Brokerage Fee Impact Calculator
See how brokerage fees and expense ratios drag on long-term investment returns.
What this calculator does
Investment fees look trivial and behave brutally. A percentage point taken annually does not cost you a percentage point — it costs you that amount plus everything it would have compounded into across every remaining year, which over decades becomes a very large number.
This calculator makes that visible. Enter a starting amount, an expected gross return, a time horizon, and any monthly additions, then compare the outcome against the same scenario with the return reduced by your total fee load. The gap between the two figures is the fee drag.
When to use it
Run it when choosing between funds with different expense ratios, when deciding whether an advisory relationship earns its 1 percent, and before consolidating old accounts. Seeing the dollar cost rather than the percentage tends to change decisions that the percentage alone never did.
It is also worth running before rolling over a 401(k). Old employer plans frequently hold expensive share classes with administrative fees layered on top, and quantifying the difference over the remaining decades usually makes the rollover decision obvious.
Understanding the inputs
Starting amount is your current invested balance. Annual return should be your expected gross return before any fees — around 7 percent nominal is a common long-term equity assumption, though it is an assumption, not a promise.
To model fees, run the calculation twice: once at the gross return and once at gross minus your total annual fee percentage. Add every layer — fund expense ratio, advisory fee, platform charge, and plan administration. Years should reflect your full remaining horizon, since fee drag grows non-linearly with time.
How is this calculated?
Net Return = Gross Return − Fees. With fees: FV_fees = P(1+r-fees)^n. Total Fee Drag = FV_no_fees − FV_fees.
A worked example
Take $100,000 invested for 30 years at a gross return of 7 percent. With no fees, it grows to $761,226. Now apply a total fee load of 0.75 percent, so the net return is 6.25 percent. The same $100,000 reaches $616,408.
The difference is $144,818, or roughly 19 percent of the fee-free outcome — surrendered for a fee that sounded like less than one percent. At a 1.5 percent total load the gap widens dramatically further, which is why the compounding of fees deserves the same attention as the compounding of returns.
Limitations and assumptions
This model assumes a constant gross return and a constant fee, neither of which holds exactly. Returns vary year to year and sequence matters, particularly once you begin withdrawing. Past returns do not predict future ones, and the flat-return assumption ignores volatility entirely.
It also ignores taxes, which can favor or penalize different account types, and it does not attempt to value what a fee buys — tax-loss harvesting, planning, or simply keeping you invested during a crash can be worth real money. Fee analysis is one input, not the whole decision, and this is not investment advice.
Common Questions
- How much do fees actually cost over 30 years?
- Far more than the headline percentage suggests. On $100,000 invested at 7 percent for 30 years, a 0.75 percent annual fee reduces the final balance from about $761,000 to roughly $616,000 — nearly $145,000 gone. The fee is charged on the whole balance every year, including the growth it already cost you.
- What is the difference between an expense ratio and an advisory fee?
- The expense ratio is charged inside the fund and deducted from its returns before you see them. An advisory fee is charged by whoever manages your account, commonly around 1 percent annually. They stack: a 1 percent advisor using funds averaging 0.5 percent means 1.5 percent a year in total.
- Is a 1 percent advisory fee reasonable?
- It is the industry standard and can be worth it for tax planning, behavioral coaching, and estate work. What it should not buy is fund selection alone. Over 30 years, 1 percent compounds into roughly a quarter of the final balance, so the value delivered needs to be substantial and specific.
- What is the difference between a 0.03 and a 0.75 percent fund?
- Often almost nothing in what they hold. Broad-market index funds now compete at 0.03 to 0.10 percent, while many actively managed funds charge 0.60 to 1.00 percent for exposure that tracks the index closely. SPIVA data consistently shows the large majority of active US equity funds underperforming their benchmark over ten years.
- Do zero-commission brokers really cost nothing?
- Not quite. Commission-free trading is often funded by payment for order flow, where your order is routed to a market maker who pays the broker. The cost shows up as marginally worse execution prices rather than a line item. For long-term investors the effect is small; for frequent traders it is not.
- What other fees should I watch for?
- Account maintenance fees, ACAT transfer-out fees typically running $50 to $100, mutual fund loads of up to 5.75 percent on some share classes, 12b-1 marketing fees inside funds, wrap program fees, and bid-ask spreads on thinly traded ETFs. Individually small, collectively meaningful.
- How do I find out what I am actually paying?
- Check each fund's expense ratio in its prospectus or on the fund page, then read your advisory agreement for the management fee. For a 401(k), the annual fee disclosure required under ERISA lists plan administration costs. Adding the layers together often produces a larger number than people expect.
- Are fees worth paying for better returns?
- Only if the outperformance is reliable, and the evidence says it usually is not. A fund must beat its benchmark by more than its fee just to draw level. Morningstar research has repeatedly found expense ratio to be among the strongest available predictors of future relative performance — lower is better.
- How does this apply to a 401(k) or IRA?
- The same arithmetic, over a longer horizon. Many 401(k) plans carry administrative fees on top of fund expenses, sometimes exceeding 1 percent in smaller plans. Rolling an old 401(k) into an IRA with low-cost index funds is often the single highest-value fee decision available to an ordinary investor.