The amount you invest in stocks depends on your age, how soon you need the money, and how much loss you can handle without panic-selling
There is no single right answer, because the right amount for you is not the right amount for someone else. A 25-year-old with 40 years until retirement can ride out a market crash. A 65-year-old living on their portfolio cannot. Someone who needs cash in two years should not own stocks at all. Someone who will not touch the money for 15 years can own mostly stocks and sleep fine.
The core trade-off is simple: stocks go up more over long periods, but they drop sharply and without warning. The longer your timeline, the more you can afford to own. The sooner you need the money, the less you should own.
Key Takeaways
- Your stock allocation should match your timeline — money you need within five years should not be in stocks, and money you will not touch for 20 years can be mostly stocks.
- Your comfort with loss matters as much as your timeline; if a 30 percent drop would make you sell in a panic, you own too much stock.
- A common starting point is to subtract your age from 110 or 120, which gives a rough percentage for stocks, but this is a beginning, not a rule.
- Bonds, cash, and other non-stock investments are not "boring" — they are the part of your portfolio that lets you stay calm when stocks fall.
- Rebalancing once a year keeps your allocation on track as stocks grow faster than bonds.
How your timeline shapes your stock percentage
The longer you can leave money untouched, the higher your stock percentage can be. This is because stocks have recovered from every crash in history, but only if you did not sell during the crash. If you sold stocks in 2009 at the bottom, you locked in a loss. If you held them, you made it back by 2013.
A rough framework: money you need within five years should be in bonds or cash, not stocks. Money you will not touch for 10 to 15 years can be 60 to 80 percent stocks. Money you will not touch for 20 years or more can be 80 to 100 percent stocks. These are starting points, not rules — your comfort level matters more than any formula.
The reason timeline matters is that stocks are volatile in the short run but reliable in the long run. A stock market crash that drops your portfolio 30 percent is a disaster if you need the money next year. It is a buying opportunity if you will not touch it for a decade.
Testing your actual comfort with loss
Many people think they can handle a 40 percent drop until it actually happens. Then they panic and sell, locking in the loss. Your real stock percentage should be the highest amount you can own without selling during a crash.
A useful test: imagine your portfolio drops 30 percent tomorrow. Would you stay calm and hold? Would you keep investing? Or would you feel sick and want to sell? If you would panic, you own too much stock. The right amount is the amount that lets you sleep and stick to your plan.
This is why bonds and cash matter. They are not exciting, but they are the part of your portfolio that keeps you from making a terrible decision when stocks fall. If 20 percent of your money is in bonds and stocks drop 30 percent, your total portfolio is down only about 24 percent — much easier to stomach.
Common allocation formulas and how to use them
The age-based formula is a simple starting point: subtract your age from 110 (or 120 if you are comfortable with more risk). The result is your stock percentage. At 30, this gives 80 to 90 percent stocks. At 60, this gives 50 to 60 percent stocks. At 70, this gives 40 to 50 percent stocks.
This formula works because it automatically reduces your stock exposure as you age and get closer to needing the money. It is not perfect — it does not account for how much money you have, whether you have a pension, or your actual comfort with loss — but it is a reasonable starting point if you have no better idea.
Another approach is the target-date fund, which is a single fund that holds stocks, bonds, and other investments mixed in the right proportion for your retirement year. If you plan to retire in 2055, you buy a 2055 target-date fund, and it automatically shifts from mostly stocks now to mostly bonds as 2055 approaches. This removes the guesswork and rebalancing work.
Why rebalancing keeps your plan on track
Stocks grow faster than bonds. If you start with 70 percent stocks and 30 percent bonds, and stocks rise 20 percent while bonds rise 3 percent, you now have 75 percent stocks and 25 percent bonds. You have drifted from your plan without meaning to.
Rebalancing means selling some of what has grown the most and buying more of what has grown the least. Once a year, you sell some stocks and buy some bonds to get back to your target. This forces you to sell high and buy low — the opposite of panic selling — and keeps your risk level where you intended it.
You do not need to rebalance monthly or obsess over it. Once a year is enough. Many people rebalance in January or when they make a new contribution to their account.
How much you have and whether you have other income matter too
If you have a pension or stable job income, you can afford to own more stocks because you have a safety net. If you are self-employed with uneven income, you may want to own less stock and keep more in cash or bonds.
If you have a large portfolio, a 30 percent drop is a lot of money, and that might make you uncomfortable even if your timeline is long. If you have a small portfolio, a 30 percent drop is smaller in dollar terms, and you might be fine with it. There is no shame in owning less stock if it means you will actually stick to your plan.
Similarly, if you have other goals — saving for a house down payment, a car, or a vacation — those funds should not be in stocks at all. Only money you will not need for at least five years should be in the stock market.
The mistake of trying to time the market
Some people try to own more stocks when the market is low and fewer stocks when it is high. This sounds smart but almost never works. By the time most people notice the market is low, it has already started rising. By the time they notice it is high, it has already started falling.
The simpler and more reliable approach is to pick an allocation based on your timeline and comfort, then stick with it. Rebalance once a year. Keep investing new money on the same schedule. This is called dollar-cost averaging, and it works because you buy more shares when prices are low and fewer when prices are high, without having to guess which is which.
Frequently Asked Questions
Should I own 100 percent stocks if I am young?
Only if you can truly handle a 50 percent drop without selling in a panic. Many young people think they can, then sell when it happens. A mix of 80 to 90 percent stocks and 10 to 20 percent bonds is safer and still gives you most of the upside. The bonds are insurance against your own bad decisions.
What if I need some of the money in three years?
Split it. Money you need in three years should be in cash or short-term bonds, not stocks. Money you will not touch for 10 years can be in stocks. This way you are not forced to sell stocks at a bad time because you need cash.
Do I need to own individual stocks, or can I just own funds?
Funds are simpler and safer for most people. A single stock fund or target-date fund gives you instant diversification — if one company fails, it barely dents your portfolio. Individual stocks require research and carry more risk. Start with funds unless you have time and interest in picking individual companies.
How often should I change my allocation?
Rebalance once a year to stay on track. Change your overall allocation only if your timeline or comfort level actually changes — not because the market went up or down. If you are 35 and planned to retire at 65, you should own roughly the same stock percentage at 40 as you did at 35, just rebalanced.
What if I inherited money or got a bonus — should I invest it all at once?
You can, or you can spread it over several months. Investing it all at once means you might buy at a high point, but you also might buy at a low point — over time, it averages out. Spreading it over time feels safer but can mean missing gains. Either way works; pick whichever you will actually stick with.