The four structural leaks — USD 375M a year

Four distinct structural transfers from Bhutan to India run simultaneously through the closed-loop relationship. Each was authored by a different decision, in a different decade, by a different ministry. Each is defensible in isolation.

The aggregate is roughly USD 375 million per year on current run-rates. To put that in scale: it is about 1.4× the country’s most-recent annual hydropower export earnings (USD 208M in CY 2023).

The three saffron lines are ongoing cash outflows — they show up in the country’s balance of payments each year. The fourth (CMA seigniorage) is foregone revenue: a counterfactual claim Bhutan has never asserted in 52 years of sharing a currency with India.

The forward present value across all four lines, modelled out to ~2060, runs in the range of USD 4–6 billion (roughly 1.5–2× current GDP). The number is large because each leak compounds across decades and because, in three of the four cases, the trajectory is widening rather than narrowing.