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# Mutual funds: How SIPs and STPs may help you build a robust portfolio
- URL: https://clink.ghost.io/mutual-funds-how-sips-and-stps-may-help-you-build-a-robust-portfolio/
- Published: 2026-11-02T08:55:49.000Z
- Updated: 2026-11-02T08:55:49.000Z
- Description: A systematic transfer plan (STP) allows investors to temporarily park their money in one mutual fund before gradually transferring it to another.
- Author: Vimal Chander Joshi
- Tags: mutual funds, money, investment, personal finance

Building a mutual fund portfolio requires more than simply identifying the right schemes. Equally important is deciding when and how to invest.

Investors who put a large amount of money into equity mutual funds at elevated market valuations risk entering the market at an unfavourable time. One way to minimise this timing risk is to spread investments across different market levels rather than investing the entire amount at once.

This approach, known as rupee cost averaging, can be implemented through a systematic investment plan (SIP).

## How do SIPs help investors?

An SIP is an investment facility through which a mutual fund investor authorises the fund house to deduct a predetermined amount from their bank account at regular intervals and invest it in a chosen scheme. The frequency could be weekly, monthly or at other intervals offered by the fund house.

Consider an investor who wants to invest ₹5 lakh in a mid-cap mutual fund. However, the investor's wealth adviser cautions against making a lump-sum investment because mid-cap stocks are trading at relatively high valuations.

At the same time, the investor does not want to miss out on potential market gains if valuations improve or stock prices rise.

One way to approach this situation is to divide the ₹5 lakh investment into smaller instalments through an SIP. For instance, the investor could deploy ₹50,000 every month over 10 months.

This allows the investor to accumulate mutual fund units at different NAV levels rather than committing the entire amount at one particular market level. Consequently, the purchase cost gets averaged out over the investment period.

"Trying to time the market is not what allows you to create long-term wealth, whereas it's how much time you were invested in the market. So, one should focus on being invested for as long as possible. And the best way to do this is through an SIP," says Preeti Zende, founder of Apna Dhan Financial Services.

## How are capital gains taxed on SIP investments?

Investors should also understand how capital gains are calculated when they redeem mutual fund units accumulated through SIPs.

The applicable principle is first-in, first-out (FIFO). Under this method, the units purchased first are treated as the first ones redeemed. Since each SIP instalment represents a separate purchase, the holding period of individual units is calculated independently.

This distinction is important because the holding period determines whether the gains qualify as short-term or long-term capital gains.

For equity-oriented mutual funds, gains on units held for more than 12 months qualify as long-term capital gains. For other mutual funds, the applicable holding period and tax treatment depend on the fund's classification and the prevailing income-tax rules.

## How does a systematic transfer plan (STP) work?

While an SIP helps investors spread their purchases over time, a systematic transfer plan (STP) serves a different purpose. It allows investors to park a lump sum in one mutual fund scheme and systematically transfer predetermined amounts to another scheme at regular intervals.

Consider the earlier example of an investor planning to deploy ₹5 lakh in a small-cap mutual fund. Given the elevated valuations in the segment, the investor decides to spread the investment over 10 months, transferring ₹50,000 every month.

Instead of keeping the uninvested amount idle in a savings account, the investor could park it in a suitable debt mutual fund and set up an STP to transfer money periodically into the small-cap scheme.

This way, the money awaiting deployment remains invested in the source fund, potentially generating returns during the transfer period. The investor can gradually build exposure to the target equity fund without investing the entire amount at once.

However, returns from debt mutual funds are not guaranteed, and investors should consider their risk profile, taxation and the possibility of fluctuations in the source fund's NAV.

## Why combine SIPs and STPs?

For investors deploying a substantial amount into equity mutual funds, combining the two strategies can offer a structured approach to investing.

An STP facilitates the gradual transfer of money from a source fund to a preferred equity scheme, while the staggered purchases help average the acquisition cost across different market levels. Meanwhile, the untransferred balance remains invested in the source scheme, potentially earning returns.

Ultimately, disciplined investing and careful planning are important components of long-term wealth creation. Rather than attempting to predict market movements, investors can use SIPs and STPs to build their portfolios gradually in line with their financial goals and risk appetite.