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Loss Ratio Calculator.

Calculate insurance losses as a percentage of earned premiums.

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Loss ratio: 30.00% %

Loss ratio

30.00%%

FAQs

How does the loss ratio calculator work?

Enter the requested values to receive a deterministic result. No live market, tax, or jurisdiction data is inferred.

Cite this calculator

Canonical URL: https://mathify.one/zh/finance/loss-ratio

Cite as: Mathify. (2026). 计算器: Loss Ratio. https://mathify.one/zh/finance/loss-ratio

Use Cases

Insurance Underwriting Performance

Evaluate how well an insurance company is managing claims relative to premium income. A lower ratio suggests better underwriting discipline.

Example: An auto insurer with $5M in losses and $10M in premiums has a 50% loss ratio.

Premium Pricing Review

Assess whether current premium levels are adequate to cover claims. Helps in adjusting rates or identifying segments with high loss ratios.

Example: If a product line shows a 90% loss ratio, consider raising premiums.

Frequently Asked Questions

What is a loss ratio?
A loss ratio is the ratio of incurred losses to earned premiums, expressed as a percentage. It measures an insurer's claims payouts relative to the premiums it collects, indicating underwriting profitability.
How do I calculate the loss ratio?
Divide incurred losses by earned premiums and multiply by 100. For example, if incurred losses are $60,000 and earned premiums are $100,000, the loss ratio is 60%.
What is a good loss ratio?
A loss ratio below 100% indicates the insurer is collecting more in premiums than it pays in claims. However, a 'good' ratio varies by line of business; typically, 60-70% is considered healthy for many insurance segments.

Tips & Common Mistakes

Tips

  • Ensure you use incurred losses (including reserves) and earned premiums, not written premiums, for accurate results.
  • Compare your loss ratio to industry benchmarks for your specific insurance line to gauge performance.
  • Track loss ratio trends over time to identify emerging risk patterns or pricing issues.
  • Use this calculator as a quick reference; for formal analysis, consult actuarial guidance.

Common Mistakes to Avoid

  • Using written premiums instead of earned premiums, which can distort the ratio.
  • Forgetting to include loss adjustment expenses in incurred losses, leading to an understated ratio.
  • Comparing loss ratios across different insurance lines without adjusting for their unique risk profiles.

Last updated: August 13, 2026