IMPACT: This article examines how the development of e-government (EGDI), open data, and citizen participation (EPI) jointly influence the G20 countries in achieving the Sustainable Development Goals (SDGs). EGDI is shown to have a positive influence on progress towards delivering the SDGs. Data openness and EPI further strengthen this effect. The strongest impact emerges under conditions of simultaneous implementation. The findings offer actionable insights for public sector accountants, auditors, policy-makers, and digital government strategists concerned with digital reform and sustainable development.