The verdict in three sentences
A custom construction site tracking system costs between 35,000 and 90,000 EUR in 2026 and replaces Excel, WhatsApp and paper logbooks with a single source of truth. It saves 5 to 8 hours per week per site manager and sharply reduces handover disputes thanks to timestamped, geolocated photo traceability. For a Berlin construction firm running 8 to 15 concurrent sites, the return on investment lands within 10 to 14 months.
What a site tracking tool costs in 2026
The budget depends on functional scope, the number of field users and integration complexity (payroll, ERP, accounting). Here are the 2026 orders of magnitude for the European market.
| Scope | Functions covered | Budget EUR | Timeline |
|---|---|---|---|
| Field MVP | Clocking, photos, progress | 35,000 - 48,000 | 8-10 wks |
| Standard | + Snags, PDF reports, planning | 50,000 - 68,000 | 12-16 wks |
| Advanced | + Full offline, signature, geoloc | 70,000 - 90,000 | 18-24 wks |
| ERP-integrated | + Payroll, purchasing, billing sync | 90,000 - 130,000 | 24-32 wks |
On top of these, budget an annual maintenance of 15 to 20% of build cost, covering hosting, regulatory updates and field support.
Custom build vs off-the-shelf
SaaS vendors start at 15-45 EUR per user per month. Custom becomes cost-effective above a certain volume and when your processes do not fit the standard mould.
| Criterion | SaaS subscription | Custom build |
|---|---|---|
| Cost 30 users / 3 years | 21,600 - 48,600 EUR | 50,000 - 90,000 EUR |
| Process fit | Low to medium | Total |
| Code ownership | No | Yes |
| Marginal cost +10 users | + 5,400 EUR/yr | 0 EUR |
| Payroll/ERP integration | Limited | Native |
| True offline mode | Variable | Guaranteed |
Beyond 40 to 50 field users, or when payroll and purchasing sync is critical, custom regains the economic edge over 3-4 years.
Mini case study
Thomas, director of a 60-employee structural works firm in Berlin, runs 12 sites in parallel. His 4 site managers each spent 6 hours a week re-entering time sheets and photos in the evening. Loaded cost of a site manager: around 45 EUR/hour. Weekly loss: 4 x 6 x 45 = 1,080 EUR, or 51,840 EUR per year.
After a custom tool at 62,000 EUR, entry time dropped to 1.5 hrs/week per manager. Net annual gain: about 38,900 EUR. The investment paid back in under 20 months, before counting fewer handover disputes (2 cases avoided in year one, roughly 18,000 EUR).
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FAQ
Does offline mode really work on a site with no network?
Yes: the app stores clock-ins, photos and snags locally, then syncs as soon as 4G or Wi-Fi returns. On basement or rural sites this is essential and prevents 100% of data loss.
How long to deploy across my teams?
Expect 8 to 24 weeks of development depending on scope, then 2 to 4 weeks of gradual rollout site by site. A pilot on 1 or 2 sites before scaling greatly reduces adoption risk.
Does the mobile signature have legal value?
A simple timestamped, geolocated electronic signature is admissible evidence for snags and delivery notes. For high-stakes acts, add a qualified seal (eIDAS) for roughly 3,000 to 6,000 EUR.
Can the software connect to our payroll system?
Yes, and it is one of custom's main gains: geolocated clocked hours feed payroll directly (DATEV, Sage), eliminating double entry and making pay slips reliable.
Who owns the code and data at the end?
With custom, you own the source code and the data. It is hosted in Europe, GDPR-compliant, and exportable at any time.
Let's scope your project. Tell us your number of sites, field users and desired payroll/ERP integrations, and we will frame a scoped budget between 35,000 and 90,000 EUR. 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.
