Lumpsum Calculator
When you have a windfall — a bonus, an inheritance, or matured savings — investing it as a lump sum can let compounding work on the full amount from day one. This lumpsum calculator estimates how that single investment grows. Enter the amount, the return you expect, and the number of years, and it shows the maturity value along with how much of that is your original capital versus accumulated returns. Because the entire sum compounds for the full period, lump-sum investing can outperform a SIP when markets rise steadily, though it carries more timing risk. Use the calculator to set realistic expectations and to compare a one-time investment with spreading the money out over time.
Total Value
₹3,10,585
Invested
₹1,00,000
Est. Returns
₹2,10,585
About the Lumpsum Calculator
A lumpsum calculator estimates the future value of a single, one-time investment compounded at an assumed annual rate. Unlike a SIP, there are no further contributions — growth comes purely from compounding on the initial amount.
Why it is useful
A lump sum invested today has more time to compound than money added later, so the difference between starting now and waiting a few years can be large. This tool quantifies that, helping you decide whether to deploy a windfall at once, stagger it, or hold it for a goal.
How the calculation works
The calculator applies the compound-growth formula FV = P × (1 + r)^n, where P is the amount invested, r is the annual rate of return, and n is the number of years. The result is your projected maturity value; subtracting P gives the total gain.
Key inputs explained
- Investment amount: The one-time sum you invest today.
- Expected return: The assumed annual return rate.
- Time period: How many years the money stays invested.
Example calculation
Inputs
- Investment amount
- ₹5,00,000
- Expected return
- 12% p.a.
- Period
- 10 years
Calculation breakdown
- Growth factor
- (1.12)^10 ≈ 3.106
- FV formula
- 5,00,000 × 3.106
- Gain
- 15.53 lakh − 5 lakh
Your ₹5 lakh more than triples to about ₹15.5 lakh in 10 years, with roughly ₹10.5 lakh coming purely from compounding — no additional investment required.
Benefits
- The full amount compounds from day one.
- Simple to track — a single investment, no monthly admin.
- Can outperform a SIP in steadily rising markets.
Limitations
- Timing risk — investing just before a market fall hurts more.
- Assumes a steady return; real markets are volatile.
- Ignores expense ratios, exit loads, and taxes on gains.
Tips
- For large sums in volatile markets, consider staggering via an STP.
- Match the tenure to a goal so you are not forced to sell in a downturn.
- Reinvest gains rather than withdrawing them to keep compounding.
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About this calculator
The Lumpsum Calculator is built and maintained by the PaisaBot team. All calculations run instantly in your browser using established financial formulas, and we use high-precision arithmetic to keep the results reliable.
Data accuracy: Interest rates, tax slabs, and scheme rules are updated periodically, but figures can change with RBI, government, and lender revisions. Always confirm the latest rates with your bank or an official source before acting.
Educational purpose: This tool is provided for general information and financial education only. It does not constitute investment, tax, or legal advice. For decisions specific to your situation, please consult a qualified financial advisor.