The verdict in three sentences
Between 20 and 30 % of mobile-money attempts fail — usually insufficient balance or a timeout, not an outright decline. Yet 40-55 % of those failures are recoverable within 24 h if you retry at the right moment on the right channel. A well-tuned dunning sequence lifts revenue 5-12 % with zero extra ad spend.
Why payments fail (and why they recover)
| Failure cause | Estimated share | Recoverable? | Best retry window |
|---|---|---|---|
| Insufficient balance | ~35-45 % | Yes (after top-up) | T+2h to T+24h |
| Timeout / network | ~20-30 % | Yes (instant retry) | T+15min |
| Wrong PIN | ~10-15 % | Yes | T+15min |
| Voluntary cancel | ~10-15 % | Sometimes | T+2h |
| Cap reached | ~5-10 % | Yes (split) | T+24h |
The key: separate technical failures from balance failures. A timeout retries immediately; an insufficient balance retries when the customer has likely topped up (often evening or next day).
The dunning cadence that works
| Step | Delay | Channel | Message |
|---|---|---|---|
| 1 | T+15 min | Auto retry + WhatsApp | "Your payment didn't go through, retry here" |
| 2 | T+2 h | Reminder + direct payment link | |
| 3 | T+24 h | WhatsApp + SMS | Final nudge + optional small promo |
| 4 | T+72 h | SMS | Soft close, reactivation possible |
Channel choice is decisive. WhatsApp shows roughly 80 % open rate versus ~30 % for plain SMS. Keep SMS as a safety net when the number has no WhatsApp.
Channel comparison
| Channel | Open rate | Cost / message | Best for |
|---|---|---|---|
| ~80 % | Low (API) | Retries 1 to 3 | |
| SMS | ~30 % | Medium | Safety net |
| ~15-25 % | Very low | B2B complement | |
| Manual call | ~60 % | High (time) | High baskets |
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Mini case study
Awa runs a shop in Dakar: 400 attempted orders/month, average basket KES/FCFA equivalent 20,000 FCFA. At a 25 % failure rate she loses 100 attempts, i.e. 2,000,000 FCFA stuck. Turning on the T+15min / T+2h / T+24h WhatsApp sequence recovers ~48 % of failures — 48 orders, or 960,000 FCFA back per month. Retry cost: near zero via the WhatsApp API.
FAQ
How many retries before fatiguing the customer? Three useful retries suffice (T+15min, T+2h, T+24h). Beyond that, returns drop and you risk annoyance. Add a soft close at T+72h.
Is WhatsApp really better than SMS? Yes: ~80 % open versus ~30 % for SMS. WhatsApp also allows a clickable link and a conversation thread, making payment resumption easier.
Should I offer a promo on the first retry? No: reserve any discount for the third retry. Many failures are technical and resolve without touching margin.
Can all of this be automated? Yes: the failure webhook triggers the sequence, with an instant auto-retry for timeouts. Automation is what makes dunning profitable at scale.
What realistic revenue gain? Expect 5-12 % additional revenue depending on your baseline failure rate and sequence quality. The gain is net because there is no acquisition cost.
Let's talk about your project. We set up automated mobile-money dunning (WhatsApp + retry) to recover your failed payments. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
