Temp Staffing Agency Software for Construction Timesheets in 2026

The verdict in three sentences

A construction staffing agency placing 350 temporary workers a week handles 350 timesheets every Friday, as many assignment contracts and a weekly payroll under pressure. Market vendors, at EUR 1,500 to 4,000 a month, cover payroll and invoicing, but rarely mobile timesheet approval by the site foreman in real field conditions. A custom tool built in 3 to 5 months, connected to your payroll software, removes re-keying and secures the legal deadlines for sending contracts.

Friday at a construction staffing agency

Construction concentrates every staffing headache: sites spread across a metro area, foremen who are hard to reach, hours that vary with the weather, meal and travel allowances calculated by zone, and workers waiting for their advance on Friday evening. Our reference case is an agency in Marseille, France, where labour law requires the assignment contract to reach the worker within two working days of the start of the assignment. Similar deadlines and audit trails apply in most European markets.

Close to 95 hours a week go into admin tasks, more than two full-time equivalents. And the 4% timesheet discrepancy rate triggers billing disputes that delay payment from client companies.

Vendor software or a custom layer

Specialist staffing vendors charge, as a 2026 order of magnitude, EUR 1,500 to 4,000 a month for an agency this size, i.e. EUR 18,000 to 48,000 a year. They handle payroll, social declarations and invoicing well. Their timesheet app, when there is one, is usually designed for office temping: the worker enters hours, an office manager approves. It fits poorly with a foreman approving 25 people from his phone at 5 pm on scaffolding.

For an agency placing 350 workers a week, the custom layer is the best trade-off: the vendor keeps payroll and statutory duties, while the site app captures hours at the source and pushes them to payroll through an API or an import file.

What the site app does

For the foreman: today's crew list, hours prefilled from the schedule, one-tap corrections (late arrival, bad weather), signed batch approval on Friday, and offline mode because basements and rural sites have poor coverage. For the worker: assignment contract received by SMS, e-signature compliant with the EU eIDAS regulation, view of approved hours and advance requests. For the agency: dashboard of unsigned contracts at day +1, alerts before the two working day deadline, checks on certifications and the construction professional ID card, export to payroll.

A typical plan: three weeks of scoping with two pilot clients and a vendor API audit, two months of development, one month of pilot with 60 workers, then full rollout.

Mini case study

Karim Benali, manager of the Marseille agency, estimates the effect over 47 working weeks:

• Collection and keying cut by 85%: (23 h + 35 h) × 85% = 49 h a week
• Discrepancies cut from 4% to 1%: 6 h × 75% = 4.5 h a week
• Contract chasing halved: 1.5 h a week
• Total: 55 h × 47 weeks = 2,585 h a year, at a EUR 32 loaded hourly cost, i.e. EUR 82,720 a year

The site app, a medium application at EUR 6,100 to 10,670, plus EUR 114 monthly maintenance, pays back in under two months. Karim plans to move one of the two freed admin roles into business development with structural works contractors.

FAQ

Is e-signature of assignment contracts legally valid?

Yes, an e-signature compliant with the eIDAS regulation has the same value as a handwritten one in the EU. The tool timestamps sending to prove the two working day deadline was met.

Will foremen actually use the app?

That is the main risk, so the interface is built for batch approval of 25 workers in under 2 minutes. In our pilots, adoption exceeds 80% by week three when the client company makes it part of its process.

Do we have to change payroll software?

No, the site app sends approved hours to your current software via API or import file. Payroll and social declarations stay with the vendor, which limits risk.

How long until we are up and running?

Allow 3 to 5 months, including a one month pilot with about 60 workers. Full switchover then happens client by client over 2 to 4 weeks.

Can weekly pay advances be handled in the app?

Yes, workers request an advance based on approved hours, and the agency processes it in payroll. The weekly cap is configurable, for example 70% of estimated net pay.

Let's scope your project. We define with you the site app and its connection to your payroll software, with a working pilot in 3 to 5 months. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.