"What does an AI agent actually cost?" Good question — and the honest answer: it depends on what it needs to do. But you deserve a ballpark before you walk into that conversation, so here are the real ranges we're seeing in SME projects in 2026.
The three cost categories
Building an AI agent costs money in three places:
- One-time build costs — analysis, design, development, testing, integration
- Monthly infrastructure — LLM API costs (Claude, OpenAI), hosting, monitoring
- Maintenance and further development — bug fixes, model updates, new features
Realistic build costs by complexity
Simple agent (€3,000 – €8,000)
One task, one system, limited logic. For example: an agent that enriches incoming forms with data from your CRM and routes them to the right employee. Build time: 1-2 weeks.
Standard agent (€8,000 – €18,000)
Multiple steps, 2-4 system integrations, basic monitoring. For example: a sales-research agent that combines LinkedIn, your CRM and public data sources into a lead briefing. Build time: 3-5 weeks.
Complex agent (€18,000 – €50,000+)
Multiple interdependent agents, a governance layer, integrations with legacy systems, high reliability requirements. For example: an agent that drafts quotes, validates pricing against margins and generates legal text. Build time: 6-12 weeks.
Monthly costs — often underestimated
Build costs are one-time. Monthly costs add up, especially under heavy use:
- LLM API costs: €50 – €2,000+ per month depending on volume
- Hosting and monitoring: €30 – €200 per month
- Maintenance (optional): €200 – €1,500 per month for further development
An SME agent that runs 50-200x per day typically costs €100 – €500 per month in infrastructure. Scale to 1,000+ interactions per day and you're looking at roughly €1,000 – €3,000 per month.
What determines whether it pays off?
Not the price — the business case. An agent that replaces 40 hours of manual work per month pays for itself in 2-4 months, even at a €15,000 investment. An agent for a process that costs 2 hours per month is expensive by comparison.
Before you start: run an AI Readiness Assessment to determine which processes will actually deliver ROI — and which are better left alone.
Hidden costs to account for
- Data preparation — if your data is fragmented, cleaning it can take longer than building the agent itself
- Change management — an agent nobody trusts doesn't get used. Invest in training and transparency
- Governance and compliance — for sectors with privacy or compliance requirements (healthcare, financial, legal), add an EU AI Act / GDPR layer
Key takeaway
All things considered: a useful AI agent for an SME typically lands between €5,000 and €25,000 in year one, infrastructure included. Below that you get a proof-of-concept; above it you're talking complex enterprise implementations.
Next steps
Want a concrete estimate for your use case?
Schedule a meeting — we'll look at your process, estimate build costs and give you an honest business case. No cookie-cutter packages, just transparent pricing.