CASE 2

Installment & Settlement Calculator

An application calculating fees, VAT, and final payouts according to diverse BNPL provider formulas, reverse-calculating base prices

Live Interactive Demo Workspace
/demos/installment-calculator/index.html

Fully interactive preview — try the controls inside as they are

Results & Operational Metrics

Reverse CalcBase Price from Sale Value
Instant ResultsFees & Final Amount, No Manual Math
Unified LogicAcross All BNPL Providers
High AccuracyIn Fees, VAT & Settlements
Business Challenge

Varying formulas across installment providers made manual calculations error-prone, with results differing from one calculation to another

Objectives

Standardize calculation logic, increase fee/tax/settlement accuracy, and speed up reaching the final amount

My Role

Formula analysis, calculation logic development, UI design, and full end-to-end implementation

Implementation

Analyzed provider formulas, unified them into a single calculation engine, and built an easy-to-use interface that outputs fees and the final amount instantly

Tools & Technologies

BNPL Calculation Engine, UI Design

Business Impact

Manual calculation errors and result discrepancies were eliminated; fees, VAT and settlements follow a unified formula for each provider