Breaking the Cost Curse

Nuclear power in the West has become a synonym for the runaway megaproject. In China it is a synonym for on-time delivery. The gap between those two realities is the single most important fact about the industry, and it is enormous.

The numbers are stark. China’s overnight construction cost, the bare build cost before financing, runs around $2,500 per kilowatt.^[1] America’s Vogtle expansion, two reactors finished in 2023 and 2024, cost about $35 billion, or roughly $15,600 per kilowatt, some six times China’s figure, and ran more than a decade late.^[1] Britain’s Hinkley Point C, priced at £35 billion in 2015, is now tracking toward £46 billion or more, with its first reactor not expected before 2030.^[4] By one estimate, Chinese unit costs are about a quarter of American ones.^[3]

Same reactors, same physics. One side finishes in six years for $2,500 a kilowatt; the other in fifteen for six times that.

Why China builds cheap

The advantage is manufactured, not mysterious. Analysts point to a consistent recipe: standardised, repeated reactor designs; rising domestic content, with costs stabilising once a plant passes about 75% local supply; regulatory stability; coordinated industrial policy; and, crucially, cheap state financing at rates as low as 1.4%.^[2] Building the same design many times, financed cheaply and permitted predictably, is how China completes reactors in five-to-seven years while Western projects run to fifteen.^[2]

Two honest qualifications. Cost comparisons mix metrics, overnight cost excludes financing, all-in project cost includes it, and China’s cheap capital widens the gap on an all-in basis, so the exact multiple depends on which measure you use. And Chinese figures rest on OECD and Chinese-reported data rather than audited accounts; the direction is beyond dispute, the last decimal is not.

Why we track this

Cost and speed are the whole ballgame in nuclear, and China’s edge here is the reason its build-out is credible where Western revivals so often are not. The lesson for investors is that the moat is industrial, not scientific: it lives in serial execution, supply-chain depth and financing structure, none of which a Western competitor can replicate by licensing a reactor design. It also reframes the export threat; a country that can build reliably at a quarter of the cost has a formidable offer for the developing world’s energy needs. The physics is universal; the ability to deliver it on budget is not, and that is where the value sits.