Do brokers still charge trading commissions?

Many online brokers now offer commission-free trading on stocks and ETFs, though commissions may still apply to other products such as options contracts, mutual funds, or certain international securities.

What is a bid-ask spread?

The bid-ask spread is the difference between the price buyers are willing to pay and the price sellers are asking. It is an implicit trading cost that exists even when a broker charges no explicit commission.

What is an inactivity fee?

An inactivity fee is a charge some brokers apply to accounts that go a certain period without trading activity or that fall below a minimum balance. Not all brokers charge this, so it is worth checking the fee schedule.

What other hidden fees should I watch for?

Common examples include wire transfer fees, account transfer-out (ACAT) fees, paper statement fees, and fees for broker-assisted trades placed by phone rather than online.

How do zero-commission brokers make money?

Common revenue sources include payment for order flow from market makers, interest earned on customers’ uninvested cash balances, margin lending interest, and premium subscription features.

What is payment for order flow?

Payment for order flow is compensation a broker receives from a market maker or trading venue for routing customer orders to them for execution. It is a legal, disclosed practice, though it has drawn scrutiny over execution quality.

Are fees the only thing that matters when choosing a broker?

No. Execution quality, platform reliability, research tools, and customer support all affect the real value you get, so fees should be weighed alongside these factors rather than in isolation.

Do mutual funds and ETFs have their own fees beyond broker commissions?

Yes. Funds carry their own expense ratios charged by the fund manager, which are separate from any broker trading commission and apply regardless of which broker you use.

How can I compare the true cost across brokers?

Review each broker’s full fee schedule, not just headline commission rates, including account fees, margin rates, and any charges relevant to how you plan to trade and hold investments.

Does margin trading have separate costs?

Yes. If you borrow against your account to trade on margin, the broker charges interest on the borrowed amount, and rates vary meaningfully between firms.

Understanding Broker Fees and Commissions | Imperialpedia

Trading may look free at first glance, but broker fees and commissions rarely disappear entirely — they simply shift form. Understanding where costs actually hide helps you compare brokers on a true, apples-to-apples basis rather than relying on a single advertised number.

The Shift Away from Trading Commissions

Many online brokers now advertise commission-free trading on stocks and exchange-traded funds. This has made trading dramatically cheaper for everyday investors compared to earlier decades. However, commissions can still apply to other products, such as options contracts, certain mutual funds, or broker-assisted trades placed by phone.

Spreads: The Cost You Don't See

Even with zero stated commission, every trade involves a bid-ask spread — the gap between what buyers are willing to pay and what sellers are asking. This spread is an implicit cost baked into the execution price itself, and it can vary depending on the broker's order routing practices and the liquidity of what you're trading.

Hidden Fees to Watch For

Beyond commissions and spreads, several less obvious fees can apply:

Inactivity fees — charged on dormant accounts at some brokers.
Withdrawal or wire transfer fees — for moving money out of the account.
Account transfer-out (ACAT) fees — charged when moving your holdings to another broker.
Broker-assisted trade fees — for placing trades by phone instead of online.
Paper statement fees — for investors who opt out of electronic delivery.

Reviewing a broker's full fee schedule before opening an account avoids unpleasant surprises later.

How "Zero Commission" Brokers Actually Make Money

If trading itself is free, the broker still needs revenue elsewhere. Common sources include:

Payment for order flow — compensation from market makers for routing customer orders to them.
Interest on cash balances — brokers often earn interest on uninvested customer cash before crediting a smaller rate back to the client.
Margin interest — charged to customers who borrow against their account to trade.
Premium subscriptions — optional paid tiers with advanced tools or data.

None of these practices are inherently improper — they are standard, disclosed parts of how modern brokerage business models work. The key is understanding them so you can evaluate a broker's total cost accurately, not assume "commission-free" means "free."

Comparing Total Cost, Not Just Commission

The most useful comparison looks at your actual trading pattern: how often you trade, whether you use margin, how much cash you typically hold, and whether you need broker-assisted services. Two brokers with identical $0 stock commissions can still differ meaningfully in total cost once these factors are considered. This ties closely into confirming a broker's legitimacy and standards, covered in broker regulation and investor protection.

Common Mistakes

Assuming commission-free means entirely free.
Overlooking margin rates until after borrowing on margin.
Ignoring account transfer fees when planning to eventually switch brokers.
Not checking fund expense ratios, which are separate from broker fees entirely.

Conclusion

Broker costs have become far more competitive, but they haven't disappeared — they've become less visible. By understanding spreads, hidden account fees, and how "free" trading is actually funded, you can evaluate brokers on real total cost rather than a single headline number.