Estate planning describes the process of arranging a person’s assets, liabilities and personal affairs during lifetime to control how they are managed, protected and distributed on incapacity and death. It is a descriptive term rather than a defined statutory concept in the UK or Ireland, and cuts across succession law, tax, trusts, family law and elder law.In practice, estate planning typically involves: drafting wills; creating lifetime trusts; using gifts and family investment structures; succession planning for family businesses; appointing attorneys under lasting/enduring powers of attorney; providing for vulnerable or minor beneficiaries; and coordinating pensions, life policies and survivorship arrangements.Advisers must consider inheritance tax (England & Wales, Scotland, Northern Ireland), capital acquisitions tax (Ireland), capital gains tax, income tax and stamp duties, as well as forced heirship rules in Ireland and Scottish legal rights, which can restrict testamentary freedom. Northern Ireland largely follows the law of England & Wales, with local procedural and land law variations.Estate planning is central to risk management, asset protection, tax efficiency and the prevention of family disputes, and often requires multi‑jurisdictional and cross‑border analysis.