This Practice Note summarises the Standard for Automatic Exchange of Financial Account Information, developed by the OECD with G20 countries. Finalised in July 2014, the Standard represents the international consensus on automatic exchange of financial account information for tax purposes, on a reciprocal and annual basis. It sets out the financial account information to be exchanged, the Financial Institutions (FI) required to report, the different types of accounts and taxpayers covered, as well as common due diligence procedures to be followed by FIs. The Standard comprises a Model Competent Authority Agreement (Model CAA) and the Common Reporting and Due Diligence Standard (CRS) together with commentaries and annexes. The standard has been implemented into UK law via the International Tax Compliance Regulations 2015, SI 2015/878. This Practice Note was produced in partnership with Ali Kazimi and Chris Orchard of Hansuke Consulting Limited.