The 24-hour rule

You paid for the click, the lead opened the chat — and Meta started a timer. From the moment a contact last messages you, the business has 24 hours of free, free-form conversation. After that, the door closes: no more regular messages until the contact writes again, or you pay to knock with a pre-approved template.

This isn’t a Chatfuel limitation — it’s Meta’s anti-spam policy for the whole WhatsApp Business Platform. You can’t remove it, so every funnel that works is built around it.

How the window works

• A contact messages you (taps your ad, asks a question) → a 24-hour window opens.
• Every new message from the contact resets the clock — an active conversation can stay open for days.
• If the contact goes quiet for 24 hours, the window closes. You can no longer send free-form messages.
• If they write again later, a new window opens and the conversation continues — one lead can open many windows over a month.

The rule cuts one way: the contact can always message you; it’s only the business side that’s time-boxed.

Leads from ads get 72 hours

There’s one exception, and it’s the one that matters most for an agency: when the conversation starts from a click-to-WhatsApp ad, Meta opens a 72-hour window instead of 24. It works in two phases:

• Hours 0–24 — business as usual: free-form messages, no restrictions.
• Hours 24–72 — free-form messaging closes, but you can keep reaching the lead with approved templates — and inside this ad window, those templates are free.

In other words, every lead your ads generate comes with three full days of contact — the first day unrestricted, the next two via templates at no cost. That’s three days for the AI to qualify, follow up, and hand the lead over before re-engagement starts costing money.

Inside the window: everything is free

While the window is open, the AI can do all of its work — answer questions, handle objections, run the qualification flow — with no per-message cost and no format restrictions.

This is also where follow-ups live. A lead who stops replying mid-conversation isn’t cold, just quiet — and automatic follow-ups nudge them back into the chat while the window is still open. Free, timely, and no template needed. For an agency this is the single cheapest source of recovered leads: the click is already paid for; the follow-up costs nothing.

Outside the window: templates and Re-engage

Once the window closes, the only way to reach the contact is a WhatsApp template — a message pre-approved by Meta. Because the content is vetted upfront, Meta lets you send it any time:

Templates are the one paid message type: Meta bills per template sent, separately from the Chatfuel plan. Think of it as a re-targeting budget line, not a chat cost.

Choosing the right tool

What this means for your funnel

• The first 24 hours are the whole game. The lead is warm, messaging is free-form, and the window is guaranteed open — which is exactly why the bot qualifies immediately instead of “having someone reach out tomorrow.” Ad leads add two more days of free templates on top, but the warmest hours are still the first ones.
• Speed is money in both directions. A funnel that answers in seconds qualifies leads while they’re free to talk to; a client team that answers next morning starts every conversation with a paid template.
• Prepare templates before launch. Approval takes up to 24 hours — a campaign that needs re-engagement tomorrow needs templates submitted today.
• Budget for re-engagement, don’t fear it. A template sent to a warm-but-lapsed lead costs cents against an ad click that’s already paid for. Recovering even a fraction of closed-window leads usually beats buying new clicks.

Where to next