed “WhatsApp Business Platform Specific Terms”. The app has no templates. You can message a contact on Thursday who last wrote to you on Monday.

The opt-in rule sits in a different section and covers both products. On the app too, you may only message people who gave you their number and agreed to hear from you.

A team that outgrows the app usually meets the 24-hour rule on the day it moves to a shared inbox. Our guide to one WhatsApp number for multiple agents compares the options.

How sales teams avoid missing the window

Reply while the lead is still in the chat. A conversation that keeps moving keeps its window. Our source-checked lead response time statistics cover what the research says about speed.
End with a question that invites a reply. Every customer message gives you a fresh 24 hours.
Set a reminder at hour 20. Four hours is enough for one last free-form message.
Ask for opt-in while the chat is warm. Do it in the first conversation.
Get templates approved before you need them. One for a quiet quote, one for a missed meeting, one to close the enquiry politely.
Keep a second channel. Ask for an email address or permission to call.

A question that invites a reply:

I’ve attached the quotation for Baobab Foods. Would delivery in the week of 16 November suit you, or is a later week better?

An hour-20 message:

Hi, a quick check before I close for the day. Is there anything in the quote you would like me to change?

An opt-in request that names the business and the channel:

May Harbor Clinic send you appointment updates and occasional offers on WhatsApp? Reply YES to agree. You can reply STOP at any time.

For how often to follow up once the window has closed, see how many follow-ups before giving up.

Frequently asked questions

What happens when the 24-hour window closes?

You can no longer send free-form messages to that customer through the API. You can send an approved template if you have their opt-in. The customer can message you at any time, and that opens a new window.

Do I need a template to message a customer after 24 hours?

On the WhatsApp Business Platform, yes. The policy allows only approved message templates outside the window. On the WhatsApp Business app, no.

How long does template approval take?

Meta’s templates overview says review can take up to 24 hours. Submit templates a few days before you need them. A rejected template can be edited and sent for review again.

Can follow-ups be automated?

Yes. Inside the window, the policy allows automated replies if the customer can reach a person. After the window, your software can send an approved template on a schedule to contacts who have opted in.

Does a customer’s reply reset the window?

Yes. The policy says the window “opens and resets with each user message”. It names no other way to reset it, so your own replies do not.

Check your follow-up before the next lead goes quiet

Socianet puts every WhatsApp chat, lead and follow-up in one pipeline the whole team can see, with reminders and follow-up sequences built in. New leads get an automatic first reply in about 5 seconds.

Book the free 30-minute pipeline audit and bring one lead that went quiet. Ask where the window closed and what would have kept it open. The advice is yours to keep, whether or not you use Socianet.

Book a free pipeline audit

Sources

Patrick Nwafor

Patrick Nwafor is Chief Marketing Officer at Socianet, the CRM for growing sales teams. He has worked on lead generation, event registration and digital campaigns since 2016, for organisations including Africa’s Young Entrepreneurs, Dr Clear Aligners UK and the Inshort Film Festival.

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