Debt Service Coverage Ratio (DSCR)
The Debt Service Coverage Ratio measures a company's ability to service all debt obligations — both interest payments and principal repayments — from its operating cash flows, making it more comprehensive than simple interest coverage.
DSCR is calculated as net operating income (or EBITDA, adjusted for taxes and working capital) divided by total debt service, where debt service includes both interest expense and scheduled principal repayments falling due in the period. A DSCR of 1.25 means the business generates 1.25 rupees of operating cash for every 1 rupee of debt service obligation — providing a 25 per cent cushion.
The distinction from interest coverage is critical: many companies with adequate interest coverage still face repayment stress because principal repayments are lumpy or large. A business generating EBITDA of 200 crore with interest of 40 crore has an interest coverage of 5x — comfortable. But if it faces principal repayments of 180 crore in the same year, total debt service is 220 crore, and DSCR is only 0.91 — meaning it cannot service its obligations from operations alone and must refinance or find additional cash.
Project finance transactions — infrastructure, real estate development, renewable energy — are structured with DSCR covenants as the primary lender protection. A typical project finance term sheet in India requires maintaining DSCR above 1.20 to 1.30 throughout the project life. Breach of this covenant triggers acceleration provisions or lender approval requirements for operational decisions. DSCR modelling over the project lifetime, accounting for revenue ramp-up and debt amortisation schedules, is the foundational credit analysis for such transactions.
For listed companies, DSCR monitoring requires combining P&L data (EBITDA, taxes) with debt maturity schedules disclosed in annual reports and borrowing notes. The maturity profile — proportion of debt due within one year, one to three years, and beyond three years — determines near-term DSCR pressure. Companies with bullet maturities (large principal due in a single year) face acute DSCR stress in that year even if longer-term cash flows are adequate.
Refined DSCR calculations include cash tax payments rather than P&L tax expense, adjust for maintenance capex (which must be funded from operating cash flow to maintain asset productivity), and account for lease repayments under Ind AS 116. Each refinement moves the numerator closer to 'true' free cash available for debt service.
DSCR analysis was central to understanding the IL&FS collapse and subsequent contagion in 2018–2019: several special-purpose vehicles within the IL&FS group were generating operating cash flows but not meeting full debt service requirements, with shortfalls bridged by intercompany loans that ultimately proved circular and unsustainable.