Investment Fee Impact Calculator
Enter your starting amount, any yearly contributions, an assumed return and an annual fee. The calculator shows how much the fee reduces the value at the end, including the growth the fee takes away.
Added at the end of each year. Enter 0 for none.
Before fees. An assumption, not a guaranteed return.
Total yearly charge taken from your balance, such as an account, platform or fund fee.
- Value after fees
- $32,071.35
- Value without fees
- $38,696.84
- Lost to fees
- $6,625.49
- Total you put in
- $10,000.00
A 1% yearly fee on a 7% return over 20 years. The lost amount includes the growth the fees would have earned, so it can be larger than the fees paid.
How it is calculated
Each year, the balance grows by the return minus the fee, then receives any contribution:
B(t+1) = B(t) × (1 + r − f) + C
where r is the return before fees, f is the annual fee and C is the yearly contribution. The value without fees uses r alone. Fee impact is the difference between the two.
Example: $10,000 at a 7% return with a 1% fee for 20 years, and no contributions, is worth $38,696.84 without fees and $32,071.35 with the fee. The fee costs $6,625.49.
Assumptions and limitations
- The return is assumed to be the same every year. Real returns vary and can be negative.
- The fee is a single yearly percentage of the balance. Fixed fees, trading commissions, spreads and currency charges are not included.
- Taxes are not deducted. Tax-advantaged accounts can change the result.
- Contributions are made once a year at the end of the year.
- This is an estimate, not a forecast or a guaranteed outcome. Check a provider's official fee schedule before you decide.
What this calculator tells you
Investment fees look small each year, but they compound against you just as returns compound in your favour. This calculator shows how an annual fee, such as a fund's expense ratio or an advisory charge, reduces the value of an investment over time, compared with the same investment at a lower fee.
The calculator shows the value of the investment with and without the fee, and the difference between them. The gap is often much larger than the fee percentage suggests, which is the main reason to compare costs carefully.
How the fee is applied
The calculator treats the annual fee as a reduction in the return. If the gross return is 7% and the fee is 1%, the net return is 6%. The value after a number of years is the starting amount multiplied by one plus the net return, raised to the number of years. Adding regular contributions works the same way, with each contribution growing from the date it is made.
A worked example
Suppose you invest 100,000 for 30 years and the gross return is 7% a year. With a 0.1% fee, the net return is 6.9%, and the value after 30 years is about 739,000. With a 1% fee, the net return is 6%, and the value is about 574,000. The fee difference of 0.9 percentage points leaves you with roughly 165,000 less, which is more than the original investment.
Why small fees matter
The fee is charged every year, and the money it removes would have compounded in later years. Over short periods the effect is small. Over decades it can absorb a large share of the growth. This is why a fee difference that seems trivial in one year can dominate the outcome of a long savings plan.
The effect is strongest when returns are modest, because the fee takes a larger share of a smaller return. A low-return asset with a high fee can produce a far worse outcome than a higher-return asset with a similar fee.
What the calculator leaves out
Front-end loads, exit charges, transaction costs, platform fees and taxes are not included unless they are entered as part of the annual fee. Some fees are charged in a different form, such as a percentage of profit or a flat amount, so the figure may need converting to an annual percentage. The return is assumed to be fixed, which is not the case for real investments.
Testing the effect on your own plan
Enter the return you expect and your own contribution schedule, then run the calculation with and without your current fee. The gap shows the cost in money terms, which is easier to act on than a percentage. Reviewing this each year when fees or platforms change keeps the cost visible.
Remember that fees paid in early years have the longest time to compound against you. A cost that looks minor when you start can be the largest drag on a long plan, so it is worth checking before you commit.
Using the result
Use the calculator to compare the cost of similar investments, and to check whether a fee is justified by the service or the expected return. Look for the total cost of ownership, including all charges, and the ongoing expense ratio published for funds. A cheaper product with the same exposure often leaves more of the return with you.
Frequently asked questions
How does a fee reduce my return?
A fee of 1% a year lowers a 7% gross return to a net return of 6%. Because the fee is charged every year, the lost growth compounds over the whole period.
Why is the difference bigger than the fee percentage?
The money removed by fees would otherwise have earned returns in later years. Over long periods, this lost growth adds up to far more than the annual fee alone.
Does this include one-off charges?
Not unless you convert them into an equivalent annual figure. Front-end loads and exit charges should be checked separately, because they reduce the amount invested or withdrawn.
Is a higher fee ever worth paying?
It can be if the service or the expected return justifies it. Compare the net outcome after fees, and be sceptical of higher fees unless the advantage is clear and measurable.
Where do I find a fund's fee?
Funds publish an ongoing charge or expense ratio in their key information documents or fund reports. Check the total cost, including any platform or advisory charges on your account.