New Delhi: Building a Rs 10 lakh investment corpus by the age of 30 or 40 may appear to be the same financial achievement, but the difference in the time available for compounding can be substantial. A hypothetical calculation shows that Rs 10 lakh invested at age 30 could grow to around Rs 3 crore by age 60, while the same amount invested at 40 could reach about Rs 96.46 lakh, assuming an average annual return of 12%.
The comparison highlights one of the most important principles of long-term investing: time can have a significant effect on the eventual value of an investment. The earlier corpus gets an additional decade to generate returns and for those returns to compound further.
However, the 12% annual return used in this illustration is only an assumption. It is not a guaranteed or promised return, particularly when discussing market-linked investments.
Rs 10 lakh at 30 versus Rs 10 lakh at 40
Consider two investors, both of whom have accumulated Rs 10 lakh. The first reaches that milestone at 30, while the second does so at 40.
If both leave the entire Rs 10 lakh invested and achieve an assumed average annual return of 12%, the first investor has 30 years until age 60. The second has only 20 years.
The resulting calculations are:
| Investment age | Investment | Period to age 60 | Assumed annual return | Estimated returns | Corpus at 60 |
|---|---|---|---|---|---|
| 30 | Rs 10 lakh | 30 years | 12% | Rs 2.9 crore | Rs 3 crore |
| 40 | Rs 10 lakh | 20 years | 12% | Rs 86.46 lakh | Rs 96.46 lakh |
The difference between the two estimated final corpuses is more than Rs 2 crore. Neither investor makes additional contributions in this illustration. The difference comes entirely from the extra 10 years available for the first corpus to compound.
Why an extra decade matters
Compounding occurs when investment returns remain invested and generate further returns. As the corpus becomes larger, the returns are calculated on a progressively bigger base.
For example, a 12% return on Rs 10 lakh represents Rs 1.2 lakh in a year under the simple assumption used in the illustration. If the returns remain invested, the following year’s growth is calculated on the larger accumulated amount.
Over several decades, this can create a substantial difference between investments that start at different ages.
The investor who reaches Rs 10 lakh at 30 therefore has more time for the original capital and accumulated gains to participate in this compounding process. The investor who reaches the same Rs 10 lakh at 40 begins with the same amount but has 10 fewer years before reaching age 60.
The Rs 3 crore figure is not a guaranteed return
The projected Rs 3 crore figure should not be interpreted as a guaranteed outcome.
The calculation assumes a steady 12% annual return for three decades. Actual returns from mutual funds and other market-linked investments can vary from year to year and may be significantly different from the assumed rate.
Market conditions, asset allocation, investment costs, taxation and the investor’s choice of financial product can all affect the actual final corpus.
Therefore, the calculation is primarily useful for demonstrating the mathematical impact of time and compounding rather than forecasting what an investor will definitely earn.
What happens if investors continue with SIPs?
The comparison also changes when regular investments are added.
The NDTV Profit illustration assumes that neither investor makes additional contributions after reaching the initial Rs 10 lakh. In real life, investors often continue investing through monthly SIPs or other regular contributions.
If the 30-year-old continues making SIP investments after building the initial corpus, the eventual wealth could be substantially higher than the Rs 3 crore figure in the illustration.
Similarly, an investor who reaches Rs 10 lakh at 40 can continue making regular contributions. Additional investments can help narrow some of the difference created by having fewer years for the original corpus to compound.
This is why the comparison should not be viewed simply as a race between investors of different ages. Income, expenses, debt, family responsibilities and career progression can determine when a person is able to accumulate their first Rs 10 lakh.
Starting at 40 does not end wealth creation
Reaching the Rs 10 lakh milestone at 40 does not mean that long-term wealth creation is no longer possible.
The key difference is the amount of time available. Someone beginning at 40 may need to consider a combination of regular contributions, an appropriate investment strategy and a realistic financial goal based on their remaining investment horizon.
The shorter period may require higher contributions to reach the same target that an earlier investor could potentially achieve with a longer compounding period.
For example, the two investors in the illustration have the same initial corpus, but the younger investor has a 30-year runway to age 60. The older investor has only 20 years. That difference in time is what drives the large gap in the hypothetical final values.
The lesson is about time, not a fixed age
There is no universal age at which everyone must have Rs 10 lakh invested. Financial circumstances differ widely, and people may have different income levels, responsibilities and financial goals.
The calculation instead demonstrates how the time available to an investment can influence the effect of compounding.
A Rs 10 lakh corpus accumulated earlier gets more years to potentially grow, while the same corpus accumulated later has a shorter period to compound. Investors should therefore consider both the amount they can invest and the length of time they can remain invested.
Ultimately, the figures of Rs 3 crore and Rs 96.46 lakh are hypothetical outcomes based on a 12% annual return assumption. Actual investment performance can differ. The broader principle remains that allowing money more time to compound can materially affect long-term wealth accumulation.