SIP vs Lumpsum Calculator
Compare returns between SIP investment and a one-time lump sum investment.
What is it?
SIP invests a fixed amount every month, while lumpsum invests the entire amount at once. Both grow through compounding, but perform differently depending on market conditions and timing — this calculator compares the two side by side.
Formula
SIP Future Value = P × [(1+r)^n − 1] / r × (1+r)
Lumpsum Future Value = P × (1 + r)^t
Formula Explanation
The lumpsum grows on the full amount from day one, compounding for the entire duration. The SIP, by contrast, invests smaller amounts progressively — each installment gets less time to compound than the one before it. This is why a lumpsum invested at the start of a rising market often outperforms an equivalent SIP, while SIP tends to do better when markets are volatile or declining early on.
Example Calculation
A $10,000/month SIP vs. an equivalent $1,200,000lumpsum over 10 years at 12% return: the lumpsum grows to about $3,730,000, while the SIP grows to about $2,320,000 — illustrating how a lumpsum invested entirely upfront can outpace an SIP of similar total commitment, in a steadily rising market.
How to Use
- Enter your planned monthly SIP amount.
- Enter the lumpsum amount you would invest instead.
- Enter the expected annual return and investment duration.
- Compare the projected value of each approach.
Benefits
- Directly compares two common investment strategies side by side.
- Helps clarify how much timing risk affects a lumpsum vs. staggered approach.
- Useful when deciding what to do with a windfall like a bonus or inheritance.
Use Cases
- Deciding whether to invest a bonus as a lumpsum or spread it via SIP.
- Understanding the tradeoffs before choosing an investment approach.
- Comparing outcomes under the same assumed rate of return.
What Your Result Means
Both figures assume the same fixed annual return, so the comparison mainly illustrates the mathematical effect of investing all at once versus gradually — it does not account for the real-world uncertainty of when markets will rise or fall, which is the actual reason SIP and lumpsum often perform differently in practice.
Tips
- Remember this comparison assumes a constant, guaranteed return — real markets fluctuate, which changes the practical outcome.
- Lumpsum tends to work better in consistently rising markets; SIP tends to reduce risk in volatile ones.
- Consider combining both: investing an existing lumpsum immediately while continuing a parallel SIP.
Common Mistakes
- Assuming this fixed-rate comparison reflects real-world market timing risk, which it does not model.
- Choosing lumpsum purely because the math looks better here, without considering your actual risk tolerance.
- Comparing unequal total amounts between the SIP and lumpsum inputs.
FAQs
Which is better, SIP or lumpsum?
It depends on market conditions. Lumpsum tends to perform better in consistently rising markets, while SIP reduces risk through rupee cost averaging in volatile markets.
Does SIP reduce risk compared to lumpsum?
Yes, by spreading purchases across market highs and lows, SIP reduces the impact of poor timing compared to investing a lumpsum at a single point.
Can I combine SIP and lumpsum?
Yes, many investors put a lumpsum amount to work immediately and continue building wealth with a parallel SIP.
Why might my results differ from real-world SIP vs lumpsum comparisons?
This calculator uses a single fixed annual return for both strategies, while real markets fluctuate year to year — actual outcomes depend heavily on the specific sequence of returns experienced.
This calculator provides estimates based on the expected return you enter. Actual mutual fund returns vary with market performance.
Last updated: July 25, 2026