The European Central Bank imposed administrative penalties totalling €1.24 million on the three Baltic subsidiaries of Swedish banking group SEB, following a finding that the institutions had failed to maintain adequate margins of conservatism in their internal ratings-based credit risk models for corporate exposures. The ECB's decision was dated 27 March 2025 and announced publicly on 18 April 2025, with separate penalties applied to each of the three entities in Estonia, Latvia, and Lithuania.
AS SEB Pank, the Estonian subsidiary, received a penalty of €410,000. AS SEB banka in Latvia was fined €340,000, while AB SEB bankas in Lithuania received the largest individual penalty of €490,000. The three sanctions reflect the ECB's assessment that each entity had independently failed to meet the supervisory requirements for the internal models they use to calculate risk-weighted assets for corporate credit exposures.
INTERNAL MODEL DEFICIENCIES DATED BACK TO 2023
The ECB classified the severity of the violations at level 2 on its five-grade scale, placing them in the lower-to-mid range of regulatory seriousness but still warranting formal financial penalties. The supervisory authority found that the margins of conservatism embedded in the SEB Baltic subsidiaries' IRB models for corporate exposures did not meet the requirements set out under the applicable framework, and that the deficiencies were not addressed within the required timeframe.
The capital impact of the model shortcomings had already been in place since 2023, meaning that the supervisory adjustment to the banks' capital calculations preceded the formal penalty decision by approximately two years. This suggests that the ECB identified the issue during the supervisory review process, required additional capital buffers to compensate for the model deficiency while remediation was under way, and subsequently issued the administrative fine to reflect the regulatory breach. SEB acknowledged the findings and confirmed that it had taken corrective measures to address the deficiencies.
IMPLICATIONS FOR IRB MODEL GOVERNANCE ACROSS THE SECTOR
Internal ratings-based models are central to the way large European banks calculate the capital they must hold against their credit exposures. Banks that use approved IRB models are permitted to use their own estimates of default probabilities and loss rates to derive risk weights, rather than applying the standardised risk weights prescribed by regulators. However, this flexibility comes with strict requirements around model quality, conservatism, and validation, and the ECB has been increasingly active in scrutinising the adequacy of these models across the institutions under its direct supervision.
The requirement to maintain appropriate margins of conservatism is specifically designed to guard against the risk that model estimates are overly optimistic, which would result in banks holding less capital than is prudent. Where a model is found to lack sufficient conservatism, supervisors typically require a capital add-on to compensate until the model is corrected. The SEB Baltic case illustrates the full cycle of this process: identification, capital adjustment, remediation, and ultimately a formal penalty for the period during which the breach persisted.
SEB Group has stated that its Baltic subsidiaries have taken corrective action and that the supervisory concerns have been addressed. The total €1.24 million penalty is modest relative to the group's overall capital base but the reputational and supervisory implications carry weight, particularly as the ECB continues to prioritise model risk governance as a key area of supervisory focus across the single supervisory mechanism.