For a more in-depth discussion of these topics, download the comprehensive guide at the bottom of the article.
Who this applies to: Professionals responsible for credit/risk, accounting, loan operations, and the C-suite at financial institutions.
Financial institutions have devoted significant time and resources to implementing the Current Expected Credit Losses (CECL) methodology. As CECL becomes part of the recurring financial reporting process, attention has shifted from implementation to ongoing governance, monitoring, and independent review. This article briefly summarizes our full guide on the differences between CECL model validation and CECL internal audit.
What is a CECL model validation?
A CECL model validation is an independent assessment of the methodology and model used to estimate expected credit losses. Its principal objective is to determine whether the model is appropriate for its intended use, supported by sound reasoning, implemented correctly, and producing reasonable and reliable results. For a CECL estimate, validation may address conceptual soundness, model implementation and technical accuracy, and ongoing model performance.
What is a CECL internal audit?
A CECL internal audit evaluates the broader governance, risk management, compliance, and control framework surrounding the allowance estimate. While model validation asks whether the model is sound, internal audit asks whether the institution has an effective process for operating, reviewing, approving, and reporting the estimate. The review may include governance, data and reconciliation controls, access rights, management review controls, reporting, documentation, and remediation.
The most important difference: The questions being answered
The clearest way to distinguish between the two reviews is this: The model validator evaluates the substance of the estimate, while the internal auditor evaluates the process and controls by which the estimate is developed and reported.
Areas of overlap
Model validation and internal audit are distinct, but they are not completely separate. Both may review areas such as data quality and reconciliation, documentation, oversight, model changes, third-party service providers, model monitoring, findings and corrective actions, and policies and procedures. However, the two functions examine these areas through different lenses.
Why one review does not automatically replace the other
Relying only on model validation may leave governance and control risks unaddressed, while relying only on internal audit may miss flaws in the methodology, assumptions, calculations, or model performance. A sound oversight framework considers both model risk and control risk.
A practical illustration
Consider a community bank that applies a qualitative adjustment for worsening economic conditions. A model validation may identify that the adjustment is based on an economic indicator with little demonstrated relationship to the bank’s historical credit losses or creates a risk of double-counting. An internal audit may find that the allowance committee did not review and approve the adjustment as required. The example illustrates how a technically sound model can still have a deficient process, or a well-controlled process can still rely on an unsound model.
Independence and qualifications matter
Both CECL model validation and CECL internal audit should provide objective challenge to the CECL process. Reviewers should be independent from developing, operating, and approving the model, and they should have the appropriate expertise for the review. Institutions may use outside specialists when the necessary expertise or independence is unavailable internally, but management remains responsible for understanding the scope, reviewing the results, and addressing identified issues.
How frequently should each review occur?
Review frequency should be risk-based and reflect the institution’s size, complexity, portfolio composition, methodology, model risk, and prior findings. More frequent or extensive validation may be needed after significant model changes, data-quality issues, recurring findings, portfolio changes, or increased use of management judgment. Internal audit frequency should also reflect risk, and the validation cycle and audit plan should be coordinated to avoid duplication while addressing both model risk and control risk.
Questions management and directors should ask
Management, directors, and audit committee members should evaluate the institution’s CECL oversight framework by asking the right questions across three main areas: model validation, internal audit, and coordination between the two functions. Together, these categories help assess whether model risk and control risk are being addressed without unnecessary duplication.
Download the full guide to CECL model validation and internal audit: Understanding key differences
About the team
For institutions looking for the best value, with the right understanding of scope and combination of skills and expertise, BerryDunn’s dedicated financial services professionals can customize an approach to cover both. Learn more about our services or reach out to us through our Ask the Advisor form. For more insights and expertise, follow and connect with Susan Weber and David Stone on LinkedIn.