Fixed deposits continue to be a popular choice among investors looking for relatively predictable returns without direct exposure to stock-market fluctuations. But how much can a ₹1 lakh fixed deposit actually become over a long period? The answer depends largely on the interest rate, tenure and compounding frequency.
A recent calculation shows how ₹1 lakh could grow over 10 years at interest rates of 6%, 7% and 8% under a cumulative FD structure. The figures highlight why even a small difference in interest rates can make a noticeable difference over a long investment period.
₹1 Lakh FD: 10-Year Maturity Calculation
If ₹1 lakh is invested for 10 years and the interest is compounded quarterly, the approximate maturity values are:
| Interest Rate | Approximate Maturity Amount |
|---|---|
| 6% | ₹1,81,940 |
| 7% | ₹2,00,966 |
| 8% | ₹2,21,964 |
At 6%, the investment grows to roughly ₹1.82 lakh. At 7%, it crosses the ₹2 lakh mark, while an 8% rate can take the maturity value to approximately ₹2.22 lakh.
This means that moving from a 6% to an 8% interest rate could make the final amount around ₹40,000 higher over the decade. The difference becomes significant because interest is added to the principal and subsequent interest is calculated on the accumulated amount.
How Does FD Compounding Work?
In a cumulative FD, the investor generally does not receive periodic interest payouts. Instead, the interest is added to the deposit and continues earning interest during the remaining tenure.
For example, the interest earned during one period becomes part of the amount on which future interest is calculated. This is known as compound interest, often described as earning “interest on interest.”
However, actual maturity amounts can vary depending on the bank’s compounding method, interest rate, tenure and specific FD terms.
Is a 10-Year FD a Good Option?
A long-term FD can be useful for investors who prioritise predictable returns and capital preservation. However, investors should not select an FD solely on the headline interest rate. Current rates vary significantly between banks and deposit categories. Some 10-year FD rates for regular customers are currently around the 6% range, while certain institutions offer higher rates.
Bank deposits are also covered by DICGC insurance up to ₹5 lakh per depositor per bank, subject to applicable rules.
Before investing, compare the effective interest rate, compounding frequency, premature withdrawal rules, tax implications and the financial institution’s terms.
For someone starting with ₹1 lakh, the calculation demonstrates one important lesson: time and compounding can have a major impact on long-term savings.