Comisiones de los brókers online en 2026, explicadas
Comisiones de compraventa, spreads, cambio de divisa, custodia e inactividad: cada coste explicado con ejemplos reales.
En síntesis
Broker fees rarely look expensive in isolation. The cheapest broker is the one with the lowest total cost for the way you actually invest, not the one with the lowest advertised fee.
Many investors spend hours comparing brokers but focus on the wrong numbers.
A platform advertising 'zero commission' may end up costing more than a broker that charges €1 per trade. The reason is simple: trading commissions are only one part of the total cost of investing.
To compare brokers properly, you need to understand every fee that can affect your returns.
Trading commissions
This is the fee charged when you buy or sell an investment. Examples include €1 per trade, 0.10% of order value, $0.005 per share or €0 commission.
For small investors, fixed fees can have a surprisingly large impact. If you invest €100 per month and pay €2 per trade, you've already lost 2% before your investment has even started working.
This is why many long-term investors prefer brokers that offer free ETF savings plans or low-cost recurring investments.
FX conversion fees
For European investors, FX fees are often more important than trading commissions.
Whenever you buy a US stock using euros, your broker may convert EUR into USD. Examples include a 0.15% FX fee on €10,000 = €15, a 0.50% FX fee on €10,000 = €50, or a 1.00% FX fee on €10,000 = €100.
Over time, FX costs can become one of the largest expenses in an international portfolio.
Always compare FX fees alongside trading commissions.
Spreads
The spread is the difference between the buying price and selling price of an asset. Unlike commissions, spreads are not always displayed as a separate fee.
They are particularly important when trading forex, CFDs, crypto, less liquid stocks or bonds. A broker can advertise commission-free trading while making money through wider spreads.
This is one reason why comparing only headline fees can be misleading.
Pro tip
If you're buying a stock, ETF or other exchange-traded asset, consider using a limit order instead of a market order.
A market order executes immediately at the best available price, which may be worse than expected when spreads are wide or markets are volatile.
A limit order lets you set the maximum price you're willing to pay (or the minimum price you're willing to accept when selling), helping reduce the hidden cost of the spread and giving you more control over execution.
For highly liquid ETFs and large stocks, the difference may be small. For less liquid securities, bonds, small-cap stocks or volatile markets, limit orders can save meaningful money over time.
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Custody and account fees
Some brokers charge a fee simply for holding investments on your behalf. Examples include 0.10% per year, 0.15% per year, €5 per month or no custody fee.
A 0.15% annual custody fee on a €100,000 portfolio costs €150 every year, regardless of whether you trade.
Many modern brokers have removed custody fees entirely, but they're still worth checking before opening an account.
Deposit and withdrawal fees
Most European brokers offer free SEPA bank transfers, but not all funding methods are free. Common charges include card deposit fees, instant deposit fees, international transfer fees and withdrawal fees.
For long-term investors these costs are usually less important than trading or FX fees, but they can still add up if you move money frequently.
Inactivity fees
Some brokers charge a fee if you don't use your account for a long period. This is more common among trading platforms than investment-focused brokers.
For buy-and-hold investors, inactivity fees are particularly frustrating because doing nothing is often the correct investing decision.
Before opening an account, check whether the broker charges inactivity fees and after how long they apply.
The biggest mistake investors make
Most people compare brokers like this: trading commission, trading commission, trading commission. The better approach is to calculate your total annual cost.
Investor A
€0 commission + 0.50% FX
May end up paying significantly more overall when investing regularly in US assets.
Investor B
€1 commission + 0.15% FX
Likely pays less overall despite paying a commission on every trade.
The cheapest broker is not always the broker with the lowest advertised fee.
A simple fee checklist
Before opening an account, compare these nine categories:
Trading commissions
ETF fees
FX conversion costs
Spreads
Custody fees
Deposit fees
Withdrawal fees
Inactivity fees
Minimum deposit requirements
If you understand these nine categories, you'll already know more about broker pricing than most investors.
The bottom line
Broker fees rarely look expensive in isolation. The problem is how they compound over time.
A small difference in FX costs, custody fees or commissions can become hundreds or even thousands of euros over the lifetime of a portfolio.
The best broker is not necessarily the one with the lowest headline fee. It's the one with the lowest total cost for the way you invest.
Compare broker fees
Use InvestBeacon to compare regulated European brokers by trading commissions, FX costs, custody fees, withdrawal fees and account features.
Find out what investing really costs before opening an account.
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Revisado por el equipo editorial de InvestBeacon
Actualizado el 24 June 2026
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