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Updated 2026-08-26 · Investing · Educational use only ·
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ETF Calculator

ETF investment growth accounting for expense ratio fee drag

Project ETF investment growth accounting for expense ratio fee drag across any time horizon, given starting balance and assumed return.

What this tool does

This calculator models how an exchange-traded fund investment grows over time, accounting for the ongoing cost of fund management. It compounds your initial investment and regular monthly contributions at your expected gross annual return, then subtracts the annual expense ratio to show net growth. The tool estimates your final balance, total contributions made, investment growth generated, cumulative fees paid, and your effective net return after costs. The expense ratio, expressed as a percentage of assets under management, typically has the largest impact on long-term outcomes, especially over extended periods. Results illustrate how a given set of inputs might play out; actual performance will vary based on market conditions and real fund expenses. This calculation assumes consistent monthly contributions and a steady expense ratio, and does not account for taxes, inflation, or changes in your expected return.

Quick answer: with the default values, the result is $339,175.87 (Final Balance). Adjust the values below for your own figures.

Enter Values

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Formula Used
Initial investment
Monthly contribution
Monthly return net of expense ratio = (gross return − expense ratio) ÷ 1200
Total months

Disclaimer

Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.

Fund growth with fee drag: how this calculator works

This calculator projects the future value of a fund-based investment (ETF, index fund, mutual fund, SIP, or any diversified pooled investment) given an initial balance, ongoing monthly contributions, an expected annual return, and an expense ratio. The expense ratio is subtracted from gross return before compounding, the same math that applies whether the product is branded as an ETF, index fund, or mutual fund.

How fee drag compounds over the horizon

A 0.1% expense ratio against a 1.5% one looks small in year one and compounds into a large gap over decades. How large depends on the horizon and on how much of the balance arrived as later contributions rather than sitting there from the start. On a balance left to compound at a 7% gross return with nothing added, moving from 1.5% to 0.1% leaves the ending balance about 32.1% higher over twenty years and 51.9% higher over thirty. Where regular contributions make up part of the balance those figures fall to about 19.8% and 33.1% at the contribution mix in the sample figures, because money paid in later has less time to be affected either way. Scaling the starting balance and the contribution together changes neither figure. On a 100,000 starting balance at 7% gross for twenty years with nothing added, a 0.1% charge leaves about 395,900 against 299,700 at 1.5%.

How to use it for different product types

Index fund: set the expense ratio to the figure in the fund prospectus. ETF: the same, taken from the fact sheet. Mutual fund: expense ratios are usually higher and may include load charges this calculator does not model. Monthly contributions only: set the initial balance to 0. The underlying arithmetic is identical across all four framings, which is why the calculator is product-agnostic.

What this tool does not model

Transaction costs (bid-ask spread, brokerage commissions), tax drag on distributions, front-end or back-end loads, currency hedging costs on foreign-listed products, and tracking error between an index and the fund following it. It also assumes the return and expense ratio hold steady across the period, though in practice both vary. Where the expense ratio exceeds the expected return the net rate turns negative and the balance declines: the growth row then reports a shortfall rather than growth, and the drag keeps rising against a zero-fee path that never stopped compounding, so as a share of a falling balance it climbs for as long as the horizon runs. The result is a projection, not a prediction.

Example Scenario

$10,000 plus $500/month at 8% net of 0.1% fees grows to $339,175.87 over 20 years.

Inputs

Initial Investment:$10,000
Monthly Contribution:$500
Expected Annual Return:8%
Expense Ratio:0.1%
Investment Horizon:20 yrs
Expected Result$339,175.87
Expected Result breakdown
Total Contributed$130,000.00
Growth Component$209,175.87
Fee Drag vs Zero-Fee Baseline$4,602.37
Fee Drag as Share of Balance1.36%

This example uses sample figures for illustration. Adjust the inputs above to match a specific situation and see how the result changes.

Sources & Methodology

Methodology

The calculator derives a net annual return by subtracting the expense ratio from the expected annual return, then applies two compound-growth calculations at that net rate: the initial balance grows by standard compounding over the horizon, and monthly contributions accumulate as an ordinary annuity with contributions treated as made at period end. The two components are added to give the final balance. Subtracting the charge from the return before compounding is an approximation of levying it on the balance each month; the two conventions diverge by about 0.009% of the final balance at a 0.1% charge over twenty years, rising to roughly 0.27% at a 2% charge over thirty, small across everything the tool accepts, though not a single figure. Fee drag is measured against a baseline applying the same gross return with no expense ratio at all, so it counts more than the charges actually levied: at the sample figures roughly 58% of the reported drag is charges paid, with the remainder the growth those charges would themselves have produced. That drag is then expressed as a share of the final balance rather than of the zero-fee baseline, 1.36% and 1.34% respectively at the sample figures, and where the expense ratio exceeds the expected return the share climbs for as long as the horizon runs, because the baseline keeps compounding while the balance falls. The model assumes a constant annual return and expense ratio throughout, and does not account for taxes, trading costs, market volatility, cash drag, load charges, or tracking error beyond the stated expense ratio.

Frequently Asked Questions

What expense ratio is reasonable?
Passive index funds and ETFs commonly charge far less than actively managed ones, and fund research such as Morningstar's annual fee studies tracks how those distributions have shifted over time. What the calculator shows is the arithmetic rather than a judgement: a lower expense ratio leaves a larger net return to compound. How much that is worth depends on the horizon and on how much of the balance arrived as later contributions — moving from a 1.5% charge to a 0.1% one at a 7% gross return leaves the ending balance about 32.1% higher over twenty years on a lump sum left alone, and about 19.8% higher at the contribution mix in the sample figures used on this page.
Does this include dividend reinvestment?
The calculator assumes total return, which includes dividend reinvestment. The annual return figure should represent total return (capital appreciation plus dividends reinvested), not just capital appreciation or just dividend yield.
Should I use historical returns or forward estimates?
Historical figures are observable and forward estimates are assumptions; the calculator accepts either and takes no view. A historical average is specific to the market and the period it was measured over, and figures quoted for one national equity market do not carry across to another. Conservative planning assumptions are often set below the historical figure for the same market.
How does this compare to mutual funds?
The compounding arithmetic is identical — the same formula runs whichever wrapper the product sits in. Two things differ in practice. Expense ratios on comparable mutual funds are often higher, which this calculator does capture through the expense ratio input. Some mutual funds also carry front-end or back-end sales charges, which are a separate cost from the expense ratio and which this calculator does not model at all; the ETF vs Mutual Fund Calculator covers that comparison.

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