Loss Cost Pass Through Change Percent Calculator
Actual signed change in matched independently verified loss-cost estimates. Same exposure/coverage/currency basis required; not inferred full premium change or automatic pass-through permission.
Description
A loss-cost change compares estimates on the same exposure and coverage basis.
A loss-cost change compares estimates on the same exposure and coverage basis.1
Its percentage change is not automatically the change in a final premium.
When to use Loss Cost Pass Through Change Percent Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the contract, jurisdiction, reporting basis, currency and dated evidence that apply.
How to use Loss Cost Pass Through Change Percent Calculator and understand its results
- Establish the contract, jurisdiction, reporting basis, currency and dated evidence that apply.
- Enter previousVerifiedLossCostMinor, newVerifiedLossCostMinor, using the field meanings and rules below, then run the tool.
- Read result.signedChangePercent, using the output meanings and calculation rules below.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| previousVerifiedLossCostMinor | Previous verified loss cost minor | number | Required |
| newVerifiedLossCostMinor | New verified loss cost minor | number | Required |
Use a strictly positive previous loss-cost amount and nonnegative new amount, both safe-integer minor units on the same basis. Form the exact signed difference, multiply by one hundred and divide by the previous amount to return a floating-point signed percentage.
changePercent=100×(newLossCost−previousLossCost)/previousLossCost Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Calculated observation or qualified reference | object |
| result.signedChangePercent | signed Change Percent; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"previousVerifiedLossCostMinor": 10000,
"newVerifiedLossCostMinor": 11000
},
"output": {
"result": {
"signedChangePercent": 10
}
}
}Limitations and assumptions
Currency, exposure and coverage bases must already match. No regulatory permission or total-premium pass-through is established.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Expense Ratio Underwriting Percent Calculator: An underwriting expense ratio compares expenses with the applicable premium denominator for a matched period. For a complementary comparison, use Combined Operating Ratio Insurer Calculator: An operating-ratio convention combines matched loss, expense and investment-income ratios.
References
Similar or alternative tools
- Expense Ratio Underwriting Percent Calculator
An underwriting expense ratio compares expenses with the applicable premium denominator for a matched period.
- Combined Operating Ratio Insurer Calculator
An operating-ratio convention combines matched loss, expense and investment-income ratios.