The verdict in three sentences
Connecting a real estate CRM, an accounting ERP and property syndication via API is a 15,000-50,000 EUR integration project in 2026 for a Dublin group. The structural choice is architecture: centralised middleware (durable, scalable) versus point-to-point (cheaper up front, costly to maintain). ROI comes from eliminated double entry and data reliability, typically paying back in 10 to 16 months.
How much does an integration cost in 2026?
Budget depends on connector count, data volume and the level of flow security. Here are 2026 orders of magnitude for the Irish market.
| Scope | Content | 2026 price (EUR) | Timeline |
|---|---|---|---|
| One-off | 1–2 point-to-point connectors | 15,000 – 22,000 | 8–10 wks |
| Standard | Middleware + 3–4 connectors | 22,000 – 35,000 | 10–14 wks |
| Advanced | Middleware + 5+ connectors + monitoring | 35,000 – 50,000 | 14–16 wks |
| Broad custom | + real-time orchestration + history migration | 50,000 + | 16 wks + |
The per-connector unit cost is the clearest lever to arbitrate scope.
| API connector | Complexity | 2026 cost (EUR) |
|---|---|---|
| CRM ↔ syndication portals | Medium | 2,500 – 4,500 |
| CRM ↔ accounting ERP | High | 4,000 – 6,000 |
| ERP ↔ bank / reconciliation | High | 3,500 – 5,500 |
| CRM ↔ e-signature | Low | 2,000 – 3,000 |
| Middleware ↔ data warehouse | Medium | 3,000 – 5,000 |
Middleware or point-to-point: the right call
In point-to-point, each system talks directly to another: fast and cheap for 2 connections, but the number of links grows quadratically (5 systems = up to 10 links to maintain). A middleware (integration bus or iPaaS) centralises flows: 20 to 40 % higher initial cost, but each new system needs only one connector. Beyond 3 systems, middleware pays off over 24 months through maintenance savings. Flow security (encryption, logging, token management) is non-negotiable for financial data.
Mini case study
Karim, IT director of a Dublin real estate group, runs a sales CRM, an accounting ERP and 4 syndication portals. Today 3 staff re-key properties and receipts manually, about 24 combined hours/week. He chooses a Standard middleware integration at 31,000 EUR, plus ~5,500 EUR/year of maintenance. Automation removes 85 % of the re-keying, roughly 20 hours/week saved, ~1,040 hours/year. At a loaded cost of 12 EUR/hour, savings reach ~12,500 EUR/year, before counting the disappearance of entry errors. The investment pays back in a little over 15 months.
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What does a CRM/ERP integration cost in Dublin in 2026?
Between 15,000 and 50,000 EUR by connector count and architecture. A Standard middleware project with 3–4 connectors sits around 22,000 to 35,000 EUR.
What does a single API connector cost?
Between 2,000 and 6,000 EUR by complexity: ~2,500 EUR for property syndication, up to 6,000 EUR for a CRM ↔ accounting ERP link.
Middleware or point-to-point: which to choose?
Point-to-point for 2 stable systems; middleware beyond 3 systems, since each new tool then costs only one connector. Middleware pays off over ~24 months.
How long does implementation take?
Between 8 and 16 weeks: 8–10 for a one-off project, up to 16 for a middleware architecture with monitoring and history migration.
What annual maintenance budget should we plan?
Maintenance runs 15 to 20 % of the build, roughly 4,500 to 9,000 EUR/year, including flow monitoring and adaptation to API changes.
Let's scope your project. Tell us your systems (CRM, ERP, portals), your flow volume and your current double-entry work, and we'll frame the middleware-vs-point-to-point architecture and connector count. 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.
