Two people want to invest in mutual funds. One earns a salary and can save ₹10,000 every month. The other has just received ₹12 lakh from a matured policy. Both ask the same question: should I invest through a SIP or as a lumpsum? The right answer depends on where your money comes from and when you need it.
What is a SIP?
A Systematic Investment Plan (SIP) invests a fixed amount in a mutual fund on a fixed date every month. Because the amount is fixed, you buy more units when prices are low and fewer when they are high. Over time this averages out your purchase cost. This is called rupee cost averaging.
What is a lumpsum investment?
A lumpsum puts the entire amount into the fund in one go. All of your money starts earning from day one, which helps when markets rise after you invest. If markets fall soon after, the whole amount is exposed to that fall.
The same ₹12 lakh, two ways
Consider ₹12 lakh over 10 years at an assumed 12% a year:
| Approach | Invested | Value after 10 years |
|---|---|---|
| ₹10,000 a month SIP for 10 years | ₹12,00,000 | ₹23,23,391 |
| ₹12 lakh lumpsum on day one | ₹12,00,000 | ₹37,27,018 |
The lumpsum ends higher because all the money was invested for the full 10 years. But this comparison is unfair to the salaried investor, who never had ₹12 lakh on day one. For most people the choice is made by their cash flow.
When SIP makes sense
- You invest from your monthly income.
- You are new to equity and want to avoid investing everything at a market peak.
- You want a habit that runs automatically.
When lumpsum makes sense
- You already have the money: a bonus, maturity amount or property sale.
- You are investing in debt or hybrid funds, where swings are smaller.
- Your horizon is long and you can stay invested through a fall.
The middle path: STP
A Systematic Transfer Plan (STP) gives you both. You put the lumpsum in a low-risk liquid or arbitrage fund and transfer a fixed amount every week or month into an equity fund over 6 to 12 months. Your money earns from day one and your equity entry is spread out.
Try the numbers yourself with our SIP calculator and lumpsum calculator.
