Definition:Combined ratio
📊 Combined ratio is the standard profitability metric for property and casualty insurers, calculated by adding the loss ratio to the expense ratio. Expressed as a percentage, it measures the total cost of claims and operating expenses relative to earned premium. A combined ratio below 100 percent indicates an underwriting profit, meaning the insurer is collecting more in premiums than it spends on losses and expenses; a ratio above 100 percent signals an underwriting loss.
🧮 The loss ratio component captures incurred losses and loss adjustment expenses as a share of earned premium, while the expense ratio reflects acquisition costs — such as commissions and brokerage fees — plus general and administrative overhead. Some analysts further decompose the metric into a trade combined ratio (using net figures) and a gross combined ratio to understand reinsurance effects. Because it distills underwriting performance into a single number, the combined ratio is featured prominently in quarterly earnings, rating agency reviews, and investor presentations.
💰 Tracking the combined ratio over time reveals whether an insurer's underwriting discipline and cost structure are sustainable. A carrier consistently below 100 percent is generating profit purely from insurance operations, before any contribution from investment income — a hallmark of disciplined risk selection and claims management. Conversely, a persistently elevated ratio may prompt reinsurers to tighten terms and rating agencies to reconsider the company's outlook. For these reasons, the combined ratio remains the single most-watched indicator in any conversation about an insurer's financial health.
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