Certain lump sum payments made to employees when they leave their employment are not reckonable earnings for PRSI purposes. Examples of such payments are redundancy payments, gratuities or ex-gratia lump sum payments and payments in lieu of notice to an employee when they retire or leave their employment (see Revenue's information leaflet
IT21 Lump Sum Payments on Redundancy/Retirement regarding the tax treatment of such payments).
However, a Health Levy (Class K contribution) is paid on the lump sum payment, or part of such a payment, that is treated as pay for income tax purposes.