The Asian Infrastructure Investment Bank turned ten on January 16. It began in 2015 as a 56-country institution the Obama administration actively lobbied allies to stay out of, on the grounds that a China-led, Beijing-headquartered bank would inevitably become a vehicle for Belt and Road politics rather than genuine multilateral lending. The United Kingdom joined anyway. So, eventually, did most of the G7 except Japan and the United States. A decade later the AIIB counts 111 members across six continents, representing 81 percent of the world's population, and has approved just over $70 billion of its own capital across more than 320 projects — with total mobilized financing, including co-financed projects, running past $200 billion.
The clearest evidence the boycott failed is the relationship AIIB now has with the institution it was supposedly built to undercut. By August 2025, the AIIB and the World Bank had jointly financed 56 projects worth $13.6 billion, making the AIIB the World Bank's single largest co-financing partner — not a rival ecosystem, but a bank that shows up on the same loan documents.
The AIIB was supposed to be Beijing's answer to the World Bank. A decade on, it's the World Bank's biggest co-financing partner.
Where AIIB genuinely differs from the ADB and the World Bank is governance, not lending style. Regional members hold 72.8 percent of AIIB's voting power, compared with 65 percent at the ADB — a deliberate design choice that keeps Asian shareholders, and especially China, in structural control. China alone holds just over a quarter of AIIB's votes; Russia and India rank second and third. That voting structure is precisely what Washington objected to in 2015 and precisely what member governments, including many US allies, decided they could live with in exchange for another source of infrastructure capital in a region the ADB estimates needs $26 trillion in investment through 2030.
The bank's lending has also shifted toward the categories Western critics said it would ignore. Green and sustainable financing is now one of AIIB's four declared strategic pillars, alongside cross-border connectivity, private capital mobilization and digital infrastructure. It published its first sustainability report, aligned with international climate-disclosure standards, in 2025 — a level of voluntary transparency the bank's early skeptics didn't expect from a Beijing-headquartered institution.
None of that settles the geopolitical argument. AIIB's overlap with Belt and Road projects is real in countries where Chinese state banks, AIIB and bilateral Chinese lending all show up on the same infrastructure pipeline, and Beijing's structural voting advantage is not going away. But the bank that Washington predicted would function as a shadow of Chinese foreign policy has instead spent a decade building the kind of co-financing relationships — with the World Bank, with the ADB, with private capital — that make it look, on the page, like an ordinary multilateral development bank. That may be the least dramatic outcome anyone predicted in 2015. It also appears to be the accurate one.