setting a personal investment policy statement

In short

I once watched a neighbor of mine build a fence without a plan, and every Saturday he changed his mind about where the gate should go. A personal investment policy statement is the plan for your money, written down on one or two pages before the weather turns. It names your goal, your time frame, how much ups and downs you can stomach, and what you will do when markets get rough. You wrote the purpose, so you are the one best placed to keep it. Sign it, date it, and tuck a copy where your spouse or a trusted friend can find it. Then look it over once a year, and only change it when your life changes, not when the headlines do.

The whole of it

What it is

A friend of mine keeps a cookbook with her grandmother's recipes, and what she prizes most are the handwritten notes in the margins. An investment policy statement works the same way. It is a short document you write for yourself that says why you are investing, what you expect, and how you will behave along the way. Professional money managers and pension boards use them, and the CFA Institute, a body for investment professionals, has published guidance on how to write one. There is no law that says a household needs one. You are free to write it on a legal pad.

Most of us decide our money habits in the heat of a bad week. A statement written in a calm hour gives that future, worried version of you something steady to read. You are not tying your own hands. You are leaving yourself a kind letter from someone who was thinking clearly.

The statement usually covers a handful of things. It states the purpose of the money, such as retirement or a child's schooling. It states the time horizon, which is the number of years until you need the money. It states your risk tolerance, which is how much of a drop you can sit through without losing sleep, and your risk capacity, which is how much of a drop your finances can truly absorb. These two are different, and I will say more on that below. It also sets a target mix of stocks, bonds, and cash, and the rules for adjusting that mix over time.

How it works

You have probably felt the pull to do something when the news turns ugly. The statement gives that pull a place to go. Before you act, you open the page and read what you decided when you were calm.

Start with the purpose and the date. Money needed in three years has a different job than money needed in thirty. Short money tends to need steadier places to sit, because a bad year leaves little time to recover. Long money can ride out rough stretches, but only if the owner truly rides them out.

Next comes the target mix. You pick a share for each kind of holding, such as 60 percent in stock funds and 40 percent in bond funds. Over time the market pushes those shares off target. Rebalancing means selling a little of what grew and buying a little of what lagged, to get back to your chosen shares. Your statement says when you will check, perhaps once a year, and how far off target the mix must drift before you act, perhaps 5 percentage points.

Then the statement lists the costs you are willing to pay. Fund fees, trading costs, and taxes all take a bite. Writing a ceiling next to each one keeps you honest. It also names who is responsible for what: who places the trades, who reviews the page, and who is told when it changes.

The numbers, and where to find yours

Plenty of the figures in your statement are your own, and you can find them without any help from the government. Your current balances sit on your account statements. Your fund fees appear in each fund's prospectus, which is the official document the fund must provide, under a line called the expense ratio. Your time horizon comes from your own calendar.

A few figures are set by law, and they change from year to year. The yearly contribution limit for a 401(k) is the current figure, which the official source publishes each year. The yearly limit for an IRA is $7,500 for 2026 (source, checked 10/4/2026). The age when required withdrawals begin is 73 for 2024 (source, checked 9/27/2026). Check the IRS website, irs.gov, for the current figures, since the site fills these in with their source and date. Your statement should say how much you plan to save toward those limits, and it should leave room for the numbers to move.

A worked example

Let me tell you about a woman named Carol Reyes, age 45. She earns $80,000 a year and wants to retire at 65. She has $120,000 saved and plans to add $9,600 each year. She sat down with a pot of coffee and wrote her statement.

Her horizon is 20 years, since 65 minus 45 is 20. Her yearly saving of $9,600 is 12 percent of her pay, because $9,600 divided by $80,000 is 0.12. She chose a mix of 70 percent stock funds and 30 percent bond funds. On her current $120,000, that means $84,000 in stocks and $36,000 in bonds, since 70 percent of $120,000 is $84,000 and 30 percent is $36,000.

She wrote a rebalancing rule too. She will check once a year in January. If any share has drifted more than 5 percentage points, she will move money back to target.

Now the test arrived. A rough year dropped her stock funds by 25 percent. Her $84,000 in stocks fell to $63,000, because 25 percent of $84,000 is $21,000, and $84,000 minus $21,000 is $63,000. Her bonds held at $36,000. Her total was $99,000, and stocks were now about 63.6 percent of it, since $63,000 divided by $99,000 is about 0.636.

Her old self might have panicked and sold. Her statement said otherwise. Her stock share had slipped below the 70 percent target by more than 5 percentage points, so the rule told her to buy stocks. To get back to 70 percent of $99,000, she needed $69,300 in stocks, since 0.70 times $99,000 is $69,300. That meant moving $6,300 from bonds into stocks, because $69,300 minus $63,000 is $6,300. She did exactly that. The page did the worrying so she did not have to.

Where it goes wrong

I have seen good plans fail in plain ways, and none of them make a person foolish. The first is a statement too long to read. If it runs ten pages, nobody opens it in a storm. Keep it to one or two.

The second is mixing up risk tolerance and risk capacity. A person may feel brave, yet have a small cushion and a shaky job. Brave feelings do not pay the rent. The statement should respect both what you can stand emotionally and what your finances can bear.

The third is never reading it again. Life moves. A new baby, a job loss, or a move changes the plan. Set a yearly date to review the page, and rewrite it when your life shifts. Skip the rewrite and the page goes stale.

The fourth is changing it in the middle of a panic. That defeats the whole purpose. A rule that bends every time the market sours was never a rule. If you truly want a change, wait a few weeks and sleep on it first.

Last is leaving out the costs and taxes. A plan that ignores fees and tax bills gives you a rosier picture than the real one. Write those in.

Questions to answer before you leave this page

What is this money for, and on what date will you need it? How many years sit between today and that date? How would you feel, and what would you truly do, if your balance fell by a quarter in a single year? Could your household bear that drop without missing a bill or selling in a hurry? What mix of stocks, bonds, and cash fits your answers, and how far off that mix will you let things drift before you rebalance? What are you willing to pay in fees and taxes, and who will check the page each year? Who else should hold a copy, so that a calm friend can remind you of your own words when you need them most?