CGT (capital gains tax) is the tax charged on gains (profit) realised when a chargeable asset is disposed of, such as by sale, gift or exchange. In UK practice (England and Wales, Scotland and Northern Ireland), CGT is imposed under the Taxation of Chargeable Gains Act 1992 and related legislation, and applies to individuals, trustees and, in some cases, personal representatives; companies are generally subject instead to corporation tax on chargeable gains. In Ireland, capital gains tax is governed principally by the Taxes Consolidation Act 1997 and operates on similar principles, though rates, reliefs and exemptions differ from the UK regime. Across all these jurisdictions, key CGT issues for practitioners include: identifying a “disposal”; determining the acquisition and disposal consideration; calculating chargeable gains or allowable losses; applying reliefs (for example, principal private residence relief in the UK, retirement relief or entrepreneur relief in Ireland); and advising on reporting and payment deadlines. CGT planning is central in private client, property, corporate, trust and succession work, particularly on restructuring, share sales, real estate transactions, family wealth transfers and estate administration.