COVID-19 has complicated plans to achieve the Sustainable Development Goals (SDGs) by 2030. As we are witnessing a proliferation of recovery initiatives by governments and international financial institutions, we need to ensure that additional resources align with larger environmental and sustainability goals. Cities and local authorities have a key role to play, as they have a unique capacity to implement and monitor sustainable policies at the local level with immediate feedback loops. For this reason, policy-makers must be equipped with tools that allow them to assess the impact of their budgets and COVID-19 relief schemes on the 2030 Agenda. The G20 can play a central role in setting standards for reporting on such data for both domestic and development cooperation funding.