Fair-trade certification aims to promote ethical sourcing, equitable pricing, labor protection, and sustainability across global supply chains. As consumer awareness grows, fair-trade labels have shifted from niche markets to mainstream retail networks in Europe, North America, Africa, and Asia. However, the economic, social, and cultural impact of certification varies across regions due to differences in income levels, cultural values, regulatory environments, and retail penetration. This paper develops a comparative framework—the Cross-Market Fair-Trade Impact Model (CM-FTIM)—to understand how fair-trade certification influences producer welfare, market access, consumer purchasing behavior, brand positioning, and policy interventions. Case studies include India’s tea sector, Ghanaian cocoa, Latin American coffee cooperatives, and European retail adoption patterns. The study concludes that fair-trade contributes positively to producer welfare and ethical branding, but challenges persist related to pricing premiums, certification costs, and inconsistent global demand.