The infrastructure funding crisis describes the chronic underfunding of municipal infrastructure relative to needs—aging systems requiring rehabilitation or replacement, growing communities needing new capacity, and climate change requiring adaptation investments, all against limited revenue capacity. This crisis results from multiple factors: municipal revenue tools haven't kept pace with responsibilities, federal and provincial investments haven't matched downloading of services, construction costs have risen faster than general inflation, and decades of deferred maintenance have compounded problems. Consequences include deteriorating asset conditions, service disruptions, increased emergency repairs (more expensive than planned maintenance), and infrastructure that doesn't meet modern standards for efficiency or resilience. Addressing the crisis requires sustained funding increases from all orders of government, better asset management to optimize limited resources, difficult prioritization of competing needs, and potentially new municipal revenue tools. The crisis is widely acknowledged but solutions remain politically and fiscally challenging.