How to use this calculator
- Enter initial investment, assumed effective annual gross return (%), annual fee on post-return balance (%), years.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
Annual fee timing is explicitly after annual returns. Constant rates, no deposits, withdrawals or tax. Real funds can charge fees on another schedule.
Worked example
Starting at 10,000, apply 8% annual growth and a 1% charge on each year’s post-growth balance. Net annual growth is 6.92%; compare ten years with the fee-free path.
What the result means
Separate direct fees paid from the ending-value difference that includes lost compounding.
Common questions
How is the calculation performed?
Each year apply gross growth, then deduct fee percentage from the post-return balance. Compare with the same gross-return path without fees.
What does the model leave out?
Annual fee timing is explicitly after annual returns. Constant rates, no deposits, withdrawals or tax. Real funds can charge fees on another schedule.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.