This research empirically examines the nexus between governance quality and economic performance, utilizing a balanced panel dataset that encompasses all 63 provinces of Vietnam over the 2018–2022 period. The methodological approach employs a fixed effects model to juxtapose the business-centric Provincial Competitiveness Index (PCI) with the citizen-oriented Public Administration Performance Index (PAPI), thereby offering a multifaceted evaluation of institutional efficacy. The empirical results reveal a statistically significant positive relationship between efficacious governance—as proxied by the Weighted PCI and the Law and Order index—and real GDP per capita. Conversely, the analysis identifies a detrimental effect of deficient administrative procedures, measured by the PAPI Procedures index, on economic expansion. This finding lends robust support to the “sand in the wheels” hypothesis, which contends that bureaucratic impediments escalate transaction costs and constrain economic activity. A notable finding is the attenuated influence of foreign direct investment (FDI) on economic growth when institutional variables are controlled for, underscoring the contingency of FDI efficacy on a conducive governance framework. In conclusion, this study posits that the cultivation of a provincial governance ecosystem—characterized by administrative efficiency, transparency, and a steadfast adherence to the rule of law—constitutes a fundamental prerequisite for sustainable subnational development in Vietnam.