Bulgaria's economic growth and income convergence require higher investment and real growth rates beyond current potential. Scaling up quality public investment can boost economic growth and reduce regional disparities. The country faces substantial infrastructure quality and availability gaps, with public investment lagging peers. Improving public investment efficiency is critical for greater returns on public spending. Bulgaria has significant EU funds (€18.7 billion) available for public investment, primarily as grants, but slow absorption and inefficiencies remain challenges. The DIGNAR model simulations show that full EU funds absorption and improved public investment efficiency could boost GDP by 2.3% in 2030. Key recommendations include accelerating EU fund absorption, implementing reforms for disbursement, and enhancing investment planning, project appraisal, and procurement processes to maximize growth dividends.