The European Central Bank published an Occasional Paper analysing how the European Union’s bank capital framework implements Basel Committee standards and how EU-specific choices affect required capital for banks supervised under the Single Supervisory Mechanism. Using granular supervisory data, the authors find that most EU capital requirements stem from Basel standards, EU “super-equivalent” add-ons are limited in aggregate, and overall requirements are broadly comparable with other major jurisdictions. For a sample of 113 significant institutions, prescriptive Basel elements (Pillar 1 minimum requirements, the capital conservation buffer and the global systemically important institution buffer) account for EUR 796bn of Common Equity Tier 1 minimum required capital, or 73% before EU-specific adjustments. Non-prescriptive Basel elements calibrated in the EU add EUR 377bn (just over 30% after including EU-specific effects), led by Pillar 2 requirement and guidance (10% and 11% of total requirements) and macroprudential buffers (8%). Super-equivalences such as macroprudential risk-weight add-ons, the systemic risk buffer and the non-performing exposure backstop contribute around EUR 41.7bn (about 3%), while EU “deviations” including supporting factors, credit valuation adjustment exemptions, output floor transition arrangements and the Danish compromise reduce required capital by about 10% (EUR 123.4bn). The paper also documents rising capitalisation since the inception of the SSM, a pandemic-era buffer release followed by rebuilding via macroprudential buffers, and a muted aggregate near-term impact from CRR III, with the fully phased-in output floor expected to have a limited average effect through 2030 but potentially larger effects once transitional measures expire in 2033. A model-based counterfactual applying end-2025 US prudential rules to EU significant institutions suggests a modest increase in average minimum required capital (+4.7%), driven by stricter treatment for the largest internationally active banks (including higher G-SIB buffers and a binding Collins floor), while mid-sized banks would face less stringent requirements mainly due to the absence of EU-style O-SII buffers and the US practice of setting the countercyclical buffer at zero. The paper notes that US federal agencies proposed Basel III-related capital rule changes in March 2026, with consultation open until June 2026, and that these proposals are expected to slightly reduce requirements for the largest US banks.
European Central Bank 2026-04-26
European Central Bank paper assesses EU bank capital framework and challenges claims of systematic Basel gold-plating
The European Central Bank’s Occasional Paper finds that most bank capital requirements under the Single Supervisory Mechanism stem from Basel standards, with EU “super-equivalent” add-ons limited and overall requirements broadly aligned with other major jurisdictions. For 113 significant institutions, prescriptive Basel elements account for 73% of Common Equity Tier 1 minimum capital before EU-specific adjustments, while EU deviations reduce required capital by about 10%. The fully phased-in CRR III output floor is expected to have limited average impact through 2030. A counterfactual applying end-2025 U.S. prudential rules indicates a 4.7% increase in average minimum required capital for EU significant institutions.