If you buy an asset – shares, a second home, arts and antiques – and then sell it at a later date and make a profit, that profit could be subject to CGT. You don’t pay CGT on selling your main home (which is why MPs “flipped” theirs so regularly) or any securities sheltered in an ISA. Individuals get an annual CGT allowance (£10,600 in 2010/2011) but if you have substantial assets it’s worth paying an accountant to sort it for you.
ISA
Invidivual Savings Accounts were introduced on 6 April 1999 to replace personal equity plans (PEPs) and tax-exempt special savings accounts (TESSAs) with one plan that covered both stockmarket and savings products, the returns from which are tax-exempt. The ISA is not in itself an investment product. Rather, it’s a tax-free “wrapper” in which you place investments and savings up to a specified annual allowance where the returns (capital growth, dividends, interest) are tax-exempt (you don’t have to declare ISAs and their contents on your tax return). However, any dividends are taxed within the investment, and that can’t be reclaimed.