A fingerprint reader is a device; a fingerprint time clock system is everything around it. Enrolling a workforce, handling the reads that fail, deciding where templates live, deleting them when somebody leaves, and getting clean hours into payroll are the parts that take time and the parts that decide whether the purchase works.
The override path is the weak point
Every reader refuses somebody eventually, and the refusal becomes a supervisor override. An override that is not logged against a named person is indistinguishable from the buddy punching the system was bought to prevent, which means an unlogged override quietly undoes the entire business case. Insist on attribution and review the override rate monthly.
Retention and deletion you can evidence
Templates need a retention schedule and a deletion process, and you should be able to show that a leaver's template went. Ask how deletion is evidenced before buying, because a product that cannot demonstrate it leaves the obligation with you and no way to discharge it. This is ordinary work and it is the part of the project nobody budgets.
The export to payroll
The point of the system is hours that reach pay without retyping. Ask for an export in the exact format your payroll accepts and have whoever runs payroll import it during the trial. A system that captures beautifully and produces a file nobody can use has moved the work rather than removed it.
Questions people ask about fingerprint time clock system
Where should templates be stored?
On the device where possible, which keeps biometric data local and makes your duties easier to discharge. Get the answer in writing either way.
What should the override rate be?
Low and falling after enrolment settles. A rate that stays high means the sensor does not suit your workforce.
Does the system handle breaks and overtime?
That is the clock software rather than the reader. Check it encodes your own rounding, grace and break rules rather than a default.