Achieving the Sustainable Development Goals (SDGs) requires effective national initiatives and resource allocation. Yet, the simultaneous attainment of all goals is hindered by constraints such as limited budgets and resources, varied national priorities, and the intricate nature of the goals. As we approach 2030 and beyond, an urgent need for an effective, data-driven prioritisation system exists to optimise what can be accomplished. A considerable knowledge gap persists in identifying the priority areas that demand concentrated attention and how their improvement would propel overall sustainability goals. To bridge this gap, our study presents a prioritisation approach that identifies significant SDG indicators based on urgency and impact, utilising Benchmarking, Bivariate, and Network analysis. Furthermore, we introduce an innovative Impact Index (IMIN) to assess an indicator’s extensive effect on the SDG network. This system carries significant international relevance by establishing a robust framework to identify key, potent, and interconnected indicators. It supports decision-makers worldwide in comprehending their nation’s SDG performance and promotes efficient resource allocation. In the specific context of Australia, our analysis spotlights several impactful, yet underperforming SDG indicators. These include the protection of Freshwater, Terrestrial, and Mountain Key Biodiversity Areas (KBAs), the share of renewable energy and energy intensity level of primary energy, targeted research and development, gender equality in national parliaments, and carbon-efficient manufacturing, amongst others.