Claim Severity Calculator

Severity and frequency are the actuarial foundation of insurance pricing. Severity = average dollar per claim. Frequency = claims per exposure-year. Together: pure loss cost. This calculator helps landlords benchmark their own loss experience against insurer pricing.

Total paid losses ($)

Number of claims

Total exposure (unit-years)

Current annual premium

Claim severity (avg $ per claim)

$31,667

Claim frequency per 100 exposure-years

2.50%

Pure loss cost per unit-year

$792

Loss ratio

791.7%

How the math works

Claim severity = average $ paid per claim. Claim frequency = claims per exposure-year. Together they drive pure loss cost (severity × frequency) — the baseline insurers price against. High severity, low frequency: catastrophic events. Low severity, high frequency: small but frequent claims (water damage, burst pipe).

Pure loss cost + expense load + profit margin = fair premium. If your premium exceeds pure loss cost by more than 2x, you're paying for someone else's claims. Time to shop or self-insure portion.

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 Claim Severity Calculator is built to give a quick, browser-based estimate for claim severity. Severity and frequency are the actuarial foundation of insurance pricing. Severity = average dollar per claim. Frequency = claims per exposure-year. Together: pure loss cost. This calculator helps landlords benchmark their own loss experience against insurer pricing. 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 claim severity 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 claim severity 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 total paid losses over a multi-year window.
Enter claim count and total exposure-years (e.g., 40 units × 5 years = 200).
Enter current annual premium.
Read severity, frequency, pure loss cost, and loss ratio.

Frequently Asked Questions

What's a good loss ratio?

Under 60% — you're a profitable client; may be overpaying relative to risk. 60-85% — fair pricing. Over 90% — insurer is losing money on you; premium will rise at renewal or coverage will be dropped.

How long a look-back?

Minimum 3-5 years for credible severity estimates. Insurers typically use 5-10 years for commercial real estate. One bad year shouldn't drive pricing conclusions.

Severity trends?

Severity has been rising 5-8% per year (inflation, labor, materials). Frequency is roughly flat for most property lines. Insurer pricing reflects severity trend more than anything.