Contact RupeeMath
Have questions or feedback? We'd love to hear from you.
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.
Our Mission
Most Indians make major financial decisions — taking a home loan, starting a SIP, choosing a tax regime — without access to the accurate, personalised calculations that should inform those decisions. A visit to a CA or financial advisor costs money many cannot spare, and generic online tools either use incorrect formulas or bury results behind sign-up walls and subscription fees. RupeeMath exists to eliminate that gap. Every tool on this platform uses the exact formulas that banks, regulators, and tax authorities actually use — not simplified approximations — and delivers them instantly to anyone with an internet connection.
We are committed to staying accurate as regulations evolve. India's financial landscape changes every Union Budget: tax slabs shift, Section 80C limits are revised, home loan interest deduction rules change. We track these changes and update every affected calculator within 24 hours of any official CBDT, RBI, or SEBI notification. Our income tax calculator currently reflects the FY 2025-26 slabs under both the new and old regimes as announced in the Union Budget 2025. The home loan eligibility calculator uses the FOIR norms currently applied by SBI, HDFC, ICICI, and other major lenders as of 2026.
Privacy is a core design principle, not an afterthought. When you enter your salary, loan amount, or investment figures on RupeeMath, that data is processed entirely in your browser using JavaScript. Nothing is transmitted to our servers, stored in a database, or shared with third parties. There is no account system, no cookies tracking your financial data, and no profile built from your calculations. You get the result and that is the end of the data lifecycle.
RupeeMath will always be free. We do not plan to introduce a premium tier, charge for PDF downloads, or gate any calculator behind a paywall. The tools are supported by non-intrusive display advertising. If you find value in RupeeMath, the best way to support us is to share a specific calculator with a friend or colleague who needs it — that is the only growth mechanism we depend on.
What can we help with?
- Bug reports or calculation errors
- Suggestions for new calculators
- General feedback about the site
- Business or partnership enquiries