To apply the correct PRSI rates when a pay group’s week end date differs from its payment date during a rate change, you may need to make manual adjustments.
The PRSI rates for a payroll period are determined based on PRSI rates effective as of the transaction date or the week end date for the pay group.
Monthly payrolls: The transaction date is the last day of the month.
Weekly, fortnightly or 4-weekly payrolls: The transaction date is the week end date defined in the company payroll calendar, plus or minus any offset days set at the pay group level.
However, revenue regulations require that PRSI rates correspond to those effective on the payment date. If the payment date doesn't align with the week-end date, manual update may be necessary to ensure the correct rates are applied.
Example
If a pay group’s week end date differs from its payment date, adjustments may be needed. For instance:
Week end date: September 30 2025.
Payment date: October 1 2025.
This will require a manual update.
To manually adjust the pay groups week end date, follow the steps in the relevant section.
Portal
To adjust the pay groups week end date in portal, follow the steps below.
Click Settings then under Codes, click PayGroups.
From the Pay Group Code drop-down menu, select the relevant pay code.
Scroll to page 2 then in the PRSI Date Effective field, enter 01-Oct-2025.
Click Save.
Back Office
To adjust the pay groups week end date in back office, follow the steps below.
Click CorePay then click Reference.
Click Pay Groups.
In the Pay Group field, to select a pay group, click the list
icon.
Select the relevant pay group.
Scroll to page 2.
In the PRSI Date Effective field, enter 01-Oct-2025.
Click Save.
Outcome
Once you enter the PRSI Date Effective, the system sets the transaction date/week-end date for the pay group to 01-Oct-2025, ensuring it uses the PRSI rates effective on that date.
After you run the complete update for the pay group, the system automatically clears the PRSI Date Effective field.