Mutual Fund Strategy: What happens when you combine Rs 1 lakh lump sum with Rs 8,333 monthly SIP?

Mutual Fund SIP and Lump Sum Investment Strategy: Financial planners often suggest using a mix of lump sum and SIP investments in mutual funds, especially for those who have savings from regular income and even get occasional windfalls — such as salary bonuses or sale proceeds. Most experts say that combining an SIP with a lump sum may lead to a more balanced and risk-adjusted outcome for mutual fund investors.

In this article, let’s compare an SIP investment and a lump sum investment of Rs 1 lakh a year each, and compare their returns at 8 per cent, 10 per cent and 12 per cent over the long term, say 15 years. An important caveat to consider here is that these are calculations aimed at elaborating estimated outcomes at the three assumed annualised return rates.

In reality, lump sum and SIP returns may vary drastically in the same mutual fund scheme.

In this example, the investor sets up a monthly SIP of Rs 8,333, which translates to approximately Rs 1 lakh per year, and a Rs 1 lakh one-time investment. Returns from both investments will be calculated over a period of 15 years.

Many money managers argue whether lump sum is better than SIP. While lump sum returns depend heavily on the timing of entry — wherein buying low yields strong returns and vice versa, SIP averages purchase across fluctuating market prices, significantly reduing investment risk in the process.

SIP for discipline and rupee-cost averaging: A regular monthly SIP helps in inculcating investing discipline and smoothening out market volatility over time, while ensuring that investors stay invested regardless of market levels, lump sum enables investors to channelse windfall gains and use corrections to book lower investment costs.

Adding a tactical lump sum layer to an overall investment portfolio comprising a core SIP for regular wealth creation is often seen as helpful, as it enables an investor to benefit from market dips or corrections without disturbing gradual investment growth.

Compounding — or earnings on earnings — enables intermittent returns arising to be reinvested in the initial principal, which leads to accelerated overall investment growth especially over longer periods.

Combining SIPs and lump sum investments is an effective strategy, especially in situations where regular cash flow, say salary income, is accompanied with occasional windfalls like an annual bonus or incentive, say financial planners.

Harshvardhan Roongta, CFP, explains that SIPs provide disciplined, automated investing out of regular cash flow while utilising rupee cost averaging. He also highlights that lump-sum investments, which compounding starts immediately, deliver maximum benefit on large amounts of capital whenever available.

“Using SIPs alongside lump-sum investments is a very practical strategy rather than treating them as mutually exclusive options… To understand why combining them works, you have to look at the structural strengths of both approaches. SIPs, structurally, offer two main advantages: convenience and rupee cost averaging,” Roongta, CEO of Roongta Securities, told Zeebiz.com.

SIPs align seamlessly with your monthly cash flow. As a salaried individual, you do not have to worry about accumulating a large pool of money before investing; you invest automatically as and when your income arrives. “Because you invest a fixed sum at regular intervals, you automatically buy more units when prices drop and fewer when prices rise,” he said.

“With a lump-sum investment, your biggest advantage is that compounding starts immediately on the entire capital,” said Roongta. But, remember, in lump sum investments, the rupee cost averaging does not apply since the transaction happens at a single NAV, he added.

“If you depend purely on a regular monthly salary, there is no practical reason to wait and accumulate money to make a lump-sum investment, so an SIP is the natural choice there… But when you receive a sudden influx of liquidity, such as an annual performance bonus or a one-time financial reward, the dynamic changes because you don’t have to wait until your next salary,” elaborated Roongta.

At that point too, he said, you have two choices for that windfall:

• Systematic Transfer Plan (STP)
• Direct Lump Sum

Both methods have their place, and deploying a lump sum during cash-flow spikes while keeping your regular SIP running gives you the dual benefit.

In STPs, an investor parks the lump sum in a moderate-risk fund and systematically transfers a fixed amount from it into a fund of choice every month to maintain cost averaging. In direct lump sum, the entire amount goes straight into the equity scheme to get immediate exposure and maximize the compounding runway.

“You do not need to choose different or additional fund categories just because you are combining an SIP with a lump sum… You have already made your choice, right? You have selected a fund for SIP… It makes sense to channelise lump sum money into the same planning that you chose the fund with,” said Roongta.

Asset allocation and scheme selection are decided upfront at the financial planning stage based on your specific goal, risk profile and investment horizon. “Let’s say you have an asset allocation of 60 per cent equity to 40 per cent debt… The target of your overall financial plan which best fits your profile remains unchanged regardless of how the money enters the portfolio,” he said.

Financial planners often emphasise that adding entirely new schemes or hunting for special lump-sum categories only creates unnecessary portfolio overlap and clutter without adding much value.

Now, let’s get back to our example.

At the assumed annualised return of 8 per cent, the total investment of Rs 15,99,940 (Rs 14,99,940 in monthly SIPs and Rs 1 lakh in lump sum) will grow to approximately Rs 32,19,977 (SIPs grow to Rs 29,02,760 and lump sum to Rs 3,17,217), calculations show.

At 10 per cent, the SIP portion will appreciate to Rs 34,82,563 while the lump sum will grow to Rs 4,17,725, calculations show.

At a 12 per cent return, a Rs 1 lakh initial investment and a Rs 8,333 monthly SIP will lead to a corpus of approximately Rs 47,51,989, show calculations.

Practically, annualised returns vary in lump sum and SIP modes of investing for a number of reasons. Investors must also consider that although lump sum investments may perform better in a rising market, SIPs outperform lump sum investments in times of market downturn or volatility.

Zeebiz.com studied available data on largecap mutual funds. As of August 20, 18 funds in the category have delivered annualised returns to the tune of 12 per cent or more in 10 years, shows data from industry body AMFI.

The top-performing fund in this category has delivered annualised returns of 14.61 per cent and 15.36 per cent in lump sum and SIP modes, respectively, separate data shows.

To put that into perspective, a Rs 1,000 monthly SIP in the scheme started 10 years ago (total Rs 1.20 lakh invested) has led to a corpus of approximately Rs 2.68 lakh now, show calculations.

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