In India, the Central Statistics Office (CSO) has emphasized the measurement of national income through Gross Domestic Product (GDP) at factor cost, transitioning to Gross Value Added (GVA) at basic prices in January 2015. GVA reflects the total output produced in the economy after intermediate consumption. The narrative also clarifies the distinctions between factor costs, which include payments to production factors without taxes, basic prices that account for production taxes, and market prices that encompass both types of taxes. Thus, the calculation of GDP at market prices involves adjusting GVA at basic prices by adding net product taxes. Understanding these distinctions is crucial for grasping the broader economic metrics employed in the assessment of national income.