MonSuiviCA: why I stopped struggling with a spreadsheet to track my revenue
A client meeting, a basic question, four minutes of shame in front of a spreadsheet. That's where MonSuiviCA was born.
Build story
MonSuiviCA
Financial tracking for micro-entrepreneurs
- Status
- Live
- My role
- Design, development
- Online at
- monsuivica.fr
01
The starting problem
A French micro-entrepreneur doesn’t know how much they really earn each month once social contributions (URSSAF) and expenses are deducted. They patch it together in a spreadsheet or in their head, and dread every deadline.
02
The constraints
- An audience of non-accountants: zero jargon, the key figure in under two minutes.
- Tax rules that keep changing: ACRE, VAT thresholds, four activity regimes, the overseas departments.
- A minimal infrastructure budget.
03
The solution
- “Net available” dashboard: revenue, URSSAF contributions, fixed costs, VAT threshold alert.
- Tax calendar and automatic URSSAF reminders.
- Status simulator, accounting export.
- Separate showcase site with an URSSAF calculator, pages per trade and an overseas departments page.
04
The verifiable result
- App: 23 pages and 15 API routes; showcase site: 24 pagesSource: repository
- 355 unit testsSource: repository
- Version v1.3.8, 1 November 2026Source: git tag
- Showcase site and app onlineSource: monsuivica.fr and app.monsuivica.fr respond on 7 November 2026
No visitor or revenue figures here: only what can be checked.
05
The technologies
- Next.js 16
- React 19
- TypeScript
- Tailwind
- Firebase
- Vitest
- Docker
- Coolify