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About RupeeMath

RupeeMath is a free financial calculator platform built specifically for Indian investors, borrowers, and taxpayers. We offer 13 calculators covering investments (SIP, FD, PPF, RD, SWP, Step-Up SIP), loans (EMI, home loan eligibility, joint home loan), and taxes (income tax, ITR, HRA, salary breakdown, gratuity, GST). Every calculation runs entirely in your browser — your salary, loan amount, and investment details are never sent to any server.

RupeeMath was built by Hetuk Patel, a software engineer with over five years of experience building data-intensive web applications and a parallel passion for Indian personal finance. All formulas are verified against RBI circulars, SEBI regulations, and the Income Tax Act. When the Union Budget updates tax slabs or interest rates change, we update within 24 hours. The site is completely free — no registration, no subscription, no premium tier. We believe access to accurate financial calculations should not be paywalled.

Common reasons people contact us: reporting a calculation error or formula discrepancy, suggesting a new calculator that would be useful for Indian users, asking for clarification on how a specific formula works, or reaching out about partnerships or business enquiries. We also welcome general feedback about the site design, mobile experience, or content quality.

We aim to respond to every message within 1–2 business days. For urgent calculation issues (where you believe a formula is incorrect), please include the specific inputs you used and the result you expected — this helps us reproduce and fix the issue quickly. Bug reports with reproducible steps are always treated as high priority.