PRSA but no taxable income
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Fair point about carrying forward contributions for tax relief: I was trying to keep things simple, but maybe overdid it.
On your other point: if PRSA contributions do not get tax relief then they are a reasonable investment only if the proceeds will be tax-free, i.e. if you will not have enough income in retirement to take you into the tax net. If they will be taxable, then other forms of saving are probably better e.g. life assurance based saving, as the maximum tax rate will be 23%ish at on net growth.
The issue of the need to save for retirement is different: an individual should look at whether they need to save for retirement, then at what is the most suitable saving vehicle, taking into account flexibility, value for money, risk, return, and tax efficiency.
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