Want Rs 10 crore for retirement in 20 years? How much you should SIP every month

The dream of building a Rs 10 crore retirement corpus by age 50 can become achievable for a 30-year-old but only with an early start, a sizable monthly investment and the discipline to keep increasing it as income grows.

Under the 12% annual return scenario, an investor can begin with a monthly SIP of Rs 53,700, provided the contribution is increased by 10% every year for 20 years. Without an annual step-up, the required monthly SIP rises to Rs 1,08,700.

The target becomes more demanding when inflation is explicitly factored in. Using a 7% inflation-adjusted return, ZFunds estimates that the investor must either contribute a fixed Rs 1.98 lakh every month or start with Rs 85,000 and raise the SIP by 10% annually. The wide range shows how return assumptions, inflation and the ability to step up contributions ultimately determine whether the Rs 10 crore goal remains a dream or becomes a workable financial plan.

The Monthly SIP Needed for Rs 10 Crore

Nilesh D Naik, head of mutual funds at PhonePe, calculates that the required SIP varies substantially across return assumptions.

At an expected annualised return of 8%, an investor would need a fixed monthly SIP of Rs 1,74,600 to accumulate Rs 10 crore over 20 years. Alternatively, the investor could begin with Rs 77,300 a month and increase the SIP by 10% every year.

If the portfolio delivers a 10% annualised return, the required fixed SIP falls to Rs 1,38,100 a month. Under the step-up approach, the investor can start with Rs 64,700 monthly and raise the contribution by 10% annually.

At a 12% annualised return, the target could be reached with a fixed monthly SIP of Rs 1,08,700. With a 10% annual step-up, the starting SIP falls further to Rs 53,700 a month. All amounts have been rounded to the nearest Rs 100.

What Happens After Accounting for Inflation?

The ZFunds Research Team uses a more conservative framework based on inflation-adjusted returns.

It assumes markets may deliver an average return of about 12% annually, while inflation erodes roughly 5%. That leaves an estimated real return of about 7%, the rate it says should underpin the retirement plan.

Under this assumption, the investor has two options: Invest a fixed Rs 1.98 lakh every month for 20 years or start with Rs 85,000 a month and increase the SIP by 10% annually.

With the fixed Rs 1.98 lakh SIP, the inflation-adjusted investment value is estimated to reach approximately Rs 1.41 crore after five years, Rs 3.39 crore after 10 years and Rs 6.15 crore after 15 years. It crosses Rs 10 crore at the end of 20 years.

The step-up plan grows more slowly initially because of the lower starting contribution. Its estimated value reaches Rs 73.2 lakh after five years, Rs 2.20 crore after 10 years and Rs 4.97 crore after 15 years before crossing Rs 10 crore in year 20.

The comparison demonstrates how step-up SIPs shift a greater part of the investment burden into later years. They make the goal more accessible today but require the investor’s earnings and willingness to invest to keep rising.

How Should the SIP Be Allocated?

For an aggressive investor with a 20-year horizon, ZFunds recommends allocating the entire portfolio to equity mutual funds.

It suggests investing 55% in flexi-cap or multi-cap funds, giving fund managers the flexibility to move between large, mid-sized and smaller companies as opportunities change.

Another 35% can be allocated to mid-cap and small-cap funds. These categories carry greater volatility but provide exposure to smaller, faster-growing businesses over the long investment horizon.

The remaining 10% can go into thematic funds focused on areas such as innovation, manufacturing or defence. Keeping the thematic allocation limited is intended to provide additional upside without allowing prolonged weakness in a particular theme to derail the core portfolio.

Naik takes a more guarded approach. He recommends that flexi-cap, large-and-midcap or value funds form the core equity allocation, with more aggressive categories such as small-cap funds used tactically when valuations are favourable.

He also argues that even aggressive investors should retain some exposure to relatively safer assets such as fixed income. Such an allocation can help manage volatility and provide capital to increase equity exposure when valuations become attractive.

“Investors often overestimate their risk appetite, which can lead to emotionally driven investment decisions, especially during sharp corrections or bear markets,” Naik said.

The contrasting approaches underline that a 20-year horizon alone doesn’t determine the ideal asset allocation. An investor’s ability to remain invested through deep market declines is equally important.

Role of Fund Selection

Both the fixed and step-up plans depend on sustained execution over two decades. Missing contributions, failing to increase the SIP or abandoning equity during market declines can alter the outcome even if the initial calculations are sound.

“The single biggest factor in reaching your goal isn't which fund you pick, it's how much you invest, and whether you keep investing every single month for 20 years without breaking the habit,” the ZFunds Research Team said.

It recommends automating SIPs and increasing contributions whenever salary hikes or bonuses provide additional room. The portfolio should be spread across three asset management companies, while the total number of schemes should generally be limited to four to six.

Adding more funds can increase complexity without providing meaningful diversification, particularly when schemes hold overlapping portfolios. Investors should also avoid selecting funds purely because they topped the performance charts during the previous year. Consistency across both strong and weak market phases is a more useful indicator, according to ZFunds.

Ultimately, the Rs 10 crore target is achievable under each of the scenarios but only with different combinations of starting capital, annual increases and assumed returns. The lower the return assumption and the greater the protection sought against inflation, the higher the required monthly commitment.

As ZFunds put it: “In investing, showing up every month, for years on end, beats being clever.”

(Disclaimer: Recommendations, suggestions, views and opinions given by the experts are their own. These do not represent the views of Economic Times)