Online Pay-Stub Generator

I need a business-oriented website that lets employees or contractors generate professional pay stubs on demand. The core of the build is an engine that automatically calculates taxes, deductions, and net pay from the figures a user enters, then packages the result into a downloadable PDF. Access must be gated by a secure email-and-password login so every user’s data stays private.

While visual polish matters, accuracy and reliability of the math come first. Payroll formulas should follow current federal and state guidelines, and the PDF layout has to look clean on both screen and print. If you can also leave hooks for future template customisation, that would give me room to grow the service.

Deliverables
• Responsive web app (desktop & mobile)
• Authentication flow with hashed passwords and email verification
• Calculation module covering gross pay, taxes, deductions, net pay
• Instant PDF generation and download for each stub
• Admin panel to view user activity and manage formulas

Please outline your preferred tech stack, a rough timeline, and any similar payroll or PDF projects you have shipped so I can see how you’ll approach this build.