Lumpsum Investment Calculator
A lumpsum investment puts your entire amount to work in one go, so it compounds for the full time horizon. This calculator shows how a single deposit grows, separating the maturity value into your original capital and the returns that compounding added — for any currency.
- Invested
- Returns
- Amount invested
- $100,000.00
- Estimated returns
- $210,584.82
- Maturity value
- $310,584.82
A one-time investment of 100,000 grows to 310585 over 10 years at 12% — about 3.11× your starting capital, with returns making up 68% of the final value.
Ways to optimize
Real what-if scenarios calculated from your numbers.
Scenarios use the exact same math as the calculator — no estimates.
How it works
Unlike a SIP, where money trickles in month after month, a lumpsum is invested all at once on day one. Every unit of capital therefore enjoys the maximum possible compounding window. The growth is exponential: returns earn returns, so the later years of the horizon add far more in absolute terms than the early ones.
This tool compounds annually, which is the convention for projecting equity and mutual-fund returns. The expected return is an assumption drawn from long-run averages — real markets rise and fall, so treat the smooth curve as the average outcome rather than a fixed path. Use the currency switcher at the top to see the figures in your own.
M = P · (1 + r)^t, where P = invested amount, r = expected annual return (as a decimal), and t = years. Returns are compounded once a year. Estimated returns = M − P.
Worked example
Invest a lumpsum of 100,000 at an expected 12% annual return for 10 years. Using M = 100,000 · (1.12)^10, the investment grows to about 310,585. Of that, your original 100,000 is capital and roughly 210,585 is returns — your money has grown to about 3.11× its starting value, with returns making up about 68% of the final corpus.
Things to watch out for
A 0% return simply returns your capital with no growth. Because a lumpsum is fully invested from day one, it is more exposed to entry-point timing than a SIP — investing a large sum just before a market drop can dent returns for years, which is why some investors stagger a big amount over a few months. The tool assumes a constant annual return; a real sequence of volatile years that averages the same rate will usually end at a slightly different number. It also ignores expense ratios, exit loads, and taxes, which reduce the realised return.
Frequently asked questions
Is a lumpsum better than a SIP?+
Neither is universally better. A lumpsum maximises the compounding window and tends to win when markets rise steadily, but it is fully exposed to the price on the day you invest. A SIP averages your entry price and reduces timing risk. The right choice depends on the cash you have and your comfort with short-term swings.
Why compound annually rather than monthly?+
Annual compounding is the standard convention for projecting equity and mutual-fund returns, where the quoted figure is an annual rate. For bank deposits that state a compounding frequency, use the compound interest calculator instead.
Is the expected return guaranteed?+
No. It is an assumption based on historical averages. Actual returns vary and can be negative in any single year. The result is an estimate of the average outcome, not a promise.
Can I use this for any currency?+
Yes — the formula is identical everywhere. Switch the currency at the top of the page to view your numbers.
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Disclaimer: This calculator is for educational and informational purposes only and provides estimates, not financial advice. Interest rates, taxes, fees, and local rules vary and change over time. Confirm figures with a qualified professional before making any financial decision.
Last reviewed: 2026-06-22