Guide
SIP vs Lumpsum: Which Is Better?
The honest answer to "SIP or lumpsum?" is: it depends on whether you actually have the lumpsum.
In shortWith money already in hand, a lump sum usually beats a SIP over long periods, because all of it is invested sooner. A SIP is the natural choice for money earned monthly and reduces regret from investing just before a fall. If you have a lump sum but fear timing, an STP staggers it over a few months.
The maths usually favours lumpsum
If markets generally rise over time — which they have historically — then money invested earlier has longer to compound. A lumpsum puts all your money to work on day one, so on paper it tends to beat the same total amount drip-fed through a SIP.
Our SIP-vs-lumpsum calculator shows this directly: feed in the same total cash and the lumpsum usually ends with a higher corpus.
What 20 years of Nifty 50 data says
We tested the real choice on monthly NAVs of a Nifty 50 index fund from April 2006 onward (official AMFI data, after the fund's costs). For every possible start month, we compared investing ₹1,20,000 at once against spreading it as ₹10,000 a month over 12 months, then measured both five years after the start date.
| Nifty 50 index fund, 2006–2026 | Result |
|---|---|
| Start months tested | 187 |
| Lump sum ended ahead | 72% of the time |
| Typical (median) advantage of the lump sum | 5.3% more after five years |
| Lump sum's best start (March 2009, just after the crash) | 55.9% ahead |
| Lump sum's worst start (May 2008, just before the crash) | 33.6% behind |
The Sensex gives almost identical results: 73% and 5.3%. So the lump sum usually wins, by a modest margin, but when it loses it can lose badly. That lopsided risk is the real argument for spreading a large amount.
Why a SIP wins in a falling market
Take ₹1,20,000. Invest it at once at a NAV of ₹100 and you own 1,200 units. Instead, invest ₹10,000 a month while the NAV slides steadily from ₹100 to ₹60 over the year, and you collect about 1,539 units. When the NAV climbs back to ₹100, the lump sum is only back to ₹1,20,000, while the SIP is worth about ₹1,53,900, a 28% gain on the same money. The SIP turned the fall into cheap units. This is exactly the scenario a lump-sum investor fears, and it is why the worst lump-sum starts in the table cluster just before crashes.
But the comparison hides an assumption
That advantage assumes you have the full sum available today. Most people don't. They have a monthly surplus from salary — which is precisely the cash flow a SIP is designed for.
Comparing a lumpsum you don't have to a SIP you can actually do is comparing a fantasy to reality. For most salaried investors, the real choice isn't SIP versus lumpsum — it's SIP versus not investing.
The middle path: an STP
If you have a lump sum but would lose sleep investing it all at once, a systematic transfer plan (STP) parks the money in a liquid or debt fund and moves a fixed amount into equity every month. The waiting money still earns interest, and you avoid the "all in at the top" outcome. Over 6–12 months the cost of waiting is usually small. Compare both on the lump sum vs STP calculator.
A quick way to decide
| Your situation | Usually sensible |
|---|---|
| Monthly surplus from salary | SIP, stepped up every year |
| Windfall, long horizon, calm about falls | Lump sum |
| Windfall, but a 30% fall in year one would make you sell | STP over 6–12 months |
| Money needed within 3 years | Neither in equity; use debt or deposits |
When each genuinely makes sense
Lumpsum suits a windfall: a bonus, an inheritance, maturity proceeds. If the money is sitting idle, getting it invested generally beats holding it for a 'better' entry point.
A SIP suits regular income and nervous investors. If a large one-time investment would keep you up at night about market timing, staggering it removes that anxiety — and a calmer investor is one who stays invested.
Past index returns do not guarantee future results. This is educational information, not investment advice.
Sources
- Total Return Index NSE Indices Limited
- AMFI: Net Asset Value of mutual fund schemes Association of Mutual Funds in India
- Mutual Funds Sahi Hai: investor education Association of Mutual Funds in India
Rules and rates were checked against these official sources at the last review.
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