The genesis of the informal sector in Mozambique is similar to the way it emerged in many other countries in the world, starting mainly with small businesses performed by unemployed people, peasent families, street vendors among others as their self employment. The informal sector offers a striking illustration of the strengths and weakness of enterprises in Mozambique. A simple and transparent legal framework, properly enforced is indispensable for the long term success of the informal sector to turn to formal sector. Taxation is controversary in the informal sector. The existing tax system in Mozambique is distorced and naturally contribute to a host of economic and social problems. The needed for the reform of taxation system has been acknowledged for instance the recent implementation of VAT system in Mozambique still on process of implementation. Taxes generated by the informal sector could contribute to the budget of the State. / Mercantile Law / LL.M.