Size Does Matter (For Your Expense Ratio)

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Whether you are managing your investments by yourself or getting help, you need to understand one critical concept, the expense ratio of your investments. Every mutual fund and exchange-traded fund (ETF) has an expense ratio, and keeping it as small as possible is key to your long-term financial success. Size does matter.

What is an Expense Ratio?

An expense ratio is the percentage of a fund’s assets that is used for expenses. In other words, if you invest in a mutual fund with a 1% expense ratio and that fund makes 10%, you’ll only get a 9% return on your investment because 1% goes to pay expenses. The less of your return you use to pay expenses, the more you get to keep.

What is an average expense ratio? An average stock mutual fund has an expense ratio of about 0.60%, but the expense ratios for mutual funds that are similar in their composition can vary wildly. For example, if you look at a list of Standard & Poor 500 index funds offered by investment companies, you’d find low expense ratios like 0.03% and as high as 1.36% (or even higher). While 1.33% does not seem like that large of a difference, keep in mind that costs last forever and that small differences compounded over years will cost you a lot of money. That is one of the major benefits of the TSP – its industry leading low cost – where nearly all the funds have expense ratios of 0.04%.

Love Your Grandparents

Let’s pretend that when you are 25 years old your grandparents give you $10,000 to invest in an S&P 500 index fund for 50 years, during which you earn a 9.5% return. If you invested in an index fund with the 1.36% expense ratio, you would have $500,000. That sounds pretty good! However, if you invested in a low cost fund with a 0.03% expense ratio, you would have $921,000.

That 1.33% difference in the expense ratios cost you $421,000!

Small differences in expenses can make huge differences in long-term investment returns, so you need to pay attention to the expense ratios of your investments.

This difference is even more dramatic when you compare actively managed funds to passively managed index funds. Because actively managed funds have higher expense ratios than index funds, it is very difficult for an active manager to beat his/her comparative index over the long-term. This is why I invest 100% in index funds, like they have in the TSP.

Shop Around

When you are picking your investments, keep in mind that you can’t control what happens to the market, but you can control which investments you choose and the expenses that they charge. Any time you are looking to invest in a mutual fund or ETF, you should search for similar funds and compare expense ratios, which you should try to keep below 0.5% (or even 0.25%, if possible).

When investing outside of the TSP, make sure that at a minimum you take a look at the Vanguard version of the investment you are considering since their expense ratios are the lowest in the industry and they never charge extraneous fees, like loads.

There is no reason to pay more expenses for what is essentially the same investment product. The size of your expense ratio matters. It could cost you A TON of money over the long-term.

2 thoughts on “Size Does Matter (For Your Expense Ratio)

    LT David Frey said:
    December 2, 2020 at 09:02

    Thank you, sir. You beat this drum so much I finally dug into my Roth IRA to discover it was sitting at a little over 1% (TD Ameritrade managed by Creative Planning). I just finished a transfer of both my and my wife’s Roth IRAs to Vanguard Life Target funds…. at 0.15%…. Considering I am in my 30’s….I call that a win.

    V/r, LT Frey



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