The mechanism: AUKUS Pillar I promises Australia three to five used Virginia-class attack submarines starting in the early 2030s. But there's a gating condition nobody can skip: the U.S. Navy will not part with a boat until domestic production proves it can replace what it sells. That's why Congress isn't waiting for a transfer date to spend — it's spending now, on the shipyards and suppliers that have to get from today's ~1.2-boats-a-year pace up toward 2-a-year. Since FY2018, Congress has layered billions into submarine industrial-base (SIB) funding, and starting in 2025 committed $11.4 billion in SIB money across a five-year defense budget window specifically to lift Virginia-class throughput. Australia is chipping in too, pledging $3 billion directly into the U.S. supplier base under Pillar I. None of that spending depends on a boat ever actually reaching Adelaide — it's capacity money, flowing years ahead of any hull transfer, which is exactly why this is a durable, multi-year revenue mechanism rather than a single catalyst date to trade around.
Who cashes in: