The verdict in three sentences
A custom certification tracking app costs GBP 16,000 to 35,000 (excl. VAT) for a 420-employee company, delivered in 2 to 4 months. It replaces a fragile spreadsheet with automatic alerts at 90 and 30 days, QR code checks on site and clean exports for main contractors. The payback is less about hours saved than about risk avoided: an electrician working with an expired qualification exposes the employer under the Health and Safety at Work Act and can get a whole site stopped.
What the spreadsheet stops doing at 420 employees
A London HSE manager typically tracks 6 to 9 credentials per electrician: ECS/JIB card, 18th Edition (BS 7671), IPAF for MEWPs, PASMA for towers, CSCS, first aid at work, working at height, occupational health surveillance and sometimes CompEx for hazardous areas. Across 420 staff that means 3,000 to 3,500 expiry dates, with roughly 30% expiring each year.
The usual symptoms: an unsorted date column, refresher courses booked in a rush at full price, a site supervisor who cannot confirm on the spot whether an agency worker is qualified, and a main contractor asking for a list of valid credentials before site access.
| Criterion | Shared spreadsheet | Generic HR SaaS | Custom app |
|---|---|---|---|
| Upfront cost | GBP 0 | GBP 0 to 2,500 setup | GBP 16,000 to 35,000 |
| Annual cost (420 staff) | HSE time only | GBP 5 to 8 per employee per month, i.e. GBP 25,000 to 40,000 | GBP 2,200 to 4,300 maintenance and hosting |
| Alerts before expiry | Manual | Yes, generic | 90 and 30 days, per credential and per manager |
| On-site checks | No | Rarely | QR code on badge, offline lookup |
| Electrical business rules | No | Partial | Coded, with prerequisites between credentials |
| Main contractor export | Copy-paste | Raw CSV | PDF and Excel in each client's format |
| Refresher planning | No | Basic | Grouped by session and training provider |
What each building block costs in 2026
The budget mainly depends on the number of business rules and the integrations with HRIS or payroll. Here is a realistic 2026 estimate for a UK or nearshore agency.
| Module | Scope | Indicative budget (excl. VAT) | Timeline |
|---|---|---|---|
| Employee and credential register | HRIS import, credential catalogue, validity periods | GBP 3,000 to 5,200 | 2 to 3 weeks |
| Alert engine | 90 and 30 day alerts, email and SMS, manager escalation | GBP 2,200 to 4,300 | 1 to 2 weeks |
| QR code site checks | QR badge, PWA mobile app, offline mode | GBP 3,500 to 7,000 | 3 weeks |
| Refresher planning | Sessions, training providers, joining instructions | GBP 2,600 to 6,000 | 2 to 3 weeks |
| Main contractor exports | PDF and Excel templates per client, history | GBP 1,700 to 4,300 | 1 to 2 weeks |
| Evidence storage | Certificates, fitness-for-work outcomes, encryption, access rights | GBP 1,700 to 3,900 | 1 to 2 weeks |
| HRIS or payroll integration | Starters and leavers sync | GBP 900 to 3,900 | 1 to 2 weeks |
A core version (register, alerts, QR code, exports) fits in GBP 16,000 to 21,000 and 2 months. The full version with refresher planning and HRIS integration reaches GBP 28,000 to 35,000 and 4 months.
UK GDPR note: the occupational health outcome (fit, fit with restrictions) is stored, the medical record never is. Access is limited to HR and HSE, with an audit log.
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Mini case study
James, HSE manager of an industrial electrical contractor in London, 420 staff including 310 technicians. Before the project he spent 2 days a month updating the file and chasing people, about 24 days a year at GBP 330 fully loaded, so GBP 7,900. Rushed refresher bookings cost him on average 15% more than grouped sessions, on a compliance training budget of GBP 120,000: roughly GBP 10,500 of avoidable overspend.
With a GBP 24,000 app plus GBP 3,000 a year of maintenance, the direct gain is about GBP 18,000 a year. Payback lands at 16 to 18 months, before counting the value of a single avoided incident or a refused site access.
FAQ
Do we need custom software or is a SaaS enough? Below 100 staff with few credentials, a SaaS at GBP 4 to 7 per employee per month is often enough. Above 300 staff with precise electrical rules and per-client exports, custom becomes cheaper from year 2.
Do QR code checks work without signal? Yes, if the app is built as a PWA with local cache. The supervisor sees credentials synced within the last 24 hours, even in basements or dead zones.
How do we handle agency workers? We create an external profile with credentials supplied by the agency, and alerts go to the agency. This module usually adds GBP 1,300 to 2,600.
Is health data a UK GDPR issue? Only the fitness outcome and its date are stored, with restricted rights and an access log. A short DPIA takes 2 to 3 days to write.
Can we migrate our spreadsheet history? Yes, migrating 3,000 to 5,000 rows takes 3 to 5 days including de-duplication, and costs GBP 1,300 to 2,600.
Let's scope your project. Send us your credential list and headcount: we will price a core version deliverable in 8 weeks. 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.
