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Lumpsum Calculator

Calculate how a one-time investment grows with compound interest. See your wealth after 5, 10, 20 years — and understand when lumpsum beats SIP.

Rule of 72
Money doubles every 72/r years
10x
₹5L at 12% over 20 yrs
STP
Best deployment strategy
One-time investment
₹10K₹1 Cr
Expected return (p.a.)
%
1%30%
Time period
yrs
1 yr40 yrs
Invested
Est. returns
Total value
Total
Invested Returns

What is a Lumpsum Investment?

A lumpsum investment means deploying a large amount of money in a single transaction rather than spreading it over time. When you receive a year-end bonus, sell a property, receive an inheritance, or accumulate savings, investing it all at once maximises the time your capital compounds.

The key advantage: 100% of your capital starts compounding from day one. With SIP, only the first instalment earns returns for the full period — later instalments earn proportionally less. Lumpsum eliminates this averaging effect entirely.

Immediate full compounding
All capital earns returns from day 1 — SIP takes years to deploy the same amount.
📈
Rule of 72
Divide 72 by return rate for doubling time. At 12%, money doubles every 6 years. At 8%, every 9 years.
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STP reduces risk
Park in liquid fund, transfer monthly to equity via STP. Get both immediate returns and cost averaging.
💸
Ideal for windfalls
Bonus, property sale, gratuity, inheritance — lumpsum puts large capital to work immediately.

Lumpsum Return Formula

FV = P × (1 + r)ᵗ
FV — Future value (maturity amount)
P — Principal invested
r — Annual return rate (decimal)
t — Time in years

Example — ₹5 lakh invested, 12% return, 10 years

Principal₹5,00,000
Annual return12%
Total returns₹10,52,179
🏆 Total value after 10 years₹15,52,179

Power of time: The same ₹5 lakh at 12% for 20 years becomes ₹48.2 lakh — nearly 10x. For 30 years: ₹1.49 crore. The final decade adds more wealth than the first two decades combined — this is compounding acceleration.

Lumpsum vs SIP — When Does Each Win?

ScenarioLumpsum advantageSIP advantage
Market timingInvesting at market lowsCannot time market at all
Capital availabilityLarge amount availableRegular monthly income
Market directionConsistently rising marketsVolatile or falling markets
Historical win rate~60% of 10-year periods~40% of 10-year periods
Emotional comfortHigh risk tolerance neededSmooths emotional experience
Best strategyCombine both: SIP for regular income + Lumpsum for bonuses/windfalls

The STP Strategy — Best of Both Worlds

1

Park lumpsum in a liquid fund

Instead of investing directly in equity, first put your lumpsum in a liquid mutual fund. Liquid funds earn 6–7.5% p.a. with next-day redemption. Your money earns while waiting.

2

Set up a Systematic Transfer Plan (STP)

Instruct the AMC to automatically transfer a fixed amount monthly from the liquid fund to an equity fund. Over 6–12 months, your full lumpsum moves to equity.

3

Benefit: earning + averaging

Your money earns 6–7% in liquid fund while waiting, and you average your equity entry price across multiple months. Recommended for amounts above ₹5 lakh.

Frequently Asked Questions

With a 7+ year horizon, "timing" matters far less than people think. Historical data shows that even investing at the absolute market peak of 2008 (just before the financial crisis) gave strong positive returns over 10 years. For shorter horizons under 3 years, avoid equity lumpsum and use FD or liquid funds instead.
Equity mutual funds held over 1 year: Long Term Capital Gains (LTCG) at 10% on gains above ₹1 lakh per financial year. Held under 1 year: Short Term Capital Gains at 15%. For debt mutual funds (from April 2023): taxed at your income slab rate regardless of holding period, with no indexation benefit.
Most mutual funds accept lumpsum investments starting from ₹1,000–5,000. Index funds often allow as low as ₹100–500 through platforms like Zerodha Coin, Groww, or directly via AMC websites. Direct plans (without distributor commission) have the same minimums as regular plans.
It depends on existing investments. If you have an emergency fund of 6 months' expenses and no high-interest debt, yes — investing the full bonus is generally good. Consider using 50–60% as direct lumpsum to your preferred fund, and routing 40–50% via STP from a liquid fund over 3–6 months to average your entry.