The collapse of financial services passporting between the UK and the European Union following Brexit remains one of the most structurally damaging regulatory events in the modern fintech era, according to commentary published in the This Week in Fintech newsletter on 5 August 2026. The author, a former e-money institution founder, argues that the loss of the single licence framework did not merely create short-term friction but permanently impaired the unit economics of every fintech operating across the two markets.
How passporting was built
Passporting did not emerge overnight. Its foundations run through the Treaty of Rome in 1957, which established freedom of establishment and capital movement, through the First and Second Banking Directives of 1977 and 1989, and culminated in the launch of the EU Single Market on 1 January 1993. The Second Banking Directive introduced the decisive mechanism: a single home-state licence with home-state supervision, meaning a firm regulated by the FCA in London could notify other member-state regulators of its intention to serve their markets without requiring a separate authorisation from each. That notification was a courtesy, not a permission request.
The Single Market transformed London into the default gateway for global firms seeking pan-European reach. US banks, Australian lenders and Asian financial institutions all anchored European operations in the UK, partly because of deep capital markets and a mature legal framework, and partly because a single FCA licence covered 450 million EU consumers alongside the domestic UK population of roughly 70 million.
The Brexit dividend no one wanted
Brexit severed that arrangement. UK-regulated fintechs suddenly faced the task of obtaining fresh licences in EU jurisdictions simply to continue serving customers they already had. The commentary describes the process as consuming management time that should have gone into product development, replacing supplier meetings with regulatory road trips to Luxembourg, Malta and the Netherlands.
The structural consequence is a permanently higher cost base. Firms operating across both markets now run two compliance functions, two sets of executive teams, two audit cycles and two regulatory reporting streams. The author’s assessment is direct: no matter how well a fintech subsequently performs, it would always have been more viable in the pre-Brexit passporting environment. The total addressable market for any new UK entrant is now structurally smaller by the entire EU population, and vice versa.
Lithuania emerged as an unintended beneficiary. By offering rapid licensing, proactive regulatory engagement and, critically, direct access to Bank of Lithuania accounts, the country attracted UK fintechs urgently seeking an EU regulatory foothold. Revolut is the most prominent example. That same central bank access, however, created a secondary problem: fintechs began accumulating large client money balances at the Bank of Lithuania, raising systemic concentration concerns. PSD3 subsequently moved to curtail the arrangement, illustrating how a regulatory arbitrage that benefits individual firms can generate macro-level risk when it scales.
Regulatory read-across
The passporting question has direct relevance to several live regulatory developments. The UK is now building its own cryptoasset regime, with the FCA’s full supervisory framework confirmed in July 2026 and set to take effect in 2027. Meanwhile MiCA’s transitional period ended on 30 June 2026, with ESMA directing unauthorised crypto-asset service providers to wind down EU operations. Firms wishing to operate in both jurisdictions under these parallel regimes face exactly the structural duplication the commentary describes: two licences, two compliance frameworks and two reporting obligations with no mutual recognition bridge in place.
Any future reset in UK-EU financial services equivalence, or a bespoke mutual recognition arrangement covering e-money or payments institutions, would directly reduce that overhead. Neither the UK government nor the EU Commission has set out a timetable for such an agreement, leaving the cost burden in place for the foreseeable future.
The broader point the commentary makes is one the industry has largely accepted but rarely quantifies cleanly: regulatory fragmentation does not merely add cost, it shifts competitive advantage toward incumbents with the capital to absorb duplicated overhead, and raises the effective barrier to entry for new market participants on both sides of the Channel.
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