Combined Ratio

Combined Ratio is the headline underwriting-profitability metric for a general or health insurance line of business, computed as the sum of the Loss Ratio and the Expense Ratio expressed as a percentage of earned premium. A combined ratio below 100% means the line is generating an underwriting profit before any contribution from investment income on the float (the policyholder funds the insurer holds between premium collection and claim settlement); a combined ratio above 100% means the line is making an underwriting loss and is dependent on investment returns to deliver an overall profit. Indian general insurance has historically operated with combined ratios above 100% in motor and crop lines, with retail health closer to 100% in aggregate, and fire and engineering well below 100% in most years.

The metric breaks down into two principal components. Loss Ratio captures claims and loss-adjustment expenses divided by earned premium. Expense Ratio captures the insurer's operating costs — commissions, salaries, technology, marketing, infrastructure — divided by the same earned premium.

A combined ratio of 105% can decompose into 80% loss ratio and 25% expense ratio (a high-cost distribution model), or 90% loss ratio and 15% expense ratio (an underpriced book), and the diagnostic implications are very different. Worked example: a general insurer's motor portfolio in FY 2024-25 generates ₹3,500 crore of net earned premium, ₹2,520 crore of incurred claims (loss ratio 72%), ₹350 crore of loss-adjustment expenses (additional 10% of premium), and ₹560 crore of operating expenses (expense ratio 16%). Loss ratio = (2,520 + 350) / 3,500 = 82%.

Expense ratio = 16%. Combined ratio = 82% + 16% = 98%, indicating a 2% underwriting margin on motor, with investment income on the policyholder float a further contributor to overall profit. A second insurer with the same premium but a loss ratio of 90% and an expense ratio of 18% has a combined ratio of 108% — an 8% underwriting loss, with the line entirely dependent on investment income to break even.

A common misconception is that an under-100% combined ratio is always a sign of disciplined underwriting. It can also reflect a year of unusually low catastrophe losses (no major flood or cyclone) or favourable reserve releases on prior-year claims that proved less severe than initially provisioned. Look at three- to five-year averages to remove year-to-year noise.

Another common misconception is that combined ratio is comparable across all insurance lines. It is not — motor and health, with high claim frequency and short claim tails, can run combined ratios near 100% on a sustainable basis because investment income on the float is modest; long-tail commercial lines (liability, certain reinsurance) can sustain combined ratios above 100% because the float is held for years and generates substantial investment income. Compare within line.

Related: loss-ratio, expense-ratio-insurance, incurred-claim-ratio.