Are lump sum payments taxed in Ireland?
In many payroll setups, lump sum payments are treated as taxable pay when they are paid. They can be subject to PAYE, USC and PRSI depending on your circumstances and payroll settings.
Why does a lump sum look heavily taxed on one payslip?
A lump sum can push that payslip into higher marginal PAYE and USC bands for the period. When PAYE, USC and PRSI all apply to the extra income, the combined deduction can look high.
How can I estimate the take-home amount of a lump sum?
Compare a base scenario and a scenario with additional income, and focus on the change in net pay and total deductions. Use annual view for budgeting and treat results as scenario estimates.