Quick guide
How to use this calculator
- Enter amounts from the same property scenario and use consistent periods and units.
- Use visitor-entered rates and allowances from your own documents rather than assuming a local rule.
- Review the component results and the calculator-specific decision boundary before acting.
Calculation method
Calculation method
Warranty scenario = premiums + expected service calls × service fee + uncovered eligible costs; self-funded scenario = sum of entered eligible cost × probability.
Entered fixed decimals remain exact through rational arithmetic. Planar distance outputs that require square roots use bounded numerical evaluation. Values round only for display, and unsupported or undefined states return an explicit message.
Worked example
Worked example
Two years of 600 premiums, two expected service calls at 100, and 300 uncovered costs total 1,700 before comparison with entered expected repairs.
Warranty scenario = premiums + expected service calls × service fee + uncovered eligible costs; self-funded scenario = sum of entered eligible cost × probability.
Supported inputs
Precision and limits
International scope
No currency, market price, interest rate, tax, tenancy rule, planning code, lender policy, or measurement definition is supplied automatically.
Scenario, not a decision
Results are arithmetic scenarios from visitor-entered values—not an appraisal, loan approval, legal interpretation, planning determination, forecast, or professional recommendation.
Precision and privacy
Inputs accept bounded plain decimals and remain in this browser. The engine prevents invalid denominators and misleading non-finite results.
Calculator-specific boundary
Eligibility, exclusions, caps, claim approval and provider performance are not inferred. Expected value does not predict an individual claim.
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