Updated June 2026

Lumpsum Calculator

Invest ₹5 lakh today at 12% for 10 years and you get ₹15.5 lakh. But after tax and inflation, it's worth only ₹7.6 lakh in today's money. See the real numbers.

₹
Allowed range: ₹10,000 to ₹1,00,00,000. Values outside this range are adjusted to the nearest limit.
%
Allowed range: 1 to 30%. Values outside this range are adjusted to the nearest limit.
Yrs
Allowed range: 1 to 40 Yrs. Values outside this range are adjusted to the nearest limit.
Adjust for Inflation
%
Allowed range: 3 to 12%. Values outside this range are adjusted to the nearest limit.
Deduct LTCG Tax
Invested Amount
Est. Returns
Nominal Future Value

₹15.53 L

Invested Amount

₹5.00 L

Est. Returns

₹10.53 L

Value in today's rupees (6% inflation)

₹8.67 L

Your ₹15.53 L is reduced to ₹8.67 L in today's purchasing power. That's 44% less than the headline number.

Investment Growth Over Time

₹0₹4.3L₹8.5L₹12.8L₹17.1L1Y2Y3Y4Y5Y6Y7Y8Y9Y10Y

Chart from year 1 to year 10. Total Value changes from ₹5.6L to ₹15.5L. Invested changes from ₹5L to ₹5L. After Inflation changes from ₹5.3L to ₹8.7L.

Total Value
Invested
After Inflation

Year-wise Breakdown

10 years

How the Lumpsum Calculator Works

Enter your one-time investment amount, expected annual return rate, and investment duration. The calculator uses the compound interest formula: FV = P × (1 + r)n: to project your corpus. Toggle inflation and LTCG tax to see what your money can actually buy when you need it.

Why Lumpsum Returns Look Better Than They Are

A ₹5 lakh lumpsum growing to ₹15.5 lakh in 10 years sounds like a 3× return. But two forces eat into this:

  • Inflation (6% p.a.): ₹15.5L in 10 years buys what ₹8.7L buys today. Your real return drops from 12% to ~5.7%.
  • LTCG Tax (12.5% + 4% cess): On ₹10.5L gains, after ₹1.25L exemption, you pay ~₹1.2L tax. Your take-home drops further.

Combined, inflation and tax can wipe out 40-50% of your apparent gains. This is why our calculator exists: to show the real number, not the fantasy.

Lumpsum vs SIP: When to Use Which

  • Lumpsum: Best when you receive a windfall (bonus, inheritance, matured FD) and have a 7+ year horizon. More money compounds for longer.
  • SIP: Best for salaried investors deploying monthly savings. Reduces timing risk through rupee cost averaging.
  • STP (Systematic Transfer Plan): The middle ground. Park your lumpsum in a liquid fund and transfer to equity monthly over 6-12 months.

The Power of Time in Lumpsum

At 12% CAGR, ₹5 lakh becomes ₹15.5L in 10 years, ₹48.2L in 20 years, and ₹1.5 Cr in 30 years. The compounding curve is exponential: the last 10 years generate more wealth than the first 20 combined. This is why starting early matters more than starting big.

Frequently Asked Questions

What is a lumpsum investment?
A lumpsum investment is when you invest a large amount of money at once, rather than spreading it over time via SIP. Examples include investing a bonus, inheritance, property sale proceeds, or matured FD amount into mutual funds. The entire principal starts compounding from day one.
How does lumpsum compounding work?
Lumpsum uses the compound interest formula: FV = P × (1 + r)^n. Your entire principal (P) compounds at the annual return rate (r) for the full duration (n years). Because the entire amount compounds from day one, lumpsum typically generates higher absolute returns than SIP for the same total amount: assuming a steadily rising market.
Is lumpsum better than SIP?
Mathematically, lumpsum beats SIP about 65-70% of the time over 10+ year periods because more money compounds for longer. However, SIP reduces timing risk through rupee cost averaging. If you have a large amount and a 7+ year horizon, lumpsum usually wins. If markets are at all-time highs and you're nervous, consider splitting 60% lumpsum + 40% via STP over 6 months.
What returns can I expect from lumpsum in equity?
Historically, Nifty 50 has delivered 11-13% CAGR over 15-20 year periods. Active large-cap funds have delivered 12-15%. However, equity returns are not guaranteed: any 1-3 year period can show negative returns. For lumpsum, use a conservative 10-12% for financial planning. Toggle inflation in our calculator to see the real return.
How does LTCG tax apply to lumpsum?
When you redeem your equity mutual fund investment after 12 months, gains above ₹1.25 lakh per year are taxed at 12.5% + 4% cess (Income Tax Act 2025). For example, if your ₹5L lumpsum grows to ₹15.5L in 10 years, your gain is ₹10.5L. After ₹1.25L exemption, ₹9.25L is taxed at 13% effective: roughly ₹1.2L in tax. Toggle LTCG in our calculator to see the exact impact.
Why should I adjust lumpsum returns for inflation?
A ₹5L investment growing to ₹15.5L in 10 years (12% CAGR) looks impressive. But at 6% inflation, ₹15.5L in 10 years has the purchasing power of only ₹8.7L today. Your real CAGR is about 5.7%, not 12%. Without inflation adjustment, you're planning your future with fantasy numbers.
When should I invest lumpsum?
Invest lumpsum when: (1) you have a windfall: bonus, inheritance, matured FD, property sale; (2) your time horizon is 7+ years; (3) you're comfortable with short-term volatility of 20-30%. Avoid lumpsum for money you need within 3 years: use FD or liquid funds instead.
What if the market crashes after my lumpsum investment?
Market crashes are temporary: every crash in Indian market history has recovered within 2-3 years. If you invested ₹10L at the peak of Jan 2008 (pre-crash), by 2010 you were back at breakeven, and by 2014 you had doubled. The key: don't panic-sell during crashes. If you can't handle a 30-40% temporary drop, split your investment via STP instead.

Lumpsum by Amount & Duration

₹50,000 for 5 years ₹1 Lakh for 5 years ₹1 Lakh for 10 years ₹2 Lakh for 5 years ₹5 Lakh for 5 years ₹5 Lakh for 10 years ₹10 Lakh for 10 years ₹10 Lakh for 15 years ₹20 Lakh for 10 years ₹20 Lakh for 15 years ₹50 Lakh for 10 years ₹50 Lakh for 15 years ₹1 Crore for 20 years

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