SIP vs Lumpsum Calculator — Which Is Better for You? — FY 2026-27

Depends on market timing and your financial situation. SIP wins when: (1) market is volatile or trending down, (2) you don't have a large lump sum, (3) you want disciplined forced saving. Lumpsum wins when: (1) market is clearly in a long bull run, (2) you have cash sitting idle, (3) you can time entry. For most Indian salaried investors, SIP is the right default because most don't have ₹10-50 L idle lump sums.

Use equivalent total capital: a ₹10K × 120-month SIP = ₹12 L total vs a ₹12 L lumpsum upfront. At 12% return over 20 years, lumpsum grows to ₹92 L, SIP grows to ₹99.9 L. SIP wins here because the investment period is longer (20 years from first SIP vs 10 years after last SIP deposit). Over identical horizons, lumpsum wins — but nobody compares with identical horizons in practice.

Marginally. Over 15-20 year horizons, India equity returns average 11-13% and the benefit of rupee-cost-averaging over a lumpsum invested in a single down-year is 1-2% CAGR. The real power of SIP is BEHAVIORAL — it forces monthly discipline that most investors can't maintain with lump sums. The calculation-level benefit is small; the discipline benefit is enormous.

When you receive a large windfall (bonus, inheritance, property sale) and have NO existing market position, a lumpsum in a diversified index fund typically outperforms spreading it over 12-24 months. Research from Vanguard + ICICI Prudential shows 66% of lumpsum beats DCA on historical data. The main caveat: don't lumpsum if you cannot stomach a 30-40% drawdown in year 1.

Yes — this is actually the optimal strategy. Start a SIP for disciplined ongoing investment, and deploy lumpsum amounts whenever you receive them (bonuses, windfalls). Over 20 years, this combo typically beats pure-SIP or pure-lumpsum by 5-10% because you capture both dollar-cost-averaging AND the benefits of deploying extra capital early.