Insurance multiple-policy contribution calculator

Calculate model contribution by policy and total model payout with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Choose the currency for these amounts. Changing it keeps your numbers and does not convert exchange rates.

Use model contribution by policy and total model payout to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Common covered loss ($)
600
Contributing policies: name, participating limit $
A,300 B,600
Model contribution by policy ($)
A: 200.00; B: 400.00
Total model payout ($)
$600.00
Loss beyond participating limits ($)
$0.00
Participating limit share by policy (%)
A: 33.3333333333; B: 66.6666666667

Try another scenario

Common covered loss ($)
1200
Contributing policies: name, participating limit $
A,300 B,600
Model contribution by policy ($)
A: 300.00; B: 600.00
Total model payout ($)
$900.00
Loss beyond participating limits ($)
$300.00
Participating limit share by policy (%)
A: 33.3333333333; B: 66.6666666667
Calculation method

Calculation method

Model contribution by policy ($)

Allocate min(loss,total limits) in proportion to participating limits; use exact cent largest remainders and input-order ties.

Total model payout ($)

The smaller of supplied loss and participating-limit total.

Loss beyond participating limits ($)

max(0,loss−total participating limits).

Participating limit share by policy (%)

100×policy participating limit/total participating limits.

Symbols and units
a
Common covered loss ($)
b
Contributing policies: name, participating limit $

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • One explicitly proportional contribution model, with no deductible or insurer-specific order. It does not establish whether real policies contribute or which contribution clause applies.
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These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

NAIC: insurance terminology background; the displayed model is user specified ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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