A WhatsApp free entry point conversation is a 72-hour window Meta grants for free whenever a customer reaches your business through a Click-to-WhatsApp (CTWA) ad or a Facebook Page call-to-action button. Inside that window every message — business-initiated and user-initiated — is billed at ₹0, so ad-sourced chats that would normally cost ₹0.11–₹0.99 per marketing/utility conversation become completely free.
For any Indian business running paid WhatsApp acquisition, this is the single largest conversation-cost lever available in 2026. Most brands leave it on the table because they treat CTWA purely as a lead source and never architect their follow-up around the free 72 hours. This guide explains exactly how the free entry point works, what disqualifies it, and how to design campaigns so the maximum share of your conversations land in the ₹0 bucket.
What counts as a free entry point conversation
Meta opens a free entry point conversation only when the chat is originated from a recognised free entry point. As of 2026 the qualifying sources are:
- Click-to-WhatsApp ads — ads on Facebook or Instagram with a "Send message" / WhatsApp destination.
- Facebook Page CTA button — the "Send Message" button on a Page that routes to WhatsApp.
When a user taps one of those and sends the first message, Meta stamps the conversation as referral.source_type = "ad" (or "post") in the inbound webhook and opens a 72-hour free window — longer than the standard 24-hour service window. Within those 72 hours you can send unlimited free-form messages and templates without a per-conversation charge.
Key distinction: a normal customer-initiated service conversation gives you a 24-hour window that is free to reply in but is still counted for the service-conversation tally. A free entry point conversation gives you 72 hours and is genuinely uncharged even for marketing/utility template sends inside it — that is the part brands miss.
Why this is the biggest cost lever in paid WhatsApp acquisition
Consider a D2C brand spending ₹2,00,000/month on CTWA ads at a ₹35 cost-per-lead, producing ~5,700 conversations. Under standard conversation-based pricing, following up each lead with a marketing template plus a utility reminder would add roughly ₹0.78 + ₹0.11 per conversation — about ₹5,000/month in conversation fees on top of ad spend. Architected into the free entry point window, that follow-up cost drops toward ₹0.
The saving scales linearly with ad spend, which is why we cover it alongside broader 24-hour window cost optimization tactics — but the free entry point is the higher-leverage half because the window is longer and the marketing sends inside it are free, not merely the replies.
How to architect campaigns for the free window
1. Detect the referral flag on inbound
Your webhook handler must read the referral object on the first inbound message and tag the contact as ad-sourced with a 72-hour expiry timestamp. If you route ad leads through the same generic flow as organic chats, you will send templates after the window closes and pay full price. Tag on arrival, branch on the tag.
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2. Front-load the qualifying and nurture sequence
Because the window is free, do your qualification, catalog share, objection handling, and first re-engagement inside the 72 hours rather than dripping them over a week. A well-designed sequence gets the lead to a decision before the free window expires — turning what would be 4–5 paid conversations into one free one.
3. Use templates freely — they're free here
Outside a free entry point window, a marketing template opens a paid marketing conversation. Inside it, the same template is free. So the free window is the right place to send your best offer template, not to hoard it. This inverts the usual "ration your marketing templates" instinct.
4. Measure free vs paid conversation mix
Track the percentage of your total conversations that came in free via the referral flag. If you are spending on CTWA but under 30% of conversations are free-entry-point, your follow-up is leaking past the window. This mirrors the discipline in our Click-to-WhatsApp ads ROI playbook, where cost-per-outcome — not cost-per-click — is the number that matters.
What disqualifies or ends the free window
- Organic first-touch. If the customer messages you from a saved contact, a QR code, or wa.me link — not an ad or Page button — it is a standard conversation, not free entry point.
- Window expiry. After 72 hours the conversation closes; the next business-initiated message opens a normal paid conversation.
- New ad click = new free window. If the same user clicks another CTWA ad later, that re-opens a fresh 72-hour free window — a reason to retarget engaged leads with ads rather than paid templates.
- Policy category still applies. Free does not mean rule-free: marketing templates inside the window still need approval and still count toward quality signals.
Free entry point vs the other conversation categories
| Category | Window | Who pays | Triggered by |
|---|---|---|---|
| Free entry point | 72 hours | Nobody (₹0) | CTWA ad / Page CTA |
| Service | 24 hours | Free to reply, counted | Any customer message |
| Marketing | 24 hours | Business (highest rate) | Business-initiated promo |
| Utility | 24 hours | Business (low rate) | Business-initiated txn update |
For the full per-category rate card and how these roll up into your monthly bill, see WhatsApp Business API cost in India.
Putting it together: a free-first funnel
The highest-margin WhatsApp funnel in 2026 looks like this: run CTWA ads to open free entry point conversations, tag ad-sourced leads on inbound, run your entire qualify-nurture-offer sequence inside the free 72 hours, and retarget non-converters with a fresh ad click rather than a paid template. Pair it with a strong CTWA lead magnet so the ad click rate — and therefore the volume of free windows you open — stays high.
Done well, a large share of your conversation volume costs nothing beyond the ad spend you were already paying, and your effective cost-per-qualified-lead drops well below competitors who pay conversation fees on top of ads.