It is assumed that the Deputy is referring to the revised Entrepreneur Relief provided for in Section 597AA of the Taxes Consolidation Act 1997.
I am advised by Revenue that the current lifetime limit applicable to this relief is €1 million in chargeable gains. The cost of increasing this limit to the €6.5 million suggested by the Deputy would be approximately €40m in a full year. This cost is based on returns filed for the 2016 tax year, which included entrepreneur relief and does not take account of any potential behavioural change arising.