Periods of uncertainty often reveal the true strength of financial institutions. Economic crises, changing regulations, rising interest rates, and sudden shifts in market confidence can quickly test a bank’s ability to survive and grow. While some institutions emerge stronger from these challenges, others find their growth ambitions constrained by weaknesses hidden beneath the surface. Sustainable growth sits at the heart of this challenge. It is the ability to expand without undermining financial stability or becoming overly dependent on external capital. More than a measure of growth, sustainable growth reflects how effectively a bank balances profitability, funding, risk management, operational efficiency, and capital strength while navigating an increasingly complex financial environment. This book explores the forces that shape sustainable growth in modern banking. It examines how liquidity conditions, funding structures, lending activity, asset quality, asset management, financial leverage, and operational performance influence a bank’s capacity to maintain long-term expansion. Drawing on the experience of Indonesia’s commercial banking sector and connecting it to broader developments in global finance, the discussion highlights why some banks are better positioned to sustain growth through changing economic cycles. Combining practical financial insight with a broader perspective on banking resilience, this book offers a clear understanding of the decisions, trade-offs, and financial foundations that support sustainable growth in an uncertain world.