Building your investing plan
The answer
An investing plan is a page with 9 lines on it, written before you need it, and dated.
Its purpose is not to improve your returns directly. Its purpose is to make the decisions in advance, in a calm month, so that the decision in a frightening month is already made and only has to be executed.
Why this costs you money
Ask somebody what return their portfolio has produced and they will give you a number. Then calculate it properly and the number is almost always different, and almost always lower.
The reason is not dishonesty. It is that people remember their best holding and forget the money that sat in cash for 8 months, the position that was sold at a loss and never spoken of again, and the fact that most of the money arrived recently and therefore has not compounded for as long as they think.
This matters because every decision you make depends on a number you have never calculated. You cannot tell whether picking stocks has been worth the hours, because you have not compared it with the index over the same period. You cannot tell whether your costs are acceptable, because you do not know the figure they are being subtracted from.
Most people discover 2 things when they finally calculate it. Their return is lower than they believed, and a large part of the gap is not the market. It is money that was not invested, decisions made under stress, and costs.
A plan removes those 3 things, and none of them is fixed by better stock selection.
How it works
A plan has 9 lines. Each one answers a question that would otherwise be answered by your mood.
1. The goal and the date. Not "grow my wealth". A named purpose and a year. "Retirement in 2049." "A house deposit in 2031." The date decides everything below it.
2. The monthly amount. The figure that leaves your account automatically, every month, on a fixed date. Automatic matters more than large. A smaller amount that survives 240 months beats a larger one that stops in month 14.
3. The asset allocation. What percentage in equities, what percentage in bonds or fixed deposits, what percentage in cash. This is the largest single decision in the plan and it is decided by the date in line 1, not by the market. Money needed within 3 years does not belong in equities at all.
4. The emergency fund. Money you can reach in 24 hours, held outside the investment portfolio, sized in months of expenses. Usually 6 months, more if your income is irregular. This line exists to stop a job loss from becoming a forced sale of equities at a low price. It is the cheapest protection in the plan.
5. The default investment. What the money buys when you have no strong view, which is most months. For most people the honest default is a broad, low-cost index fund. The line should also say what must be true before you buy anything else: "I will hold individual stocks only where I have completed the end-to-end analysis and written the sell condition."
6. The position size limit. The maximum percentage of the portfolio in a single company, and the maximum in a single sector. Written as numbers.
7. The review schedule. A date, 2 or 4 times a year, when you check the holdings against their written reasons and rebalance anything that has grown past its limit. Reviewing more often than this does not add information. It adds transactions.
8. The fall rule. What you will do when the portfolio falls 30%. Written now, in the current calm, because you will not be able to write it then. For most plans the correct sentence is "continue the monthly amount and change nothing else", and the value is that you wrote it before it was tested.
9. The date and signature. A plan without a date is a wish. The date lets you read it in 3 years and see what you actually believed before the outcome was known.
That is the whole plan. It fits on one page. If it does not fit on one page, it will not be followed.
What it tells you, and what it does not
A plan tells you what to do in a month when you do not know what to do. That is its entire function, and it is worth more than it sounds, because those are the months that decide the decade.
It does not tell you what returns you will get. A plan does not improve the market. It improves the fraction of the market's return that reaches you, by removing gaps in contribution, forced sales and decisions made in fear.
It also does not remove the need to think. Line 5 requires you to decide what "good enough to own individually" means. Line 3 requires a judgement about your own tolerance, which you will only discover the first time your money falls 30%.
And a plan is not permanent. It should change when your circumstances change: a new job, a child, a house, a change in the date in line 1. It should not change because the market fell, and the difference between those 2 reasons is exactly what the dated version is for.
The decision rule
Before making any investment decision, check it against the page.
- Is this within the size limit in line 6? If not, the decision is already
made.
- Does the money have a job in line 1? If it is needed within 3 years, it is
not equity money.
- Is the emergency fund in line 4 intact? If not, that gets filled first,
before any new position.
- Would this decision be different if the price had moved the other way this
week? If yes, it is not a decision. It is a reaction.
Try this now
Five minutes for steps 1 to 4, which almost nobody has ever done. Step 5 takes another 10, and can wait until this evening.
- Before you calculate anything, write down what you believe your annual return has been over the last 3 to 5 years. One number. Keep it.
- Open your broker or fund platform. Many now show an XIRR or "annualised return" figure for the whole portfolio. XIRR is the annual rate that accounts for money arriving on different dates, which is why it is the right measure.
- If your platform does not show it, download the transaction statement and use a spreadsheet. Put every deposit as a negative number with its date, every withdrawal as a positive number with its date, and today's total portfolio value as a final positive number with today's date. Then use the XIRR function.
- Look up the total return of a broad index over the same period. Compare.
- Now open a blank page and write the 9 lines above. Put today's date at the bottom.
What you should see. The gap between step 1 and step 2 usually runs in the same direction: you believed you did better than you did. That gap is not a moral failure. It is what memory does with a portfolio.
The comparison in step 4 is the one that changes behaviour. If your XIRR is below the index over the same period, the hours you spend picking stocks have a negative wage, and line 5 of your plan should say so. If it is above the index, check the period. Three good years is not evidence. Ten is the beginning of some.
Keep the page. Read it again on the same date next year, before you change anything.
Three real cases
1. The Indian small-cap cycle, 2017 into 2018 — the plan that was written during the good part Indian small-cap and mid-cap shares rose strongly through 2017, and money moved into small-cap funds at record levels. Several things then arrived together in 2018: SEBI's mutual fund categorisation circular of 6 October 2017 forced funds to hold stocks matching their stated category, long-term capital gains tax on equities was reintroduced in the Union Budget of 1 February 2018, additional surveillance measures were applied to many small companies, and IL&FS defaulted on payments in September 2018, leading the government to supersede its board in October 2018. Small-cap indices fell heavily during 2018 while the main large-cap index did not. Investors whose plan said "small-cap funds, because they have done well" had no line to consult when the same funds did badly.
2. The Indian small and mid-cap correction, late 2024 into 2025 — the same shape, 7 years later After a long rise, Indian small-cap and mid-cap shares corrected sharply from their highs in the second half of 2024 and into 2025, falling considerably more than the large-cap index. In early 2024, ahead of this, industry bodies had asked mid-cap and small-cap funds to publish stress test results showing how many days it would take to liquidate part of the portfolio, and the regulator had spoken publicly about froth in these segments. The cycle is not the lesson. The lesson is that the warnings were public and dated, and that a written allocation limit would have acted on them automatically, while an unwritten intention did not.
3. The fall and recovery of 2020 (both countries) — the fall rule, tested The S&P 500 peaked on 19 February 2020 and reached its low on 23 March 2020, about 33 trading days later, falling roughly a third. It regained the February level in August 2020. Indian indices fell further, reached their low on 24 March 2020, and recovered to their previous highs during November 2020. Investors who had written line 8 in advance continued their monthly contributions through March, April and May, and bought at the lowest prices of the cycle without making a single decision. Investors who had not written it made the decision in the worst possible week, in the worst possible emotional state, using the worst possible information.
The question that resolves it
A novice asks: what should I buy?
An expert asks: what does my page say I do this month, and has anything happened that changes the page rather than my mood?
The first question has a new answer every week. The second has an answer that changes about once every 3 years, and that stability is where the return comes from.
What would make this wrong
If plans did not matter, then investors with written rules and investors without them would achieve returns close to the funds they hold. They do not. The measured gap between fund returns and investor returns is consistently negative and is caused by timing, which is exactly what a plan removes.
The honest limits.
A written plan can be wrong. An allocation that is too aggressive for your temperament is still too aggressive after you write it down, and you will discover this only in a real fall. Revising the allocation once, after learning something about yourself, is not the same as abandoning it.
A plan also cannot cover every situation, and one that tries becomes a document nobody reads. Nine lines is close to the maximum that survives real life.
And a plan is worth nothing if the underlying decisions are poor. Automatic monthly contributions into an expensive, badly chosen fund produce a disciplined loss. Discipline amplifies the plan; it does not fix it.
The XIRR calculation has a limit too. It measures what you earned given when your money arrived. If most of your money arrived last year, your XIRR is mostly a statement about last year, not about your skill.
In India
The Indian mechanism for line 2 is the systematic investment plan: a fixed amount debited automatically each month into a mutual fund scheme. It is the most useful piece of financial infrastructure available to an Indian retail investor, because it converts a monthly decision into a standing instruction. Monthly SIP contributions and the number of SIP accounts have grown steadily over the past decade.
Two India-specific points belong in the plan itself.
Use direct plans. The regular plan of a scheme pays a distributor commission out of your returns every year. The direct plan of the same scheme holds the same portfolio without it. Line 5 of the plan should say "direct plans only".
Write the tax rule into line 7. Selling listed equity within 12 months attracts short-term capital gains tax at 20%; after 12 months, long-term gains are taxed at 12.5% with the first ₹1.25 lakh of such gains in a financial year exempt. A review scheduled after the 12-month mark, and deliberate use of the annual exemption, reduces the cost of rebalancing.
For line 4, the emergency fund, the usual Indian choices are a savings account, a liquid fund or a sweep-in fixed deposit. A liquid fund is not the same as cash: in April 2020 several debt schemes were wound up because they could not sell their bonds quickly enough to meet redemptions, and investors could not withdraw. The emergency fund must be the part of your money whose availability you have never had to think about.
Category definitions are fixed by SEBI's circular of 6 October 2017, so line 3 can name a category and mean something specific. That is not true in every market.
In the United States
The American mechanism for line 2 is payroll deduction into a 401(k), which is automatic in the strongest sense: the money never reaches your bank account. Many employers match a percentage of contributions, and an unclaimed match is the only guaranteed return anywhere in the plan. Line 2 should always start by capturing the full match. Beyond that, an Individual Retirement Account allows further tax-advantaged contribution, and a taxable brokerage account holds anything above those limits. Limits are set annually.
Three American features change the shape of the page.
Account location matters as much as asset allocation. The same portfolio held in a 401(k), a Roth IRA or a taxable account produces different after-tax outcomes. Line 3 should say what goes where, not only what percentage goes into what.
Target-date funds implement lines 3 and 7 automatically. A single fund holds a whole allocation and shifts it towards bonds as the target year approaches, rebalancing on its own. For many investors this is a better plan than one they would write themselves, because it cannot be skipped.
Tax-loss harvesting is a real, small edge. Up to $3,000 of net capital loss can be deducted against ordinary income each year, with the remainder carried forward. It belongs in line 7, at the review, not as a reason to trade.
Where they differ, and what that tells you
The 9 lines are the same. Line 3, the allocation, has to be written differently, because the tax shelter is in a different place.
An American plan is built around accounts. The first question is not what to buy but which account to buy it in, because the account decides the tax on decades of growth. An American who gets the account order right and the fund choice roughly right will beat an American who gets the fund choice exactly right in the wrong account.
An Indian plan has no general-purpose equivalent shelter for equity investing. Contributions to the Employees' Provident Fund, the Public Provident Fund and the National Pension System have their own rules and limits, and outside those, the default is a taxable account. So an Indian plan is built around products and costs instead: direct plans, index funds, holding period, and the annual long-term gains exemption.
What that tells you is that the first hour of work is different in each country. In the United States, spend it on account order and the employer match. In India, spend it on plan type, expense ratio and holding period.
Imported plan templates almost always assume the American account structure. Used unchanged in India, they optimise something that does not exist and skip the things that do.
Carry this
- Nine lines, one page, dated. Goal, amount, allocation, emergency fund, default, size limit, review, fall rule, date.
- Calculate your real return with XIRR before you decide anything. Compare it with the index over the same period.
- Money needed within 3 years is not equity money, whatever the market is doing.
- Write the fall rule while nothing is falling. That is the only time you can.
- Change the plan when your circumstances change, never because the market moved.