Open Banking in United Kingdom

The United Kingdom stands as one of the most advanced open banking ecosystems in the world, born out of a Competition and Markets Authority (CMA) investigation into the retail banking market. The resulting CMA Order of 2017 required the nine largest current account providers (known as the CMA9) to adopt open banking standards, making customer account data and payment initiation available via secure APIs.

The Open Banking Implementation Entity (OBIE) was established to develop technical standards, manage the trust framework, and oversee adoption. The UK Open Banking Standard, now at version 4.0, provides detailed specifications for Read/Write APIs, security profiles aligned with FAPI 1.0 Advanced, and comprehensive customer experience guidelines. These standards go beyond the EU's PSD2 requirements in specificity and usability.

By 2023, the ecosystem had surpassed 7 million active users and processed billions of API calls monthly. Innovations such as variable recurring payments (VRP) for sweeping use cases demonstrated the UK's continued leadership. The ecosystem supports use cases ranging from personal financial management and credit scoring to business accounting integration and alternative lending.

In 2022, oversight transitioned from the CMA to the Joint Regulatory Oversight Committee (JROC), co-chaired by the FCA and the Payment Systems Regulator (PSR). JROC's 2023 recommendations laid out a roadmap to expand into open finance, covering a wider range of financial products including investments, pensions, and insurance. The UK government has also proposed legislation to establish a long-term regulatory framework for smart data schemes, providing a sustainable foundation for open banking and open finance.

The UK's experience has served as a model for jurisdictions worldwide, particularly in the design of implementation entities, trust frameworks, and API standards. With approximately 85% of household deposits held by CMA9 banks, the mandate achieves broad market coverage.