Is the expected rise in capital gains tax going to take immediate effect?
Until it is confirmed, no-one knows for certain. Typically, it would be announced in the pre-budget report and implemented the following April. It is highly unlikely, as a previous poster states, that it would be bought in retrospectively from April 2010, and putting it through immediately may cause an administrative nightmare in the tax department keeping records of a change in tax rate on a personal tax level mid year (especially since they had problems with tax code notices in April with a new system being implemented). I predict it starting April next year, but don’t quote me on it if it happens earlier!