Start with the target, not the investment
A lumpsum goal calculation asks the opposite question from a normal future-value calculator. Instead of asking what ₹10 lakh might become, it asks how much needs to be invested today so that the future value reaches a specific goal.
At a constant assumed return, the present-value relationship is straightforward:
Required lumpsum today = future target ÷ (1 + assumed return)^years
That simplicity is useful, but it also makes the result highly sensitive to the two assumptions people are most likely to underestimate: time and return.
Worked examples for ₹50 lakh and ₹1 crore
The table below assumes no existing investment and no inflation adjustment.
| Horizon | 8% return: ₹50 lakh | 10% return: ₹50 lakh | 12% return: ₹50 lakh | 10% return: ₹1 crore |
|---|---|---|---|---|
| 5 years | ₹34.03 lakh | ₹31.05 lakh | ₹28.37 lakh | ₹62.09 lakh |
| 10 years | ₹23.16 lakh | ₹19.28 lakh | ₹16.10 lakh | ₹38.55 lakh |
| 15 years | ₹15.76 lakh | ₹11.97 lakh | ₹9.13 lakh | ₹23.94 lakh |
| 20 years | ₹10.73 lakh | ₹7.43 lakh | ₹5.18 lakh | ₹14.86 lakh |
The biggest lesson is not that 12% is “better” than 8%. It is that the amount you need today depends enormously on how much future growth you assume. A plan that works only at the highest-return assumption is fragile.
Existing investments should reduce the gap
Suppose the goal is ₹1 crore in 15 years, you assume 10%, and you already have ₹5 lakh earmarked for that goal. If that ₹5 lakh compounds at the same assumed return, it would grow to about ₹20.9 lakh. The new lumpsum does not need to fund the whole ₹1 crore — only the remaining future gap.
That is why the calculator asks for existing investments separately instead of telling users to manually subtract today’s balance from a future target.
Inflation changes the meaning of a round-number goal
A target such as ₹1 crore can mean two different things:
- ₹1 crore nominally in the future, or
- the future amount needed to preserve the purchasing power of ₹1 crore today.
At 6% inflation, preserving today’s ₹1 crore purchasing power for 15 years would require a future target of roughly ₹2.40 crore. That is a radically different planning problem.
Use a three-scenario planning range
A practical way to avoid false precision is to test three cases:
| Scenario | Return assumption | What it is for |
|---|---|---|
| Conservative | lower than your base case | tests whether the goal still works under weaker returns |
| Base | your central planning assumption | day-to-day planning |
| Higher return | above base | shows upside, not a guarantee |
The calculator makes this comparison visible instead of hiding the sensitivity behind one headline number.
Lumpsum versus SIP is a cash-flow question too
If the required lumpsum is larger than the capital you actually have today, that does not mean the goal is impossible. It means a monthly funding approach may be more appropriate.
Frequently asked questions
Does this calculator guarantee the target will be reached?
No. It shows the amount implied by your selected return and inflation assumptions. Actual investment returns vary.
Should I assume the highest historical return I can find?
No. A goal plan should remain workable under a reasonable range of outcomes rather than depending on an optimistic single number.
Can I use this for ₹25 lakh, ₹2 crore or ₹5 crore?
Yes. The underlying calculation is target-agnostic, which is why Finpockett does not create separate pages for every round-number goal.
Should I include emergency savings as existing corpus?
Only if you genuinely intend to spend that money on this goal. Otherwise it overstates how well-funded the goal is.