7.8% growth- but is the GDP math adding up? Congress questions ₹43 lakh crore revision

New Delhi: India’s economy grew 7.8 per cent in the April-June quarter of 2026, beating expectations and signalling resilience despite global economic uncertainty linked to the war in Iran.

But the strong growth figure has triggered questions from the Congress, which has alleged that revisions to earlier GDP estimates and changes in the methodology have made the latest growth rate appear stronger than it actually is.

Congress general secretary Jairam Ramesh has asked the government to explain the revisions, particularly an alleged cumulative reduction of Rs 43 lakh crore in the estimated size of the economy over the past four years.

Here is what the controversy is about.

What is the latest GDP figure?

India's real GDP grew 7.8 per cent in the April-June 2026 quarter compared with the corresponding period a year earlier.

The figure has been presented by the government as evidence that the Indian economy continues to grow strongly despite external challenges and global uncertainty.

However, Ramesh has questioned how the figure was calculated and whether revisions to previous years' GDP estimates have affected the headline growth rate.

Why is the previous year's GDP important?

To calculate economic growth, the GDP of one period is compared with that of the corresponding period a year earlier.

Ramesh's argument centres on the GDP figure used as the base for comparison.

He said the GDP estimate for April-June 2025 had been revised four times, falling from around Rs 86 lakh crore to about Rs 80 lakh crore.

According to Ramesh, reducing the previous year's base makes the current year's growth rate appear higher.

The Congress leader cited calculations by former Finance Secretary Subhash Chandra Garg, who argued that without the downward revision to the base, nominal GDP growth in the latest quarter would have been closer to 2.6 per cent rather than the 10.3 per cent cited by the government.

Ramesh further claimed that adjusting for inflation would leave real growth close to zero.

These are political and analytical claims disputed by the government and need to be assessed against the official GDP methodology and data.

What is the Rs 43 lakh crore issue?

Congress has also raised questions about revisions made to GDP estimates for the previous four financial years.

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Ramesh said the new GDP series had reduced nominal GDP estimates for almost every year and quarter since 2022-23, with the reductions amounting to around Rs 8-12 lakh crore in individual years.

According to his calculation, the cumulative downward revision amounts to about Rs 43 lakh crore.

The Congress has asked the government to explain why the estimated size of the economy has been reduced by such a large amount and how the new methodology resulted in the change.

Ramesh argued that the scale of the revision warrants a detailed explanation of the underlying calculations.

What has changed in the GDP methodology?

GDP estimates are periodically revised as governments update their methodology, data sources, base years and methods of measuring economic activity.

Congress, however, has questioned which specific components of the new methodology produced the substantial changes in India's GDP estimates.

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Ramesh has asked the government to disclose the process followed while developing the new methodology, including who was consulted and the basis on which different components were adopted.

He has also questioned the method used to adjust for inflation when calculating real GDP.

What is the deflator controversy?

Another major issue raised by Ramesh concerns the GDP deflator, which is used to convert nominal GDP into real GDP by accounting for price changes.

Ramesh said the gap between the government's deflator and broader real-world inflation measures is normally around 1 to 1.3 percentage points.

He claimed that the gap has widened to 3.4 percentage points this time, which he described as potentially the largest such difference on record.

According to the Congress leader, using a deflator more closely aligned with inflation experienced by consumers would result in a significantly lower real GDP growth rate — potentially around 4-6 per cent or lower.

His argument is that official GDP figures showing relatively low inflation appear difficult to reconcile with the rise in household expenses.

Why are manufacturing and consumption being questioned?

Ramesh also pointed to manufacturing and private consumption as areas where he believes the latest GDP figures require closer scrutiny.

Citing Garg's calculations, he claimed that manufacturing gross value added (GVA) had contracted 5.2 per cent year-on-year, while private consumption had declined 5.4 per cent.

He said independent economic indicators supported these concerns.

These calculations, however, are not the same as the headline official GDP estimate and should be distinguished from the government's published data.

Has India's GDP data faced questions before?

The Congress has also referred to earlier debates over India's GDP methodology.

Ramesh cited former chief economic adviser Arvind Subramanian, who had previously argued that India's economic growth may have been underestimated during the 2005-2011 period but overestimated after the methodology and base year were changed in 2011-12.

Questions over India's GDP data are therefore not entirely new.

Economists have periodically debated the reliability of India's growth estimates, particularly when methodology, base years and data sources are changed.

What are the four questions Congress has asked?

Ramesh has asked the government to provide answers to four broad questions:

1. Why were GDP estimates revised down so substantially for all four years?

Congress wants an explanation for the aggregate reduction of around Rs 43 lakh crore in the estimated size of the economy.

2. What parts of the new methodology caused the revisions?

The party has sought a detailed account of the methodology and the components responsible for the change.

3. How was the new methodology developed?

Ramesh has asked who was consulted, what evidence was considered and why particular components and methods were adopted.

4. Why was this particular deflator method used?

Congress has questioned whether the method used to adjust for inflation accurately reflects the price pressures experienced by households.

What does this mean for the 7.8 per cent growth figure?

At the heart of the controversy is a basic question: does the 7.8 per cent figure accurately reflect the underlying strength of India's economy?

The government has presented the figure as evidence of robust growth. Congress, meanwhile, argues that changes to the base year, previous GDP estimates and the inflation adjustment method may have inflated the headline number.

The disagreement therefore goes beyond one quarterly GDP figure. It is about how India's economic output is measured, how previous estimates are revised and how inflation is accounted for when calculating real growth.

The government's methodology and detailed explanations will be important in assessing the competing claims.

For now, the 7.8 per cent figure remains the official growth estimate for the April-June 2026 quarter, while Congress is demanding greater transparency over how that number and the revised figures for previous years were arrived at.