Mumbai: Investors often debate whether a monthly Systematic Investment Plan (SIP) or a one-time lumpsum investment is better for long-term wealth creation. A comparison over 20 years shows that a Rs 10 lakh lumpsum could build a slightly larger corpus than a Rs 10,000 monthly SIP under a 12% annual return assumption, despite the SIP requiring a much higher total investment.

According to a calculation published by NDTV Profit, a Rs 10,000 monthly SIP maintained for 20 years would involve a total investment of Rs 24 lakh. At an assumed annual return of 12%, the investment could grow to an estimated Rs 91.99 lakh, including approximately Rs 67.99 lakh in returns.

By comparison, a Rs 10 lakh lumpsum invested for the same 20-year period at 12% could grow to approximately Rs 96.46 lakh. The estimated returns would be around Rs 86.46 lakh.

SIP investment: Rs 24 lakh invested over 20 years

Under the SIP approach, an investor contributes Rs 10,000 every month. Over 20 years, the total contribution reaches Rs 24 lakh.

Assuming a 12% average annual return, the estimated maturity value is about Rs 91.99 lakh. Of this, approximately Rs 67.99 lakh would represent estimated investment gains, while Rs 24 lakh would be the investor’s total contribution.

The major advantage of an SIP is that investors do not need a large amount of money at the beginning. A person with a regular salary can allocate a fixed amount every month and gradually build a substantial portfolio.

SIPs can also encourage financial discipline because the investment happens automatically at regular intervals. This makes the strategy suitable for investors who may not have Rs 10 lakh available in one go.

Rs 10 lakh lumpsum gets more time to compound

The lumpsum approach works differently. Here, the investor puts the entire Rs 10 lakh into the investment at the beginning of the 20-year period.

At an assumed 12% annual return, the Rs 10 lakh could grow to approximately Rs 96.46 lakh after 20 years. The estimated gain would be Rs 86.46 lakh.

The key reason for the difference is the time available for compounding.

When Rs 10 lakh is invested upfront, the entire amount gets the opportunity to participate in market growth from the beginning. In contrast, a SIP spreads the investment across 240 monthly instalments.

The first SIP instalments remain invested for nearly the entire period, but later instalments have progressively less time to generate returns. The final Rs 10,000 instalment, for example, is invested for only a very short period before the 20-year horizon ends.

Lumpsum requires larger upfront capital

While the mathematical comparison favours the lumpsum under the stated assumptions, investors need to consider the practical challenge of arranging Rs 10 lakh at once.

For someone who already has Rs 10 lakh available for investment and has a long investment horizon, putting the money to work earlier can provide greater exposure to compounding.

However, investors should not assume that a 12% return will actually be delivered every year. Equity-oriented mutual funds are market-linked investments, and actual returns can vary significantly depending on market conditions.

The comparison is therefore an illustration rather than a guarantee of future wealth.

SIP offers flexibility for salaried investors

A monthly SIP can be more practical for investors who earn a regular salary and want to invest from their monthly income.

Instead of waiting until they accumulate a large amount, investors can start with Rs 10,000 and continue investing over the long term. This approach also reduces the need to make a single large investment decision.

For many investors, consistency can be more important than trying to identify the perfect time to invest.

An SIP also allows investors to increase their contributions as their income rises. A higher monthly contribution over time can potentially result in a substantially larger corpus.

Which strategy could create more wealth?

Under the specific assumptions used in the calculation, the Rs 10 lakh lumpsum produces a slightly higher final corpus of approximately Rs 96.46 lakh compared with Rs 91.99 lakh for the Rs 10,000 monthly SIP.

However, the comparison is not completely equal from a cash-flow perspective. The SIP investor contributes Rs 24 lakh over 20 years, while the lumpsum investor puts in only Rs 10 lakh at the beginning.

The result highlights the importance of when money is invested, not just how much is eventually invested.

The lumpsum gets the advantage of having the entire capital invested from day one, allowing the full Rs 10 lakh to compound throughout the 20-year period.

A blended approach may also work

Investors do not necessarily have to choose between an SIP and lumpsum investment.

Those with regular income can maintain a monthly SIP, while investors who receive bonuses, inheritances or other surplus funds can consider deploying additional money based on their financial goals and risk profile.

NDTV Profit also notes that maintaining diversification, reviewing asset allocation and staying invested for the long term can be more important than attempting to identify the perfect market entry point.

Ultimately, the better strategy depends on an investor’s income, available capital, risk tolerance, financial goals and investment horizon. The 12% return assumption used in this comparison is only an illustration and should not be treated as a guaranteed return.