SIP or Lump Sum: How to Think About the Choice
Two ways of putting money into the same fund. What actually differs, and the questions that settle it.
Urja Investment DeskInvestor education
A systematic investment plan (SIP) and a lump sum are not different products. They are two ways of buying units of the same scheme — one in instalments, one in a single purchase.
What changes between the two
| SIP | Lump sum | |
|---|---|---|
| When the money goes in | A fixed amount at a fixed interval | All at once |
| Purchase price | Averaged across many dates | The NAV on one date |
| Suits money that is | Earned monthly | Already sitting idle |
| Main behavioural risk | Stopping when markets fall | Regret about the entry date |
Rupee-cost averaging, plainly
With a SIP the same rupee amount buys more units when the NAV is low and fewer when it is high. Over time your average cost per unit sits below the simple average of the prices you paid. It does not guarantee a profit and it does not protect against loss in a falling market — it only removes the need to pick a date.
Questions that usually settle it
- Where is the money now? A salary suggests a SIP; a bonus or a matured deposit is a lump sum by nature.
- How long can it stay invested? The shorter the horizon, the more the entry date matters.
- How would you react to a 20% fall a month after investing? Be honest — the answer matters more than any calculation.
Try the numbers
The SIP and lump-sum calculators on this site let you change the amount, the period and the assumed return to see how the two compare. The assumed return is yours to choose; nothing about it is a forecast.
Mutual fund investments are subject to market risks. Read all scheme-related documents carefully. Urja Investment distributes mutual funds (AMFI ARN-357599) and does not provide investment advice.
This article is for investor education. It is not investment, tax or legal advice and is not a recommendation to buy or sell any security. Investments in the securities market are subject to market risks; read all related documents carefully before investing.