The verdict in three sentences
A 68-day DSO in a 70-employee SME ties up several hundred thousand euros, often because reminders go out late and nobody quickly knows which invoices are actually paid. Automation costing 5,000 to 14,000 EUR excl. VAT (n8n or Make, banking API, accounting connector) sends 3-level reminders and reconciles 85 to 95% of bank lines on its own, within 4 to 8 weeks. The realistic target is a 50-day DSO and 15 hours a month handed back to the finance team.
Why manual reminders cost so much
In most SMEs, chasing depends on the availability of an accountant who must first check, line by line, whether the client has paid. Bank reconciliation therefore comes before chasing, and when it falls behind, so do reminders. The result: the first reminder often goes out 15 to 20 days after the due date, while a nudge sent at D+3 recovers a large share of late payments caused by simple oversight.
In Ireland, the European Communities (Late Payment in Commercial Transactions) Regulations 2012 allow statutory interest and fixed compensation of 40 to 100 EUR depending on the invoice amount. These still have to be stated and applied consistently, which automation does without hesitation.
| Step | Manual process | Automated process |
|---|---|---|
| Statement import | Manual download, 2 to 3 times a week | Daily sync via banking API (PSD2) |
| Reconciliation | Line by line, 4 to 6 h per week | 85 to 95% of lines matched automatically |
| Level 1 reminder | Sent when someone remembers, often D+15 | Polite email at D+3 with invoice attached |
| Level 2 reminder | Occasional phone call | Firm email at D+15 + call task for the account manager |
| Level 3 reminder | Letter written case by case | Formal notice generated at D+30 with interest and compensation |
| Tracking | Late payment spreadsheet | DSO dashboard per client and per account manager |
Cost of reminder and reconciliation automation in 2026
The following ranges are 2026 orders of magnitude for an SME with 50 to 150 staff, a mainstream accounting package and one or two banks. Tool subscriptions (self-hosted n8n or Make, bank aggregator) are extra.
| Scope | Content | Budget excl. VAT | Timeline |
|---|---|---|---|
| Basic reminders | 3 email levels, templates, manual exclusions | 5,000 to 7,000 EUR | 4 weeks |
| + Bank reconciliation | Banking API, matching rules, exception queue | 7,000 to 10,000 EUR | 5 to 6 weeks |
| + Dashboard | DSO per client, aged balance, cash-in forecast | 9,000 to 12,000 EUR | 6 to 7 weeks |
| Full version | All of the above + multi-bank, pay-online link in reminders, sales alerts | 12,000 to 14,000 EUR | 7 to 8 weeks |
| Recurring cost (order of magnitude) | Monthly | ||
| Make, plan sized for an SME | 20 to 80 EUR | ||
| Self-hosted n8n (server) | 15 to 40 EUR | ||
| Banking API aggregator | 50 to 200 EUR | ||
| Transactional email sending | 10 to 30 EUR | ||
| Online payment link | Per-transaction fee depending on provider |
The real work in the project is configuring matching rules: batched transfers, truncated references, partial payments, credit notes. That is what lifts the automatic rate from 70% to over 90%.
What a 50-day DSO means for cash
Cutting DSO by 18 days frees cash in proportion to revenue. The table gives the order of magnitude for a few SME sizes.
| Annual revenue | Cash freed (18 days) | Financing cost avoided at 5% |
|---|---|---|
| 5 M EUR | about 247,000 EUR | about 12,300 EUR per year |
| 8 M EUR | about 395,000 EUR | about 19,700 EUR per year |
| 12 M EUR | about 592,000 EUR | about 29,600 EUR per year |
| 20 M EUR | about 986,000 EUR | about 49,300 EUR per year |
Mini case study
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Aoife is CFO of a 70-employee industrial SME in Dublin with 12 M EUR in revenue and 400 trade clients. Her DSO stands at 68 days and her accountant spends about 20 hours a month on reconciliation and chasing.
She chooses the version with reconciliation and dashboard for 11,000 EUR excl. VAT, plus about 150 EUR a month in tools. The 15 hours freed each month, valued at a 45 EUR loaded cost, are worth 8,100 EUR a year. If DSO falls from 68 to 50 days, 592,000 EUR of cash is released, or about 29,600 EUR in financing costs avoided at 5%. Annual gain: about 37,700 EUR against a first-year cost of 12,800 EUR. Payback takes roughly 4 months.
FAQ
Will automatic reminders damage client relationships?
Level 1 is just a polite nudge with the invoice attached, and sensitive clients can be excluded in one click. In practice, more than half of late payments are oversights settled within 5 days of a reminder.
n8n or Make: which one?
Make is quicker to start and costs 20 to 80 EUR a month for an SME. Self-hosted n8n suits you better if you want to keep bank data on your own server, for 15 to 40 EUR a month in hosting.
Do we need to change accounting software?
No, the automation plugs into mainstream accounting packages through their API or scheduled exports. Only very old software without an API requires a daily file export.
What happens to the 5 to 15% of unmatched lines?
They land in an exception queue with a suggested match. The accountant approves or corrects, which usually takes 1 to 2 hours a week.
Is bank data secure?
Access goes through a PSD2-licensed aggregator, in read-only mode. The automation cannot initiate any transfer.
Let's scope your project. Share your monthly invoice volume, your banks and your accounting software: we will price a scope between 5,000 and 14,000 EUR excl. VAT, delivered in 4 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.
