What is a lumpsum investment?
A lumpsum is a single one-time investment, as opposed to a SIP where you invest a fixed amount regularly. This calculator estimates how that one-time amount may grow.
Investments calculator
Lumpsum Investment Calculator India
Estimate what a one-time lump-sum investment could grow to with annual compounding, see the gain and inflation-adjusted real value, compare cautious and optimistic scenarios, or work backwards from a future target.
Interactive calculator
See what a one-time investment can grow to
Estimate the future value of a lump sum, its real value after inflation, and a cautious-to-optimistic range. Returns are an assumption and are not guaranteed.
Limitations
- Returns are an assumption, not a guarantee; real returns vary and can be negative.
- Uses annual compounding; actual products may compound differently.
- Taxes, charges, and exit loads are not included.
- Scenarios use a fixed 3-point band and are illustrative, not predictions.
Year-by-year projection
Estimated value and gain at the end of each year at the expected return.
| Period | Estimated value | Estimated gain |
|---|---|---|
| Year 1 | ₹1,12,000 | ₹12,000 |
| Year 2 | ₹1,25,440 | ₹25,440 |
| Year 3 | ₹1,40,493 | ₹40,493 |
| Year 4 | ₹1,57,352 | ₹57,352 |
| Year 5 | ₹1,76,234 | ₹76,234 |
| Year 6 | ₹1,97,382 | ₹97,382 |
| Year 7 | ₹2,21,068 | ₹1,21,068 |
| Year 8 | ₹2,47,596 | ₹1,47,596 |
| Year 9 | ₹2,77,308 | ₹1,77,308 |
| Year 10 | ₹3,10,585 | ₹2,10,585 |
What to do next
Continue your decision
Formula, example, assumptions, and FAQs — open any section for the detail.
Formula
Future value with annual compounding
Future value = P × (1 + r ÷ 100)^tP is the lump sum, r is the annual return, and t is the duration in years (months ÷ 12). Interest compounds once a year. At 0% the future value equals the amount invested.
Gain and real value
Gain = future value − P · Real value = future value ÷ (1 + inflation ÷ 100)^tThe gain is the growth above the invested amount. The real value restates the future amount in today’s money so you can judge its actual buying power.
Cautious and optimistic scenarios
Cautious = P × (1 + (r − 3) ÷ 100)^t · Optimistic = P × (1 + (r + 3) ÷ 100)^tThe same investment is recomputed 3 percentage points below and above the expected return to show a realistic range instead of a single number.
Target mode (reverse)
Required lump sum = target × (1 + inflation ÷ 100)^t ÷ (1 + r ÷ 100)^tThe target is first adjusted for inflation, then discounted back to today at the expected return to find the one-time amount needed now.
Worked example
Example: ₹1,00,000 for 10 years at 12%
Someone invests ₹1,00,000 once and leaves it for 10 years, assuming a 12% annual return and ignoring inflation.
Calculation:Future value = 1,00,000 × 1.12^10 ≈ ₹3,10,585, a gain of about ₹2,10,585. A cautious 9% gives about ₹2,36,736 and an optimistic 15% about ₹4,04,556.
Result:The lump sum could grow to roughly ₹3,10,585 in 10 years under a 12% assumption, with a realistic range of about ₹2,36,736 to ₹4,04,556. If 6% inflation is applied, that ₹3,10,585 is worth about ₹1,73,429 in today’s money. Returns are not guaranteed.
Assumptions
- Interest compounds once a year; the duration is converted to years (months ÷ 12).
- The expected return is a constant assumption for the whole period, and real returns vary.
- Cautious and optimistic scenarios use 3 percentage points below and above the expected return.
- The real value uses the entered inflation rate; in target mode the goal is adjusted for inflation first.
- Taxes, charges, and product-specific rules are not included.
- Results are rounded to whole rupees and are an estimate, not a guarantee or financial advice.
Common mistakes
- Treating the expected return as guaranteed instead of an assumption.
- Ignoring inflation, so the future amount looks larger than its real buying power.
- Comparing lumpsum and SIP outcomes without noting that a SIP invests gradually, not all at once.
- Using an unrealistically high return and over-estimating the result.
- Forgetting that taxes and charges can reduce the actual gain.
- Assuming a single number is certain instead of looking at the cautious-to-optimistic range.
Accuracy notes
Future value uses annual compounding and amounts are rounded to whole rupees. Months are converted to years by dividing by 12. Returns and inflation are assumptions, scenarios use a fixed 3-point band, and real outcomes will vary with markets, compounding, taxes, and charges.
Frequently asked questions
How is the future value calculated?
It uses annual compounding: future value = amount × (1 + return ÷ 100) raised to the number of years. At a 0% return the future value equals the amount invested.
What does the real value mean?
The real value restates the future amount in today’s money using the inflation rate, so you can see its actual buying power rather than just the nominal figure.
Lumpsum or SIP — which is better?
They suit different situations. A lumpsum invests everything at once; a SIP spreads investments over time and can reduce the effect of timing. This tool does not recommend either; compare both with the SIP Calculator.
What return should I assume?
Use a figure that matches your chosen option and risk comfort. A fixed deposit return is more conservative than an equity-linked assumption. The cautious and optimistic scenarios show a range around your figure.
How does target mode work?
Enter the future amount you want and the calculator works backwards, adjusting for inflation and discounting at the expected return, to estimate the one-time amount you would need to invest today.
Are returns guaranteed?
No. Market-linked returns vary and can be lower or negative. This is a planning estimate, not a promise, and not financial advice.
Why might my actual amount differ?
Real returns are not constant, compounding frequency can differ, and taxes and charges reduce the net amount. Treat the result as a guide and review it over time.
This calculator provides a general estimate for planning and education only. It is not financial advice or a recommendation of any product, and returns are not guaranteed. Actual outcomes depend on your investment choice, market conditions, inflation, taxes, and charges.Read the full disclaimer.