The verdict in three sentences
In 2026, automating a single business process in a London SME costs between 1,500 and 12,000 EUR depending on complexity and the chosen tool. A realistic project across three processes (invoice chasing, client onboarding, reporting) runs around 6,000 to 25,000 EUR, with payback reached in 4 to 8 months. The real lever isn't the technology but picking high-volume, low-variability processes.
How much automation costs by tool
Three tool families dominate the London market: hosted no-code platforms (Make, Zapier), open-source self-hosting (n8n) and custom development. The choice depends on operation volume, confidentiality requirements and business-rule complexity.
| Approach | Setup cost (EUR) | Monthly cost | Timeline | Best for |
|---|---|---|---|---|
| Make / Zapier | 1,500 - 4,000 | 20 - 250 EUR | 1 - 2 wks | Simple flows, low volume |
| Self-hosted n8n | 3,000 - 8,000 | 40 - 120 EUR | 2 - 4 wks | Medium volume, sensitive data |
| Custom (API) | 6,000 - 12,000 | 80 - 300 EUR | 4 - 8 wks | Complex rules, high volume |
| Hybrid n8n + code | 5,000 - 10,000 | 60 - 200 EUR | 3 - 6 wks | Best cost/robustness ratio |
The monthly cost covers hosting, API quotas and corrective maintenance. For an SME of 15 to 60 staff, the hybrid n8n + custom connectors approach offers the best 2026 balance between contained upfront cost and robustness.
Hours saved and ROI per process
ROI is calculated process by process. Below are 2026 orders of magnitude observed at London service SMEs, with an average loaded cost of 35 EUR/h.
| Automated process | Hours/mo before | Hours/mo after | Saving EUR/mo | Project cost (EUR) |
|---|---|---|---|---|
| Overdue invoice chasing | 22 | 4 | 630 | 3,500 |
| New client onboarding | 18 | 6 | 420 | 4,500 |
| Weekly reporting | 16 | 2 | 490 | 3,000 |
| Supplier order entry | 25 | 7 | 630 | 5,000 |
| Support email triage | 30 | 12 | 630 | 4,000 |
A portfolio of three high-volume processes therefore easily generates 1,500 to 1,900 EUR in monthly savings, meaning payback in under 8 months on a 12,000 EUR budget. Beyond hours, you gain reliability (fewer missed chases) and faster processing times.
Mini case study
Claire, CFO of a 45-staff industrial SME in London, spent 22 h/mo on client chasing and 16 h/mo on a manually consolidated Excel report. Kolonell deploys an n8n workflow: detection of overdue invoices in the accounting software, graduated email/SMS chasing, and a reporting dashboard generated automatically every Monday.
Budget: 7,800 EUR, delivered in 5 weeks. Monthly gain: 38 h x 35 EUR = 1,330 EUR, plus an 8-day DSO reduction that frees cash. Payback reached in 5.9 months. In year two, net savings exceed 15,000 EUR excluding the cash-flow gain.
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FAQ
What minimum budget to start seriously?
Budget 3,000 to 5,000 EUR for a first well-scoped process with n8n. Below that, you stay on Zapier at 1,500 EUR, which quickly hits its limits on volume and reliability.
How long before I see a return?
On a high-volume process (chasing, entry, reporting), the return materialises in 4 to 8 months. Processes worth under 10 h/mo often take more than 12 months to pay back.
Is there a lifetime monthly subscription?
Yes, budget 40 to 300 EUR/mo for hosting, APIs and maintenance. That's marginal against the 500 to 1,900 EUR/mo saved by a three-process portfolio.
No-code or custom?
No-code (Make) suits under 2,000 operations/mo. Beyond that, or with complex business rules, custom or hybrid n8n becomes cheaper over 24 months as it avoids punishing pricing tiers.
Can we automate without changing our software?
Yes in 80% of cases: we connect the existing stack via API or webhooks. Only very old software with no exchange interface requires an extra integration layer, quoted separately.
Let's scope your project. Tell us your 3 most time-consuming processes and your current stack: we'll price the portfolio, the indicative budget and expected ROI. 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.
