A commission is only one part of the bill
A brokerage account is a place to hold and transact in investments, but its advertised trading price is not a complete cost estimate. The SEC distinguishes transaction fees, which arise when you buy, sell, or move assets, from ongoing fees, which continue while you own an investment or receive a service. Both can reduce the money available to remain invested.
A commission-free offer usually describes particular eligible trades, not everything an account can do. Other investments, order channels, or services may have different charges. Start with your expected activity rather than a headline: what you would hold, how often you would transact, whether you need advice, and how you would eventually withdraw or transfer assets.
Separate transaction and ongoing costs
Transaction charges can include commissions, bond markups or markdowns, and sales loads on certain funds. A markup or markdown is a dealer adjustment to the price of a transaction. A sales load is a fund sales charge. Neither needs to appear as a familiar stock-trading commission to affect your cost.
Ongoing expenses can include an investment advisory fee and the expense ratios of funds held inside an account. A fund expense ratio represents operating expenses charged within the fund; it is not necessarily a separate debit on your brokerage statement. Paying an adviser does not automatically replace those underlying expenses. Ask which costs are included in a quoted fee and which remain additional.
Check the account and exit costs
Review maintenance, inactivity, minimum-balance, wire, transfer, and closing fees. A platform might be inexpensive for routine trades yet charge for a service you need later. Note when a fee applies, whether it can be waived, and whether the waiver requires maintaining a balance or enrolling in something you otherwise would not use.
Make a plain-language worksheet with a line for opening and maintaining the account, your likely transactions, investments held, advice, and leaving the provider. Keep occasional charges separate from recurring expenses. Also distinguish fees from taxes: a transaction can have tax consequences even when the brokerage commission is zero. Avoid assigning a total before you know the applicable products and terms.
Read the documents, then check the statement
Use the provider’s fee schedule for specific charges, Form CRS for a relationship summary where applicable, and Form ADV for investment adviser disclosures. Fund prospectuses explain fund expenses and sales charges. These documents serve different purposes, so a marketing comparison or short summary cannot replace all of them. Ask the provider to point to the relevant wording when a charge is unclear.
After opening an account, compare actual statements and trade confirmations with your expectations. Some expenses are embedded in investment values rather than itemized as account fees. Keep a copy of the terms you reviewed and revisit them when your activity changes. A useful comparison explains the costs of your intended use, not just which provider has the most attractive banner.
Common questions
Does commission-free mean the account is free?
No. Eligible trades may have no commission while fund expenses, advisory charges, account services, and transfer fees still apply. Check the specific fee schedule and investment disclosures.
Where do I find a fund’s ongoing expenses?
Read its prospectus and fee table. The expense ratio is charged within the fund, so looking only for a separate fee on your brokerage statement can miss it.