India's 7.8 per cent GDP growth sparks debate over data revisions and methodology

India’s latest GDP figures face scrutiny amid claims of data manipulation and methodological shifts, with the government defending the integrity of the numbers amidst political and economic debates.

Since India published its first-quarter GDP figures for 2026-27 on 31 August, the argument has shifted from whether 7.8 per cent growth was a surprise to whether the number was made to look stronger by revisions to last year’s base. Moneycontrol reported (moneycontrol.com) that the statistics ministry answered the criticism with a detailed Q&A on double deflation, the low GDP deflator and the revised size of the economy, while India Today and Business Today said (indiatoday.in) Secretary Saurabh Garg took the same defence into television interviews, insisting the headline figure was backed by activity on the ground and not by “data jugglery”.

At the heart of the dispute is the fall in the comparable current-price GDP estimate for the April-June quarter of 2025-26. Under the old 2011-12 series, that quarter had been put at ₹86.05 lakh crore. Under the new 2022-23 base-year series, Moneycontrol said (moneycontrol.com) it was first recast to ₹80.32 lakh crore, then updated to ₹80.44 lakh crore when provisional 2025-26 GDP estimates were released on 5 June 2026, and later revised again to ₹80.00 lakh crore after the new IIP and producer price index series were folded in. The ministry’s case, also set out by The Times of India, is (timesofindia.indiatimes.com) that critics are comparing unlike with unlike: the ₹88.27 lakh crore estimate for the latest quarter should be set against the recast figure from the same series, not against a number from a superseded framework.

That chronology matters because it undercuts the simplest version of the manipulation charge. According to the ministry’s explanation carried by Moneycontrol, quarterly GDP is compiled through a benchmark-indicator approach, so a lower benchmark for the earlier year does not by itself manufacture stronger activity in the present one. (moneycontrol.com) The same Q&A was also the government’s fullest answer to the deflator controversy. It said the 2.5 per cent implied GDP inflation rate can sit alongside consumer inflation of 3.9 per cent and wholesale inflation above 9 per cent because the GDP deflator is an economy-wide, implied measure of net value added, not a shop-floor or retail price gauge. It covers government spending, investment, exports and services as well as goods, and it is derived from more than 300 item-level deflators. (moneycontrol.com) In manufacturing, where the new series uses double deflation, the ministry said output and inputs are deflated separately; with input prices rising faster than output prices, nominal manufacturing GVA grew 7.7 per cent while real GVA grew 9.2 per cent, producing an implicit deflator of minus 1.5 per cent. (moneycontrol.com) As Madan Sabnavis told The Times of India, a negative manufacturing deflator in that set-up means output prices rose more slowly than input prices, not that factory prices necessarily fell outright. (timesofindia.indiatimes.com)

Garg’s public rebuttal has rested heavily on corroborating indicators. India Today reported (indiatoday.in) that when asked whether the government was presenting a rosier picture by compromising GDP integrity, his answer was: “Not at all.” He said the 7.8 per cent number was consistent with manufacturing and services PMIs, electricity generation, cement and steel output, and consumption. India Today quoted him saying electricity growth was about 9 per cent, cement and steel were growing at roughly 8 per cent, several services segments including hotels, tourism and trade were up by around 15 to 20 per cent, electrical equipment rose 27 per cent and capital goods 12 per cent, while private consumption expenditure was close to 8 per cent. (indiatoday.in) Business Today separately reported (businesstoday.in) that Garg framed the argument as one about sectoral trends, methodology, revisions and the wider economic outlook, and said the methods had been discussed with international bodies and outside experts before the new series was introduced in February.

Some economists who support the ministry’s broad case have nevertheless used the row to explain how much changed with the new series. The Times of India quoted Soumya Kanti Ghosh of SBI calling the 2.6 per cent alternative calculation “completely unsolicited” and “a sure sign of intellectual dishonesty”. (timesofindia.indiatimes.com) Ghosh argued that if someone insists on restating the latest quarter’s nominal GDP against an earlier revised base, the comparison should be ₹88.3 lakh crore over ₹80.4 lakh crore, implying 9.7 per cent nominal growth rather than 10.3 per cent; on his arithmetic, even the resulting real growth would still be 7.4 per cent. (timesofindia.indiatimes.com) The same report said EY India’s DK Srivastava traced the gap to deeper changes than a base-year reset: altered sector weights, wider use of GST data, better scaling-up of informal-sector activity and firms outside the MCA database, and new consumption weights drawn from the 2022-23 Household Consumption Expenditure Survey. (timesofindia.indiatimes.com)

That has not stopped the issue becoming a political weapon. Mint reported (livemint.com) that Congress general secretary Jairam Ramesh accused the government of “chest-thumping” over the 7.8 per cent print and demanded an explanation for what he said was a cumulative ₹43 lakh crore reduction in the estimated size of the economy across four years. He argued that the April-June 2025 quarter had been revised four times, from about ₹86 lakh crore to about ₹80 lakh crore, and said that “if you keep shrinking the base you’re comparing against, this year’s number will automatically look much bigger than it really is”. (livemint.com) Mint said he also questioned a deflator he viewed as out of step with prices seen in the market and asked the government to spell out exactly which methodological changes had produced such a large downward recasting of nominal GDP. (livemint.com)

The most sensible reading of the episode may be narrower than either side would like. The ministry has made a substantive case that the loudest 2.6 per cent comparison mixes two different statistical series and that revisions were part of a longer rebasing and data-update process, not a one-off cut designed to flatter the present. Moneycontrol also noted (moneycontrol.com) that the Q1 estimates remain subject to revision as fuller production and expenditure data arrive, while the ministry says the current discrepancy between approaches should not be treated as proof that GDP is either overstated or understated. That does not settle every question about how easily the new numbers can be interpreted. But it does suggest that the live issue is less whether the national accounts were fabricated than whether analysts, politicians and markets have yet caught up with a methodology that is newer, more granular and plainly harder to read at first glance. (moneycontrol.com)