Context: NITI Aayog CEO B.V.R. Subrahmanyam recently claimed that India has overtaken Japan to become the world’s fourth-largest economy, sparking debate as others questioned the accuracy of this data.
Relevance of the topic:
Prelims: Key facts about GDP Calculation methodologies.
Mains: Limitations of using nominal GDP as a measure of economic development.
India’s rise in the nominal GDP- IMF data:
As per the new estimates of the Gross Domestic Product (GDP) of various countries for 2024 by the International Monetary Fund (IMF):
- India’s GDP in 2025 is likely to be $4,187 billion ($4.18 trillion), marginally higher than the GDP of Japan at $4,186 billion.
- This makes India the fourth largest economy of the world in 2025 after the U.S., China and Germany. It is estimated that India could grow to be the third largest economy of the world in 2028.
India’s actual position in the global economic order can be understood by distinguishing between nominal GDP and Purchasing Power Parity (PPP).
Nominal GDP
- Nominal GDP is the total value of goods and services produced in a country, measured at current market prices in US dollars. It does not adjust for inflation or differences in cost of living in different countries.
Nominal GDP is not always the right metric because of:
- Exchange Rate Distortions: Recent claims that India has overtaken Japan are based on nominal GDP data, which is vulnerable to short-term currency movements. Changes in exchange rates can artificially inflate or deflate a country’s GDP without any real change in economic output. E.g., a weaker rupee can make India’s GDP appear smaller in dollar terms even if domestic production increases. This makes it an unreliable metric for comparing economies across countries.
- Ignores differences in Cost of Living: Nominal GDP does not reflect how much people can actually buy with their incomes. E.g., $1 buys a lot more in India than in the U.S. or Japan due to lower costs of goods and services.
- Overlooks Per capita disparities: A higher nominal GDP does not mean higher income per person. E.g., In 2025, India ranks 4th and the UK ranks 6th in nominal GDP. Yet, India's per capita income is just $2,879, while the UK's is $54,949.

Nominal GDP comparisons are not as meaningful because they miss out on the purchasing power aspect. It is for this reason that the IMF also calculates GDP based on Purchasing Power Parity.
Purchasing Power Parity (PPP)
- GDP at PPP compares the relative value of currencies by measuring what the same amount of money can buy in different countries. E.g., A person working in Delhi may earn less than a friend working in Paris, but the Delhi resident can afford many services- like cooking, cleaning, or dental care- at much cheaper rates.
PPP offers more accurate picture of economy as:
- Unlike nominal GDP, PPP is not affected by changes in exchange rates, giving a more stable and fair comparison over time.
- PPP adjusts for differences in cost of living and inflation between countries, providing a more accurate picture of real purchasing power.
- PPP better reflects the true economic well-being of people, as it compares income based on local prices, not just dollar values.
IMF data shows that India became the third-largest economy by PPP as early as 2009, overtaking Japan.

Challenges:
- In GDP in PPP terms, even though India has improved over the years, its rank or relative position has not changed.
- In terms of per capita GDP based on PPP, India languishes far below the world average. In terms of market exchange rates, India’s rank in per capita GDP in 2024 was 144th among 196 countries. Even in terms of PPP international dollars, India’s rank in per capita GDP in 2024 was 127th among 196 countries.
A much better way to assess India’s relative development may be to compare the set of indicators beyond GDP (like HDI Index, State of Multidimensional Poverty, Hunger Index, Gender Inequality Index etc.) to get a meaningful measure of economic performance and social progress.
India’s global economic standing is undoubtedly rising, but rankings based on nominal GDP alone provide an incomplete picture. True development lies in raising per capita incomes, reducing inequality, and enhancing human development indicators.





