Tracking portfolios across 50+ brokers.
Hidden Investment Fees Calculator
Every year you don't check, hidden fees silently drain thousands from your portfolio. See what they're really costing you — before it's too late.
Model the true cost of investing with broker-specific assumptions for custody fees, FX spreads, fund costs, and trading commissions — then compare that estimate to what you could keep by investing more efficiently.
Trusted by 2,400+ investors tracking portfolios worth over €180M across 50+ brokers.
Calculator Inputs
Use your own portfolio details to replace the example and see a broker-specific estimate.
Estimated Results
Example result
Based on a €50,000 portfolio, a 7.00% annual return, a 20-year horizon, and a mid-cost broker model. Your own results will replace this as soon as you enter your numbers.
Estimated portfolio value lost to fees
€21,940
Example: €21,940 lost to hidden fees over 20 years.
Estimated annual investment fees
€375
Total annual fee rate
0.70%
Return before fees vs estimated return after fees
Before fees: €143,484 (286.97%)
After fees: €121,544 (243.09%)
Projected value without fees: €193,484 | with fees: €171,544
Broker model used: Saxo Bank
Fee breakdown by category (annual estimate today)
- Broker/platform fee: €125
- Fund/ETF fee: €100
- FX fee: €0
- Transaction costs (fixed): €150
Estimate methodology
This is an estimate. Annual % fee = broker/platform + fund/ETF + FX. Today's annual fee estimate = portfolio value × annual % fee + annual transaction costs. Projections use yearly compounding with contributions. The with-fee projection uses net annual return (gross return − annual % fee) and subtracts fixed annual transaction costs each year.
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Fee estimates are approximate and based on publicly available pricing. Actual fees may vary based on your account type, trading volume, and specific products. Always check your broker's current fee schedule.
What hidden investment fees really cost
Hidden investment fees are the costs that quietly reduce your portfolio returns without always being obvious in a broker dashboard. Most investors notice the headline commission, but far fewer account for custody fees, ETF expense ratios, FX conversion charges, spread-related trading costs, and recurring platform fees. On their own, each fee can look small. Over years of compounding, they can take a meaningful chunk out of your long-term wealth.
That is why a broker fee calculator matters. The true cost of investing is not just what you pay today — it is also the future growth you give up because those fees are no longer compounding in your portfolio. A 0.25% FX fee here, a 0.20% fund fee there, and a few recurring transaction costs can add up to thousands or even tens of thousands over a long investment horizon.
This hidden investment fees calculator is designed to make that impact visible. You enter your portfolio value, expected return, investment horizon, and broker. The calculator then applies broker-specific fee assumptions alongside typical fund costs to estimate your annual fees, projected return after fees, and the long-term drag on portfolio growth. The goal is not to produce a perfect tax-lot-level fee statement, but to give you a realistic estimate of what your current setup may be costing you.
If you want the most accurate picture, the next step is connecting your broker. That lets TrackYourPortfol.io move beyond generic assumptions and show your real fees and portfolio performance across accounts in one place.