₹10,000 SIP Vs ₹10 Lakh FD: Which Investment Could Build A Bigger Corpus In 15 Years?

How the two investment routes work

A Systematic Investment Plan, or SIP, allows an investor to put a fixed amount into a mutual fund at regular intervals. In this example, the monthly contribution is ₹10,000, which continues for 15 years.

The approach is suited to investors who want to invest gradually rather than commit a large lump sum at the beginning. The investment remains exposed to market movements, so the final value cannot be guaranteed in advance.

A fixed deposit takes the opposite approach. The investor places a lump sum with a bank or other eligible financial institution and agrees to a specified tenure and interest rate.

The ₹10 lakh FD in this comparison therefore requires the entire ₹10 lakh to be available at the outset. In return, the investor gets a predetermined interest rate for the chosen tenure, subject to the terms of the deposit.

What happens to a ₹10,000 SIP over 15 years?

The illustration assumes that an investor puts ₹10,000 into a SIP every month for 15 years. Over that period, the total amount contributed would be ₹18 lakh.

The calculation assumes an annualised return of 12%. On that basis, the estimated gain is ₹32,45,759, taking the projected value of the investment to approximately ₹50,45,759.

The figures demonstrate how regular contributions can accumulate into a substantial corpus over a long period. The projected gain is considerably larger than the amount contributed in the initial years because the calculation assumes that returns remain invested and continue to compound.

However, the 12% figure is an assumed rate for the illustration, not a guaranteed return. Mutual fund performance can fluctuate, and actual returns over 15 years may be higher or lower.

What could ₹10 lakh become in an FD?

The fixed deposit starts with a much larger initial investment of ₹10 lakh. The illustration considers the money remaining invested for 15 years at an assumed annual interest rate of 6.5%.

Under these assumptions, the estimated interest earned over the period is ₹16.3 lakh. The projected value of the deposit at the end of 15 years would therefore be around ₹26.30 lakh.

Unlike the SIP calculation, the FD return is based on a fixed interest rate assumption. This gives the investor greater predictability about the return, although the actual outcome can also depend on factors such as the bank's terms, compounding frequency and the treatment of interest.

The comparison also needs to be viewed carefully because the two investors are not putting the same amount of money into the respective products.

Why the SIP shows a larger projected corpus

At first glance, the difference between the two final values is substantial. The ₹10,000 monthly SIP produces a projected corpus of around ₹50.46 lakh, compared with approximately ₹26.30 lakh for the ₹10 lakh FD.

But the SIP investor contributes ₹18 lakh over 15 years, while the FD investor starts with ₹10 lakh. This means the comparison is not simply a case of investing the same amount in two different products.

The SIP involves a total contribution that is ₹8 lakh higher than the initial FD investment. The projected return also assumes a significantly higher annualised rate of 12%, compared with 6.5% for the FD.

For that reason, the projected ₹50.45 lakh should not be interpreted as evidence that an SIP will always outperform an FD. The outcome depends on the actual mutual fund returns, the FD rate and the respective investment amounts.

SIP offers growth potential, but market risk remains

One of the main attractions of an SIP is the possibility of generating higher long-term returns through market-linked investments. According to investment experts, a long investment horizon can give equity-oriented mutual funds more time to participate in market growth and benefit from compounding.

But higher potential returns come with higher uncertainty. Mutual fund values can fall as well as rise, and there is no guarantee that a fund will deliver 12% annually or even achieve a positive return in every year.

Regular investing can also help investors spread their purchases across different market conditions. However, it does not remove investment risk.

The suitability of an SIP therefore depends on factors such as the investor's financial objective, time horizon and ability to tolerate fluctuations in the value of the investment.

FD prioritises predictability over market-linked growth

Fixed deposits appeal to investors who place greater importance on stability and predictable returns. Since the interest rate is fixed according to the deposit terms, investors can estimate the interest they are expected to earn.

Banks generally offer a range of FD tenures, including shorter and longer periods. The original illustration notes that some banks offer tenures of up to 10 years, while rates can vary significantly depending on the tenure and prevailing interest-rate environment.

For investors who cannot tolerate market volatility, an FD may therefore provide greater comfort. However, the lower assumed return in this example results in a smaller projected corpus than the SIP.

Investors should also consider inflation and taxation when comparing the real value of returns. A fixed return does not necessarily mean the investment will maintain the same purchasing power over a long period.

Which one should investors choose?

There is no universal answer to the SIP versus FD question. The appropriate choice depends on what the money is intended for and how much risk the investor can comfortably accept.

Someone with a long investment horizon and the ability to withstand market fluctuations may consider an SIP as part of a wealth-creation strategy. An investor seeking greater certainty and capital stability may prefer an FD.

The two products can also serve different purposes within the same financial plan. According to financial planners, diversification across suitable investment products can help investors balance growth potential, stability and liquidity rather than relying entirely on one avenue.

The 15-year illustration makes one point clear: ₹10,000 invested every month, with a 12% assumed annual return, could potentially grow to around ₹50.46 lakh. A ₹10 lakh FD earning an assumed 6.5% annually could reach approximately ₹26.30 lakh.

But these are projections based on different investment amounts and return assumptions. The SIP outcome is not guaranteed, while the FD offers greater predictability but a lower assumed rate in this example. Investors should therefore compare risk, returns, tax implications, liquidity and financial goals before deciding where to put their money.

Disclaimer: This article is for informational purposes only and should not be considered investment or financial advice. Mutual fund returns are market-linked and not guaranteed. Fixed deposit rates and terms may vary between institutions and can change over time. Investors should assess their financial goals and risk profile and consult a qualified financial professional before investing.

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