Compound Lane · Compare Two Funds
Fund A or Fund B?
Pretend you're choosing between two real funds. Enter their expense ratios and your scenario — the calculator shows how the fee alone plays out in dollars, with structure as context.
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Projected balance at year 30
Fund A$—
Fund B$—
Fee drag alone$—
Here's why
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— Same contributions, same assumed return — the only difference is the expense ratio. Source & verification date →
Your next step
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Where this fits
Assumptions & methodology
Future value with fee = monthly compounding at (return − fee). Fee drag = FV at lower fee − FV at higher fee. Structure labels are context and do not affect the math. Projections are scenarios, not guarantees.
For a 10/20/30-year fee view, try Fee Drag or ETF vs Mutual Fund for structure trade-offs.
Education, not advice: This tool is for education only and is not personalized financial advice. Expense ratios are one factor — also consider tracking difference, taxes, and minimums.