Project Details
FeeCalc
Know your real margins before you quote
What I Built
Built complete pricing engine with real-time card fee calculations and responsive UI from scratch
Key Outcomes
Tech Stack
Project Overview
A simple but essential tool for content creators to calculate actual earnings after platform fees. Supports multiple platforms (YouTube, Twitch, Patreon, etc.) with accurate fee structures. Built with TDD methodology - tests written before implementation.
Built For
Service business owners
Manually calculating credit card processing fees costs time and introduces errors
Key Features
Multi-Platform Support
Calculate fees for YouTube, Twitch, Patreon, and more
TDD Built
100% test coverage with Vitest and Playwright
Bidirectional
Calculate net-to-gross or gross-to-net
Challenge Solved
Maintaining accuracy across constantly changing platform fee structures. Implemented a data-driven approach where fee configs are separate from calculation logic.