FD Calculator: Fixed Deposit Calculator
Compute FD maturity, find required principal, or compare two deposits. Covers all compounding frequencies.
🏦 What is a Fixed Deposit Calculator?
A Fixed Deposit (FD) calculator is a financial tool that computes the maturity value of a bank fixed deposit using the compound interest formula A = P(1 + r/n)^(nt), where P is the principal, r is the annual rate, n is the number of compounding periods per year, and t is the tenure in years. It removes the need for manual arithmetic and instantly shows how much your deposit will grow to, how much interest you will earn, and what the effective annual yield is.
Fixed deposits are one of the most popular savings instruments in India and across Asia because they offer guaranteed returns, capital protection, and a predictable income stream. Whether you are parking an emergency fund in a short-term 6-month FD, building toward a goal with a 3-year cumulative deposit, or comparing rates across banks before committing, this calculator covers all three use cases through its three modes: Maturity, Reverse FD, and Compare FDs.
A common misconception is that all FDs with the same stated rate earn the same interest. This is not true. An FD at 7.5% compounded quarterly actually earns an Effective Annual Rate (EAR) of 7.71%, while the same 7.5% compounded annually earns exactly 7.50%. Over a 5-year deposit of 10 lakhs, the difference in compounding alone adds up to over 6,000 in additional interest. This calculator shows the EAR for every calculation so you can compare deposits on a true apples-to-apples basis.
The Reverse FD mode is particularly useful for goal-based planning. If you need 5 lakhs in 3 years for a home renovation and your bank offers 7.5% quarterly, the reverse calculator tells you exactly how much to deposit today, which is roughly 4.02 lakhs. You do not need to guess or trial-and-error the principal. The Compare mode is equally practical when you are choosing between two banks or two FD tenures that offer different rates and compounding frequencies.
📐 Formula
📖 How to Use This Calculator
Steps
💡 Example Calculations
Example 1 - Standard FD: 1 Lakh at 7.5% for 3 Years (Quarterly)
Deposit 1,00,000 at 7.5% p.a. with quarterly compounding for 3 years
Example 2 - Reverse FD: How Much to Deposit for a 5 Lakh Goal?
Target: 5,00,000 in 5 years at 7.25% quarterly compounding
Example 3 - Compare FDs: 7.0% Annual vs 7.0% Quarterly on 2 Lakhs for 5 Years
Same rate but different compounding: annual vs quarterly, 2,00,000 for 5 years
❓ Frequently Asked Questions
🔗 Related Calculators
What is a Fixed Deposit (FD) and how is it different from a savings account?
A Fixed Deposit is a term deposit offered by banks and NBFCs where you lock in a lump sum for a fixed period at a predetermined interest rate. Unlike a savings account, the rate does not change during the tenure and you cannot withdraw freely without a penalty. In return, FDs offer higher interest rates than savings accounts, typically 1-4% higher depending on tenure and the bank.
What is the FD maturity formula?
FD maturity is calculated using compound interest: A = P(1 + r/n)^(nt), where A is the maturity amount, P is the principal, r is the annual interest rate as a decimal, n is the number of compounding periods per year, and t is the tenure in years. Interest earned is simply A minus P.
What compounding frequency do Indian banks use for FDs?
Per RBI guidelines, most Indian banks compound FD interest quarterly (n = 4 per year). Some banks, particularly for non-cumulative FDs paying monthly interest, may use monthly compounding. Always check your bank's product brochure or account statement to confirm the compounding frequency used.
What is the difference between a cumulative and a non-cumulative FD?
A cumulative FD reinvests the interest back into the deposit so interest compounds over the tenure. You receive the full maturity amount (principal plus compounded interest) at the end. A non-cumulative FD pays out interest at regular intervals (monthly, quarterly, or annually) without reinvesting. Cumulative FDs always produce a higher total return because of compounding.
What is the Effective Annual Rate (EAR) and why does it matter?
EAR is the true annual yield after accounting for intra-year compounding. Formula: EAR = (1 + r/n)^n minus 1. An FD paying 7.5% with quarterly compounding has EAR = (1.01875)^4 minus 1 = 7.71%. EAR lets you compare deposits with different compounding frequencies on a level playing field. When comparing an FD at 7.5% compounded quarterly against one at 7.6% compounded annually, the EAR shows which actually earns more.
How much will a 1 lakh FD earn at 7.5% for 3 years with quarterly compounding?
Using A = 1,00,000 x (1 + 0.075/4)^(4x3) = 1,00,000 x (1.01875)^12 = 1,00,000 x 1.2514 = 1,25,144. Interest earned = 25,144. The effective annual rate is 7.71%, meaning you actually earn 7.71% per year on your deposit due to quarterly compounding.
How do I find the principal needed to reach a target FD maturity amount?
Use the Reverse FD mode. Enter the target maturity amount, the interest rate your bank offers, and the tenure. The formula rearranges to P = Target / (1 + r/n)^(nt). For example, to accumulate 2 lakhs in 5 years at 7% quarterly: P = 2,00,000 / (1.0175)^20 = 2,00,000 / 1.4148 = 1,41,367. You need to deposit about 1.41 lakhs today.
Is FD interest taxable in India?
Yes. FD interest is added to your total income and taxed at your applicable slab rate. If total FD interest from one bank exceeds 40,000 per year (50,000 for senior citizens), the bank deducts TDS at 10%. You can submit Form 15G (or Form 15H for senior citizens) to avoid TDS deduction if your total income falls below the taxable limit.
What is the penalty for breaking an FD before maturity?
Most banks charge a premature withdrawal penalty of 0.5-1% below the applicable rate for the period the deposit was held. For example, if you break a 7.5% FD after 2 years and the 2-year rate is 7%, the bank may pay 6.5% (7% minus 0.5% penalty). Tax-saving FDs under Section 80C have a 5-year lock-in and cannot be broken early.
How do I compare two FD plans with different rates and compounding frequencies?
Use the Compare mode. Enter the principal, rate, tenure, and compounding frequency for each plan. The calculator shows maturity amount, total interest earned, and EAR for both plans, then tells you which plan yields more and by exactly how much. The EAR is especially useful when the two plans use different compounding frequencies.
What is the maximum amount that can be invested in a Fixed Deposit?
There is no maximum limit on FD investments at most Indian banks. However, deposits above 5 lakhs per bank are not fully covered by the Deposit Insurance and Credit Guarantee Corporation (DICGC), which insures only up to 5 lakhs per depositor per bank. For larger amounts, consider spreading deposits across multiple banks.
Is a Fixed Deposit better than a SIP mutual fund?
FDs offer guaranteed capital protection with a fixed return (typically 6.5-8% in India). SIPs in equity mutual funds have historically returned 12-15% over 15-plus year periods but carry market risk and no return guarantee. For short-term goals (under 3 years) or for emergency funds, FD is the safer choice. For long-term wealth creation goals (10 or more years), equity SIPs have significantly outperformed FDs after accounting for inflation.