If you have ₹10 lakh sitting in your bank account today, should you invest it all at once, or spread it across 12 months as an SIP / STP?

The maths first

Historically, in markets that trend upward most of the time (like India over the last 20 years), lump sum beats SIP roughly 60–66% of the time, because you spend less time out of the market. That's just maths.

But maths is not the only thing that matters.

The three real questions

1. Do you actually have a lump sum?

If your money arrives monthly as salary, SIP isn't a choice — it's the only mechanism. Trying to "save up and time the market" leads to cash piling in a savings account at 3% while the index does 12%.

2. How will you behave in a 30% drawdown?

If you invest ₹10L lump sum and the market falls 30% next quarter, your portfolio shows ₹7L. Will you (a) hold, (b) add more, or (c) panic-sell?

If your honest answer is (c), then SIP / STP wins regardless of what the maths says. The best strategy is the one you can stick with.

3. Where is the market today?

At extremes (Nifty PE 30+, broader market frothy), staging in over 6–12 months via STP is rational. At neutral or undervalued levels, lump sum makes sense.

The middle path: STP from a liquid fund

For most lump sums above ₹3–5L, we recommend:

  1. Park the entire amount in a liquid fund (earns ~6–7%, fully liquid).
  2. Set up a Systematic Transfer Plan (STP) from the liquid fund to your equity fund.
  3. Spread over 6, 9 or 12 months based on market level and your comfort.

This captures the upside of being deployed while smoothing the behavioural risk of investing right before a correction.

When lump sum clearly wins

  • Markets just corrected 20%+ and sentiment is poor
  • You have a long horizon (10+ years) and won't look at the NAV
  • The lump sum is small relative to your overall portfolio

When SIP / STP clearly wins

  • You've never invested in equity before
  • Markets are near all-time highs and valuations look stretched
  • You know you'll check the portfolio weekly and worry
The best investment plan is the one you don't abandon. Optimise for behaviour first, returns second.

What we do for clients

We look at your cash flow, the current market level, your existing portfolio and your behavioural risk profile — then recommend a deployment plan in writing. Book a free call if you'd like one for your situation.