What this Combined Ratio Calculator does
The Combined Ratio Calculator calculates a combined ratio from three figures you provide: incurred losses, expenses, and earned premium. Enter amounts in the same currency and for the same reporting period. The result is a percentage calculated from those supplied figures.
In insurance analysis, the combined ratio brings together claims costs and expenses relative to earned premium. A simple version of the calculation adds incurred losses and expenses, then divides that sum by earned premium. This calculator uses that stated method and displays the result as a percentage with two decimal places.
The calculation depends on the quality and consistency of the inputs. It does not decide which accounting items belong in each figure, reconcile reports, or verify a company’s financial statements. It is a transparent arithmetic aid for figures that you have already selected and checked.
How to use the Combined Ratio Calculator
Enter the three amounts below, keeping their units and periods aligned:
- Incurred losses are the loss amount you intend to include for the selected period.
- Expenses are the expense amount included in your chosen calculation.
- Earned premium is the premium amount earned over that same period.
Use one currency throughout, such as dollars or euros. Do not enter losses in dollars and premium in thousands of dollars unless you first convert them to matching units. The earned premium must be greater than zero because it is the divisor. Then calculate the result and read the displayed percentage.
For example, suppose incurred losses are 500,000 currency units, expenses are 300,000 currency units, and earned premium is 1,000,000 currency units. Add losses and expenses to get 800,000. Divide 800,000 by 1,000,000, then multiply by 100. The combined ratio is 80.00%.
How the Combined Ratio Calculator formula works
The formula is 100 × (incurred losses + expenses) ÷ earned premium. First, losses and expenses are added together. That total is divided by earned premium to produce a ratio. Multiplying by 100 expresses the ratio as a percentage.
For instance, a result of 80% means the entered losses and expenses equal 80% of the entered earned premium under this calculation. A result of 100% means those two cost figures add up to the earned premium amount. A result above 100% means the combined costs exceed the premium figure supplied. These statements describe only the relationship among the inputs. They do not, by themselves, establish why the result occurred or whether an insurer is financially sound.
The calculator reports a combined ratio from the supplied amounts. In many insurance reports, the combined ratio can also be understood as a loss ratio plus an expense ratio, with each component measured against earned premium. The direct formula here is equivalent when both components use the same premium basis and period. Different reporting definitions or included items can produce different results, so use the figures and definitions relevant to your analysis.
Use cases for the Combined Ratio Calculator
This calculation can help organize a basic comparison or check a piece of arithmetic. Possible uses include:
- Calculating a ratio from a prepared set of losses, expenses, and earned premium.
- Checking whether a spreadsheet result follows the stated formula.
- Comparing periods when the underlying figures were prepared on a consistent basis.
- Exploring how a change in one supplied amount affects the calculated percentage.
When comparing periods, keep the definitions consistent. A ratio based on one expense definition or premium basis may not be directly comparable with a result prepared using different conventions. Record the period, currency, source, and included items alongside any result you share.
Other factors to consider when calculating a combined ratio
The arithmetic is straightforward, but choosing the inputs requires care. Incurred losses may be affected by estimates, claim development, and adjustments made during a reporting period. Expenses may be grouped or allocated in different ways. Earned premium can also differ from written premium, so substituting one measure for another changes the calculation.
Before using a result, confirm that all three figures cover the same period and correspond to a consistent reporting basis. Check whether the values are stated in full currency units, thousands, or another scale. Make sure the loss and expense figures are not already expressed as percentages, since the formula expects amounts.
A combined ratio is one measure of underwriting performance and does not capture every aspect of an insurer’s operations. This calculator does not include investment income, taxes, capital, reserves analysis, or other measures unless they are already reflected in the inputs according to your chosen definitions. It also does not provide a forecast or professional assessment. Use the result as a calculation from supplied figures and consult appropriate reporting documentation when interpreting financial information.
Frequently asked questions
What does a combined ratio measure?
Under the formula used here, it measures incurred losses plus expenses as a percentage of earned premium. Its meaning depends on how those inputs are defined and prepared.
Why must earned premium be greater than zero?
Earned premium is the divisor. A zero value would make the calculation undefined, so enter a positive amount for the same currency and period as the other figures.
Can I use written premium instead?
This calculator is designed for earned premium. Written premium is a different measure. Use earned premium for a result that follows the displayed formula, or verify the intended basis before making a comparison.
What does a result above 100% mean?
It means the entered losses and expenses together exceed the entered earned premium. The percentage alone does not explain the causes or provide a complete assessment of an insurer.
Can I compare companies with this result?
You can compare calculated figures only with care. Check that the companies use comparable periods, currency scales, accounting definitions, and included items. The calculator does not normalize differences in reporting methods.