The verdict in three sentences
A company running a 95-day DSO is in practice financing its customers with an overdraft or credit line charged at 9 to 12% a year. Automated reminders by email, SMS and WhatsApp, plugged into your invoicing software, cost FCFA 2.5 to 6 million (about EUR 3,800 to 9,150) and commonly bring collection time down towards 60 days within two to three quarters. The main gain is not the accountant's time but the cash released, which runs into tens of millions of FCFA from FCFA 1 billion of revenue upwards.
The figures below come from a West African benchmark in Abidjan, with EUR equivalents. A Toronto finance team will pay in CAD, but the ratios (days gained, share of cash released, payback) transpose directly.
Why manual reminders fail
In most service SMEs, collections rely on one person, a spreadsheet and memory. Invoices under FCFA 2 million are only chased after 45 days, large accounts wait for a purchase order nobody reconciled, and no one knows who promised to pay when.
| Symptom | Typical manual setup | Automated setup |
|---|---|---|
| First reminder | 30 to 45 days after due date | 5 days before due date, then day +3 |
| Invoices chased each month | 40 to 60% | 100% |
| Channels | Email and phone | Email, SMS, WhatsApp, targeted calls |
| Payment promise tracking | Notebook or spreadsheet | Date logged, automatic follow-up if missed |
| Accounting time spent | 3 to 4 days a month | 1 day a month |
| CFO visibility | Monthly aged balance | Daily dashboard |
The reminder sequence that works
Tone and channel matter as much as frequency. In Côte d'Ivoire WhatsApp read rates exceed 90%, while a reminder email is often opened by fewer than 40% of recipients. The sequence must escalate and switch channels.
| Step | Timing | Channel | Content | Indicative 2026 unit cost |
|---|---|---|---|---|
| Courtesy reminder | Day -5 | PDF invoice, Wave payment link or bank details | Negligible | |
| First reminder | Day +3 | Email and WhatsApp | Amount and due date | FCFA 5 to 15 per WhatsApp message |
| Second reminder | Day +10 | SMS and WhatsApp | Request for a payment date | FCFA 15 to 25 per SMS |
| Internal escalation | Day +20 | Alert to account manager | Call from the account owner | Sales time |
| Formal reminder | Day +30 | Email copied to customer CFO | Signed letter, statement of account | Negligible |
| Formal notice | Day +45 | Letter and email | Contractual late-payment penalties | FCFA 15,000 to 30,000 bailiff fee if needed |
| Collections | Day +60 | File handed over | Agency or OHADA payment order procedure | 5 to 15% of amount recovered |
The system pauses the sequence automatically as soon as a part payment, dispute or payment promise is logged, so good-faith customers are never harassed.
Cost of the options in 2026
| Option | Upfront cost | Recurring cost | Best for |
|---|---|---|---|
| Spreadsheet and manual chasing | FCFA 0 | 3 to 4 accounting days a month | Under 30 invoices a month |
| ERP dunning module (Sage, Odoo) | FCFA 300,000 to 1,000,000 setup | Existing licence | Email only, little WhatsApp |
| Subscription collections software | FCFA 0 to 500,000 | FCFA 150,000 to 400,000 a month | SMEs fine with a standard euro-priced tool |
| Custom automation | FCFA 2.5 to 6 million | FCFA 50,000 to 150,000 a month (hosting, messages) | Multi-channel, ERP integration, CFO dashboard |
Mini case study
Aïcha, CFO of a 45-person IT services firm in Abidjan, manages FCFA 1.2 billion of annual revenue and FCFA 180 million of overdue receivables. Her DSO is 95 days and her credit line costs 10.5% a year.
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- Cash released moving from 95 to 60 days: 1,200,000,000 × 35 / 365 = about FCFA 115 million (EUR 175,000)
- Financing costs avoided: 115,000,000 × 10.5% = about FCFA 12 million a year
- Accounting time recovered: 2.5 days a month, about FCFA 1.3 million a year
- Investment: FCFA 4 million plus FCFA 100,000 a month, i.e. FCFA 5.2 million in year one
- Payback: about 5 months
These figures are a 2026 order of magnitude: the actual DSO drop depends on the share of public-sector customers, who often pay beyond 90 days whatever the reminders.
FAQ
Can we chase payments on WhatsApp without sounding aggressive?
Yes, provided you use the WhatsApp Business API with approved templates signed in the company's name and send during business hours. Companies using it typically see 20 to 30% more payments within 7 days of the reminder.
What DSO should a service SME target?
A DSO of 45 to 60 days is realistic with private customers. With 40% public or semi-public customers, 70 to 80 days is a more honest target.
Does the automation work with Sage or Odoo?
Yes, the system reads invoices and payments through the API or an hourly scheduled export. The connection usually accounts for 20 to 30% of the project budget.
How long does implementation take?
Allow 5 to 8 weeks: designing the sequence, integrating with accounting, getting WhatsApp templates approved by Meta, then a one-month pilot on one customer segment.
Can we add a Wave or Orange Money payment link to the reminder?
Yes, each message can include a payment link for small invoices, which speeds up collection of amounts under FCFA 2 million, often 70% of invoice count.
Let's scope your project. Share your aged balance and invoicing tool: we define the reminder sequence, integration scope, indicative budget and go-live timeline. Detailed quote within 48 h. 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.