Tax will only arise from any possible increase in land values attributable to rezoning in the event of a disposal of such rezoned land at which point capital gains tax would be charged on any gain arising.
The value to the Exchequer of any capital gains tax arising should landowners dispose of such rezoned land will, in general, be 40 per cent of the landowner's chargeable gain. The chargeable gain accruing on the disposal of an asset is calculated by deducting from the consideration received for the disposal the cost of the acquisition of the asset and any expenditure incurred on its enhancement. The amounts so deductible may be adjusted to take account of inflation. In the case of a disposal of development land this indexation relief is confined to the amount of the current use value of the land at its time of acquisition or at 6 April 1974, if acquired prior to that date. The first £1,000 of an individual's chargeable gains in any year of assessment is exempt.