India's Smartest
Financial Calculator Hub
Calculate EMI, SIP returns, GST and Income Tax instantly. Built for Indian users, updated for FY 2026-27.
EMI Calculator
Calculate your monthly loan EMI for home, car or personal loans. Get amortization schedules instantly.
SIP Calculator
Find out how much your monthly SIP investments will grow. Year-wise wealth projections included.
GST Calculator
Add or remove GST for any slab rate. CGST, SGST and IGST breakdown included.
Income Tax Calculator
Estimate your tax liability for FY 2026-27. Compare New vs Old Regime side by side.
Why SmartaxCalc?
Built specifically for Indian financial needs
Real-time Results
All calculations update instantly as you type — no page reloads.
Privacy First
Every calculation runs in your browser. We never store your financial data.
Mobile Friendly
Designed for all screens. Works flawlessly on phones, tablets and desktops.
Accurate Formulas
Built with standard financial formulas and up-to-date Indian tax legislation.
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View allFrequently Asked Questions
Quick answers to common questions
?Is SmartaxCalc free to use?
Yes, all calculators on SmartaxCalc are completely free. No sign-up, no subscription, no hidden charges — ever.
?Are the calculations accurate?
All calculators use standard financial formulas and up-to-date Indian tax rules (FY 2026-27). Results are indicative — consult a CA or financial advisor for formal advice.
?Does SmartaxCalc store my financial data?
No. All calculations happen entirely in your browser. We never collect, store, or transmit your salary, loan amount, or any other financial information.
?Which tax regime is better — New or Old?
For most salaried individuals earning up to ₹12.75L per year, the New Regime (FY 2026-27) is better due to the ₹12L rebate limit and revised slabs. Use our Income Tax Calculator to compare both for your exact income.
?Can I use these calculators on my phone?
Absolutely. SmartaxCalc is fully responsive and works perfectly on all mobile devices. You can also access it quickly from your browser without installing an app.
?What is the difference between inclusive and exclusive GST?
Exclusive GST (Add GST) means GST is added on top of the price shown. Inclusive GST (Remove GST) means the price already contains GST and you want to find the base price.
About SmartaxCalc
SmartaxCalc is a free, privacy-first financial calculator website built specifically for Indian users. Our tools cover the four most commonly used financial calculations in India: EMI for loan planning, SIP for mutual fund investment projections, GST for business and personal transactions, and Income Tax under both the New Regime and Old Regime.
All calculators are updated for FY 2026-27 (AY 2027-28) with the latest tax slabs, standard deductions, and Section 87A rebate rules. The EMI calculator uses the standard reducing balance formula used by all Indian banks and NBFCs. The SIP calculator uses the standard future value of annuity formula to project mutual fund wealth.
India-specific features include Indian number formatting (lakhs and crores), INR currency symbol, GST CGST/SGST breakdown for intra-state transactions, and tax regime comparison that highlights which option saves you more money based on your specific income and deductions.
SmartaxCalc does not require any sign-up or personal information. All calculations happen entirely within your browser. We are committed to keeping these tools free, accurate, and accessible to every Indian.