What Is a Good Expense Ratio?

The fee you pay every year, forever, on everything

An expense ratio is the percentage of your investment that the fund skims off each year to run itself. A fund with a 0.50% expense ratio takes $5 a year for every $1,000 you hold — not once, but every year, on the whole balance, in good markets and bad. It never appears as a bill or a line item. The fund's published return is simply a little lower than it would have been, every single day.

Because the charge looks tiny, most investors never do the one calculation that matters: what that percentage compounds into over a working lifetime. Compounding, as any reader of our compound interest guide knows, does not care whether it is working on returns or on fees. It amplifies both.

The 30-year fee table

Invest $100,000 for 30 years in a market returning 7% a year before fees. Only the expense ratio changes:

Read the last row slowly. A 1% annual fee — the kind of number that sounds like a rounding error in a sales brochure — consumes almost a quarter of your ending wealth. And notice the subtlety in the mechanism: the fund only ever took 1% a year, roughly $1,000 in year one. The true cost is nearly 190 times that first-year skim, because every dollar removed in fees was a dollar that stopped compounding for you and started compounding for someone else. Fee drag is not the fees you paid. It is the growth on the fees you paid.

The same mathematics runs through a monthly saver's plan. Save $500 a month for 30 years at a 7% gross return and you finish with $609,985. Pay 0.5% in fees and the same saving habit ends at $553,089. Pay 1% and it is $502,258 — the fee has quietly consumed $107,727, more than a fifth of everything you ended with.

See it with your own numbers

Everything above, live. Change the numbers to match your own situation:

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So what counts as "good"?

Fees buy different things in different wrappers, so judge each category against its own peers:

• Broad stock-market index funds and ETFs: 0.03%–0.10% is excellent, and easy to find from the big providers. Under 0.20% is perfectly respectable. Above 0.40% for a plain index tracker, you are being overcharged for a commodity product.
• Target-date and multi-asset funds: roughly 0.10%–0.40% is the fair range. You are paying something for automatic rebalancing and the glide path — a real service — but not 1% worth.
• Actively managed funds: 0.50%–1.00% is typical. Here the fee is a bet: the manager must beat the index by more than the fee, every year, after costs, for you to break even against the tracker. Decades of scorekeeping (S&P's SPIVA reports) show most active funds fail that test over 10–15 year periods — which is why the burden of proof sits on the expensive fund, not on you.
• Workplace pension and 401(k) menus deserve a special look: the same index fund can cost several times more inside an old employer plan than on the open market. You cannot always leave — and the employer match usually dwarfs the fee — but know your number.

A useful conversion for any fund you own: over a 30-year holding period, every 0.10% of expense ratio costs you roughly 2.5–3% of your final pot. Multiply your fund's fee by that rule before deciding it doesn't matter.

The fees that aren't in the expense ratio

Before you go hunting, one warning: the expense ratio is the biggest layer of cost, but not the only one. Depending on how you invest, some or all of these can stack on top:

• Platform or account fees — the broker or pension provider's own charge, often 0.25–0.45% a year on top of the funds inside.
• Advice fees — an ongoing adviser commonly charges around 0.5% a year. That may be money well spent (see below), but it belongs in your total.
• Trading costs inside the fund — commissions and spreads the fund itself pays when it buys and sells, plus the bid–ask spread you pay when trading ETFs.

Add them honestly and the comparison that matters is all-in against all-in. A 0.20% fund on a 0.35% platform with a 0.50% adviser is a 1.05% total cost — which, from the table above, is a quarter of your ending wealth over 30 years. Investors are often shocked to discover their "cheap index fund" lives inside an expensive sandwich. Your 60-second audit: find the fund's expense ratio, your platform's percentage charge, and any advice fee, and add the three numbers. That sum — not any single layer — is your real expense ratio.

When a higher fee can still be the right choice

Fees are a cost, not a sin. Some exposures genuinely cost more to provide — small-company and emerging-market funds, for instance — and a 0.35% fund that gives you diversification you would otherwise skip beats a 0.03% fund concentrated in whatever is fashionable. Advice, where it is actually advice (a human who stops you selling in a panic is worth more than any basis point), is also legitimately paid for through product charges sometimes. And inside an employer plan, contributing enough to capture the full match at a 0.8% fee beats contributing nothing at all, by an enormous margin.

The rule is not "never pay fees." It is: know what you are paying, know what it compounds to, and make the expensive fund justify itself. If the justification is a logo, a star rating, or a good last three years — the table at the top of this page is your answer. Fees are the one part of your return that is announced in advance, charged with total certainty, and entirely within your control. In a pursuit full of unknowables, that makes them the first thing to get right.

Your one action from this guide: tonight, find the three numbers — fund expense ratio, platform charge, advice fee if any — and add them up. If the total is under 0.25%, your costs are well handled and your attention is better spent on savings rate. If it is over 0.75% and most of it is buying plain index exposure, you have found the single highest-certainty pay rise available to you as an investor: same market, same risk, smaller skim.

All figures: author's calculations — $100,000 lump sum and $500 monthly contributions at a 7% gross annual return over 30 years, fee applied as a reduction in the annual return. Real-world fund returns are lumpier, but fee drag applies in every year, including the bad ones.

Frequently asked questions

What is a good expense ratio for an index fund?

For a broad stock-market index fund, 0.03% to 0.10% is excellent and widely available; anything under 0.20% is fine. Once an index fund charges 0.40% or more, you are paying active-fund prices for a product that costs the provider almost nothing to run — shop around.

How much does a 1% fee really cost?

On $100,000 growing at 7% for 30 years: a fee-free investment reaches $761,226, while the same investment with a 1% annual fee reaches $574,349. The fee consumed $186,876 — 24.5% of the wealth you could have had — because every dollar taken in fees also loses its own future compounding.

Is a higher fee ever worth paying?

Sometimes — for genuinely different exposure (some bond, small-cap or international funds cost more to run), for advice bundled into the product, or in workplace plans where you have no choice and the employer match dwarfs the fee. What is rarely worth it is paying 0.75%+ for a fund that closely tracks an index you can buy for 0.05%.

Where do I find my fund's expense ratio?

In the fund's factsheet or prospectus, in your broker's fund overview, and on your annual statement. Look for the 'ongoing charges figure' (OCF) in the UK or 'net expense ratio' in the US. If a platform cannot show you the number in two clicks, that is information in itself.

Do fees matter more than returns?

You cannot control returns, and last year's winner is close to random. Fees are one of the few inputs that are known in advance, persist year after year, and compound against you with the same mathematics that compounds returns for you. Controlling them is the highest-certainty improvement most investors can make.

Keep learning

• Expense ratio
• Index fund
• Mutual fund

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