Why Was a New GDP Series Introduced?

India has shifted to 2022-23 as the base year for its new GDP series, replacing the earlier 2011-12 base.

The revised framework incorporates newer and broader datasets as well as updated price indicators. The objective is to improve the measurement of real economic activity and better capture structural changes across different sectors.

Why Did Manufacturing Show a Negative Deflator?

Manufacturing recorded an implicit GVA deflator of -1.5% in the first quarter of 2026-27.

The government clarified that this does not mean prices of manufactured goods necessarily declined. Under the double-deflation approach, output and intermediate consumption are adjusted separately using relevant price measures.

If input prices rise faster than output prices, nominal GVA growth can be lower than real GVA growth, resulting in a negative implicit deflator.

Manufacturing Real GVA Grew 9.2%

According to the government’s clarification, manufacturing nominal GVA grew by 7.7% in the first quarter of 2026-27.

Real GVA, meanwhile, increased by 9.2%. The difference is largely linked to the way price changes are incorporated into the calculation.

Why Was Last Year’s GDP Estimate Revised?

The GDP estimate for the first quarter of 2025-26 also changed significantly under the new series.

Under the old series, GDP for the quarter was estimated at Rs 86.05 lakh crore. With the new 2022-23 base-year series, the figure came down to Rs 80.32 lakh crore.

After additional data, including updated IIP and PPI information, became available, the estimate was revised further to around Rs 80 lakh crore.

The government stressed that the revision was not deliberately made to increase the current year’s growth rate.

Why Is the GDP Deflator Different From CPI and WPI?

The GDP deflator cannot be directly compared with CPI or WPI because the three measures capture different parts of the economy.

CPI reflects prices paid by consumers, while WPI tracks wholesale prices of goods. The GDP deflator covers a much broader basket, including goods and services produced across the economy, government spending, investment and exports.

As a result, the GDP deflator does not necessarily move in the same direction or at the same pace as CPI and WPI.

Mining Shows a Sharp Nominal-Real Gap

The mining sector has recorded a particularly large difference between nominal and real GVA.

In the first quarter of 2026-27, real GVA in mining declined by 2.4%, while nominal GVA jumped 22.3%.

The government attributed much of the difference to a sharp rise in prices of crude petroleum and natural gas.

GDP Estimates Can Still Be Revised

The government has also emphasised that GDP estimates evolve as more comprehensive data becomes available.

National accounts estimates are routinely revised as updated information is incorporated. Some of the apparent statistical differences visible today could therefore change in subsequent revisions.

The Centre also cautioned against assuming at this stage that GDP will necessarily be revised either upward or downward.

Impact of Updated PPI and IIP

The new GDP calculations incorporate updated series of the Producer Price Index and Index of Industrial Production.

The government has said that PPI provides a more appropriate measure of producer prices for relevant components because it captures prices received by domestic producers more directly.

Does This Mean Earlier GDP Estimates Were Wrong?

The government has rejected that interpretation.

Earlier GDP estimates were prepared using the best available data and price indicators at the time. National accounts are routinely updated when better and more comprehensive information becomes available.

Therefore, revisions under the new series should be viewed as improved estimates based on updated inputs rather than evidence that earlier estimates were simply incorrect.

Conclusion

The Centre’s latest clarification provides important context for understanding India’s revised GDP series and the statistical differences that have attracted attention.

The government has explained that the negative manufacturing deflator does not automatically indicate falling product prices, while revisions to earlier GDP estimates were driven by updated data rather than an attempt to manipulate growth rates. The sharp nominal-real gap in mining was largely attributed to higher crude petroleum and natural gas prices.

As more data becomes available, further revisions to GDP estimates remain possible.