The verdict in three sentences
A recurring mobile-money charge fails 20 to 40 % of the time on the first attempt, almost always for insufficient balance, not because the customer wants to leave. A dunning sequence — retry at H+4, D+1, D+3 plus a WhatsApp nudge and a manual payment link — recovers the majority of those failures. Without it, every failure becomes a silent cancellation and your MRR leaks unnoticed.
Why mobile-money charges fail
Unlike a card, a mobile-money wallet has no overdraft: if the balance is 3,000 FCFA on the day of a 9,900 FCFA charge, the transaction fails outright. It is not a hard decline, it is a timing problem. The customer will be topped up within hours or days (salary, transfer). Dunning means retrying at the right moment and reminding them to top up.
| 2026 failure cause | Share of failures | Recoverable? | Best lever |
|---|---|---|---|
| Insufficient balance | 55 to 70 % | Yes, highly | Delayed retry + top-up reminder |
| Timeout / network | 10 to 20 % | Yes | Fast retry at H+4 |
| Mandate expired/revoked | 8 to 15 % | Partial | Re-authorization nudge |
| Wallet limit reached | 3 to 6 % | Yes | Next-day retry |
| Genuine intent to leave | 5 to 10 % | No | Pause offer |
Remember that 80 to 90 % of failures are NOT a churn decision. Treating them as such — cutting access on the first failure — destroys recoverable revenue.
The retry calendar that recovers the most
The winning sequence combines automatic retries and multichannel human nudges. Each attempt costs almost nothing (SMS, WhatsApp), comfortably covered by the MRR it saves.
| Step | Timing | Action | Cumulative recovery | Cost/nudge |
|---|---|---|---|---|
| 1 | H+4 | Silent auto-retry | 25 to 35 % | 0 FCFA |
| 2 | D+1 morning | Retry + "top up" SMS | 45 to 55 % | ~25 FCFA SMS |
| 3 | D+3 | Retry + WhatsApp + manual link | 60 to 72 % | ~15 FCFA WhatsApp |
| 4 | D+7 | Final reminder + pause offer | 68 to 78 % | ~25 FCFA |
| 5 | D+10 | Soft suspension (no deletion) | — | 0 FCFA |
Three to four attempts is the optimum: beyond that, the marginal gain is small and the risk of annoying good customers rises. Always space retries by hours to days to allow time for a top-up.
Mini case study
Grace runs a small salon-management SaaS in Nairobi: 100 subscribers at 9,900 FCFA-equivalent/month, i.e. 990,000 FCFA theoretical MRR. On the monthly charge, 30 fail on the first attempt (30 %). With no dunning she loses those 30: 297,000 FCFA of MRR gone every month. With the H+4 / D+1 / D+3 / D+7 sequence she recovers about 70 % of the failures, i.e. 21 subscribers saved: 207,900 FCFA of MRR preserved. The nudge cost (SMS + WhatsApp across 30 accounts, ~4 attempts) is around 3,000 to 4,000 FCFA/month. Return on investment above 50 to 1. Over a year, dunning prevents nearly 2,500,000 FCFA of lost MRR.
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FAQ
What share of mobile-money charges actually fails?
In 2026, expect 20 to 40 % first-attempt failures depending on population and amount, versus 5 to 10 % on card. The dominant cause, 55 to 70 % of cases, is insufficient balance — a timing issue, not intent.
How many charge attempts should I schedule?
Three to four, spread across H+4, D+1, D+3 and D+7. That is the optimum: the sequence recovers 60 to 78 % of failures, and adding attempts beyond that brings little while annoying solvent customers.
WhatsApp or SMS for the nudge?
Both, as an escalation. SMS at H+4/D+1 reaches everyone for about 25 FCFA. WhatsApp at D+3 lets you send a clickable manual payment link for ~15 FCFA, with a better click-through rate.
Should I cut access on the first failure?
No, that is the costliest mistake. 80 to 90 % of failures are not voluntary churn. Suspend softly only after D+10 and without deleting data, so reactivation is instant.
Can I get paid for referring a SaaS that handles dunning?
Yes. The Kolonell referral programme pays 12 % on an e-commerce/SaaS project and 5 % recurring. If you know a founder losing subscribers to failed charges, introduce them to us and you are commissioned.
Let's talk about your project. We set up the multichannel dunning sequence that turns your failed charges into recovered MRR. 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.
