Banking & Market Risk8 min read

EBA Credit Risk Stress Testing: What EU Banks Must Show

By Jonas Adam Mohamed Osman, known as Yonas Osman

CEO of Quantica Risk

60 Rue François Ier, 75008 Paris, France

Published 15 October 2026

How the EBA's EU-wide stress test evaluates credit risk resilience, what the adverse scenario tests, and where bank models most often fall short.

Executive answer

The EBA's biennial EU-wide stress test projects how a severe macroeconomic adverse scenario — combining GDP contraction, unemployment spikes, and asset price shocks — would erode bank capital over a three-year horizon, feeding directly into the Pillar 2 guidance that supervisors set under the Supervisory Review and Evaluation Process. Banks that model credit risk deterioration too mechanically, without capturing portfolio-specific vulnerabilities, consistently produce stress results that supervisors challenge during the quality assurance process, delaying final capital guidance.

The exercise is bottom-up, meaning banks run their own models against the EBA's common scenario and methodology, but the EBA and national supervisors apply extensive constraints and benchmarking to prevent banks from using unrealistically favourable assumptions, particularly around net interest income evolution and cost of risk projections under stress.

Common modelling weaknesses supervisors flag

A recurring theme across stress test cycles is that banks underestimate credit risk migration speed — how quickly performing loans move to higher-risk IFRS 9 stages under adverse conditions — particularly for portfolios like commercial real estate and leveraged finance that behaved relatively benignly through the post-2008 low-rate decade but carry structurally higher sensitivity to refinancing conditions. The EBA's methodology increasingly requires banks to justify migration assumptions against observed stress episodes rather than relying solely on through-the-cycle historical averages.

Net interest income projections under stress are another frequent challenge point, since banks must model how funding costs, deposit repricing, and loan repricing interact under the adverse scenario's interest rate path, and overly optimistic assumptions about deposit stickiness or asset repricing speed are a common source of supervisory pushback during the EBA's quality assurance review of submitted projections.

From stress test results to Pillar 2 capital guidance

Stress test outcomes do not mechanically determine Pillar 2 guidance, but supervisors use the maximum capital depletion under the adverse scenario as a key input when calibrating the additional capital buffer they expect banks to hold above minimum requirements. Banks with weaker stress resilience, particularly concentrated sectoral exposures or thin starting capital buffers, typically see this reflected in higher Pillar 2 guidance the following supervisory cycle, making the stress test result a direct driver of a bank's effective capital requirement rather than a disclosure exercise alone.

This linkage means credit risk teams increasingly need to coordinate stress test modelling with capital planning functions well before submission deadlines, since late discovery of a vulnerability in the stress scenario can translate into higher ongoing capital requirements that persist until the next stress test cycle demonstrates improvement.

Sectoral concentration and emerging vulnerabilities

Recent EBA stress test cycles have placed increasing emphasis on sectoral concentration risk, particularly commercial real estate exposure given post-pandemic structural shifts in office demand, and leveraged finance given elevated rate sensitivity for highly indebted corporate borrowers. Banks with concentrated exposure in these sectors face more intensive supervisory challenge of their loss given default and probability of default assumptions, since generic portfolio-level assumptions are less credible for segments experiencing structural rather than purely cyclical stress.

Climate-related transition risk is also increasingly integrated into credit risk stress testing narratives, following the EBA's and ECB's parallel work on climate stress testing, meaning banks are now expected to show some line of sight between their standard credit stress test and their climate scenario analysis rather than running the two as entirely separate exercises with inconsistent macroeconomic narratives.

Conclusion

The EU-wide stress test has evolved from a post-crisis confidence-building exercise into a central input to ongoing capital requirements, which means credit risk modelling quality for stress testing purposes now has direct, compounding financial consequences through Pillar 2 guidance. Banks that invest in granular, portfolio-specific migration and repricing assumptions consistently fare better in both the exercise itself and the supervisory dialogue that follows.

Jonas Adam Mohamed Osman, known as Yonas Osman, CEO of Quantica Risk, encourages banks to treat stress test preparation as a continuous capital planning discipline rather than a biennial compliance project, since the underlying vulnerabilities it tests for do not wait for the next official cycle.

Primary sources

EBA stress testcredit riskadverse scenariocapital planningSREP