8th Pay Commission Arrears App

I want a small, browser-based tool that lets me calculate pay-arrears for the Indian 8th Central Pay Commission. I will be the only user, so there is no need for multi-tenant authentication; a simple password guard or local session check is fine.

Core workflow:
• Enter basic employee details, existing pay matrix level, date range, and any special allowances.
• Hit “Calculate” to run the arrears logic based on the officially notified 8th CPC fitment factors.
• View, download, or print a neatly formatted report that shows month-wise differences, totals, and deductions.
• Store every run in a lightweight database so I can pull it back later, edit inputs, and regenerate the report.

I am comfortable with a JavaScript/Node.js stack; Express on the back end and a clean front-end (plain HTML/CSS or React—your call) will do. SQLite or a simple JSON datastore is enough; no heavy infrastructure.

Deliverables:
1. Node.js project with clearly commented arrears-calculation module and official formulae hard-coded.
2. Responsive UI with forms, validation, and a printable/downloadable PDF report.
3. Local data persistence and a quick search/filter screen for past calculations.
4. Brief README explaining setup, environment variables, and how to add future CPC slabs.

If you have done financial calculators or payroll apps before, great—just point me to a demo and let’s get started.