Most enterprises underestimate what their ageing IT infrastructure is actually costing them — in money, speed, and competitive position. Legacy systems don't fail dramatically; they erode capability quietly, making every new feature more expensive and every integration more complex than it needs to be.

The visible costs — maintenance contracts, specialist staff, hardware — are only part of the picture. The real cost of legacy infrastructure includes four categories that rarely appear on a single line item in any budget.

Legacy debt compounds. Every workaround added to a legacy system makes the next change harder. Enterprises that delay modernisation are not standing still — they are falling further behind. The Reserve Bank of India's 2025 Financial Stability Report identified legacy IT infrastructure as one of the top five systemic risks to the Indian banking sector.

The right time to modernise is before a legacy system becomes a crisis. Reactive modernisation — driven by failure, regulatory action, or competitive emergency — costs significantly more than planned migration.