Trading commissions went from double-digit dollars per order to zero, and nobody argues that this was bad. The complications arrived afterward, because a business that stopped charging visibly still has payroll, and the replacements are harder to see than the fee they displaced. Zero is a genuine improvement plus a marketing achievement simultaneously, and holding both thoughts is the point.
What changed, and who forced it
Per-order charges once ranged from a few dollars on discount platforms to hundreds for full-service brokerage work, with the expensive end buying advice, tax help and a named human. Then competition collapsed the visible number in stages. An app launched in 2015 built entirely around free stock trades, drawing millions of first-time accounts by removing the charge everyone resented most, and other firms held out until a major incumbent zeroed US stock and fund commissions in September 2019, after which the industry-wide figure effectively became zero within months. If youâre comparing brokers today, What Is a Broker and How to Choose One? covers what actually differs when price isnât the variable.
Two revenue sources filled the gap. Some platforms route customer orders to firms that pay for the privilege and profit on the difference between bid and ask, a practice called payment for order flow. Others keep client cash parked and earn interest on it while paying account holders little or nothing. Regulators examined both: an attempt to prohibit payment for order flow was finalized and then struck down by a federal appeals court in 2024, and one prominent platform paid tens of millions across settlements covering repeated outages alongside descriptions of how it was compensated that regulators considered misleading. None of that makes any particular company sinister, and none of it should be inferred from ads either, which is why reading a firmâs own disclosures beats trusting anybodyâs summary including this one.
Thereâs also a newer wrinkle directly relevant if youâre under eighteen: several apps now offer custodial accounts for teenagers, meaning a parent opens and manages it until majority. Read the fee schedule carefully, because these products often carry asset-based charges that would have been laughed at during the commission wars, and the whole benefit of free trading evaporates when something else bills annually against your balance. Opening Your First Brokerage Account walks through custodial mechanics including the financial-aid complication families discover far too late.
Do the arithmetic before believing the slogan
A thousand dollars earning five percent produces fifty dollars. Subtract a twenty-dollar commission and thirty remains, so eliminating that commission raised your realized outcome by two thirds on a single round trip. For small balances this is transformative rather than merely convenient, and anyone dismissing free trading as cosmetic hasnât modeled tiny account sizes.
Then compare against the cost nobody puts on a comparison chart. A fund charging one percent annually costs roughly one seventh of a seven percent gross return forever, compounding silently in the background whether you trade twice a year or twice a decade, which dwarfs any commission ever charged and appears nowhere near the buy button. See The Hidden Costs of Trading: Slippage, Spreads, and Market Impact for spread drag on individual orders, and Index Funds: Set It and Forget It for locating genuinely cheap diversified exposure. Someone who celebrates zero commissions while holding an expensive actively managed product optimized the wrong variable.
What the interface is doing to your decisions
Free access plus push notifications plus instant fills changes behavior, not just cost. Researchers and regulators both raised concerns that app-style design encouraged more frequent trading than customersâ stated intentions implied, and frequent trading invites precisely the errors catalogued in Why âTime in the Marketâ Beats âTiming the Marketâ. Two specific hazards deserve naming rather than vague warnings. Limitations can appear without advance notice during volatility, as happened to certain popular names in early 2021 when purchases were restricted mid-session while sales remained open, an experience arriving without warning to people whose entire position was illiquid-by-decision. And outages have repeatedly blocked customers from exiting during sharp moves, with compensation processes slow and contested afterward.
Position sizing answers both better than any broker choice does. Never place money you might need urgently inside anything that depends on someone elseâs servers staying responsive during chaos, and never assume access rights youâve only read advertised.
Try this today, fifteen minutes
Open whichever app or website youâd realistically use and find two documents: the fee schedule and the disclosure page explaining how the company earns money. Skim both fully once, writing down every charge that applies to you specifically given your age and likely balance.
Then locate the expense ratio of whatever fund youâd buy first and write it next to those numbers. Ranking them by size tells you where to concentrate your attention, and itâs a ranking almost nobody consults before opening an account, which is most of why beginners lose meaningful amounts of money to things they believed were free.
Educational content, not financial advice. Platform terms change; verify current schedules directly. Investing involves risk, including loss of money.