This paper examines the impact of labour and product market reforms on private investment across 26 advanced economies from 1975 to 2020. To this end, we combine a narrative database on major structural reforms with local projections and augmented inverse probability weighting. We find that a major labour market reform typically increases the level of real private investment by 5% cumulatively within six years, while a major product market reform yields an impact of 3%. Structural reforms are particularly effective in stimulating private investment when the private sector has access to ample external finance and the rule of law is strong. Overall, our findings point to an important role for structural reforms in boosting private investment and thus long-term growth prospects in advanced economies.