Business Asset Rollover Relief is a valuable relief that allows for the deferral of Capital Gains Tax (CGT) on gains made when taxpayers sell or dispose of certain assets and use all or part of the proceeds to buy new business assets. The relief means that the tax on the gain of the old asset is postponed. The amount of the gain is effectively rolled over into the cost of the new asset, and any CGT liability is deferred until the new asset is sold.