Principle 5: Model Risk Mitigants – Safeguarding Financial Institutions in the United Kingdom in Alignment with SS1/23


In the rapidly evolving landscape of finance, models are invaluable tools used by banks to make informed decisions and manage risks effectively. However, with the increasing complexity and potential vulnerabilities associated with models, it is crucial for financial institutions to implement robust model risk management (MRM) practices. Principle 5 of the Bank of England’s Prudential Regulation Authority (PRA) Supervisory Statement (SS) 1/23 focuses on model risk mitigants. This blog post aims to provide an informative overview of Principle 5, its significance for banks in the United Kingdom and its dependencies, and the expectations placed on financial institutions to comply with this principle.

Understanding Model Risk Mitigants

Model risk mitigants are measures put in place to minimize the potential risks associated with the use of models in banks. These measures encompass various strategies, controls, and practices aimed at reducing model risk and enhancing the reliability of model outputs. Principle 5 emphasizes the importance of identifying and implementing effective mitigants to manage and control risks arising from the use of models.

Importance for Banks in the United Kingdom

Principle 5 holds significant importance for banks in the United Kingdom due to several key factors:

  1. Risk Management Enhancement: Model risk mitigants play a crucial role in enhancing risk management practices within banks. By implementing effective strategies to mitigate model risks, financial institutions can improve decision-making accuracy and reduce potential losses stemming from inaccurate or unreliable models.
  2. Regulatory Compliance: Compliance with the PRA’s expectations, including Principle 5, is essential for regulated UK-incorporated banks, building societies, and PRA-designated investment firms. Adhering to these principles demonstrates a commitment to robust risk management practices and regulatory compliance.
  3. Stakeholder Confidence: Effective model risk mitigants instill confidence in stakeholders, including regulators, investors, and customers. They provide assurance that banks are actively managing and controlling the risks associated with model usage, thereby safeguarding financial stability.

Expectations for Compliance

To comply with Principle 5 and establish effective model risk mitigants, financial institutions are expected to undertake the following actions:

  1. Risk Quantification: Banks should establish robust methods to quantify model risks. This includes assessing the potential impact of model errors or inaccuracies on decision-making processes, financial outcomes, and regulatory compliance.
  2. Stress Testing and Scenario Analysis: Conducting stress tests and scenario analyses helps banks assess the resilience of models under adverse conditions. These exercises simulate extreme scenarios to identify vulnerabilities and weaknesses in models and develop appropriate risk mitigation strategies.
  3. Model Validation Techniques: Banks must employ comprehensive validation techniques to assess the accuracy, reliability, and limitations of models. Techniques such as backtesting, sensitivity analysis, and benchmarking can help identify and address potential model risks.
  4. Governance and Controls: Effective governance and control mechanisms are crucial for managing model risks. Banks should establish strong control frameworks, including segregation of duties, documentation standards, and model change management processes.
  5. Model Documentation and Transparency: Comprehensive documentation of models, including their underlying assumptions, methodologies, and limitations, enhances transparency and aids in risk mitigation. Clear documentation facilitates effective communication, audits, and regulatory reviews.

Benefits and Challenges

Complying with Principle 5 offers several benefits to banks:

  1. Risk Mitigation: Effective model risk mitigants help reduce the likelihood and impact of model-related risks. By identifying and implementing appropriate measures, banks can enhance risk management practices and protect against potential losses.
  2. Decision-Making Accuracy: Implementing reliable model risk mitigants ensures more accurate and informed decision-making. By reducing model risk, banks can enhance the quality of outputs used in various business processes, including risk assessment, pricing, and strategic planning.
  3. Regulatory Compliance: Adherence to model risk mitigants enhances regulatory compliance and demonstrates a proactive approach to risk management. Complying with the PRA’s expectations strengthens the overall regulatory standing of banks.

However, challenges may arise in implementing model risk mitigants:

  1. Resource Allocation: Establishing and maintaining effective model risk mitigants requires dedicated resources, including skilled personnel, advanced technology, and ongoing training. Banks must allocate sufficient resources to support these initiatives effectively.
  2. Model Complexity: Banks dealing with complex models may face challenges in identifying and implementing appropriate mitigants. The identification and assessment of risks associated with intricate models require specialized expertise and advanced techniques.
  3. Rapid Technological Advances: The rapid advancement of technology, including artificial intelligence and machine learning, introduces new risks and challenges in model risk mitigation. Banks must stay updated with evolving technologies and adapt their mitigants accordingly.


Principle 5 of the Bank of England’s SS1/23 underscores the significance of implementing effective model risk mitigants for banks in the United Kingdom. Compliance with this principle enables financial institutions to enhance risk management practices, regulatory compliance, and stakeholder confidence. By identifying and implementing appropriate strategies and controls, banks can effectively manage and control the risks associated with model usage. While challenges may arise during implementation, the benefits of aligning with Principle 5 far outweigh the obstacles, ultimately safeguarding financial institutions and contributing to the stability of the banking sector.

How We Can Help

Model Risk Management on Connected Risk is a robust platform that allows you to manage and meet all of the obligations set within SS1/23 from the PRA. If you’re looking to meet regulatory requirements and obligations, our solution is the standard for your financial institution. Get started today using the form below, or learn more on our SS1/23 information page.

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