Because enrolment happens with a provider and payroll happens in a different system. The deduction or contribution is added manually, and the month it starts is the month it is most often missed.
What each person is enrolled in — healthcare, pension, allowances — with start and end dates and any payroll consequence.
Enrolments are records with dates. Where a benefit affects pay, the run applies it from the effective date without anyone remembering.
Somebody joins the pension scheme on the 12th. The run pro-rates the contribution from that date, and the employer cost posts to the ledger.
It does not enrol people with providers or exchange data with them. Enrolment happens with the provider; Nest records it and handles the payroll side.
Payroll applies deductions and contributions. Books posts employer cost. Offboarding lists what needs ending.
Yes, or by location, contract type or individually.
Active benefits appear as items to end.
On the payslip, where it is a deduction.
Fourteen days, every module, no card. Or half an hour with someone who will run it on your own records and tell you where it does not help.