The Lumpsum Calculator estimates how much a one-time (lumpsum) mutual fund investment could grow to. Enter the amount you invest, the return you expect per year, and how long you stay invested, and it instantly shows the total value at maturity, the estimated returns, and how the amount grows over time.
A lumpsum is a single upfront investment, as opposed to a SIP where you invest monthly. Because the full amount compounds from day one, lumpsum investing can grow strongly over long periods — though it also exposes the whole sum to market timing. Everything runs in your browser.
How to use the lumpsum calculator
- Enter the lumpsum amount you want to invest.
- Set the expected annual return (for example 12% for equity funds).
- Choose how many years you will stay invested.
- Read the maturity value, estimated returns, and the growth-over-time breakdown.
How lumpsum returns are calculated
The calculator uses the compound-interest formula: maturity = principal × (1 + r)ⁿ, where r is the annual return and n is the number of years. All the growth comes from the single amount compounding each year.
Worked example: ₹1,00,000 invested at an assumed 12% for 10 years grows to about ₹3,10,585 — so your ₹1 lakh earns roughly ₹2,10,585 in returns, without you adding anything more.
How ₹1 lakh grows at 12%
The table shows how a one-time ₹1,00,000 investment grows at an assumed 12% annual return. Notice how the gains accelerate the longer you stay invested.
Growth of a ₹1,00,000 lumpsum at 12% p.a. (returns are not guaranteed).
| Years invested | Value |
|---|---|
| 5 years | ₹1,76,234 |
| 10 years | ₹3,10,585 |
| 15 years | ₹5,47,357 |
| 20 years | ₹9,64,629 |
| 25 years | ₹17,00,006 |
Lumpsum vs SIP
A lumpsum puts your entire amount to work immediately, which is powerful in a rising market but risky if you invest just before a fall. A SIP spreads the investment across months, averaging your purchase cost and reducing timing risk. Many investors use a lumpsum for money they already have and a SIP for regular savings.
Frequently Asked Questions
How is lumpsum return calculated?
Using compound interest: maturity = amount × (1 + annual return)^years. For ₹1,00,000 at 12% for 10 years, that is 1,00,000 × 1.12^10 ≈ ₹3,10,585.
Which is better, lumpsum or SIP?
Neither is universally better. A lumpsum benefits from full-time compounding and suits money you already have, while a SIP averages your cost and reduces the risk of investing right before a market fall.
What return should I assume?
Many investors use around 10–12% a year for equity funds as a long-term estimate, but returns are market-linked and never guaranteed. Use a conservative figure you are comfortable with.
Are lumpsum returns guaranteed?
No. Mutual fund returns depend on the market and vary year to year. The maturity value shown is an estimate for planning, not a promise.