She should at least maximise her 20% tax band to €36,400. Based on what you said she is on a gross salary of €30,680 (590x52wks) so your sister has the scope to be paid €5,720 on PAYE and not hit the margial rate of 41%. As the previous poster said she can decide how much she wants to contibute to her pension for 2009 and ask her employer to make that payment out of her lump sum. Based on what you said she contributes €2,392, she should increase that and let the employer pay the lump sum.