In this guide 6 sections
Buy a ready product when your deployment, attendance, wage and billing rules match most agencies’ rules, with one flat rate per worker and one attendance method. Build when client contracts bill oddly or wage rules differ by site, and let a trial month’s failures decide which side of that line you sit on.
What the software has to do across many sites
A staffing agency posts guards, cleaners and loaders to dozens of client sites, and each worker needs a deployment, an attendance entry, a wage slip and an invoice line. Each job feeds the next.
A wrong geofenced check-in at a warehouse gate becomes a wrong wage slip and then a wrong invoice, so the error compounds before anyone reads a statement. Ready products handle the common case well, with attendance registers, shift templates and payslip printing built in, so the real question is how far your case sits from common. Measure that distance first.
- Deployment list by client, site and role
- Attendance from site supervisors or biometric devices
- Wage sheet with statutory and insurance deductions
- Client invoice backed by attendance
- Worker onboarding: identity proof, medical fitness, background verification, licence renewals
When a ready product fits
A ready product fits when most clients pay a flat rate per head, your wage structures are few, and every site marks attendance the same way. You get working software within weeks. The vendor carries statutory changes, which means new rate tables, revised forms and updated deduction limits arrive in a release rather than in a project your team must run.
It also fits when you are growing and your process is still unsettled, because adopting a product’s way of working can beat habits that grew around sheets. It forces discipline, and that helps.
Run a trial month on two sites with different supervisors before you commit, so that the first mismatch between attendance and invoice shows up while leaving is still cheap.
When custom work earns its cost
Custom work pays off when the contract itself is the product, because the billing rules then differ from client to client in ways no standard invoice screen anticipates. One client pays wages plus a capped markup, another pays per head and fines absence, and a third wants invoices by cost centre carrying purchase order numbers.
Wage rules may differ by site. Shift allowances agreed with one client only cannot live in a generic pay screen, and the worker app should match how gate supervisors already log guards on their phones.
If you export from a ready tool into a sheet every month to repair the numbers, that sheet is already the specification for a build. Treat it as the brief.
- Markup and cap billing models
- Penalty and deduction clauses per client
- Site-specific allowances and shift rules
- Client portals and custom invoice formats
- Link to the accounting package you already use
The middle path most agencies end up on
Many agencies buy a core product for attendance and payroll and then add small custom pieces around it, such as a billing module or a client report. Statutory parts such as rate tables, return filings and form changes stay with the vendor, which keeps your custom pieces free of rules that change every year.
Check how the product exposes data. If you can pull attendance by worker and day through a CSV export or an API, a custom piece can sit beside it without touching the core. If you cannot, you are locked in.
Ask in writing who owns the code and the data for anything built, and who may change it after the first builder has moved on. Get the answer signed.
How to decide this month
List your three most awkward clients. Write beside each one exactly how it is billed, what the invoice must show, and which wage rule applies at its site.
Give the three cases to two ready-product vendors and one custom builder, and ask each for a sample invoice built from a month of your real attendance records. Compare the results line by line, checking the markup, the absence penalty and the cost-centre split, because a vendor’s demo always passes the easy case.
A product that handles all three needs no build, while one that handles two leaves a gap you can name and size. Decide on that evidence. Then write the gap list down.
Buy or build comparison worksheet
One line per awkward client. Columns list billing model, wage rules, attendance method, what a ready product did in trial, what it missed, and whether the gap needs a build.
Open a blank worksheet to printQuestions owners ask
Is custom software always more expensive?
Not in the long run if it replaces monthly manual repair work, though it costs more up front and needs upkeep from someone on your side. Count the staff hours your sheets eat.
Can we start with a ready product and build later?
Yes, provided the product lets you export workers, attendance and billing history in a form another system can read, including old months, tested before you sign.
Who maintains statutory wage rules in a custom build?
Agree it in writing, because a custom build leaves statutory tables to whoever wrote the code, which is why many agencies buy payroll and build only billing.
How many sites make a ready product worth buying?
No site count settles it. Once supervisors’ sheets take days to reconcile at month end and every client disputes a different line, a product pays for itself in recovered time.