How to use this calculator
- Enter your Initial investment and Monthly contribution.
- Set the Return before fees you expect.
- Enter the Annual fee: the fund expense ratio plus any advisory fee, as one percentage.
- Choose the Years, then read Lost to fees and compare the values with and without fees.
Why small fees add up
Fees are charged on the whole balance every year, whether the investment gained or lost. They reduce not only today's balance but also all the future growth that balance would have earned. A fee works like a permanent cut in your return.
net return = gross return − annual fee- gross return = yearly return before fees
- annual fee = expense ratio plus any advisory or platform fee
- balance next month = balance × (1 + monthly rate) + contribution
The calculator grows your balance twice month by month: once at the return before fees, and once at the return minus the fee. The difference is the cost of the fee.
Example: $50,000 plus $500 a month for 30 years
At a 7% return with no fees the balance reaches $965,339. With a 1% annual fee it is $774,431, so fees take $190,908, or 19.78% of the final value.
Look at the same case with different fee levels: 0.1% leaves $944,146 (a loss of $21,193), 0.5% leaves $864,231 (a loss of $101,108), and 2% leaves $623,785, a loss of $341,554, over a third of what you could have had.
What to compare
Look for the total cost: the fund expense ratio, any advisory fee, platform or account fees, and trading costs. A fee difference of 0.5 to 1 percentage point is common between low-cost index funds and actively managed products.
Higher fees are worth paying only if they buy something you cannot get cheaper: advice that changes your behavior, planning, or a service you value. Paying more does not reliably buy higher returns.
How to use the result
Add up all the fees you pay, then run the calculator at your current fee and at a cheaper alternative. The gap between the two final values is what switching could be worth, before any tax on selling. Project the contributions in more detail with the compound interest calculator and check what is left after inflation with the real rate of return calculator.
Ways to pay less
- Compare expense ratios of funds that track the same index.
- Ask what your advisory fee covers and whether a flat fee is cheaper.
- Avoid frequent trading, which adds costs and, in taxable accounts, tax.
- Check account, platform and withdrawal fees, not just the fund fee.
Assumptions and limits
The return is a constant yearly rate with contributions at each month end, and the fee is deducted as a reduction in return. Real returns vary, and fees may be charged differently. Taxes, inflation and trading costs are not modelled, and past fees do not guarantee future ones.
Frequently asked questions
How much does a 1% fee cost over 30 years?
It depends on the balance and return. In the default example it removes about 20% of the final value, nearly $191,000.
What is a good expense ratio?
Lower is better for the same exposure. Broad index funds are usually among the cheapest options, so compare against funds that track the same market.
Do fees apply even when returns are negative?
Yes. Fees are charged on the balance regardless of performance, which makes losses slightly larger.
Is a financial adviser worth the fee?
It depends on what you receive: planning, discipline and tax advice can have value. Ask for the total cost in dollars and what it covers.