There are three methods by which national income can be calculated. These methods include output approach(which is also known as production methods), the income approach and the expenditure approach. In the output approach, the total output is calculated which is equivalent to the value of the goods and services used in the production process. The formula of production method is as follows:
GDP at market price = Value of Output in an economy in a particular year - Intermediate consumption
NNP at factor cost = GDP at market price - Depreciation + NFIA (Net Factor Income from Abroad) - Net Indirect Taxes
GDP at market price = Value of Output in an economy in a particular year - Intermediate consumption
NNP at factor cost = GDP at market price - Depreciation + NFIA (Net Factor Income from Abroad) - Net Indirect Taxes