Insurance Topic
Combined Ratio
The aggregate measure of underwriting performance calculated by summing loss-related and expense-related costs relative to earned premiums.
Definition
Combined ratio is an insurance underwriting metric equal to the sum of the loss ratio and the expense ratio, expressing the proportion of premium revenue consumed by claims, claim adjustment expenses, and operating costs.
Structural Characteristics
- Loss ratio component reflects claims and loss adjustment expenses
- Expense ratio component reflects underwriting and administrative costs
- Calculated using earned premiums as the denominator
- Primarily applied to property and casualty insurance lines
Parameters & Conditions
- Influenced by underwriting discipline and pricing adequacy
- Affected by commission structures and operational efficiency
- Sensitive to claim development and expense allocation methods
- Reported on accident-year, calendar-year, or policy-year bases
Topic Relationships
Exceptions, Limitations & Boundaries
Combined ratio excludes investment income and capital gains and does not, by itself, measure overall insurer profitability or long-term solvency.
Combined Ratio: Definitional FAQ
Does combined ratio include investment results?
No. Combined ratio evaluates underwriting performance only and excludes investment income.
Can combined ratio exceed 100%?
Yes. A ratio above 100% indicates underwriting costs exceed earned premiums.
Is combined ratio used in life insurance?
It is primarily used in property and casualty insurance and is not a standard metric in life insurance.