SIP vs lump sum
A SIP puts a fixed amount into a fund at regular intervals, so you buy on many different dates. A lump sum puts the whole amount in at one time. They are two ways of putting money into the same kind of fund, not two different investments, and neither one promises a better return.
SIP and Lump sum side by side
| SIP | Lump sum | |
|---|---|---|
| What it is | A way of investing a fixed amount at regular intervals, such as every month | Investing the whole amount in one go |
| When you buy | On many different dates, at whatever price each date brings | On one date, at that day's price |
| Money needed at the start | A small amount each time, which can come from monthly income | The whole amount at once, so you need it already saved |
| Effect of price swings | Spreads your buying over many prices, so one bad date matters less | Everything depends on the price on the day you buy |
| What it needs from you | Keeping the habit going through ups and downs | Having the money, and deciding when to put it in |
| Does it promise a return | No | No |
A SIP is a method, not a product
A SIP is not a type of investment. It is a way of putting a fixed amount into a fund at regular intervals. The fund itself, a mutual fund or an index fund, is the investment. The same fund can be bought through a SIP or with a lump sum.
What a SIP changes
Because you buy on many dates, no single price decides your whole outcome. When prices are low your fixed amount buys more units, and when they are high it buys fewer. This spreads the risk of picking a bad moment. It does not remove the risk that the fund falls or does not grow.
What a lump sum changes
With a lump sum, all your money starts working from day one, so it has the longest time to grow if prices rise. If prices fall soon after, the whole amount feels it. The price on the day you invest matters much more.
How people decide
Often the choice is made by the money, not by a theory: someone with a monthly income invests monthly, and someone who has just received a large sum has to decide how to put it in. Neither method is right for everyone. The useful question is what you can commit to, and when you will need the money.
Two price paths, one amount (hypothetical numbers)
Suppose you have ₹12,000 to invest over four months. As a lump sum you put in all ₹12,000 at ₹100 a unit and get 120 units. As a SIP you put in ₹3,000 each month.
If the price goes 100, 80, 90, then 100, the SIP buys 30, 37.5, 33.3 and 30 units, 130.8 in all. At the final price of ₹100, the lump sum is worth ₹12,000 and the SIP about ₹13,083.
If the price instead rises steadily 100, 110, 120, then 130, the SIP buys 30, 27.3, 25 and 23.1 units, 105.4 in all. At ₹130, the lump sum is worth ₹15,600 and the SIP about ₹13,696.
Neither method won both times. Which one did better depended on the price path, which nobody knows in advance.
Common questions
- Is SIP better than a lump sum?
- Neither is better in every case. A SIP spreads your buying over many dates and suits regular income. A lump sum starts all the money working at once. The result depends on how prices move afterwards.
- Is a SIP a type of mutual fund?
- No. A SIP is a way of investing in a fund at regular intervals. The mutual fund is the investment.
- Does a SIP protect me from losses?
- No. It spreads the dates you buy, but the fund can still fall, and a SIP promises no return.
- Can I use a lump sum and a SIP together?
- Yes. People often invest a lump sum they already have and add a SIP from income. The choice depends on your money and your needs.
Related terms
This page compares ideas and does not recommend either one. Maetis does not give investment, tax or legal advice.