Hi Eddie, I still reckon Prize Bonds are not a worthwhile investment. The only thing that has changed is that the total value of prize bonds outstanding has increased somewhat, which is good news because it increases the number of €50 prizes. This means a bigger proportion of the payout is in denominations that you actually stand a chance of winning.
To recap with the latest figures: the current Prize Bond FAQ says that there is a total of €2.3 bn invested as of June 2015. If you total up the fixed prize structure, and subtract that amount from 1.25% of the total invested (which is the current stated payout), you get the amount paid out in €50 prizes. For a €100k investment in a reasonable time horizon you can expect to win an average number of €50 and €100 prizes. The prizes of denominations greater than this represent 0.37% of the total payout, so your average return is 1.25% - 0.37% = 0.87%.
The return is tax free, so it grosses up to an equivalent of 1.47% in an account on which you pay 41% DIRT. If you are a chargeable person liable for 4% PRSI on unearned income, the gross taxed equivalent is slightly higher at 1.58%. The amounts are about the same as a Rabo 90-day notice account at 1.45%, but the Rabo option is guaranteed whereas the Prize Bond return may be higher or lower than expectations in the short run.