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Calcimator

Rate Filing Calculator

Calculate indicated rate changes for insurance rate filings using loss ratio and expense analysis.

Inputs

$
$

Results

Indicated Rate Change

-7.1%

Required Premium

$9,285,714.00

≈ 22 average U.S. homes

Actual Loss Ratio65%
Permissible Loss Ratio70%
Profit Provision$500,000.00
How to Use This Calculator
  1. Enter the current written premium and loss data for the experience period.
  2. Input the trend factors for loss cost and premium.
  3. Set the development and credibility factors.
  4. Review the indicated rate level change and the proposed overall rate change.
  5. Document all actuarial assumptions in the supporting memorandum for the regulatory filing.

How the result changes with Earned Premium

Earned PremiumIndicated Rate ChangeRequired Premium
$1,000,000,000.00-99%$9,285,714.00
$3,500,000,000.00-99.7%$9,285,714.00
$6,500,000,000.00-99.9%$9,285,714.00
$9,000,000,000.00-99.9%$9,285,714.00

What each input means

Earned Premium
Total earned premium at current rate level
Ultimate Losses
Projected ultimate losses including IBNR and development
Fixed Expense Ratio (%)
Fixed expenses as a percentage of premium (overhead, salaries)
Variable Expense Ratio (%)
Variable expenses as a percentage of premium (commissions, taxes)
Profit Target (%)
Target underwriting profit as a percentage of premium

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Earned Premium = 10000000, Ultimate Losses = 6500000, Fixed Expense Ratio (%) = 10, Variable Expense Ratio (%) = 25 = 5 input(s) provided
  2. Calculate Indicated Rate Change
    Indicated Rate Change
    -7.1 = -7.1%
  3. Calculate Required Premium
    Required Premium
    9285714 = $9,285,714
  4. Calculate Actual Loss Ratio
    Actual Loss Ratio
    65 = 65%
  5. Calculate Permissible Loss Ratio
    Permissible Loss Ratio
    70 = 70%

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