Knowledge of economic competence of developed technologies can only be supplemented with honest and genuine technoeconomic analysis. This chapter examines the technoeconomic studies performed with vegetable oil, algal oil, and single cell oil and reveals the technological aspects that affect the economy of the process of biodiesel production. After all the analysis and technoeconomic studies, the part of the results that intrigue or interest a nonresearcher the most is economic feasibility. In fact, people have long been indirectly trying to answer questions about whether a proposed process is economically feasible. Policy makers and industry in real life understand different languages; they look at processes using different visions, but they all stress profits and revenues. This chapter elaborates how people summarize the whole field of technoeconomic study using different parameters of economic feasibility and evaluates which variant of the process is economically better.