The verdict in three sentences
For an SME issuing 300 to 1,500 invoices a month, automating invoicing and dunning costs EUR 2,000 to 8,000 for connectors (Exact Online, Twinfield, Pennylane, Sage) and EUR 50 to 300 a month for a dunning tool. The gain shows mainly in DSO, cut by 12 to 20 days, and in 1 to 2 days of data entry saved per week in the finance team. With structured e-invoicing spreading across Europe (mandatory B2G in the Netherlands, France phasing in B2B from September 2026, EU ViDA rules for cross-border invoices by 2030), this project is unavoidable for Amsterdam SMEs trading with European clients: better to turn it into a cash gain.
What gets automated and what it costs
The project splits into independent blocks. Many SMEs start with dunning, the fastest lever on cash, then connect invoicing to the CRM or ERP.
| Block | Common 2026 tools | Setup cost (EUR, excl. VAT) | Monthly subscription | Main gain |
|---|---|---|---|---|
| Automatic invoice generation | Exact Online, Pennylane, Sage, Odoo | 1,000 to 3,000 | EUR 50 to 250 | No more double entry |
| CRM or ERP to accounting connector | API, Make, n8n, custom build | 2,000 to 8,000 | EUR 20 to 100 | Invoices sent same day |
| Multichannel dunning | Upflow, Chaser, Agicap, Payt | 500 to 1,500 | EUR 50 to 300 | DSO cut by 12 to 20 days |
| Online payment on invoice | iDEAL, GoCardless, Stripe | 300 to 1,000 | 1 to 1.5% per payment | One-click payment |
| Automatic bank reconciliation | Exact Online, Qonto, Agicap | 500 to 1,500 | included or EUR 30 to 80 | Matching without entry |
| E-invoicing network access | Peppol access point | 500 to 2,000 | EUR 30 to 200 | Compliance with EU clients |
For an SME of 20 to 80 staff, the overall budget usually lands between EUR 5,000 and 12,000 in year one, subscriptions included.
Measurable gains: before and after automation
The figures below are 2026 orders of magnitude seen at services and trading SMEs issuing about 800 invoices a month.
| Metric | Manual process | After automation | Change |
|---|---|---|---|
| DSO (days sales outstanding) | 58 days | 40 to 46 days | 12 to 18 days gained |
| Entry and sending time | 2 days per week | 0.5 day per week | 1.5 days saved |
| Invoices chased on time | 40 to 60% | 95 to 100% | No invoice forgotten |
| Invoicing errors | 2 to 4% | Under 0.5% | Fewer credit notes |
| Receivables over 90 days | 8 to 12% of balance | 3 to 5% | Lower bad debt risk |
| Delay from delivery to invoice | 5 to 10 days | Same day | Earlier payment |
E-invoicing: the timeline SMEs cannot ignore
European e-invoicing relies on structured formats (UBL, Peppol BIS, Factur-X). Automating dunning without addressing this means redoing the work a year later.
| Milestone | Obligation | Who is affected | Recommended action |
|---|---|---|---|
| In force | E-invoicing to Dutch central government | Suppliers to the state | Use a Peppol access point |
| 1 September 2026 | Receiving e-invoices in France | All companies in France | Make sure French clients can receive your UBL |
| 1 September 2027 | Issuing e-invoices in France | French SMEs | Expect structured invoices from French suppliers |
| By 2030 (EU ViDA) | Structured e-invoices for intra-EU B2B | Cross-border sellers | Configure UBL or Peppol output now |
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Sanne, CFO of a wine and spirits trading SME in Amsterdam (EUR 6 million revenue, 900 invoices a month), has a DSO of 60 days. She invests EUR 7,500 in a connector between her ERP and Exact Online, plus EUR 180 a month for a dunning tool. DSO falls to 44 days: 16 days gained on EUR 16,400 of daily revenue frees about EUR 262,000 of cash. At a 6% overdraft rate, that is nearly EUR 15,700 of interest avoided per year, plus 1.5 days of accountant time saved weekly, about EUR 14,000 a year. The project pays back in under four months.
FAQ
How much does dunning automation cost for an SME?
Budget EUR 500 to 1,500 for setup and EUR 50 to 300 a month depending on invoice volume. It is the fastest block to pay back, often in under two months.
Do we need to change accounting software?
Not necessarily. Exact Online, Twinfield, Sage and Pennylane expose APIs; a custom connector at EUR 2,000 to 8,000 links your ERP without migration.
Will automatic reminders hurt client relationships?
Not if they are progressive: a polite reminder 3 days before due date, a follow-up at day 7, a call at day 20. SMEs report fewer than 5% of complaints linked to reminders.
What are the payment terms rules in the Netherlands?
Dutch law sets 30 days by default for B2B and caps large companies paying SMEs at 30 days, with statutory interest due on late payments. Automated reminders make claiming that interest systematic.
How long until the system is live?
From 3 to 8 weeks depending on the number of connectors, with one month of parallel running recommended before switching off the old process.
Let's scope your project. Tell us your monthly invoice volume, accounting software and current DSO: we quote the automation between EUR 2,000 and 12,000, live in 3 to 8 weeks. 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.
