The Water Economy

Most countries have an economy with an energy sector inside it. Bhutan is closer to the reverse: an energy system with a country attached. Hydropower anchors the export ledger, the national budget, the industrial base and the external debt. The momo stall and the ministry both run, at one remove, on the monsoon.

So the clearest way to understand Bhutan’s economy is not GDP tables. It is to follow the water — from the river, through three forks, to the money. At each fork, someone decides who gets the power and at what price. Those three decisions, compounded over fifty years, are the Bhutanese economy.

The source: a one-resource superpower

Start with what the rivers give. Bhutan has built 3,632 MW of hydropower — Tala and the new Punatsangchhu-II at just over a thousand megawatts each, Mangdechhu, Chhukha, and a tail of smaller plants — and in 2025, with PHPA-II finally online for a full year, generation hit a record 15,803 GWh, up 35.8% in a single year.

Two facts frame everything downstream. First, this is still a fraction of the endowment — roughly a tenth of the technical potential, which is why the state’s plans speak of tens of gigawatts more. Second, the supply is seasonal: the monsoon months produce several times what the country can use, and the winter months produce a fraction of it. Bhutan’s power is abundant on average and scarce on schedule — an exporter for half the year, a buyer for the other half.

Fork one: export it, or use it at home?

For forty years this fork barely existed: Bhutan used little and sold the rest south. Chhukha (1986), Tala (2006–07) and their siblings were built as export machines, financed by India and repaid in electricity — the arrangement that made the dams possible and quietly set their prices for decades.

Then, in 2025, something crossed over that had never crossed before:

Domestic consumption (9,160 GWh) overtook exports (7,925 GWh) for the first time in Bhutan’s history. Peak demand has more than quadrupled in a decade — 336 MW in 2015 to 1,477 MW by late 2025. The export machine now feeds itself first. That is not a failure; it is a transformation — but it changes what every new dam is for. Punatsangchhu-II was conceived as export revenue; it arrives into a country that increasingly wants the power at home.

Fork two: the factory, or the kitchen?

Follow the domestic branch and it forks again, and this is the fork almost nobody outside the sector sees. Bhutan’s domestic electricity does not mainly go to its households. It goes to industry — about 88% of it, consumed by just 23 high-voltage customers: the smelters and ferro-alloy plants of Pasakha, the cement works, and the round-the-clock digital loads of the sovereign Bitcoin-mining programme, whose publicly announced BitDeer joint venture scales toward some 600 MW. The remaining ~10% covers 99.96% of all customers — every home, shop, school and monastery in the kingdom.

That concentration is a policy, not an accident: cheap power is Bhutan’s one industrial advantage, and the state has priced it to recruit energy-hungry industry. It worked — so well that industry now is the domestic demand, and the new always-on loads consume like cities while employing like workshops. The fork’s next question is already visible: when Gelephu, the data centres and the next smelter all ask for firm power, the winter gap — over 1,100 GWh bought back from India each lean season, often at Nu 4–6 a unit — gets wider and dearer.

The price ladder: who pays what

Now overlay the prices, because this is where the water economy shows its strangest face. Rank every buyer of Bhutan’s electricity by what they pay per unit and the ladder comes out upside down: a household above the subsidised blocks pays Nu 2.66; India’s grid pays Nu 2.12–2.55 under the legacy export contracts; and the 23 industrial giants pay Nu 1.60 — among the cheapest industrial power on earth. The smallest buyer pays the most; the biggest buyers pay the least; and the 2025–28 tariff revision proposed to keep that shape while more than doubling the household rate. The full anatomy of that inversion — how each rung got there, and who carries the winter losses — is its own story: Who Gets the Cheap Power?

Only the newest export rung breaks the pattern: Punatsangchhu-II sells at Nu 5.10, rising to a levelised 5.67 — double the old contracts, because it reflects what dams now cost. But it is priced in rupees, with no dollar clause, on escalation steps below Indian inflation — the currency trap, renewed for thirty-five more years.

Where the water lands: the treasury

Follow the money to its end and the water economy becomes the state itself. The dams’ earnings flow through the operator DGPC into Druk Holding & Investments, whose dividends, taxes and royalties deliver around 40% of all national domestic revenue — Nu 22 billion in 2024, with hydro the largest single engine of DHI’s back-to-back record profits. When the monsoon is weak, the budget itself wobbles: the 2018 drought alone cut group profit by nearly a third.

The same river runs through the liabilities. Hydropower loans stand near Nu 172 billion — about 60% of Bhutan’s external debt — and the pipeline of ten further projects implies hundreds of billions more, financed the same way, repaid in the same softening rupee. The asset and the risk are one thing: a state whose income, industry and debt all sit on the same seasonal, warming, rupee-priced river.

The three decisions

Strip the water economy to its forks and Bhutan’s next twenty years reduce to three choices, made and remade every time a dam is commissioned or a tariff is filed:

1. Export or keep? The 2025 crossover answered this by momentum; answering it by design — what share of the next 10,000 MW is for India, and what for home — is the real energy policy.
2. Industry or households? Cheap power built an industrial base; it also built the most inverted price ladder in the region. Someone always gets the river at a discount. Choosing who is choosing what kind of economy Bhutan becomes.
3. Rupees or something harder? Every long contract renews the accidental currency bet. The Bitcoin experiment, the Gelephu dollar-zone idea, even the nuclear thought-experiment are all, at bottom, attempts to reroute this one fork.

Bhutan is called the hydropower kingdom as if the matter were settled. The truth is closer to the opposite: the kingdom is only now deciding what its water is for. The rivers will keep falling either way. Where the power — and the money — lands is still being chosen.