SIP mistakes, ranked by what they cost
Most "SIP mistakes" lists are padded with trivia. These are ordered by how much money they actually cost, and the top three are worth more than every fund-selection decision you will ever make.
1. Stopping during a crash
By a wide margin the most expensive thing you can do, and the most common.
A 30% drawdown makes a SIP feel like a mistake, so people cancel — at precisely the point their fixed instalment is buying the most units it will ever buy. They then wait for markets to "stabilise", which in practice means re-entering after the recovery.
Stop a ₹5,000 SIP after five years instead of running twenty and you end with ₹4,12,432 rather than ₹49,95,740. The lost instalments account for ₹9 L of that gap; the rest — ₹36.83 L — is compounding you cannot buy back.
The uncomfortable truth is that a falling market is the only time a SIP does something a lump sum cannot. Cancelling then throws away the mechanism's single structural advantage.
2. Waiting to start
"I'll start once I'm earning more", "once the market corrects", "once I've researched funds properly". Each of these has a price, and it is far higher than intuition suggests.
Delaying a ₹5,000 SIP by five years against a fixed twenty-year deadline costs ₹24.73 L, while the instalments you skipped total only ₹3 L — roughly 8× the money you did not invest.
The reason is which years you lose. Waiting removes your first five years, the only ones that get the full term to compound. To land in the same place you would have to pay ₹9,901 a month instead of ₹5,000 for the remaining fifteen years.
Put your own numbers through the cost of waiting calculator.
3. Never increasing the amount
Setting a SIP at what you could afford at 25 and still paying it at 45 is a slow, silent version of mistake two. Your income roughly tripled and your investing did not move.
Worse, a flat instalment shrinks in real terms. ₹5,000 a month held constant for twenty years is worth ₹1.56K a month in today's money by the end. Standing still requires rising with inflation; getting ahead requires rising with income.
A 10% annual step-up on the same starting amount reaches ₹99,44,358 against ₹49,95,740. One instruction, set once. See step-up SIP explained.
4. Mismatching the horizon to the risk
An equity SIP for a goal two years out is not investing, it is a bet with a deadline. Equity needs enough time to ride out a bad stretch, and two years does not provide it.
The mirror error costs just as much and gets far less attention: a recurring deposit or a liquid fund for a twenty-year retirement goal. That is a guaranteed real loss, because 7% taxed at 30% is 4.90%, which against 6% inflation is -1.04% in real terms.
Rough mapping: under three years, deposits or debt. Three to seven, hybrid. Beyond seven, equity can do its job. See what rate to assume.
5. Chasing last year’s top performer
Switching into whichever fund or category topped the trailing-returns table is close to a guaranteed way to buy high. A category at the top of a three-year table has usually just had its favourable window, and mean reversion in fund rankings is well documented.
Each switch is also a redemption, so it realises capital gains and may attract an exit load — paying tax for the privilege of buying something expensive. See SIP taxation in India.
Reviewing annually is sensible. Rotating annually is not.
The rest, briefly
- Too many funds. Eight equity funds is not diversification, it is an index fund with extra paperwork and a higher fee. Three or four covering distinct mandates is plenty.
- Judging a SIP by absolute return. "Up 22%" says nothing without a period. Use XIRR.
- Planning in nominal rupees. A ₹1 crore target in 20 years is about ₹31.18 L in today's money. Price goals forward.
- Regular plans when direct is available. Roughly a percentage point a year in commission, which over twenty years is a large amount of money for distribution you may not be using.
- Buying insurance as investment. ULIPs and endowment policies bundle two products and do neither well. Term insurance plus a separate SIP is cheaper and clearer.
- No nominee registered. Costs nothing to fix and creates real difficulty for your family if you do not.
The pattern underneath
Four of the top five are about time, not selection
Stopping early, starting late, never increasing, wrong horizon. None of these is a fund-choice problem, and all of them cost more than fund choice does.
Which is worth noticing, because fund selection is where nearly all the attention goes — and it is also the part where a calculator, or this site, can help you least.
Questions people actually ask
Should I stop my SIP when the market is at an all-time high?
No. Markets spend a lot of their time near highs — that is what a long-term uptrend looks like — and waiting for a fall means sitting in cash while inflation runs.
If highs make you uncomfortable, that is a signal about your asset allocation, not your SIP date.
How often should I review my SIP?
Once a year is enough, and reviewing more often mostly creates opportunities to make mistake five. Check that the goal still applies, that the amount has risen with your income, and that the fund has not changed mandate.
Underperformance against peers over one year is noise. Over three or more, with no change in strategy explaining it, it is worth acting on.
Is it a mistake to have SIPs in five different funds?
Usually, yes — mostly because the overlap means you are paying active fees for something close to index exposure, and tracking five funds makes rebalancing harder than it needs to be.
Three or four with genuinely distinct mandates covers most needs.
What if I already made some of these mistakes?
Then the useful move is the boring one: restart what you stopped, raise what you never raised, and move short-horizon money out of equity. The arithmetic that makes delay expensive also makes today the best remaining day at any age.
Sunk cost is sunk. The next twenty years are not.
Where these numbers come from
- AMFI — mutual fund industry data and investor education
- SEBI — regulation and registered adviser search
- Income Tax Department — capital gains and interest taxation