Am 55 years, working in public sector, D rate PRSI, will have approx. 34 years service at 65 years, is it possible to buy A rate PRSI or is there any advantage to doing this? I don't have widows or orphans on my D rate. My projected pension at 65 will be about 19,000. Husband is self employed with a mix of A rate and now S rate PRSI.