The verdict in three sentences
For a network of 3 temp staffing branches placing 450 temporary workers a week, off-the-shelf software costs EUR 150 to 400 per branch per month (about GBP 130 to 345), so EUR 5,400 to 14,400 a year, versus EUR 60,000 to 120,000 excluding VAT for a custom build delivered in 6 months. Custom software only pays off if double entry of timesheets, payroll and client invoicing cost you more than EUR 35,000 a year in lost time and errors. The most profitable route in 2026 is often hybrid: a vendor core for payroll, plus a custom mobile timesheet app connected through an API.
What staffing software must cover in 2026
A staffing agency runs four critical flows: the assignment contract (issued before the worker starts, with mandatory terms), the timesheet approved by the client company, weekly or monthly payroll for the temporary worker including holiday pay and statutory deductions, then client invoicing with a charge-out rate. Every re-keying step between them creates a payroll error risk.
| Module | Off-the-shelf software | Custom build | Impact for 450 workers/week |
|---|---|---|---|
| Assignment contracts and amendments | Included, standard templates | Templates tailored to your clients | 450 to 600 contracts/week generated |
| E-signature | Option at EUR 0.80 to 1.50 per contract | Built in (Yousign, DocuSign) | EUR 1,800 to 3,600/month as an option |
| Mobile timesheets | Often web-only, weak on mobile | Worker app + client approval | End of double entry |
| Temp worker payroll | Vendors' core strength | Connector to a payroll engine | Reliable holiday pay handling |
| Client invoicing | Simple charge-out rates | Rates per client and job role | Fewer billing disputes |
| Statutory filings and reporting | Included | Must be connected, costly to rebuild | Tax and labour compliance |
| Multi-branch dashboard | Basic | Margin per client, branch, consultant | Weekly steering |
The key point: statutory payroll filings are an area where a specialist vendor spreads compliance costs across hundreds of agencies. Rebuilding them from scratch is expensive and exposes you to penalties.
Total 5-year cost: vendor, custom or hybrid
Order of magnitude for 2026 for 3 branches, 12 internal users and 450 active workers a week.
| Item (5 years) | Off-the-shelf software | Full custom build | Hybrid (vendor + timesheet app) |
|---|---|---|---|
| Licence or initial build | EUR 0 | EUR 60,000 to 120,000 | EUR 25,000 to 40,000 |
| Annual subscription or maintenance | EUR 5,400 to 14,400/yr | 15% of build, EUR 9,000 to 18,000/yr | EUR 5,400 to 14,400 + 4,000/yr |
| Setup and data migration | EUR 3,000 to 8,000 | Included | EUR 3,000 to 8,000 |
| E-signature (5 years) | EUR 25,000 to 45,000 | EUR 12,000 to 20,000 | EUR 12,000 to 20,000 |
| Remaining double-entry time | 30 h/week, about EUR 54,000/yr | Close to zero | Close to zero |
| 5-year total excluding lost time | EUR 55,000 to 125,000 | EUR 117,000 to 230,000 | EUR 87,000 to 160,000 |
| 5-year total including lost time | EUR 325,000 to 395,000 | EUR 117,000 to 230,000 | EUR 87,000 to 160,000 |
The lost-time figure is an estimate: 450 paper or PDF timesheets re-keyed at 4 minutes each, or 30 hours a week, valued at EUR 35 fully loaded cost per recruiter hour. If your current vendor already offers a mobile timesheet app approved by the client, the maths changes completely and custom software loses its appeal.
A realistic 6-month schedule
| Phase | Duration | Deliverable |
|---|---|---|
| Scoping and branch workshops | 3 weeks | Flow mapping, specification |
| Worker and client app mock-ups | 3 weeks | Prototype tested by 10 workers |
| Timesheet and contract development | 8 weeks | Mobile app, back office, e-signature |
| Payroll and invoicing connector | 5 weeks | API to the payroll vendor |
| Pilot in one branch | 4 weeks | 150 workers live |
| Rollout to 3 branches and training | 3 weeks | Full switchover |
Mini case study
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Emma, operations director of three staffing branches in Birmingham (city centre, Digbeth and Solihull), places 450 temporary workers a week in logistics and construction. Every Monday her team re-keys timesheets sent as photos or PDFs: 30 hours a week, about EUR 54,000 a year at EUR 35 per loaded hour, plus 6 to 8 payroll errors a month at EUR 150 each to fix, or EUR 12,600 a year. She chooses the hybrid route: she keeps her payroll vendor at EUR 300 per branch per month and commissions a timesheet and e-signature app for EUR 38,000. Estimated annual gain: EUR 66,600 minus EUR 4,000 maintenance, or EUR 62,600. Payback: about 7 months after go-live.
FAQ
How much does custom staffing agency software cost in 2026?
Budget EUR 60,000 to 120,000 excluding VAT for complete software covering contracts, timesheets, payroll and invoicing, with a 6-month timeline. An app focused on mobile timesheets sits between EUR 25,000 and 40,000.
Should we rebuild temp worker payroll?
Rarely. Temp payroll, with holiday pay and monthly statutory filings, is mastered by specialist vendors charging EUR 150 to 400 per branch per month. It is better to connect your custom tool to their API.
How do we eliminate timesheet double entry?
The worker logs hours on mobile, the client supervisor approves in one click, and the data flows straight into payroll and invoicing. Across 450 workers, this frees about 30 hours a week.
How long until go-live?
Six months for a full project, including a 4-week pilot in one branch. A standalone timesheet app can be delivered in 10 to 12 weeks.
Is custom software GDPR compliant?
Yes if hosting is in the UK or EU and identity documents and right-to-work checks are encrypted with defined retention periods. Allow EUR 2,000 to 4,000 for the impact assessment and processing register.
Let's scope your project. Send us your number of branches, weekly workers and current software, and we will price the hybrid or custom option with a 3 to 6-month schedule. 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.
