Who Gets the Cheap Power?

Stand anywhere in Bhutan and the electricity around you came from the same falling water. The lightbulb in a Trashigang kitchen, the arc furnace in a Pasakha ferro-alloy plant, the export line humming south toward the Indian grid — one river system, one grid, largely one state-owned generator. You might expect one price.

Instead there are four. And when you rank the buyers by what they actually pay per unit, the list comes out upside down.

The smallest buyer in the country pays the most. The 23 largest customers — the high-voltage industries that consume about 88% of all domestic electricity — pay the least: Nu 1.60, about 1.9 US cents a kilowatt-hour, which is cheaper industrial power than almost anywhere on earth. Iceland’s famous aluminium-smelter contracts are dearer. Every OECD factory pays multiples of it. And in between sits India, buying Bhutan’s export surplus under decades-old contracts at prices below what a Bhutanese family pays for its own river’s electricity.

That is the shape of Bhutan’s water economy at the point of sale. It is worth understanding how it got that way — because none of it happened by malice, and all of it now pinches.

How the ladder inverted

Each rung has an honest history.

The exports are cheap because they are really loan repayments. Tala’s INR 2.12 is not a market price; it is the visible edge of a financing deal. India financed the dam; Bhutan repays through decades of fixed-tariff supply. Strip out the debt service and the state’s net retained earning on that power is roughly Nu 0.60–1.00 per unit — the cheapest rung of all, though it never appears on a bill. The contracts made the dams possible; they also priced the water, in rupees, for thirty years — and the rupee has spent those decades melting.

Industry is cheap on purpose. The HV1 tariff was set low to do what cheap power is supposed to do: anchor factories, smelters and — lately — the round-the-clock digital loads of a sovereign mining programme in a country with no other industrial advantage. It worked. High-voltage industry now absorbs the vast majority of domestic consumption, and domestic consumption overtook exports for the first time in 2025.

Households are dear because wires to villages are dear. Serving 99.96% of customers who use only ~10% of the power means strings of transformers up mountainsides for a handful of meters each. Cost-of-supply studies genuinely do put retail service above bulk industrial supply. The lifeline blocks — 100 free units in the lowlands, 200 in the highlands — shield the poorest consumers from the raw rate.

Each rung is defensible. Stack them, and the defence gets harder: the many small buyers, paying the top rate, sit beneath a structure in which the biggest consumers — foreign and domestic — pay the least. The cross-subsidy points uphill.

The winter twist

The inversion sharpens every winter. When the rivers thin, Bhutan buys power back from India at market prices — Nu 4–6 a unit, often coal-fired — to keep the grid alive. For those months the arithmetic is brutal: the state imports at 4–6, sells to its largest industries at 1.60, and to households at 2.66. Every winter unit consumed at those tariffs is sold at a loss the public absorbs. The cheap-power ladder is underwritten, at the margin, by the national budget buying dear.

The 2026 flashpoint

This is the structure the 2025–2028 tariff revision collided with. The Bhutan Power Corporation’s filing proposed lifting the household rate from Nu 2.66 toward an unsubsidised Nu 5.73 — a 115% jump for 99.96% of customers — while the 23 HV1 customers faced a proposed rise from Nu 1.60 to Nu 2.80: a big percentage, from a floor so low that the destination, about 3.3 US cents, would still be bottom-decile industrial power globally. Parliament noticed, and said so. The government’s answer — subsidies to soften the household increase — softens the bill, not the shape. The ladder stays inverted; the difference is simply paid from the treasury instead of the meter.

What the ladder is really telling you

It is tempting to read this as a story about greed, and it is not. It is a story about what each era of Bhutan’s water economy optimised for. The export contracts optimised for getting dams built at all. The HV1 tariff optimised for industrialising a country with one comparative advantage. The retail tariff optimised for cost recovery on an expensive rural grid, softened by subsidy. Every rung made sense the year it was set.

But eras end. The export rung was priced in a currency that kept losing value. The industrial rung now serves loads — mining above all — that consume like a city and employ like a workshop. The household rung is being asked to double precisely when a plate of momo already costs six times what it did a generation ago. And the whole ladder leans on a river that climate change is making less punctual.

The question the inversion poses is simple to state and hard to answer: when the next era of Bhutan’s water economy is priced, who should the cheap power be for? The factory, the foreign grid, the miner, the household — someone always gets the river at a discount. For fifty years it has been everyone except the family holding the bill.