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
Landlord payment = min(eligible approved cost, allowance); tenant excess = eligible cost − landlord payment + ineligible work; unused allowance = allowance − landlord payment.
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
A 100,000 allowance against 120,000 eligible and 10,000 ineligible work gives 100,000 landlord payment and 30,000 tenant responsibility.
Landlord payment = min(eligible approved cost, allowance); tenant excess = eligible cost − landlord payment + ineligible work; unused allowance = allowance − landlord payment.
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, documentation, deadlines, markup and forfeiture follow the lease and approval process.
Continue calculating