Enzymes are crucial in biofuel production, particularly for bioethanol and biodiesel. They catalyse reactions under mild conditions, offering eco-friendly and energy-efficient alternatives to chemical processes. Derived from renewable biomass like agricultural residues and forestry waste, enzymes such as cellulases and lipases support waste valorization and reduce reliance on primary resources. Advances in biotechnology, including fermentation and genetic engineering, enhance enzyme yield while minimizing environmental impacts. In bioethanol production, enzymes like cellulases convert lignocellulosic biomass into fermentable sugars, while lipases catalyze biodiesel synthesis by transforming oils into fatty acid methyl esters. Enzymatic processes operate at lower pressures and temperatures, saving energy and reducing greenhouse gas emissions compared to fossil fuels. Residues like lignin can be repurposed into materials, chemicals, or energy, aligning with zero-waste principles. However, high enzyme production costs hinder adoption. Innovations in synthetic biology, fermentation technology, and integrated biorefineries are critical for cost reduction and efficiency. Policies supporting biofuels and biotechnology research can further drive progress. Adopting enzyme-based biofuel production within a circular bioeconomy promotes waste utilization, efficient resource use, and a sustainable energy future.