Barclays' interest rates team has evaluated the potential consequences of a proposed rise in the European Central Bank's minimum reserve requirement and concluded the impact on bank profitability would likely be modest, assuming the change were enacted.
According to a report dated June 30 that cited six sources, the ECB is examining the possibility of increasing the minimum reserve requirement to 2% from the current 1% for a defined set of liabilities. Barclays notes that these conversations are preliminary and that a formal decision is not anticipated until autumn, prior to any discussion within the Governing Council.
The minimum reserve requirement would apply to a specific set of liabilities. Those include overnight deposits, deposits with agreed maturity or notice periods up to two years, debt securities issued with maturities up to two years, and money market paper.
Barclays frames the discussions as part of the ECB's routine review of its operational framework for implementing monetary policy. The bank's analysts expect the Governing Council will likely opt to keep the minimum reserve requirement unchanged - mirroring the conclusion reached in 2024 - citing concerns that raising the required reserves could unintentionally tighten monetary conditions more broadly.
Quantitatively, Barclays produced a sensitivity exercise that models a shift from a 1% reserve ratio to 2%. Using the latest available minimum reserve figures reported by banks, the team estimates the average effect would be about a 1.0% reduction in banks' 2027 estimated earnings per share and around a 0.7% reduction in 2027 estimated net interest income. The analysts explicitly state this calculation does not incorporate any possible offsetting measures banks might take.
Context and implications
- These estimates reflect Barclays' view that, while a change would not be negligible, it would be contained relative to banks' overall earnings profiles.
- Because the discussions remain early-stage, the outcome is uncertain and a decision may not be taken before the autumn review process completes.
Barclays' analysis underscores the firm belief that the ECB may refrain from raising the minimum reserve requirement to avoid potential unintended impacts on monetary policy transmission. The firm also highlights the limitations of its sensitivity calculation, namely that it is based on last reported reserve figures and omits potential mitigating adjustments by banks.