Accounts Receivable Dunning Automation in Amsterdam (2026)

The verdict in three sentences

A Dutch wholesaler whose days sales outstanding (DSO) reaches 92 days ties up well over a million euros of working capital, usually funded by a credit line at 6 to 8 %. Custom dunning automation (email, SMS and WhatsApp triggered by invoice age, iDEAL and card payment links, an outstanding-balance dashboard) costs 12 000 to 30 000 EUR from Dutch agencies in 2026, while Kolonell's simple application grid sits at 2 500 000 to 4 000 000 FCFA (3 810 to 6 100 EUR), delivered in 6 to 8 weeks. A realistic target is to cut 20 to 30 days of DSO within six months, provided sales management accepts firm reminder rules for every customer.

Why receivables drift to 92 days

In many Amsterdam SMEs, collections depend on one bookkeeper who calls customers when time allows, often after month-end close. Invoices under 1 000 EUR are almost never chased, and large accounts enjoy unwritten tolerance. The result is a DSO sliding from 60 to 90 days without anyone deciding it.

The EU Late Payment Directive sets a 30-day default B2B term, and Dutch law allows statutory commercial interest (around 10 % in 2026) plus a 40 EUR minimum compensation per invoice. Few SMEs claim it. The automated sequence simply mentions it in the messages, which is often enough to move the invoice up the customer's pile.

Dunning sequence and running costs

The core is an age-based sequence plugged into your accounting software (Exact Online, AFAS, Twinfield or a daily export). Each step changes channel and tone.

On collection, an iDEAL payment via Mollie or Stripe costs around 0.29 to 0.35 EUR per transaction, cards 1.5 to 2.9 %. For a wholesaler, these fees are far below the financing cost of one month's delay.

Customer contact phone numbers and emails are personal data under the GDPR, supervised by the Autoriteit Persoonsgegevens: record the processing and restrict messages to billing contacts.

Mini case study

Daan, CFO of an electrical supplies wholesaler in Amsterdam (illustrative example), manages 25 000 000 EUR of annual revenue with a DSO of 92 days. Each day of DSO represents 25 000 000 / 365 = 68 500 EUR of cash. A 25-day gain frees about 1 712 000 EUR, avoiding the same amount of credit line at 6 %, or about 102 700 EUR of interest a year. The project costs 3 500 000 FCFA (5 340 EUR) with Kolonell, plus 200 EUR of messaging and 110 EUR of maintenance a month, about 9 060 EUR in year one. Even if he chose a local agency at 25 000 EUR, and even with half the expected gain, payback would come in under six months.

FAQ

Won't WhatsApp reminders annoy good customers?

The sequence only touches overdue invoices, and customers who pay on time only receive a polite reminder at day -5. In practice, 70 to 80 % of replies to the day +1 reminder are payments or dated promises.

Do we need to change accounting software?

No. A daily export from Exact Online, AFAS or even Excel is enough for the 2 500 000 FCFA (3 810 EUR) version. Two-way sync with a heavier ERP falls in the 4 000 000 to 7 000 000 FCFA (6 100 to 10 670 EUR) band.

How long before DSO drops?

First effects show in month two, with 5 to 10 days gained. The 20 to 30-day gain is usually measured after 6 months, once old receivables are cleared.

Can customers pay directly from the message?

Yes, every message carries a payment link with the invoice reference, and reconciliation is automatic. iDEAL costs around 0.29 to 0.35 EUR per payment, cards 1.5 to 2.9 %.

What about large accounts in dispute?

The customer can reply dispute to the message: the sequence stops and a task is created for the sales rep. This avoids chasing a contested invoice in a loop for 60 days.

Let's scope your project. Share your aged receivables report and accounting tool: we will price your dunning automation between 2 500 000 and 4 000 000 FCFA (3 810 to 6 100 EUR), live within 6 to 8 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.