Automated dunning workflow for SMEs: cost in Amsterdam (2026)

The verdict in three sentences

For a distribution SME in Amsterdam carrying EUR 2.7 million in receivables and a 75-day DSO, an automated dunning workflow costs EUR 8,000 to 25,000 and goes live in 4 to 10 weeks. The realistic goal is a DSO reduction of 15 to 25 days, which frees EUR 540,000 to 900,000 of cash. The decisive lever is not the tool but the combination of staged reminders, a channel customers actually read and a payment link right inside the message.

Why manual dunning fails

In many Dutch SMEs, dunning depends on an accounts receivable clerk who calls customers when time allows, often at month end. The result: invoices chased for the first time at D+40, customers claiming they never received the invoice, and no usable written trail if a dispute arises. Automation fixes all three by sending the right reminder at the right time, with the invoice attached and a timestamped history.

WhatsApp Business is increasingly accepted for B2B reminders in the Netherlands, with read rates commonly above 80% versus 20 to 35% for a dunning email. Business-initiated messages use Meta-approved templates and are billed per message, roughly EUR 0.03 to 0.08 for a utility message.

2026 budget: three possible architectures

The payment link is what turns a reminder into cash. A customer who can settle EUR 11,000 by iDEAL straight from the message often pays the same day, while a manual bank transfer waits for internal approval.

What to prepare before launch

Three prerequisites drive the outcome. First, clean customer data: the payables contact's mobile number, accounts email, contractual payment terms. Second, terms and conditions that state late payment interest and collection costs, otherwise the D+30 reminder carries no weight; in B2B the Dutch statutory commercial interest applies by default. Third, a clear priority rule: the 20% of customers who often hold 70 to 80% of receivables deserve human follow-up alongside the automation.

Mini case study

Sanne de Vries, CFO of a food distribution company in Amsterdam, manages EUR 2.7 million in receivables with a 75-day DSO, or about EUR 36,000 of sales per day. She picks a custom workflow at EUR 15,000, plus EUR 250 a month to run. If DSO drops by 20 days, the cash freed reaches EUR 720,000. With a credit line at 6% a year, interest savings are EUR 43,200 a year, plus 33 hours of AR time freed every month. The project pays for itself in about four months on interest savings alone, faster if avoided bad debt is counted.

FAQ

Will customers react badly to WhatsApp reminders?

Not if the tone is polite and the number is clearly identified as the company's. Early D+5 messages are reminders with the invoice and a payment link, and negative replies usually stay under 2% of recipients. Customers can opt for email only.

Do we need to change accounting software?

In most cases, no. The workflow reads overdue invoices from Exact, Twinfield, Odoo or even a daily export, for a connector cost of EUR 1,000 to 3,000.

How long until DSO improves?

First effects show within 30 to 45 days on new invoices. DSO settles at its new level after 4 to 6 months, once the old backlog is cleared.

What about receivables over 90 days?

They leave the automated sequence for legal handling: formal notice, then a collection agency typically charging 10 to 20% of amounts recovered, or court proceedings.

Is GDPR an issue for WhatsApp reminders?

B2B contact data used to collect a contractual debt has a legitimate basis, but you need a data processing agreement with the provider, documented retention periods and an easy opt-out to email.

Let's scope your project. Share your receivables, DSO and accounting software: we will design the right dunning sequence, an indicative budget between EUR 8,000 and 25,000 and a go-live date. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.