European Central Bank Banking Supervision has published an Occasional Paper assessing how the European Union’s bank capital framework implements Basel standards, quantifying the effect of EU-specific choices and comparing outcomes with a counterfactual application of current United States prudential rules. Using supervisory data for significant institutions under the Single Supervisory Mechanism, the authors conclude that EU capital requirements largely stem from Basel standards, that claims of systematic EU “gold-plating” are not supported in aggregate, and that for the largest EU banks current US rules would generally be stricter, while mid-sized EU banks would face less stringent requirements. The paper groups EU rules into prescriptive Basel elements, non-prescriptive Basel elements calibrated at EU level, “super-equivalences” and “deviations” that are less strict than Basel. In a 2030 scenario with the Basel III output floor fully phased in, prescriptive elements (Pillar 1 minimum requirements, the capital conservation buffer and the global systemically important institution buffer) account for the majority of required capital (EUR 796bn, around 73% before accounting for super-equivalences and deviations), while non-prescriptive Basel elements add EUR 377bn and make up just over 30% of total requirements once all effects are included. Super-equivalences have a limited average impact (EUR 41.7bn, around 3%), while deviations reduce required capital by about 10% (EUR 123.4bn), driven by pre-CRR III deviations such as the SME and infrastructure supporting factors and CVA exemptions (EUR 44.5bn), transitional output floor deviations (EUR 24.9bn) and the Danish compromise (EUR 54bn). The paper also traces capital and requirements since the inception of the SSM, noting marked increases in capital ratios, temporary buffer releases during the pandemic, and a return of aggregate requirements to around pre-pandemic levels as macroprudential buffers rose, while estimating that the fully phased-in output floor has a limited average impact through 2030 (+2.6% on minimum required capital, rising to +5.0% once transitional measures expire). A counterfactual exercise applying end-2025 US rules finds a modest increase in minimum required CET1 capital for the full sample (+4.7%), with higher requirements concentrated in the largest internationally active banks due to US buffer design and limits on internal model benefits, and lower requirements for smaller banks largely because the US framework has no equivalent of EU O-SII buffers and sets the countercyclical buffer at zero. Looking ahead, the paper highlights that transitional output floor deviations run until 2033 and that estimated impacts vary materially by bank. It also notes that US federal agencies proposed Basel III-related changes in March 2026, with a consultation running until June 2026, which the paper expects would slightly reduce requirements for the largest US banks and could narrow the relative gap with the EU once EU transitional measures expire.
European Central Bank - Banking Supervision 2026-04-27
European Central Bank Banking Supervision publishes study quantifying EU bank capital requirements and benchmarking them against US rules
The European Central Bank Banking Supervision has published an Occasional Paper finding that European Union bank capital requirements largely reflect Basel standards, with limited average impact from “super-equivalences,” a roughly 10% reduction from deviations, and no evidence of systematic EU “gold-plating.” The analysis projects a modest average impact from the fully phased-in Basel III output floor by 2030 and shows that, under a counterfactual application of current United States prudential rules, minimum Common Equity Tier 1 requirements would generally be higher for the largest EU banks and lower for mid-sized banks.