Problem
Business users often need a fast leasing cost estimate before they are ready for a formal financial offer.
Case study
Leasing Calculator — business leasing estimate tool
Business calculator demo for quick indicative leasing cost estimates before a finance offer conversation.
Goal
Build a calculator that handles common leasing inputs, displays a clear result summary and can capture a lead.
Status
Production-like business tool demo
Stack
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Key features
- Asset type, net/gross value and VAT conversion.
- Down payment, leasing period, buyout and annual rate inputs.
- Simplified insurance, GAP and service estimates.
- Monthly net/gross rate, financed amount, installments and financing cost summary.
- Scenario presets, print/save-friendly result and lead endpoint.
Technical decisions
- Calculation logic lives outside UI components so it can be tested directly.
- The formula uses a simplified annuity calculation for indicative estimates.
- The UI includes a financial disclaimer instead of presenting results as an offer.
What I learned
- Separating business calculation logic from interface state.
- Designing a result summary for a practical business workflow.
- Writing responsible copy for indicative financial values.
Next improvements
- Add more edge-case tests for calculation scenarios.
- Improve lead persistence beyond webhook forwarding.
- Add analytics for calculator usage.
- Improve accessibility of controls.
Limitations
The calculator is informational and simplified. It is not a financial offer and results may differ from real leasing proposals.