India’s factory output growth slowed to a four-month low of 6.7% in September, and the reason is a mix of a tough base effect and a steep fall in mining. The Index of Industrial Production, or IIP, is the monthly gauge of how much the country’s factories, mines and utilities are actually producing, and this print shows the engine losing some speed right before the busiest spending season of the year.

The September reading is the sixth monthly figure released under the revised 2022-23 base year series. It is also the weakest growth rate in four months. For a headline number that policymakers, investors and businesses watch closely, that is a sharp signal to pay attention to.

Manufacturing carries the most weight. It accounts for 76.1% of the index, and it grew 7.6% year-on-year in September. That is a slowdown from 8.6% in the previous month. Still, the sector is far from stalling. Of the 23 industry groups tracked, 17 registered positive growth during the month.

Mining is where the damage shows

The most alarming number in the report comes from mining and quarrying. The sector contracted 6.2% in September, compared with a decline of 4.6% in August. The drop was widest in non-metallic minerals, which pulled the category deeper into negative territory.

“Mining output contracted steeply in September led by the non-metallic minerals segment,” said Aditi Nayar, chief economist at ICRA.

Devendra Pant, chief economist at India Ratings and Research, put the effect in simple terms. A high base effect from last year and negative growth in mining together dragged down September’s overall figure. In other words, the drop was partly a matter of comparing against a strong period and partly a matter of the mines themselves producing less.

Power demand surges as the heat stays on

While mining sank, electricity and gas supply told a different story. Electricity and gas supply grew 11.2% year-on-year in September, down from 12.3% in August. Electricity generation alone rose 12.6%, and strong demand amid deficient rainfall helped drive that number higher.

There is a catch. Gas supply contracted 6.7% during the month. Electricity generated from non-renewable sources grew 16.5%, while renewable sources grew only 4.3%. Water supply, sewage and waste management also slowed, growing 5.8% compared with 6.3% in August.

The consumer is where the pain could land

This is the part of the report that matters most to ordinary households. Among the six use-based categories, only consumer non-durables recorded higher year-on-year growth in September compared with August. Even that gain was modest, with output rising 1.4% after contracting 1.1% in August.

Consumer durables, the big-ticket items people buy when they feel confident about their finances, slowed sharply. Growth fell to 6% in September from 10.5% in August. That is a notable cooling in the kind of spending that tends to signal how comfortable people feel about their money.

Capital goods and intermediate goods also moderated from the previous month. Both categories, however, continued to post double-digit expansion. That keeps the industrial picture from looking fragile, but it also shows that much of the strength is coming from businesses investing and supplying each other rather than from shoppers at the store.

Rainfall, crude and tightening raise the stakes

Pant warned that deficient rainfall, high crude prices and calibrated tightening are likely to affect consumer demand in the economy. Each of those pressures hits differently. Weak rain can push up food costs and hit rural incomes. High crude prices feed into transport and fuel bills. Tighter monetary conditions make borrowing more expensive for families and businesses alike.

Madan Sabnavis, chief economist at Bank of Baroda, offered a more hopeful view. He said the coming months, which include the festival and wedding seasons, should bring a lift in buoyancy, and that this could feed back into stronger demand. Whether that happens will depend on how quickly those pressures ease and how households respond when they open their wallets.

Growth outlook still looks strong on paper

Despite the monthly slowdown, the bigger picture for the quarter looks better than the headline suggests. Industrial production growth rose to 7.3% in the July-September quarter, known as Q2FY27, up from 6.2% in the April-June quarter, Q1. Growth stood at 7.8% in the June quarter.

That quarterly strength has led economists to talk about GDP growth exceeding 7% in the July-September period. Nayar said robust IIP growth in the second quarter, alongside strength in high-frequency indicators, supports that expectation. The optimism is real, but it sits on top of a month where several key sectors softened at the same time.

For readers, the takeaway is uncomfortable. The economy is still growing at a healthy clip, yet the cracks are showing exactly where everyday spending is most sensitive. Mining is falling, consumer durables are cooling and the factors economists are watching most closely point toward tighter household budgets. The next few monthly prints will show whether September was a blip or the start of a more painful trend.