Why small fees add up
Fees are charged on your whole balance, every year. As your investments grow, so does the amount taken — and each dollar removed can no longer compound. With $10,000 plus $500 a month for 25 years at 7%:
- At 1% a year, fees cost about $71,143 (15.4% of the no-fee result).
- At 0.07% a year, they cost about $5,446 (1.2%).
The difference — about $65,697 — comes from nothing but cost. Same investments, same contributions.
How this calculator works
Your balance grows each month at the return you set, minus the annual fee divided by 12. The total cost is the gap between that result and the same plan with no fee, split into the fees taken directly and the growth those fees would have earned.
Lowest-cost ETFs in our list
| SPYL · S&P 500 | 0.03% |
| VOO · S&P 500 | 0.03% |
| VTI · CRSP US Total Market | 0.03% |
| IVV · S&P 500 | 0.03% |
| BND · Bloomberg US Aggregate Float Adjusted | 0.03% |
| VXUS · FTSE Global All Cap ex US | 0.05% |
Fees from our fund data; always confirm on the provider's factsheet.
Frequently asked questions
What is an expense ratio (TER)?
The total expense ratio is the yearly fee a fund charges to run itself, shown as a percentage of your investment. It's taken from the fund automatically, so you never see a bill — it simply shows up as slightly lower returns.
Is a 1% fee a lot?
Over a long time, yes. On $10,000 plus $500 a month for 25 years at 7%, a 1% yearly fee costs about $71,143 — roughly 15% of what you'd otherwise have. The same plan at 0.07% loses about $5,446.
Why is the cost bigger than the fees I actually pay?
Every dollar taken in fees stops growing. The calculator shows both parts: the fees taken directly, and the growth that money would have earned if it had stayed invested. Together they're the true cost.
What fees should I include?
Everything charged as a percentage of your balance: the fund's expense ratio, any platform or account fee, and any adviser fee. One-off trading commissions and currency conversion costs are extra and not modelled here.
Are cheaper ETFs always better?
Not automatically. Two funds tracking different indexes aren't directly comparable, and things like domicile, tax and tracking quality matter too. But between two funds holding the same thing, the cheaper one usually wins over time.