India Coal Stocks 2026: Why 39% of Power Plants Are Critically Low Despite 1 Billion Tonnes of Annual Production

India produces more than 1 billion tonnes of coal a year.

Coal India still had around 76 million tonnes sitting at its pitheads in early September.

Its supplies to the power sector actually increased in August.

Yet around September 19, 74 of the 190 coal-based power plants monitored by the Central Electricity Authority were in the critical-stock category, equivalent to roughly 39% of the monitored fleet.

At the same time, another number was moving sharply in the opposite direction.

India's electricity index grew 11.6% year-on-year in August 2026, while the coal-production index contracted 3.8%.

That divergence gets to the heart of the problem.

India is not simply running out of coal.

The challenge is getting enough coal from the right mines, through the transport network, into the stockyards of the right power plants quickly enough to match a power system whose requirements can change much faster than coal can be mined and moved.

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What does a "critical" coal stock actually mean?

The word "critical" can make the situation sound as if a plant is about to stop operating.

That is not necessarily what the classification means.

The Ministry of Coal defines a critical thermal power plant as one where coal stock has fallen below 25% of the normative requirement.

And the normative requirement itself is not the same for every plant.

CEA's revised coal-stocking norms require different levels of inventory depending on whether a plant is located close to the coal mine.

For September, the norms are:

CEA's annual-report data show that the norms vary through the year. Pithead plants are expected to maintain between 12 and 17 days of stock, while non-pithead plants are expected to maintain between 20 and 26 days, calculated around an 85% plant load factor.

At 25% of the September norm, the critical threshold works out to roughly:

• 3 days of normative stock for a pithead plant
• 5 days for a non-pithead plant

So a critical classification is important.

But it is a measure of the inventory buffer available at the plant, not an announcement that the plant has already run out of coal.

Coal can continue arriving every day even while the plant remains below its desired stock level.

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India is not short of coal in aggregate

This is what makes the current situation interesting.

India is the world's second-largest coal producer and consumer.

Domestic production reached:

Coal now supplies more than 70% of India's electricity generation, according to the Ministry of Coal.

So the country has not suddenly lost its ability to produce coal.

In fact, July 2026 provides a useful example.

Overall coal production increased 7.51% year-on-year to 69.75 million tonnes, while dispatch rose even faster to more than 86 million tonnes.

The Ministry of Coal also reported that thermal power plants received 68.83 MT of coal in July, 13.41% more than a year earlier.

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August's most important number is 11.6% vs -3.8%

The latest Index of Core Industries gives us perhaps the clearest picture of the pressure building inside the system.

In August 2026:

And the difference is not limited to one month.

Between April and August 2026:

• the electricity index grew 9.6%
• the coal index declined 3.2%

These indices do not measure electricity demand and coal supply in exactly the same units.

But they reveal an important divergence.

The electricity side of the economy was expanding rapidly while coal production was weaker than a year earlier.

A power plant can temporarily deal with that mismatch by consuming coal already sitting in its stockyard.

But if consumption repeatedly runs ahead of replenishment, the stockpile begins to fall.

That is exactly why inventory exists in the first place.

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How coal actually reaches a power plant

Coal availability is often discussed as if coal production and power-plant supply are the same thing.

They are not.

Every stage matters.

Coal can be available nationally while being unavailable at the exact power station that needs it.

For example, a mine can have sufficient coal but face problems loading it.

Railway capacity may be available overall but not in the required corridor at the right time.

A plant may receive coal every day while still consuming even more.

And coal already moving through the rail network is counted very differently from coal physically sitting inside the power station.

This distinction becomes especially important during the monsoon.

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Why the monsoon disrupted more than coal production

India's 2026 monsoon has been unusual.

IMD's updated seasonal forecast projected all-India rainfall at 90% of the Long Period Average, with an 84% probability of below-normal or deficient rainfall.

El Niño conditions also developed during the season.

But below-normal rainfall nationally does not mean every coal-producing region receives less rain.

India's rainfall distribution can vary sharply by region.

Coal India reported prolonged spells of intense rain during July and August, particularly across parts of its East-Central coal-producing regions.

And rainfall affects much more than the number of tonnes that can be dug out of the ground.

Coal India identified several operational problems:

• freshly mined coal becoming wet and sticky
• lower coal seams becoming submerged
• internal mine haul roads requiring repair
• difficulties in coal handling
• problems moving coal through transport routes and loading systems

When the rain eased in early September, Coal India's average daily production increased from around 1.36 MT during September 1-3 to 1.83 MT on September 6.

Power-sector dispatch increased from around 1.37 MT to 1.70 MT per day over the same period.

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A large part of India's coal was sitting away from power plants

The difference between national coal availability and plant-level coal availability becomes especially clear when we look at where the inventory was located.

On August 4, the Ministry of Coal reported:

• 34.55 MT of coal physically stocked at thermal power plants
• about 113 MT at pitheads and in transit

Combined availability was approximately:

The Ministry said that was equivalent to roughly 62 days of power-sector coal consumption.

On paper, 148 MT sounds comfortable.

But more than 110 MT of it was not sitting inside power-plant stockyards.

A month later, Coal India still reported approximately 76 MT of pithead inventory, along with another 46 MT of coal exposed and ready for mining.

This is the central paradox.

Because coal at a mine cannot generate electricity until it reaches a boiler hundreds or sometimes more than a thousand kilometres away.

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Railways become critical when plant stocks fall

Once plant inventories become thin, transport speed matters almost as much as mine production.

The government's response in early September illustrates this.

Coal loading to the power sector increased from:

That was an increase of 74 rakes per day, or around 20%, in only three days.

The Ministry of Coal specifically said that plants below 25% of their normative stock were being monitored and that corrective coal-supply measures were being taken.

Coal India also offered additional coal for road lifting, including supplies to critical plants, while damaged internal transport routes were being repaired.

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Why Coal India could supply more even while coal output fell

At first glance, two August numbers appear contradictory.

The Core Industries index says India's coal output declined 3.8% year-on-year.

Yet Coal India says its overall August supplies increased 5.5%, while supply to the power sector rose 4.5% to 48.46 MT.

Both can be true.

There are two important differences.

First, the Core Industries number covers the broader coal-production index, while Coal India is one part, although by far the largest part, of India's coal industry.

Second, production and dispatch are different measures.

A coal company can dispatch coal produced earlier from existing inventory even during a month when fresh production is weak.

That is another reason inventory matters at multiple points in the chain.

There is:

• coal underground
• coal already mined at the pithead
• coal being transported
• coal sitting at the power station

Those quantities are not interchangeable.

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The shortage is not the same at every power plant

Another reason national averages can mislead is that coal availability differs sharply by plant.

For example, the Ministry of Coal said that as of September 15, none of Uttar Pradesh Rajya Vidyut Utpadan Nigam's thermal plants was in the critical-stock category.

Punjab provides an even clearer example.

As of September 11, coal stocks at Punjab State Power Corporation's three thermal plants stood at around 114% of normative requirement.

Yet at the national level, a large number of other stations were below critical thresholds.

This reinforces the underlying point.

If India were facing one uniform national coal shortage, we would expect plants across the system to be affected more evenly.

Instead, the position varies substantially by plant.

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Why coal still matters despite 300 GW of non-fossil capacity

India's electricity system is changing rapidly.

As of July 31, 2026, India had crossed 300.5 GW of non-fossil generation capacity, equivalent to more than 54% of total installed capacity.

This included:

• 164.59 GW solar
• 58.14 GW wind
• 57.24 GW hydro
• 11.75 GW bio-power
• 8.78 GW nuclear

So why does a shortage of coal inventory still matter so much?

Because installed capacity and actual electricity supplied are different things.

From April to June 2026, coal and lignite plants supplied 69.54% of India's electricity.

And during non-solar peak-demand hours, coal and lignite plants had generated as much as 188.8 GW, around 75% of total generation at that point.

Solar generation falls away after sunset.

Wind generation varies with conditions.

Hydropower depends partly on water availability.

Storage is expanding, but is not yet large enough to replace the role of coal across all non-solar hours.

That is why coal-stock levels remain a system-wide reliability indicator.

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Does low plant stock mean power cuts are coming?

Not necessarily.

This distinction is important.

A plant being classified as critical means its inventory has fallen below the prescribed threshold.

It does not mean:

• the plant has stopped generating
• no new coal is arriving
• the grid is facing an immediate shortage
• every plant has the same number of operating days remaining

CEA monitors coal stocks daily, while the Ministries of Coal, Power and Railways coordinate supply when plant inventories become stressed.

Coal deliveries can also continue while a plant remains technically classified as critical.

The risk increases when consumption continues to exceed receipts for a prolonged period.

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Can imported coal solve the problem?

Imports can provide additional flexibility, but they are not a complete solution to the underlying logistics problem.

India permits coal imports under Open General Licence, with users deciding their requirements based on commercial considerations.

But the government's broader direction has been towards reducing power-sector import dependence.

Thermal power plants imported 45.4 MT of coal in FY2025-26, down from 62.5 MT the year before, a decline of around 27.4%.

In April 2026, power-sector coal imports were 3.51 MT, 24.9% lower than a year earlier.

Imported-coal-based plants will naturally continue to require overseas fuel, while domestic plants can also import depending on technical requirements and commercial economics.

But if domestic coal already exists at mines or within the transport system, replacing it with imports does not address the original bottleneck.

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India's power challenge is moving beyond generation capacity

India has added generation capacity rapidly.

Coal and lignite capacity alone stood at around 230.8 GW by July, while total non-fossil capacity crossed 300 GW later that month.

So the power-sector question is increasingly becoming more complicated than:

A modern electricity system also needs enough flexibility across:

The current coal-stock situation is therefore one part of a larger resource-adequacy problem.

Adding generation capacity increases how much electricity India can produce.

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What should we watch from here?

Five numbers will tell us whether the pressure is easing.

1. Number of critical plants

The first indicator is whether the number of plants below 25% of normative stock begins falling.

2. Coal stock at thermal power plants

Pithead inventory is useful, but plant-end inventory tells us how much physical buffer power stations actually have.

3. Power-sector coal dispatch

Coal India's daily and monthly dispatch figures will show whether deliveries are rebuilding plant inventories faster than coal is being consumed.

4. Railway rake loading

The early-September increase from 370 to 444 rakes per day showed how quickly transport capacity can be raised when stocks become stressed.

5. Electricity growth

If electricity generation continues growing much faster than coal production, inventory could remain under pressure even as mining and logistics normalise.

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What the coal-stock problem really tells us

India's coal situation looks contradictory only if coal production and coal availability are treated as the same thing.

They are not.

India produced more than 1 billion tonnes of coal in FY2025-26.

Coal India entered September with tens of millions of tonnes of coal at its mines.

Its August supplies to power producers were higher than a year earlier.

Yet roughly 39% of monitored coal plants were sitting below critical inventory levels around September 19.

The missing link is movement and timing.

August electricity output in the core-sector index grew 11.6%.

Coal output declined 3.8%.

Heavy rain disrupted mining, handling and internal transport in important coal regions.

And a substantial amount of available coal was sitting at pitheads or moving through the transport system rather than inside individual power stations.

The government responded by increasing coal production, dispatch and railway rake loading as rainfall eased.

So the current problem should not be read simply as evidence that India needs to mine more coal.

That challenge becomes more important as India's power system grows.

Because electricity demand can rise within hours.

Coal cannot move from a mine to a distant power station nearly as quickly.

The buffer between those two systems is the coal stock sitting at each plant.

And that is why a country producing more than one billion tonnes of coal can still find dozens of power stations running critically low at exactly the moment electricity output accelerates.

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FAQs

1. How many Indian coal power plants are currently at critical stock levels?

Around September 19, CEA's daily plant-level coal data showed 74 of 190 monitored plants in the critical-stock category, equivalent to about 39%. CEA publishes the daily coal position through the National Power Portal.

2. What does "critical coal stock" mean?

The Ministry of Coal currently defines a critical thermal plant as one with coal stock below 25% of its normative requirement. Normative stock depends on the plant type and month.

3. How much coal does India produce?

India produced 1,040.08 million tonnes of coal in FY2025-26, after producing 1,047.52 MT in FY2024-25.

4. Why are plants short of coal if India produces so much?

Coal has to move through a physical chain from mines to stockyards, loading points, railways or roads and finally individual power stations. A large amount of coal can therefore be available nationally while particular plants have low inventories because of transport, location, consumption or supply timing.

5. Did coal production decline in August 2026?

The coal component of India's Index of Core Industries declined 3.8% year-on-year in August 2026. Over the same month, the electricity index increased 11.6%.

6. Did Coal India reduce supplies to power plants in August?

No. Coal India reported that its supplies to the power sector increased 4.5% year-on-year to 48.46 MT in August. Production and dispatch are different measures, and coal can also be dispatched from existing mine inventory.

7. Does critical coal stock mean a power plant will shut down?

Not necessarily. Critical status measures the level of coal inventory against a prescribed norm. Plants can continue receiving coal and generating electricity while their stock remains below the threshold.

8. Why does coal still matter when India has over 300 GW of non-fossil capacity?

Non-fossil sources accounted for more than 54% of installed capacity by July 2026, but coal and lignite still supplied 69.54% of electricity between April and June. They also provided around 75% of generation during certain non-solar peak-demand hours.

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Disclaimer: This article is for educational and informational purposes only. Coal-stock positions, electricity generation, fuel dispatch and plant classifications change daily. Figures referring to critical power plants represent the position reported around September 19, 2026 and should not be treated as a forecast of electricity shortages, power prices or the financial performance of any power or coal company.