What does “cumulative” mean on an Irish payslip?
Cumulative payroll usually means your PAYE calculation considers income and credits to date across the tax year. That can cause month-to-month variation even when your base salary is stable.
Why can PAYE change even if my salary is the same each month?
Changes can come from cumulative treatment, credits being updated, overtime/bonus payments, or payroll timing. A mid-year job change can also cause a visible adjustment.
Is a calculator enough to reconcile my payslip?
Not always. A calculator is best for planning scenarios. Payslip reconciliation needs your exact payroll basis, credits allocation and timing across the year.