General investing

Expense Ratio Calculator

Divide a fund's annual fees by its assets to find the expense ratio, the yearly cost of owning a fund, shown as a percentage.

  • Free
  • No sign-up
  • Updated for 2026

Fees & assets

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Enter the annual fees and assets to see the expense ratio.

Worked example

With these example inputs:

  • Annual fund fees$1,500
  • Total assets$200,000

Expense ratio: 0.8%

  • Annual fees$1,500
  • Total assets$200,000

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What this expense ratio calculator does

This calculator finds a fund's expense ratio. You enter the annual fund fees and the total assets. The tool then shows the figure as a percent. It reveals how much of your money goes to fees. This is a key cost measure. Feel free to try a few scenarios. The result helps you compare funds.

What the expense ratio is

The expense ratio is a cost measure. It is the annual fund fees divided by the total assets. So it shows the yearly cost as a percent. A lower figure means cheaper fees. It is charged every year you hold the fund. It is widely shown by fund providers. It is shown as a percent.

How it is calculated

The steps are simple to follow. You take the annual fund fees. Then you divide by the total assets. You multiply by one hundred. That gives the expense ratio. The tool runs the numbers for you.

What the result tells you

The result shows the expense ratio. A ratio of nought point seven five percent means that share goes to fees. A higher percent means costlier fees. A lower one means cheaper fees. So it shows your yearly cost. It puts fees against assets. It is a clean cost signal.

Why the expense ratio matters

The expense ratio quietly eats your returns. You pay it every single year. Small fees add up over time. They compound against your gains. A lower ratio leaves more for you. It is easy to overlook. It is core to fund choice.

What a high or low ratio means

A high ratio means costly fees. More of your return goes to the fund. A low ratio means cheap fees. More of your return stays with you. So a lower ratio is usually better. Index funds often charge less. Active funds often charge more.

The expense ratio and your returns

The expense ratio drags on your long-term returns. A one percent fee sounds small. Over decades it costs a lot. It compounds against your money each year. So even a small cut helps. Lower fees can beat higher ones. Watch this number closely.

How to use it

Enter the annual fund fees first. Add the total assets next. Read the expense ratio as a percent. See how much goes to fees. Then change an input and retry. Compare a few funds. Use it to compare costs.

The limits of the expense ratio

The expense ratio has clear limits. It does not include all costs. Trading costs sit outside it. It says nothing about returns. A cheap fund can still lag. So weigh cost against performance. So read it with care.

Common mistakes to avoid

A common mistake is ignoring small fees. A tiny percent still adds up. Another is chasing the lowest fee. The cheapest fund is not always best. Some forget trading costs. Others judge cost without returns. Seeing the full picture helps you avoid them.

A final tip

Use the expense ratio to compare fund costs. Remember it is annual fees over total assets. A lower ratio leaves more for you. But weigh cost against performance. Small fees compound over time. Do not overlook this number. A careful check guides your choice.

Frequently asked questions

What is an expense ratio?

It is the share of your investment a fund charges each year to cover management and operating costs, expressed as a percentage of assets.

Why does a small expense ratio matter?

Fees compound over time. Even a fraction of a percent, charged every year for decades, can eat a meaningful slice of your final returns.