This comprehensive study examines the intricate relationship between cost structure and profitability at Tanfac Industries Limited, a leading chemical manufacturing company headquartered in Chennai, India. The research employs detailed financial analysis, cost accounting methodologies, and quantitative assessment techniques to understand how various cost components influence overall organizational profitability. By analyzing five years of financial data (2019-2024), this research identifies cost drivers, evaluates efficiency patterns, and assesses the impact of fixed costs, variable costs, and semi-variable costs on profit margins. The study reveals that Tanfac Industries experiences significant cost pressures from raw material expenses, accounting for 42% of total costs, followed by labor costs at 18% and manufacturing overhead at 22%. Strategic cost optimization through process improvements, supply chain rationalization, and operational efficiency enhancements can potentially increase profit margins by 3-5 percentage points. The research demonstrates that semi-variable costs represent untapped optimization opportunities, as improvements in facility utilization and capacity management could yield substantial profitability gains. The findings provide management with concrete recommendations