<p>This study explores the intricate relationships among business ethics, organizational policy, and strategic planning performance within Turkey’s manufacturing and service industries. The research specifically aims to (i) assess the impact of organizational policies on strategic planning performance, (ii) evaluate how business ethics shapes organizational policies and strategic outcomes, and (iii) examine the moderating role of business ethics in the relationship between organizational policy and strategic planning performance. A quantitative methodology was employed, surveying 732 managers and employees using a 21-item questionnaire with 5-point Likert scales. Data analysis included exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) to validate constructs, and the Hayes PROCESS macro to evaluate moderation effects. The study provides three precise findings: first, organizational policy has a significant positive relationship with both business ethics and strategic planning performance. Second, business ethics strongly enhances strategic planning performance. Third, business ethics moderates the relationship between organizational policy and strategic planning performance, amplifying their positive interaction. This research contributes to the literature by providing empirical evidence of business ethics’ moderating role, offering a comprehensive analysis within an emerging market context, and proposing an integrated framework for the interaction of these three dimensions. The findings underscore the importance of integrating ethical considerations into organizational policies to achieve enhanced strategic outcomes. These insights provide practical guidance for managers seeking to foster ethical cultures and improve organizational performance in competitive markets.</p>