Insurance Loss Ratio Calculator

Loss ratio is the core insurance health metric — paid + reserves divided by premium. Under 60%: profitable. 60-85%: acceptable. Above 85%: insurer loses money. Landlords should track loss ratio to anticipate renewal pricing and consider self-insurance when ratios get high.

Paid claims ($)

Earned premium ($)

Reserves (for open claims)

Incurred loss ratio (claims + reserves)

77.78%

Pure loss ratio (paid only)

66.67%

Margin above claims (if positive)

22.22%

Status

Acceptable

How the math works

Loss ratio = claims ÷ premium. Under 60% = insurer highly profitable on this account. 60-85% = acceptable. Over 85% = insurer losing money; renewal will see rate increase or non-renewal. Add reserves (known-but-unpaid) for incurred loss ratio — the actuarial standard.

Insurers target 90-95% combined ratio (claims + expenses). Loss ratios above 80% usually trigger underwriting action; above 100% and the insurer is losing money on the account.

Editorial noteMaintained by EveryCalc - Reviewed June 2026

EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.

Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.

Learn more about our review process on the EveryCalc methodology page.

How this calculator works

What this page estimates

This Insurance Loss Ratio Calculator is built to give a quick, browser-based estimate for insurance loss ratio. Loss ratio is the core insurance health metric — paid + reserves divided by premium. Under 60%: profitable. 60-85%: acceptable. Above 85%: insurer loses money. Landlords should track loss ratio to anticipate renewal pricing and consider self-insurance when ratios get high. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.

Calculation approach

The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.

Example workflow

For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.

Practical checks

Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
Run a low, base, and high case when the inputs are estimates.
Check the related calculators below when the next decision depends on a different assumption.

How to interpret the insurance loss ratio result

Best use

Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.

Cross-check

Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.

Watch for

Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.

This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.

Before relying on this insurance loss ratio estimate

Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.

Confirm source numbers

Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.

Separate cash flow from total cost

A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.

Run conservative cases

Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.

Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.

How to Use

Enter paid claims and earned premium.
Enter reserves for any open / pending claims.
Read pure and incurred loss ratios.

Frequently Asked Questions

Why incurred vs paid?

Paid is what's been spent. Incurred includes reserves for claims that are open but not paid out yet. Insurers and actuaries always use incurred — it's more forward-looking and complete.

Renewal signal?

Above 85% incurred loss ratio typically triggers renewal rate increase (10-20%) or non-renewal. 100%+ almost always means non-renewal from that carrier. Shop 60-90 days before policy expiration.

Include legal defense?

Loss adjustment expense (LAE) — legal defense, investigators, settlement — is typically separate from the loss ratio. Carriers sometimes combine into 'loss + LAE ratio.' Ask what your insurer uses.