Payroll self service moves routine changes from a payroll inbox to the person they concern. Done well it removes most of the queue; done carelessly it is the easiest route into a payroll diversion fraud.
Open the things only the employee knows
Address, contact details, emergency contacts, and viewing or downloading payslips and year-end documents. These are changes the employee is the authority on, they generate most of the inbound queries, and getting them out of an inbox is the whole business case. Start here, get it adopted, then consider anything else.
Bank details are the control point, not a convenience
Requests to change bank details are the standard payroll fraud, and self service makes them easy to submit. Require verification through a separate channel, notify the previous address or number when a change is made, and put a short hold before the change affects a payment. These three steps stop nearly all of it and cost very little.
Some things must stay with payroll
Pay rates, tax codes, deductions, court orders and anything that changes gross pay. Employees can see them but should not edit them. The same applies to anything that would let a manager change their own pay, which is why the permission model matters as much as the feature list.
Access has to end when employment does
Leavers still need their final payslip and year-end documents, so cutting access on the last day creates a manual task. Decide the rule: time-limited access afterwards, or a document pack issued at exit. Either is fine and leaving it undecided means an ad hoc request to payroll from every leaver.
Questions people ask about payroll self service
Does self service reduce payroll workload?
Usually yes, on routine queries. It moves the effort to permissions, verification and the controls around bank details.
Should payslips be emailed instead?
A portal is better for confidentiality and record keeping. If you email, protect the attachment and keep an issue record.
What is the main risk?
Bank detail changes made by someone who is not the employee. Verify out of band and notify the change.