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Effect of Insurance Customer Concentration on Portfolio Risk

Abstract

Insurance customer concentration refers to the extent to which an insurer’s portfolio is dominated by a relatively small number of customers, policyholders, or customer segments. High customer concentration may expose insurers to greater portfolio risk because the financial performance of the business can become more dependent on a limited group of policyholders. Understanding the relationship between customer concentration and portfolio risk is therefore important for effective insurance portfolio management, risk diversification, and financial stability. The study examines the effect of insurance customer concentration on portfolio risk. It will assess how the distribution of policyholders across different customer groups influences the level of risk within an insurance portfolio. The study will also examine whether portfolios with higher levels of customer concentration experience greater variations in premium income, claims exposure, and overall risk compared with more diversified portfolios. The study will consider factors such as customer concentration levels, policyholder distribution, premium contribution by customer groups, claims exposure, customer retention, and portfolio risk measures. Statistical and actuarial techniques such as concentration ratios, descriptive statistics, correlation analysis, regression analysis, and portfolio risk measures will be applied. These techniques will provide a basis for measuring the degree of customer concentration and examining its relationship with insurance portfolio risk. A quantitative research approach will be adopted for the study. Historical insurance portfolio data containing information on policyholders, premium contributions, claims experience, customer categories, and portfolio characteristics will be analysed over a specified period. Concentration measures will be calculated to assess the distribution of customers, while statistical techniques will be used to determine the extent to which customer concentration influences portfolio risk. The study is expected to reveal that higher levels of customer concentration may be associated with increased portfolio risk. A portfolio that depends heavily on a limited number of customers may be more vulnerable to significant changes in premium income or claims exposure when major customers leave, reduce their coverage, or experience substantial claims. More diversified customer portfolios are expected to demonstrate relatively greater stability and reduced exposure to customer-specific fluctuations. The findings are expected to be useful to insurance companies, actuaries, underwriters, risk managers, and portfolio analysts. Understanding the effect of customer concentration on portfolio risk may assist insurers in developing effective diversification strategies, monitoring customer exposure, improving underwriting decisions, and maintaining balanced portfolios. It may also support better assessment of concentration-related risks when setting portfolio management and risk tolerance policies. The study concludes that insurance customer concentration is an important factor that should be considered in the assessment and management of portfolio risk. It is therefore recommended that insurers regularly monitor customer concentration levels and avoid excessive dependence on a limited number of policyholders or customer groups. Appropriate portfolio diversification and continuous concentration analysis may strengthen risk management, improve portfolio stability, and support sustainable insurance operations.

Keywords: Insurance Customer Concentration, Portfolio Risk, Customer Concentration, Insurance Portfolio, Risk Diversification, Policyholders, Premium Income, Claims Exposure, Portfolio Management, Concentration Risk, Insurance Risk, Customer Distribution, Risk Assessment, Actuarial Analysis, Insurance Stability.