The verdict in three sentences
Construction site management software in 2026 costs between 30 and 90 EUR/user/month as SaaS and between 50,000 and 140,000 EUR custom-built. SaaS wins on speed and upfront cost; custom wins as soon as your progress billing, time tracking and accounting have specific logic. The real ROI comes from project delays cut by 20 % and billing disputes cut by 30 %.
SaaS vs custom development: the 2026 numbers
Construction SaaS vendors (Procore, PlanRadar, Buildertrend) charge per user. Custom becomes worthwhile beyond 20-30 users or when standardisation costs more than development.
| Criterion | Construction SaaS | Custom-built |
|---|---|---|
| Upfront cost | 0 - 3,000 EUR (setup) | 50,000 - 140,000 EUR |
| Monthly cost | 30 - 90 EUR/user | 600 - 1,500 EUR (hosting + support) |
| Time to launch | 2 - 6 weeks | 3 - 6 months |
| Offline field app | Vendor-dependent | Custom, guaranteed |
| Accounting integration | Standard connectors | Fully tailored |
| Progress billing | Fixed template | Your own logic |
| Code ownership | No | Yes |
The modules that drive the price
Site software is not monolithic: each module adds budget. Here are 2026 ballpark figures for a custom build.
| Module | Complexity | Range (EUR) |
|---|---|---|
| Site tracking + scheduling | Medium | 12,000 - 25,000 |
| Quotes + progress billing | High | 15,000 - 35,000 |
| Geolocated crew time tracking | Medium | 8,000 - 18,000 |
| Offline mobile field app | High | 15,000 - 30,000 |
| Photos + site reports | Low | 5,000 - 12,000 |
| Accounting integration | Medium | 8,000 - 20,000 |
| Margin dashboards | Medium | 6,000 - 15,000 |
Progress billing (billing by completion) is the most underestimated module: retention holdbacks, price revisions, shared-cost accounts. That's often where SaaS shows its limits.
Mini case study
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Mark runs a 45-employee structural works firm in Toronto, with 12 simultaneous sites. Before, paper time sheets and Excel-based billing generated 3 billing disputes per quarter, roughly 18,000 EUR of recurring cash-flow lag. He invests 78,000 EUR in a custom solution (offline field app + progress billing + accounting integration).
Over 12 months: disputes drop from 12 to 4 a year (-67 %), billing goes out 9 days earlier, and real-time tracking avoids 2 budget overruns worth an estimated 40,000 EUR. Payback in about 14 months, excluding admin time savings (estimated 0.5 FTE).
FAQ
Should I start with SaaS or custom? With fewer than 10 users and standard processes, SaaS at 30-90 EUR/user is fastest. Beyond 20 users, custom typically pays off within 12 to 24 months.
Does the field app work without signal? Yes, a well-built app syncs data offline (photos, time tracking, progress) and uploads it once signal returns. Essential on poorly covered sites.
How much is annual maintenance? Budget 15 to 20 % of the development cost per year, i.e. roughly 8,000 to 20,000 EUR for an 80,000 EUR project.
Can we integrate our existing accounting? Yes, most accounting software exposes APIs or imports. Integration runs 8,000 to 20,000 EUR depending on the automation level.
How long for a first usable version? A functional MVP (site tracking + time tracking + photos) ships in 2 to 3 months; the full version with billing and accounting in 5 to 6 months.
Let's scope your project. Tell us your number of sites, field users and accounting software, and we'll define a scope with an indicative budget. 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.
