The verdict in three sentences
Automating the quote, invoicing and reminders chain for a Dublin SME costs between 6,000 and 20,000 EUR in 2026, including connection to your billing tool. The real gain is not only time: it is a DSO cut by around 15 days, freeing cash without borrowing. With e-invoicing spreading, this project is also a compliance move better anticipated than endured.
What each link costs and returns
The chain splits into three links: quote creation, invoice issuance, reminders. Each costs and returns differently. Here are the 2026 orders of magnitude for a 10 to 50-employee SME.
| Automated link | Setup cost (EUR) | Hours saved/month | Key effect |
|---|---|---|---|
| Quote -> auto invoice | 2,500-6,000 | 5-10 h | Fewer misses |
| Recurring billing | 2,000-5,000 | 4-8 h | Zero entry |
| Automatic reminders | 1,500-4,000 | 6-12 h | -15 days DSO |
| Payment reconciliation | 2,000-5,000 | 4-8 h | Books up to date |
| Client payment portal | 3,000-7,000 | 3-6 h | Faster payment |
A common scope (quote-invoice + reminders + reconciliation) lands between 8,000 and 14,000 EUR and ships in 3 to 6 weeks.
The cash impact of a lower DSO
DSO (average client payment delay) is the crux. Every day saved frees cash permanently. Here is the quantified effect by revenue.
| Annual revenue | DSO before | DSO after | Cash freed |
|---|---|---|---|
| 800,000 EUR | 55 d | 40 d | ~33,000 EUR |
| 1,500,000 EUR | 60 d | 45 d | ~62,000 EUR |
| 3,000,000 EUR | 58 d | 43 d | ~123,000 EUR |
| 5,000,000 EUR | 62 d | 47 d | ~205,000 EUR |
Even a modest DSO reduction frees more cash than the project cost itself: reminder automation self-funds within the first year.
Mini case study
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Julien, head of a 22-employee services SME in Dublin, bills 1.4M EUR a year with a 58-day DSO. Kolonell automates quote-invoice, reminders and reconciliation for 11,500 EUR. DSO drops to 44 days: about 54,000 EUR of cash freed, plus 16 hours/month handed back to the assistant, valued at 480 EUR. The investment is covered in the first quarter by the cash effect alone, before the time saving.
FAQ
Does e-invoicing change my project?
Yes, you must pick a tool compatible with the approved platforms. Anticipated well, this adds only 1,000-3,000 EUR and avoids a rushed compliance scramble.
Will automatic reminders upset my clients?
Not if they are gradual and personalised: courteous nudge at D+3, firm reminder at D+15, escalation at D+30. The tone is set client by client.
Must I change my billing software?
Not necessarily. Most tools (Pennylane, Sellsy, QuickBooks) expose a usable API. We automate around what exists where possible.
How much is maintenance?
Budget 100-300 EUR/month to monitor connectors and adjust reminder rules. It is marginal against the cash freed.
Let's scope your project. Send us your billing tool, monthly invoice volume and current DSO: we will price quote-invoice-reminder automation with an estimate of freed cash. 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.
