Click-to-WhatsApp ads and the 72-hour free window
This is the only place in the WhatsApp Business Platform where marketing templates are free. Not discounted — free. Most UAE advertisers running these ads never structure anything around that, and never capture the one field that makes the spend measurable.
Short answer. A conversation started from a click-to-WhatsApp ad opens a free entry point
window of 72 hours. Inside it, every message type is free — marketing, utility,
authentication and free-form alike. Meta's pricing documentation puts it plainly: "you can send any type of message
to the user at no charge." And capture ctwa_clid on the first inbound message, or the spend is
unattributable.
The two windows are not the same thing
Almost every article conflates these. They behave differently and the difference is money.
| 24h customer service window | 72h free entry point window | |
|---|---|---|
| Opened by | Any inbound message | CTWA ad or Facebook Page CTA button |
| Length | 24 hours | 72 hours |
| Free-form messages | Free | Free |
| Template messages | Billed | Free |
| Marketing templates | ~AED 0.183 | Free |
So an ordinary inbound lead gives you free replies. An ad lead gives you three days in which even your marketing templates cost nothing. That is a materially different flow, and almost nobody designs for it.
One trigger condition people miss: the free entry point window is opened by the user's message, and the business needs to respond within 24 hours. Reply on day two and you have already lost the window you paid Meta for the click to create. This is the single strongest argument for an automated first reply on CTWA campaigns.
What this changes about campaign design
Once messages inside the window are free, the constraint moves from cost to attention. Practical consequences:
- Reply in seconds, automatically. Not for politeness — because the 24-hour response condition is what secures the 72-hour window.
- Ask more qualifying questions than you would elsewhere. On a phone lead each outbound template is billable; here it is not. Use that. See qualifying leads before the call.
- Send the catalogue, the price list, the brochure. Media-heavy messages that you would ration elsewhere are free here.
- Build a three-day follow-up sequence, not a one-shot reply. Day 0, day 1, day 2 — all free, all inside the window. Day 4 is billable, so decide before then whether this lead is worth a paid template.
- Do not confuse free with welcome. Free messages still generate blocks and reports, and blocks degrade the quality rating on your number.
ctwa_clid: the field that fixes attribution
CTWA has an attribution problem that ordinary paid media does not: there is no website in the path, so there is no pixel, no landing page, no UTM. The click goes straight into a chat. Businesses routinely run these ads for months and cannot say which ad produced which sale.
The fix is in the webhook. When someone arrives from a CTWA ad, the inbound message payload carries a
referral object:
| Field | What it gives you |
|---|---|
source_id | The ad the click came from |
source_type | Ad or post |
source_url | The ad's URL |
headline / body | Snapshot of the creative text they saw |
media_type / image_url | The creative asset |
ctwa_clid | The click identifier Meta needs back |
Then, when the lead converts — a sale, a booking, a qualified call — send the event to Meta's
Conversions API with action_source: "business_messaging" and
messaging_channel: "whatsapp", carrying that ctwa_clid. Meta ties the conversion back to the
click, and can then optimise delivery toward people who actually buy rather than people who merely message.
Two failure modes, both common. First: the referral object is only on the
first inbound message. Parse it there and stamp it on the contact record, or it is gone. Second: feeding
Meta only "conversation started" as the conversion. That optimises for cheap chatters. Feed it the event that means
money.
The creative decides the lead quality
Because the click is free to follow up, the temptation is volume. Resist it — a CTWA campaign optimised for cheap conversations produces a very large number of very bad leads, and your team drowns.
- Qualify in the creative. Naming a price, an area, or a minimum removes people you cannot serve before they cost you an agent's attention.
- Use the pre-filled message field. The ad can seed the first message. "I want a quote for a 2-bed in JVC" routes and qualifies itself; "Hi" does neither.
- Match language to audience set. Run Arabic and English creatives as separate ad sets rather than one bilingual creative, then route on it — see routing leads to the right salesperson.
- Do not run these to a number nobody watches. The cost of a CTWA lead is the click plus the wasted window.
Where CTWA beats the alternatives in the UAE
Compared with sending paid traffic to a landing page: no form to fill, no bounce, and the customer arrives in a channel they check. Compared with portal leads: the customer initiates, so the first message is free and consent is unambiguous. Compared with a cold broadcast: no frequency cap in the way, because the free entry point window is not subject to the marketing cap the way a cold marketing template is.
What it does not do is fix a weak offer. The window makes conversation cheap. It does not make people want the thing.
Pricing context, and one thing we could not verify
WhatsApp has billed per message since 1 July 2025; the older conversation-based pricing is deprecated. Marketing runs ~AED 0.183 and utility ~AED 0.058 in the UAE — see the pricing breakdown.
An open question, stated honestly. Several messaging providers are publishing that from 1 October 2026 Meta will begin charging for service messages — the free-form replies inside the 24-hour window — and that utility templates will lose their in-window free status, while the 72-hour free entry point window stays free. We checked Meta's own developer pricing documentation on 23 August 2026 and found no such notice: it still states that non-template messages are free and that utility templates delivered inside an open customer service window are free. We are not going to repeat an unverified change as fact. If it lands, the effect is that the CTWA free window becomes more valuable relative to everything else, not less. Check Meta's current pricing page before you budget.
Adjoltz builds these flows for UAE brands on Meta's official Cloud API — correct template categories, the buttons, and the inbox behind them. Messages at Meta's rate with zero markup, from $149/month.
Frequently asked questions
How long is the free window from a click-to-WhatsApp ad?
Seventy-two hours. A conversation started from a click-to-WhatsApp ad or a Facebook Page call-to-action button opens a free entry point window in which every message type is free, including marketing templates. Meta's pricing documentation states you can send any type of message to the user at no charge inside it.
Are template messages free inside the click-to-WhatsApp window?
Yes, and this is what distinguishes it from the ordinary 24-hour customer service window. In the normal service window only non-template messages are free and templates are still billed. In the 72-hour free entry point window every category is free, including marketing.
What is ctwa_clid and why does it matter?
It is the click identifier Meta includes in the referral object on the first inbound message from a click-to-WhatsApp ad, alongside source_id, source_type, source_url, headline, body, media_type and image_url. Capture it on that first message and send conversions back through Meta's Conversions API with action_source set to business_messaging and messaging_channel set to whatsapp. Without it there is no pixel and no landing page in the path, so the spend cannot be attributed.
Do I have to reply within a certain time for the free window to apply?
Yes. The free entry point window is opened by the user's message and the business needs to respond within 24 hours. Replying on day two means losing the window you paid Meta for the click to create, which is the strongest argument for an automated first reply on these campaigns.