I'm 65 Years Old. Is It Too Late to Invest?

You'll often hear that it's best to start investing your money at a young age so that it's able to grow into a notable sum over time. Case in point: The stock market has delivered an average annual return of 10% over the past 50 years, as per the S&P 500 index's performance. Investing $10,000 at age 25 would therefore leave you with a balance of almost $729,000 in your brokerage account if we were to apply that same 10% return over your 45-year investment window.

But the older you are, the more careful you have to be when it comes to investing in stocks. That's because once you're near or at retirement age, the investments you have might need to serve as an income source so you can pay your bills in the absence of having access to a paycheck. And you don't want to run into a situation where you have to keep cashing out investments at a loss to access the cash you need to pay your expenses.

That's why going heavy on stocks later in life isn't necessarily the best bet. But if you're 65 and on the cusp of retirement, it's absolutely not too late to invest your money.

It's all about the having the right asset allocation

When you're 25, 35, or 45 and are looking to invest, it's actually a good idea to keep the bulk of your portfolio in stocks. That's because you want your portfolio to generate the highest possible returns at a time when you're not close to having to tap that money. But as retirement nears, it's a good idea to shift away from stocks to some degree and move toward less volatile investments, like bonds.

As such, if you're 65 years old and are gearing up to invest for the first time, you don't want to put 100% of your money into stocks. That's because you might need that cash soon enough to pay your living expenses. But it's also not unreasonable to put half of your money into stocks and the other half into bonds.

Bond values don't tend to swing as wildly as stock values. So let's say you have a portfolio that's split evenly between stocks and bonds. If the stock market tanks and you need money, it may be that the bond portion of your portfolio hasn't lost value at all. So in that case, you'd just sell your bonds if conditions aren't great for selling stocks.

You don't want to steer clear of stocks completely

Even though you don't want to take on too much risk in your portfolio later in life, it's generally a good idea to hold onto some stocks in retirement. That way, the stock portion of your portfolio can continue to generate stronger returns than the bonds portion (which is likely to happen, based on how the stock and bond markets have performed historically).

As far as finding the right percentages of stocks goes, one rule of thumb you can use is to subtract your age from 110. If you're 65, that brings you to 45 -- meaning, you can consider keeping 5% of your portfolio in stocks at that age. If you're 70, you'd look at sticking to 40% stocks.

Of course, there's wiggle room with this formula, and it's really just a way to get started. And for many older investors, a 50-50 split of stocks and bonds is what's preferred throughout retirement, and that's fine, too.

The point, though, is that it's never too late to start investing your money. And you certainly shouldn't assume that stocks are off the table, even if you're getting started later in life.