Frontend · Live
Convenience Fee Calculator
A faithful browser replica of a production payment-commission engine — so stakeholders can interrogate the maths before the feature ships.
What it does
May – Jun 2026
Mirrors a production commission calculator exactly: integer-cent arithmetic with no floating point, gross-up so the merchant nets the intended amount, FIXED / PERCENTAGE / TIERED strategies, fee caps and thresholds, VAT handling, and basis-point partner revenue splits where the last partner absorbs the rounding remainder.
Every config knob is editable and the full audit snapshot is exposed, so product and finance can stress-test edge cases without filing a ticket.
It doubles as the reference spec the dashboard team built their own calculator against.
Build
Personal project
- Arithmetic
- Integer cents, no float
- Strategies
- Fixed · Percentage · Tiered
- Partner splits
- Basis points
Stack
- React
- Vite
- JavaScript