# Lumpsum Calculator

URL: https://speedycalculator.com/calculators/finance/lumpsum/
Last updated: 2026-10-25

> The lumpsum calculator works out the future value of a one-time investment in a mutual fund or other asset at an expected annual return – the total value, gains and, optionally, the value after inflation.

## Inputs

- Total investment
- Expected return (p.a.) (%)
- Time period (years)
- Inflation (%)

## Results

- Total value
- Estimated returns
- Value in today's money

## Formula

```
Future value = P × (1 + r)^years
Real value = future value ÷ (1 + inflation)^years
```

## Explanation

A lump sum benefits most from compounding when invested early, but timing matters more than with an SIP. Equity mutual funds in India have historically returned around 10–14% a year over long periods, with big swings.

### How to use the Lumpsum Calculator

- **Total investment**
- **Expected return (p.a.)**
- **Time period**
- **Inflation**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the amount invested, the expected annual return, the period and inflation.

### Tips

- Figures use the latest published rates; government scheme rates are revised every quarter.
- Choose between the old and new tax regimes carefully – deductions only count in the old regime.
- Keep proofs of investments and rent for your employer and the tax return.
- Use the official portal of each scheme for exact maturity values.

### Common mistakes to avoid

- Assuming scheme interest rates are fixed for the whole term.
- Forgetting tax on interest from fixed and recurring deposits.
- Missing the yearly minimum deposit on PPF or Sukanya Samriddhi accounts.

### Inputs explained

FieldWhat to enterTotal investmentAmount in ₹Expected return (p.a.)In %Time periodIn yearsInflationIn %

### What each result means

- **Total value** = [Total investment]×(1 + [Expected return (p.a.)]÷100)^[Time period]
- **Estimated returns** = [Total value] - [Total investment]
- **Value in today's money** = [Total value]÷(1 + [Inflation]÷100)^[Time period]

### Example values

How the main result changes when **Total investment** changes and everything else stays at the example values above:

Total investmentTotal value50,000155,292.4175,000232,938.62100,000310,584.82125,000388,231.03150,000465,877.23200,000621,169.64

## Worked example

Inputs — Total investment: ₹100,000; Expected return (p.a.): 12 %; Time period: 10 years; Inflation: 5 %.

Results — **Total value = ₹310,584.82**; Estimated returns = ₹210,584.82; Value in today's money = ₹190,672.14.

## FAQ

**What will ₹1 lakh become in 10 years at 12%?**
About ₹3.1 lakh.

**Is a lump sum better than an SIP?**
Lump sums can earn more in rising markets; SIPs reduce timing risk.

**How are mutual fund gains taxed?**
Equity LTCG above ₹1.25 lakh a year at 12.5%; STCG at 20%.

**What formula does the Lumpsum Calculator use?**
Future value = P × (1 + r)^years.