One WhatsApp message a month, 22% more revenue
A Thrissur bakery spent all its marketing on Instagram ads for new customers. Most customers bought once for a birthday and never came back.
They started a simple WhatsApp broadcast with consent: a birthday reminder a week before each customer’s family occasions, a monthly new-flavour post and a referral offer.
Within three months repeat orders made up 22% more revenue, with almost no ad spend.
Illustrative example based on a common pattern in Kerala e-commerce accounts. Numbers rounded.
What a retention campaign is
Retention works on timing: reorder reminders, renewals, occasions and post-purchase education.
Use customer lists with consent. Ads to customer lists on Meta and Google can support owned channels.
Repeat revenue = customers × repeat purchase rate × average order value
Retention checklist
Tick what you already do.
0 of 6 done (0%)
Big gaps. Start with the first unticked item; each one is a quick win.
Stuck on one? Join the community and post it for doubt-clearing.
Retention channels
| Channel | Use for |
|---|---|
| Reminders, offers, order updates (with consent) | |
| Newsletters, education, renewals | |
| Ads to customer lists | New launches, win-back |
| Referral programme | Turning customers into promoters |
How experienced marketers use Retention campaign
1. Consumables and food
Reorder reminders based on usage.
2. Courses and services
Upsell next-level courses, renewals and referrals.
3. Win-back
Offers to customers who haven’t bought in 90+ days.
What good looks like
| Business type | Starting rule | Why |
|---|---|---|
| Repeat purchase rate (e-commerce) | 20–40% in 12 months | Starting rule; varies by product. |
| WhatsApp broadcast frequency | 2–4 a month | More causes blocks and opt-outs. |
| Win-back trigger | 60–120 days inactive | Depends on reorder cycle. |
When the number lies
- Discount addiction
- Heavy discounts lift repeat sales but cut margin. Check contribution, not just orders.
- They’d have bought anyway
- Test with a holdout group to see the real lift.
Mistakes to avoid
Messaging without consent
Blocks, complaints and DPDP Act risk.
Only discounts
Customers wait for offers.
No tracking of repeat rate
You can’t tell if retention works.
Related terms
Questions people ask about a retention campaign
What is a retention campaign?
Marketing aimed at existing customers to bring them back for repeat purchases or renewals.
What channels work best for retention?
WhatsApp, email and SMS with consent, plus ads to customer lists.
How does retention help ad performance?
Higher lifetime value means you can afford a higher CAC, so you can bid more for new customers.
How often should I message customers?
Usually 2–4 useful messages a month on WhatsApp; respect opt-outs.
Put it into practice
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