The verdict in three sentences
Replacing several SaaS subscriptions with custom software only makes sense if the ROI math holds on three levers: license savings, time saved and listing volume. For a real-estate agency, a build at 52,000 EUR wipes out 1,900 EUR/month of licenses and frees 9 hours/week per agent. Break-even lands at 21 months, after which every month is net gain.
The before / after cost
The first lever is obvious: add up the SaaS subscriptions and the duplicate entry they impose. An agency often juggles a CRM, a listing-sourcing tool and a matching tool, with no bridge between them.
| Item | Before (SaaS) | After (custom) |
|---|---|---|
| Monthly licenses | 1,900 EUR | 0 EUR |
| Annual license cost | 22,800 EUR | 0 EUR |
| Initial build | 0 EUR | 52,000 EUR |
| Monthly maintenance | included | 650 EUR |
| Duplicate entry | daily | eliminated |
| Buyer-listing matching | manual | automated |
On licenses alone, the agency saves 22,800 EUR/year. After maintenance (7,800 EUR/year), the net annual saving reaches 15,000 EUR.
The detailed ROI calculation
The second, more powerful lever is time saved per agent and the increase in listings handled.
| Indicator | 2026 order of magnitude |
|---|---|
| Custom build | 52,000 EUR |
| License saving | 1,900 EUR/month |
| Time saved / agent | 9 h/week |
| Increase in listings handled | +18% |
| Monthly maintenance | 650 EUR |
| Break-even | 21 months |
| Net annual saving (licenses) | ~15,000 EUR |
Automated buyer-listing matching is the core gain: it removes hours of manual search and lets the team handle more files at constant headcount.
Mini case study
Sophie, manager of a 5-agent agency, pays 1,900 EUR/month for 3 disconnected SaaS licenses. She invests 52,000 EUR in a custom portal with automated matching. Each agent saves 9 h/week, i.e. 45 h/week for the team, reallocated to prospecting. This extra capacity yields +18% listings handled. On an average commission of 6,000 EUR per deal and 40 deals/year, +18% means about 7 additional deals, i.e. 42,000 EUR of extra commissions per year. Added to the 15,000 EUR net license saving, the 52,000 EUR build is amortized well before the conservative 21-month break-even.
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FAQ
How do you justify 52,000 EUR against 1,900 EUR/month subscriptions?
By the cumulative cost: licenses alone are 22,800 EUR/year. Over 3 years that's 68,400 EUR without ever owning the tool. Custom amortizes in 21 months and becomes an asset.
Is the time saved really 9 hours/week?
That's the observed order of magnitude when you remove duplicate entry and manual matching. It varies by organization, but 6-9 h/week/agent is realistic.
What does the 650 EUR/month maintenance cover?
Bug fixes, small enhancements, support and security updates. That's about 15% of the build per year, a standard ratio for line-of-business software.
Is the +18% listings guaranteed?
No, it's an estimate tied to time reallocated to prospecting. The gain depends on local demand, but the additional capacity is mechanical.
Can the portal connect to listing platforms?
Yes, via bridges to the main listing platforms. Automatic listing distribution is among the enhancements commonly budgeted in maintenance after go-live.
Let's scope your project. Share your current subscriptions, agent count and listing volume, and we price the build and model your 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.
