Investing · General formulas

Investment Fee Impact Calculator

Compare hypothetical investment balances with and without an annual fee using your own return and contribution assumptions. Use the example values or enter your own numbers to explore an estimate.

Currency formatting only—not an exchange-rate conversion. No country-specific tax or government rules are applied.

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USD · example
Additional assumptions in use
  • Alternative annual fee / MER: 0 %
  • Deposit frequency: Monthly at month-end

Basic mode retains the advanced assumptions shown here. Switching modes does not reset your values.

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Enter your details to see a personalized calculation, a simple projection, and the assumptions behind it.

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The PDF includes active input values and option labels, results, sources, model assumptions, and the schedule when available. Schedule periods follow the model: years, months, or actual payments.

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    Share assumptions, never dollar amounts

    Links include eligible rate, term or frequency assumptions only. Dollar amounts are never included. Recipients must enter their own amounts; the link will not reproduce your full financial scenario.

    HOW IT WORKS

    Calculation method

    Compound the assumed gross annual return at its monthly effective rate. Add the entered deposit monthly or at each year-end, then deduct each scenario's percentage fee at year-end. Compare identical portfolios with different annual fees, tracking cumulative fees and the resulting lost growth.

    KEEP IN MIND

    Assumptions & limits

    Source/rule review year: Not applicable — general mathematical model.

    RATE CONVENTION

    Compare like with like

    A nominal annual rate is not the same as an effective annual return. With nominal rate r compounded m times per year, the equivalent effective annual rate is (1 + r / m)m − 1. For example, 6% nominal compounded monthly is about 6.17% effective for a year before fees, taxes, or inflation.

    Contribution and withdrawal timing also matters: end-of-month deposits miss that month’s growth, while a beginning-of-period deposit earns for the full period. Compare tools only after matching the rate convention, compounding period, contribution timing, and fees; a displayed equivalent does not make distinct models identical.

    Read the compound-interest guide
    Investment Fee Impact Calculator | WealthMathPro