The value of the goods or commodities depends on the worker's performance, according to the labor theory of value. Therefore, every worker must have a clear calculation of receiving wages. But how to determine the right calculation for the wages of a worker? In this case, Islam, capitalism and socialism have their respective views. So, this study aims to determine the views of the three schools about the labor theory of value. The method used by researcher in conducting this research is to use the method of literature study and comparative analysis. And to compare the thoughts of the three schools of economics, the researcher refers to the figure of the school's experts as representatives. Researcher chose Ibn Khaldun from the Islamic side, Adam Smith as a representative of capitalism, and Karl Marx as a reference figure for socialism.