Compare investing a fixed amount as a lump sum vs. spreading it as a monthly SIP. See the exact outcome difference and understand which strategy works best for your situation.
Compare deploying a fixed corpus at once vs. spreading it monthly.
Nifty 50 historical average: ~12% p.a. (not guaranteed)
SIP amount: ₹8,333/month
Both scenarios invest ₹1.00 L total over 10 years at 12% p.a.
In a steadily rising market, investing everything at once gives your money the most time to compound. If you are confident about long-term market direction and won't panic on dips, lump sum wins.
This calculator assumes constant market return at 12% p.a. Real markets are volatile — lump sum can underperform SIP in falling or sideways markets.
In a steadily rising market, lump sum always wins. The reason is simple: money invested earlier spends more time compounding. If you invest ₹1 lakh today at 12% and the market rises steadily, that money earns returns from day one. If you spread ₹1 lakh over 12 monthly SIPs, only the first ₹8,333 earns returns from month one — the rest enters later at progressively higher prices.
However, real markets are not steady. They fall 20-40% during corrections. If you invest your full corpus just before a crash, you may see your portfolio halved within months — even if it recovers years later. A SIP spread protects you from this timing risk by buying some units at the post-crash lower prices.
The longer your time horizon, the less timing risk matters. Over 15–20 years, the difference between a lump sum invested at a market peak vs. a trough typically disappears. Over 5 years, it can be significant.
| Factor | Lump Sum | SIP Spread | Verdict |
|---|---|---|---|
| Who wins mathematically in rising markets | ✓ Lump sum | More time in market = more compounding | Lump sum |
| Protection from poor timing | No protection | ✓ Averages your entry price | SIP spread |
| Best for long horizon (10+ years) | ✓ Time erases timing risk | Also fine, slightly lower FV | Lump sum |
| Best for short horizon (< 5 years) | Risky if market falls post-investment | ✓ Limits downside from bad timing | SIP spread |
| Emotional ease for new investors | Hard if portfolio dips immediately | ✓ Easier to stomach gradual entry | SIP spread |
| Tax efficiency | LTCG kicks in after 1 year from investment date | Each installment has its own 1-year LTCG clock | Lump sum (simpler) |
For most Indians receiving a bonus or windfall, a pragmatic approach:
The worst outcome is not lump sum vs. SIP — it is waiting to invest because you cannot decide. Use the calculator above, pick a strategy, and start.
Mathematically, lump sum outperforms SIP spread when markets rise consistently, because money invested earlier has more time to compound. However, SIP spread wins or loses less when markets are volatile or declining at the time of investment. For most Indians with a bonus or windfall, a 6–12 month SIP spread is a reasonable middle ground if they are unsure about timing.
Lump sum is better when: (1) markets have just recovered from a significant correction, (2) you have a long time horizon (10+ years) and can withstand short-term volatility, (3) you have high conviction about the long-term direction of markets, (4) you want to maximize compounding time. The longer your time horizon, the less timing risk matters.
Spread your investment if: (1) markets are near all-time highs and you are uncertain, (2) you cannot emotionally handle seeing your portfolio down 20-30% immediately after investing, (3) your investment horizon is under 5 years, (4) you received a sudden large amount (bonus, inheritance) and want to average your entry price.
SIP spread reduces timing risk — the risk of investing your entire amount just before a market fall. It does NOT reduce market risk, volatility risk, or the risk of poor fund selection. Both SIP and lump sum are subject to market fluctuations. SIP simply smooths your purchase price by buying at different market levels.
Regular SIP uses fresh money from your monthly salary — you invest a fixed amount every month as income arrives. A lump sum SIP spread deploys an existing corpus you already have, dividing it into monthly installments over 6, 12, or 24 months. This calculator models the lump sum SIP spread scenario, not the regular monthly income SIP.
Enter your total investible amount, expected annual return, and investment period. The lump sum scenario assumes all money is invested on day one and compounds at the given rate. The SIP spread scenario divides the total into equal monthly installments, computes the corpus at the end of the spread period, then grows it for the remaining years. The difference between the two final values is the lump sum advantage (or disadvantage).
This calculator provides estimates for educational purposes only. Returns are projected at a constant assumed rate and do not represent actual market performance. Past performance does not guarantee future results. Consult a SEBI-registered financial advisor before making investment decisions.