Fixed Deposit (FD) Calculator
Calculate precise quarterly-compounding FD maturity value and understand your pre-tax wealth generation.
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The 2026 Master Guide to Fixed Deposits
Your Fixed Deposit is legally protected. Under the Deposit Insurance and Credit Guarantee Corporation (DICGC), your bank deposits (including principal and interest) are insured up to a maximum of ₹5,00,000 per bank, per PAN card. If you are depositing more than ₹5 Lakhs, it is mathematically safer to split the capital across different banking institutions.
1. The Mathematics of FD Compounding
Most retail investors assume FDs compound annually. In India, the standard banking practice is Quarterly Compounding. This means the bank calculates your interest every 3 months and adds it back to your principal.
Because of this, your "Effective Yield" will always be slightly higher than the "Declared Interest Rate." For example, a 7.00% declared rate compounded quarterly yields approximately 7.18% annually. Note: For tenures strictly under 6 months, banks switch the math and use Simple Interest.
2. The Brutal Truth About FD Taxation
Fixed Deposits are not tax-free. Every rupee of interest you earn is added to your "Income from Other Sources" and taxed exactly at your marginal income tax slab. If you are in the 30% tax bracket, a 7% FD actually only yields you roughly 4.9% post-tax.
- If your total interest from a single bank exceeds ₹40,000 per year (₹50,000 for Senior Citizens), the bank will automatically cut 10% TDS before crediting your account.
- If your total income is below the taxable limit (e.g., you earn less than ₹3 Lakhs), you must proactively submit Form 15G (or Form 15H for senior citizens) to the bank to prevent them from deducting this 10% TDS.
Want to Master Fixed Deposits?
Stop guessing your yields and safety. Read our 2026 Master Guide to understand quarterly compounding math, the DICGC safety strategy, and how to avoid catastrophic tax traps.
Read the FD Master GuideFrequently Asked Questions
Can I withdraw my FD before maturity?
Yes, standard FDs can be broken prematurely. However, the bank will calculate interest at the lower rate applicable for the period the deposit actually ran, and then slap an additional 0.5% to 1.0% penalty on top of that.
What is a Tax-Saving FD?
A Tax-Saving FD allows you to claim a Section 80C deduction on your principal amount (up to ₹1.5 Lakhs). The catch? It comes with a strict 5-year lock-in period. You cannot break it prematurely under any circumstances. Furthermore, the interest generated is still fully taxable.
How do Senior Citizens benefit from FDs?
Individuals above 60 years receive a higher interest rate (usually 0.50% more than regular citizens). More importantly, under Section 80TTB, they can claim a direct tax deduction of up to ₹50,000 on their interest income, severely reducing their tax burden.
Actuarial & System Assumptions
This simulation engine is provided for illustrative, educational, and strategic planning purposes only. It does not constitute a financial contract, legal guarantee, or fiduciary advice.
Calculations rely on deterministic inputs and compounded mathematical growth models. Real-world inflation, sequence of returns, market volatility, and asset degradation will cause actual results to deviate.
Tax brackets, government subsidies (e.g., PM Surya Ghar), and statutory interest rates are subject to continuous legislative amendments. This engine does not guarantee real-time legal compliance.
Rupee Logics is a mathematical simulator, not a SEBI-registered entity. Users are strictly advised to verify all capital allocations and liability assumptions with certified financial professionals.