Lumpsum Investment Calculator
Calculate the future value of a one-time (lumpsum) mutual fund investment with annual compounding, plus its inflation-adjusted value.
Step-by-step working
- 1,00,000 × (1 + 12/100)^10 = ₹3,10,584.82
- Today's value = FV / (1 + 6/100)^10
Mathematical Formula
Overview & Explanation
A lumpsum investment compounds once a year at the assumed return.
How It Works
- Grow the amount by (1 + r) every year for t years.
- Optionally discount by inflation to see today’s value.
Practical Applications
- Investing a bonus or maturity proceeds.
- Comparing a lumpsum with a SIP.
How a lump-sum investment grows
A lump-sum investment is a single amount invested once and left to grow. The projection uses compound growth: future value = amount × (1 + annual return)^years.
The return you enter is an assumption, not a promise. Equity mutual funds in India have historically delivered long-term returns in the 10 to 12 percent range, debt funds 6 to 7 percent, but individual years can be much higher or lower.
Worked example
Investing 2,00,000 for 15 years at an assumed 11 percent: 1.11^15 = 4.785, so the projected value is about 9,57,000. Gains are about 7,57,000. At 8 percent the same investment would reach only 6,34,000, which shows how sensitive long-term results are to the return rate.
Lump sum vs SIP
Investing everything at once means all the money is exposed to the market from day one, which helps in rising markets but hurts if prices fall right after. Spreading money over several months through a systematic transfer plan reduces that timing risk. Long-term capital gains on equity funds are taxed above an annual exemption, so after-tax gains will be somewhat lower than the projection.
Example 1: ₹1 lakh for 10 years at 12%
Classic doubling-plus example.
Inputs
Investment amount (₹): 100000 · Expected return (% p.a.): 12 · Investment period (years): 10
Step 1
1,00,000 × (1 + 12/100)^10 = ₹3,10,584.82
Step 2
Today's value = FV / (1 + 6/100)^10
Maturity value
Result
Example 2: ₹5 lakh for 20 years at 10%
Long horizon.
Inputs
Investment amount (₹): 500000 · Expected return (% p.a.): 10 · Investment period (years): 20 · Expected inflation (% p.a.): 5
Step 1
5,00,000 × (1 + 10/100)^20 = ₹33,63,749.97
Step 2
Today's value = FV / (1 + 5/100)^20
Maturity value
Result
How it's calculated & sources
FV = P × (1 + r)^t, where r = annual return / 100 and t = years. Real value = FV / (1 + inflation)^t.
Frequently Asked Questions
What is the rule of 72?
Lumpsum or SIP – which is better?
Is the return guaranteed?
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