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The national income in terms of various sectors and the periodical variations in them. To make projections about the future development trend of the economy. To help government formulate suitable development plans and policies to increase growth rates. To help businesses to forecast future demand for their products.To make international comparison of people�s living standards.GDP refers to total income from goods and services produced in a country in a year.GDP is calculated bythree ways I) expenditure approach II) income approach III) value added approach.The following are eight macroeconomic variables to be discussed in this article. Gross Domestic Product (GDP), NDP at factor cost, GDP at market price, NDP at market price, GNP at factor costis, NNP at factor cost, GNP at market price and NNP at market price. These secondary data collected from the RBI Report from the Year 1989 � 90 to 2013-14. To develop the National Income the government politics should be easy for the people to understand. The government should remove all kinds of restriction for the entrepreneurs in there business initiation. To motivate entrepreneurs and engorge experts.