The verdict in three sentences
In a cleaning business where net margin sits between 2 and 4%, a 1.5% drift in hours paid but never billed wipes out half the profit. Custom software for multi-site scheduling, QR or NFC clock-in and photo quality audits costs roughly GBP 35,000 to 78,000 when built by a UK agency. For 380 operatives and 220 sites in London, payback is measured in months, provided clock-in, payroll and rebilling are connected from version one.
Where a cleaning contractor's margin leaks
The managing director of a 380-operative London contractor knows the pattern: rotas in Excel, paper timesheets collected at month end, ad hoc jobs (deep cleans, window cleaning, post-construction cleans) forgotten at invoicing. The losses come from many small leaks, not a single failure.
| Source of loss | 2026 order of magnitude | Estimated annual impact (380 operatives) |
|---|---|---|
| Hours paid but not worked or not evidenced | 1 to 2% of hours | GBP 52,000 to 104,000 |
| Ad hoc jobs never rebilled | 3 to 6% of ad hoc revenue | GBP 22,000 to 43,000 |
| Poorly tracked absence cover | 2 to 4 h per site per month | GBP 26,000 to 39,000 |
| Contractual quality penalties | 0.5 to 1% of revenue | GBP 35,000 to 70,000 |
| Admin time keying payroll | 3 to 5 days per month | GBP 16,000 to 24,000 |
| Contracts lost for lack of quality evidence | 1 to 3 contracts per year | GBP 43,000 to 130,000 revenue |
On revenue of around GBP 9.5 million, these items easily exceed annual net profit. That is what makes the software investment rational rather than merely convenient.
Essential modules and their cost
Useful cleaning software rests on four connected building blocks: multi-site scheduling, field clock-in, quality control and rebilling. Off-the-shelf SaaS tools (around GBP 5 to 13 per operative per month) handle rotas well but often struggle with specifics: London Living Wage rules, TUPE transfers when you win a contract, site variations and client-specific price grids.
| Module | Key functions | Custom budget UK (GBP, ex VAT) |
|---|---|---|
| Multi-site scheduling | Assignments, cover, understaffing alerts | 9,000 to 17,000 |
| QR or NFC clock-in | On-site tag, geolocation, offline mode | 7,000 to 16,000 |
| Quality control | Site checklists, timestamped photos, client score | 6,000 to 13,000 |
| Ad hoc job rebilling | Signed job sheets, invoicing export | 5,000 to 12,000 |
| Payroll export | Hours, allowances, premiums to payroll software | 3,500 to 9,000 |
| Client portal | Quality reports, service requests | 4,500 to 11,000 |
| Indicative total | 35,000 to 78,000 |
At Kolonell, a custom application ranges from 2.5 to 15M+ FCFA (EUR 3,810 to 22,870+) depending on complexity, built by a Dakar-based team used to working for European clients. The exact scope, such as payroll integration or a full client portal, is quoted on request.
QR code or NFC clock-in: which one?
A QR code stuck on site is the cheapest option (pennies per label) and works with any smartphone, but it can be photographed and reused. An NFC tag (GBP 2 to 4 each) requires physical presence and reads in one second, which makes it more reliable for demanding clients. Either way, plan an offline mode: basement car parks and plant rooms often have no signal, and clock-ins must sync later without loss.
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James, managing director of a 380-operative cleaning contractor in London, pays around 520,000 hours a year at an average loaded cost of GBP 18. He estimates 1.2% of hours are unevidenced, i.e. 6,240 hours and GBP 112,000. After rolling out NFC clock-in linked to the rota, he brings the gap down to 0.4%, saving GBP 75,000. He also recovers GBP 27,000 of ad hoc work rebilled thanks to job sheets signed on mobile. With a GBP 60,000 project and GBP 8,000 annual maintenance, payback comes in about 8 months.
FAQ
How long does deployment take?
Allow 3 to 5 months for a first version with scheduling, clock-in and payroll export. Field rollout then happens in waves of 30 to 50 sites so supervisors can be trained without disrupting operations.
Is geolocated clock-in lawful under UK GDPR?
Yes, if geolocation is limited to the moment of clocking in, staff are informed and a data protection impact assessment is on file. The ICO frowns on continuous tracking, so the software should only record position at the tag.
SaaS or custom build?
Below 100 operatives, a SaaS at GBP 5 to 13 per operative per month is often enough. Above 300 operatives with specific contracts and price grids, custom software avoids GBP 35,000 to 50,000 of annual subscriptions and fits your own rules.
Will operatives who are not tech-savvy actually use it?
A three-button interface (start, finish, report an issue) with pictograms works in 90% of cases. Also plan one shared phone per site for operatives without a smartphone.
Do photo quality audits really convince clients?
Yes: a monthly report with timestamped photos and a quality score clearly reduces disputes. Several contractors see contractual penalties halved in the first year.
Let's scope your project. Tell us your number of operatives, sites and current payroll tools, and we will propose a scope, an indicative budget and a rollout plan. 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.
