The budget for Australia’s contentious Aukus deal has ballooned by more than $430m over four years, with the agency charged with securing the country’s nuclear-powered submarines requiring a massive injection of funding and staffing.

The Australian Submarine Agency’s resourcing for next financial year will jump by a third – from $385m to $512m.

Staffing at the ASA is also set to jump, from about 883 positions to 1,209 next year, an increase of 37%.

The 2025-26 budget papers forecast the agency having total resourcing of $1.7bn for the four years to 2028-29. This year’s budget has expanded that forecast to more than $2.13bn for the same time period, an increase of $431m.

Sign up for the Breaking News Australia email

In the previous budget, ASA’s total annual budget peaked at $529m in 2026-27.…