Lumpsum
Calculator

Lumpsum (a.k.a. one-time) investment is when you put a single large amount into a mutual fund scheme on one date, vs SIP which spreads investments across months. Lumpsum gets full exposure immediately, so it benefits more from compounding when the market rises.

SIP is better when you don't have a large amount upfront, want to average through volatility, or are uncertain about market timing. For investors with idle cash (windfall, bonus, sale proceeds), lumpsum or staggered STP is generally efficient.

Long-term backtests on Indian equity indices (Nifty 50 TRI, 1995-2024) show lumpsum beats SIP roughly 60-70% of the time over 10+ year horizons, because markets trend up and lumpsum gets full exposure immediately. However: (1) Lumpsum requires you to time the market — investing at a peak (2007, 2020 Q1) means painful drawdowns. (2) SIP gives behavioural discipline most investors actually need. (3) STP (Systematic Transfer Plan from liquid fund into equity over 6-12 months) is a sensible middle path.

If markets feel toppy, lean toward STP; if undervalued, lumpsum.

Long-term equity mutual fund lumpsum CAGR in India: large-cap 10-12%, flexi-cap 11-13%, mid-cap 13-15%, small-cap 14-17%. Index funds (Nifty 50, Nifty Next 50) typically deliver index returns minus a tiny tracking error and ~0.05-0.20% expense ratio.

Debt mutual funds: 6-8% (post April 2023, taxed at slab rates). Liquid funds: 5-7%.

For balanced portfolios, 10-12% is a reasonable long-term assumption — but past performance does not guarantee future returns.

Standard compound interest formula: Final Value = Principal × (1 + r)^n, where r is annual rate (decimal) and n is years. Example: ₹10 lakh invested at 12% for 20 years = 10 × (1.12)^20 = ₹96.46 lakh.

To express as CAGR: CAGR = (FV / P)^(1/n) − 1. For real return adjusted for inflation: divide final value by (1+inflation)^n. ₹96.46 L in 20 years at 6% inflation = ~₹30 L in today's purchasing power — still 3x your money in real terms.

Equity mutual funds (held 12+ months): LTCG taxed at 12.5% on gains above ₹1.25 lakh per FY (FY 2024-25 onward). Held under 12 months: STCG at 20%.

Debt mutual funds: gains taxed at slab rates regardless of holding period (post April 2023 changes — indexation removed). ELSS (tax-saving equity funds): qualify for 80C deduction up to ₹1.5L/year, 3-year lockin per investment.

International funds: taxed as debt funds in India. Always factor tax into expected after-tax CAGR — a 12% pre-tax becomes ~10.5% after LTCG for most investors.

Mathematically yes — buying at lower prices increases expected long-term returns. Behaviourally hard, because corrections feel scary.

Practical approach: split your lumpsum into 4-6 tranches deployed across 6-12 months via STP from a liquid fund. This: (1) reduces regret if market drops further, (2) catches some of the recovery, (3) requires less timing accuracy.

If you're 25-40 years old with a 20+ year horizon, single-shot lumpsum during corrections (-15% from peak) historically delivers strong long-term outcomes — but only invest money you genuinely won't need for 7-10+ years.