Lumpsum Investment Calculator: When to Invest a Lump Sum vs SIP
Time in Market Beats Timing the Market — Usually
You’ve received a bonus, inheritance, or maturity payout. Should you invest it all at once or spread it out via SIP? Historical data shows that lumpsum investing beats SIP roughly 65% of the time over 10+ year periods because markets trend upward. By investing all at once, your entire capital compound from day one.
When Lumpsum Wins
- After a major market correction: Investing a lump sum when Nifty has fallen 20–30% from highs historically delivers exceptional returns
- Long investment horizon (10+ years): Short-term volatility gets smoothed out; earlier deployment means more compounding
- In debt funds: Lumpsum in debt funds carries minimal timing risk since debt funds are less volatile
When SIP Wins
- Overvalued markets: If the PE ratio of Nifty is above 22–25, spreading investments reduces the risk of buying at peak
- You can’t stomach volatility: SIP provides psychological comfort through rupee-cost averaging
- Regular income source: If the money comes monthly (salary), SIP is the natural fit
Lumpsum Growth: ₹10 Lakh at 12% CAGR
| Years | Corpus | Absolute Return |
|---|---|---|
| 5 | ₹17.6L | 76% |
| 10 | ₹31.1L | 211% |
| 15 | ₹54.7L | 447% |
| 20 | ₹96.5L | 865% |
Use the lumpsum calculator to model growth, or compare with equivalent SIP scenarios.