PSD2 (Payment Services Directive 2)
Definition
The EU directive (2015/2366) that regulates payment services and payment service providers, mandating strong customer authentication, open banking through account access APIs (XS2A), and enhanced consumer protection. PSD2 has fundamentally reshaped the European payments landscape by requiring banks to provide licensed third parties with access to customer account data and payment initiation capabilities. It is a cornerstone of the open banking movement and has enabled an ecosystem of fintech services built on bank-held data.
Complementary Terms
Concepts that frequently appear alongside PSD2 (Payment Services Directive 2) in practice.
An EU legislative framework (PSD2, Directive 2015/2366) governing payment services and payment service providers across the European Economic Area. PSD2 introduced requirements for strong customer authentication, mandated open access to payment account data for authorised third parties (enabling open banking), and created new categories of regulated payment institutions.
Firms that provide specialist knowledge-based services such as consulting, engineering, IT services, legal advisory, and financial analysis. KIBS firms are characterised by high intangible asset intensity, with the majority of their enterprise value derived from human capital, client relationships, proprietary methodologies, and reputation.
A regulatory and technological framework that enables third-party financial service providers to access consumer banking data through secure APIs, with the customer's explicit consent. In the UK, open banking was mandated by the CMA's Open Banking Remedy (2018) and is governed by the Open Banking Implementation Entity.
A financial institution licensed by card networks to issue payment cards (credit, debit, or prepaid) to consumers and businesses. The issuing bank extends credit or provides access to deposited funds, bears the cardholder's credit risk, and receives interchange fees on each transaction.
A regulatory authorisation granted to financial technology companies permitting them to offer specific financial services such as payments, lending, investment management, or insurance. Licencing requirements vary by jurisdiction and activity — in the UK, the FCA regulates fintech firms under frameworks including the Payment Services Regulations, the Electronic Money Regulations, and the FCA Regulatory Sandbox.
The ecosystem of business models, partnerships, and revenue streams enabled by application programming interfaces that allow software systems to communicate and share data. APIs enable companies to monetise their data and functionality, create platform ecosystems, and embed services into third-party applications.
The integration of financial services — such as payments, lending, insurance, or investment — directly into non-financial platforms and customer journeys. Embedded finance enables companies like e-commerce platforms, SaaS providers, and gig economy marketplaces to offer financial products without becoming licensed financial institutions, typically through Banking-as-a-Service partnerships.
A financial ecosystem built on blockchain technology that provides financial services — including lending, borrowing, trading, insurance, and asset management — without traditional intermediaries such as banks, brokerages, or exchanges. DeFi protocols use smart contracts to automate financial transactions and are typically open-source, permissionless, and composable.
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