Evaluating the cost-benefit dynamics of cybersecurity compliance investments: A multi-sectoral analysis across financial, educational, and e-commerce industries

Following the assertion of recent studies (Balogun, 2025) establishing the foundational role of compliance investments in mitigating data privacy breaches within U.S. healthcare; while the study is limited to the cost-benefit dynamics of such investments across other critical industries, this study investigates cybersecurity compliance investments and outcomes across financial, educational, and e-commerce sectors using quantitative methods. Data were drawn from the SEC EDGAR database, IBM Cost of a Data Breach Report, and the Privacy Rights Clearinghouse. Descriptive statistics, multivariate regression, cost-benefit analysis, logistic regression, and k-means clustering were employed to assess expenditure patterns, outcome efficiency, and compliance maturity. Results reveal that while the financial sector had the highest average investment ($850M), its cost-benefit ratio (CBR = 0.00547) lagged behind the education sector (CBR = 0.02016), which achieved the highest efficiency despite minimal investment. Zero-trust adoption (? = -1.81) and MFA (? = -1.60) emerged as the strongest predictors of breach resilience. The study recommends regulatory transparency on cybersecurity ROI, targeted support for low-capacity institutions, a shift to resilience-based auditing, and mandatory architectural safeguards for e-commerce platforms to optimize compliance effectiveness across sectors. Keywords: Cybersecurity Compliance, Cost-Benefit Ratio, Breach Prediction, Sectoral Investment Efficiency, Regulatory Strategy.