# Lumpsum Calculator

> A lumpsum grows as amount × (1 + annual return)^years, so ₹1 lakh invested at 12% a year for 10 years becomes about ₹3,10,585, or ₹1,73,429 in today's money if prices rise 6% a year. The calculator also compares it with the same ₹1 lakh invested through a monthly SIP.

- Interactive calculator: https://calculatorswithsteps.com/lumpsum-calculator
- Category: India Finance Calculators
- Last updated: 2026-11-10
- Publisher: Calculators With Steps (calculatorswithsteps.com)

## How to use the lumpsum calculator

1. **One-time investment** – the amount you invest once.
2. **Expected return** – the yearly return you assume. Use a cautious figure, since equity returns are never guaranteed.
3. **Time period** – how many years you will stay invested.
4. **Inflation** (optional) – shows what the final amount is worth in today's rupees. Set it to 0 to skip.

You get the maturity value, the gain, a wealth multiple, the inflation-adjusted value and a side-by-side figure for investing the same amount through a monthly SIP. A chart and a table show the value at the end of every year.

## Lumpsum formula

**FV = P × (1 + r)^t**

- **FV** = future value
- **P** = amount invested today
- **r** = expected annual return ÷ 100
- **t** = number of years

To express it in today's money, divide by the inflation factor: **real value = FV ÷ (1 + i)^t**, where i is the inflation rate. This is the same compound growth formula behind a CAGR. If you already know the start and end values, the [CAGR calculator](https://calculatorswithsteps.com/cagr-calculator) works backwards to the return.

## Worked example

₹1,00,000 invested once at 12% a year for 10 years:

- FV = 1,00,000 × (1.12)^10 = 1,00,000 × 3.1058 = **₹3,10,585**
- Gain = **₹2,10,585**, or 3.11 times your money
- At 6% inflation, ₹3,10,585 in 10 years has the buying power of **₹1,73,429** today

| ₹1 lakh invested once | 8% a year | 10% a year | 12% a year |
| --- | --- | --- | --- |
| After 5 years | ₹1,46,933 | ₹1,61,051 | ₹1,76,234 |
| After 10 years | ₹2,15,892 | ₹2,59,374 | ₹3,10,585 |
| After 20 years | ₹4,66,096 | ₹6,72,750 | ₹9,64,629 |

Doubling the time from 10 to 20 years more than triples the result at 12%, because the gains of the first decade compound in the second. ₹5 lakh at 12% for 15 years grows to ₹27,36,783.

## Lumpsum vs SIP

Investing ₹1 lakh as a lump sum and investing it as a SIP of ₹833 a month over the same 10 years give very different answers at the same 12% return:

| ₹1 lakh over 10 years at 12% | Maturity value |
| --- | --- |
| Lump sum on day one | ₹3,10,585 |
| SIP of ₹833 a month for 120 months | ₹1,93,616 |

The lump sum wins on paper because every rupee is invested for the full 10 years, while the average SIP rupee is invested for only about 5. But that assumes a smooth return. In real markets, a lump sum invested just before a crash can take years to recover, while a SIP keeps buying at lower prices. Many investors with a large sum park it in a liquid or debt fund and move it into equity through a systematic transfer plan (STP) over 6 to 12 months. Model a regular monthly plan with the [SIP calculator](https://calculatorswithsteps.com/sip-calculator).

## Choosing a return assumption

There is no guaranteed rate for market-linked investments. A cautious range for planning is 10% to 12% a year for diversified equity funds over long periods, 7% to 8% for hybrid funds and 6% to 7% for debt funds. For a guaranteed return, compare a [fixed deposit](https://calculatorswithsteps.com/fd-calculator) or [PPF](https://calculatorswithsteps.com/ppf-calculator), and always check the result against inflation with the [inflation calculator](https://calculatorswithsteps.com/inflation-calculator).

## Tips for lumpsum investors

- **Match the fund to the time frame.** Equity funds suit money you will not need for 7 years or more.
- **Do not chase last year's returns.** A fund that rose 40% last year is not more likely to repeat it.
- **Mind taxes and costs.** Capital gains tax, exit loads and the expense ratio all reduce the final amount, and this calculator ignores them.
- **Review once a year** and rebalance if one asset has grown far beyond its share of your portfolio.

## Frequently asked questions

### What is a lumpsum investment?

A lumpsum investment is money invested all at once, such as putting a bonus, an inheritance or the proceeds of a sale into a mutual fund in a single transaction. It is the opposite of a SIP, where you invest a fixed amount every month.

### How is lumpsum return calculated?

Use FV = P × (1 + r)^t, where P is the amount invested, r is the expected annual return as a decimal and t is the number of years. ₹1 lakh at 12% for 10 years gives 1,00,000 × 1.12^10 = ₹3,10,585.

### How much will ₹5 lakh grow to in 15 years?

At an assumed 12% a year, ₹5 lakh invested once grows to about ₹27.37 lakh in 15 years, more than five times the original amount. At 10% it would be smaller. Actual market returns vary and are not guaranteed.

### Is lumpsum better than SIP?

If markets rise steadily, a lump sum usually ends higher because all the money is invested from day one. ₹1 lakh as a lump sum at 12% for 10 years grows to ₹3,10,585, while the same ₹1 lakh spread as a ₹833 monthly SIP grows to about ₹1,93,616. A SIP lowers the risk of investing everything just before a fall.

### How do I calculate lumpsum returns in Excel?

Use =FV(rate, years, 0, -amount), for example =FV(12%, 10, 0, -100000) returns 3,10,585. Or type the formula directly: =100000*(1+12%)^10.

### What is the inflation-adjusted value of my investment?

Divide the future value by (1 + inflation)^years. At 6% inflation, ₹3,10,585 received in 10 years buys what ₹1,73,429 buys today, which is a real return of about 5.7% a year on a 12% investment.

### How long does it take to double money?

Divide 72 by the annual return for a quick estimate. At 12% a year money doubles in about 6 years (6.1 exactly), at 8% in about 9 years and at 6% in about 12 years.

## Sources

- [SEBI Investor Education – Mutual funds](https://investor.sebi.gov.in/)
- [Compound interest (Wikipedia)](https://en.wikipedia.org/wiki/Compound_interest)

> Disclaimer: results are estimates for information and education, not financial advice. Confirm important decisions with a qualified professional.