Lump Sum Calculator — One-Time Investment Growth
See how a single investment compounds over time. Compare lump sum with SIP to decide the best strategy for your goals.
How does lump sum investing work?
A lump sum investment means putting a large amount of money into a mutual fund or other investment vehicle at a single point in time, rather than spreading it across monthly contributions. The entire amount is immediately put to work, meaning it benefits from compounding for the full investment period from day one. The formula used is the standard compound interest formula: Maturity Value = Principal × (1 + r/n)^(n×t), where r is the annual return rate, n is the compounding frequency, and t is the time in years.
Lump sum investing works best when you have surplus funds — a bonus, an inheritance, proceeds from property sale, or accumulated savings — and you want them to start compounding immediately. The risk, compared to SIP, is that if you invest at a market peak, you may experience short-term losses. However, over long investment horizons of 7 years or more, this timing risk tends to diminish significantly.
When is lump sum better than SIP?
Lump sum investing generally outperforms SIP in bull markets because the entire corpus earns returns from the start. SIP tends to outperform in volatile or falling markets where rupee cost averaging lowers the average purchase price. If you have a large idle amount sitting in a savings account earning 3–4%, almost any long-term investment will likely outperform that — deploying it as a lump sum makes sound financial sense.
- Bonus or windfall: If you receive an annual bonus, deploy it as a lump sum rather than letting it sit idle.
- Debt repayment proceeds: Money recovered from debtors or matured FDs can be redeployed as a lump sum in equity funds during market corrections.
- Long horizon: With 10+ years, timing matters less — deploy the lump sum and stay invested.
- Hybrid approach: Invest the lump sum in a liquid fund, then use an STP (Systematic Transfer Plan) to move it to equity over 6–12 months.
Important tips
Odisha investors receiving gratuity, PF settlements, or land sale proceeds often wonder what to do with a sudden large amount. Resist the urge to park it all in an FD. While FDs feel safe, after accounting for taxes and inflation, their real returns are often near zero or negative. A well-chosen diversified equity mutual fund held for 10+ years has historically delivered 10–13% CAGR, which meaningfully outpaces inflation and grows real wealth.
Use this calculator to compare scenarios — what ₹5 lakhs becomes at 10% vs 12% over 10 years vs 15 years. The difference is often surprising and motivating. Always account for inflation using our Inflation Calculator to understand what your maturity value will be worth in today's money.