In the last tax year 2012/13 it was possible to eliminate CGT on a gain if you reinvested at least the amount of the gain into a risk investment under the Seed Enterprise Investment Scheme (SEIS).
This valuable CGT relief has been continued into the current tax year, but with a restriction in that only half the qualifying reinvested amount can be set against the chargeable gains. It is therefore never possible to shelter more than half of the gain via an SEIS reinvestment.
What this means is that with SEIS relief at 50% and CGT reinvestment relief available on half of the gain, the total tax relief on offer is 64%. Well worth considering!