Techno-economic analysis (TEA) is a vital component in evaluating the viability of e-fuels, providing insights into their economic feasibility, cost-effectiveness, and environmental impacts. This section systematically reviews various TEA assessments for e-fuels, exploring innovative production pathways, cost reduction strategies, and sustainability metrics. By examining methods such as catalytic deoxygenation, hydrothermal gasification, direct air capture, and power-to-liquid processes, this review highlights the economic and environmental potentials of e-fuels. The findings aim to inform policy decisions, guide industry practices, and identify areas for further research in the development of sustainable fuel alternatives.