Adler and Dumas (1983) laid the foundation for pricing international assets under deviation from Relative Purchasing Power Parity (PPP). Only Lally (1996) regards the spectrum of international taxation but in his model - he disregards the tremendous impact of exchange gains taxation in International Capital Asset Pricing Theory (IntCAPT). This dissertation develops a theory of taxation in pricing international assets. The new result is that the integration of exchange gains taxation into the Tax - IntCAPM leads to an international pricing relationship composed of the risky asset's excess return and its world risk premium, which is adapted by exchange gains tax factors. The non-linear deterministic behavior of exchange rates and the determination of inflation by monetary policy lead to the integration of the market equilibrium exchange and inflation rate into the Tax - IntCAPM.