When Robinhood launched in 2013, it changed the brokerage business for good. The pitch was simple: commission-free stock trading for everyone. It worked so well that Charles Schwab, Fidelity, E*TRADE, and TD Ameritrade all had to drop their trading commissions too.
For retail investors, it felt like a revolution. But after more than three decades trading stocks, options, and futures professionally, I keep coming back to one lesson:
Nothing on Wall Street is free.
Robinhood may not charge you a visible commission every time you place a trade. That doesn't make the trade free. In most cases you're paying indirectly, and those hidden costs add up over time.
So is Robinhood really commission-free? On stocks and ETFs, there's no commission line item, and that part is real. But you still pay through the bid-ask spread, through the quality of your execution, through margin interest, and through regulatory fees Robinhood passes along. The cost just never shows up on your statement.
I opened my own Robinhood account exactly two years ago with $1,000. With a laser focus on risk and money management, I've grown it to over $18,000, and I've been documenting the whole thing in my small-account challenge. It is possible to invest and trade with a small amount of money. I'm willing to teach it, if you're willing to learn.
Payment for order flow: the invisible commission
Robinhood's primary revenue source has long been payment for order flow, or PFOF.
Here's how it works. When you place a market order to buy 100 shares of Nvidia, Robinhood doesn't necessarily send your order to the New York Stock Exchange or Nasdaq. It routes the order to a market maker like Citadel Securities or Virtu Financial. Those firms pay Robinhood for the right to execute it.
They make their money capturing tiny fractions of the bid-ask spread while providing liquidity to the market. Robinhood gets paid. The market maker gets paid. The open question is whether you got the best price available.
Robinhood didn't invent this. Plenty of brokers take payment for order flow. But Robinhood built its business model around it, and regulators have questioned whether maximizing PFOF conflicts with getting customers the best execution. In December 2020, the SEC charged Robinhood over misleading customers about its revenue sources and failing to satisfy its duty of best execution. Robinhood paid $65 million to settle and neither admitted nor denied the findings.
The number that sticks with me is this one: the SEC found that inferior execution prices cost customers $34.1 million, even after accounting for everything those customers saved on commission-free trading.
Why price improvement matters more than most investors realize
Say you're buying 500 shares of a stock. The quoted ask is $100.00. Your order fills at $100.01 instead. You just paid an extra penny per share. That doesn't sound like much, until you realize it cost you $5.
If you're an active trader placing hundreds or thousands of trades a year, those pennies compound into hundreds or thousands of dollars. Which is, ironically, a lot like paying commissions. You just never get a line on your statement labeled "commission." The cost is buried inside the execution price.
The spread is often the real cost
New investors obsess over commissions while ignoring the thing that actually takes their money: the bid-ask spread.
Suppose a stock is quoted:
- Bid: $50.00
- Ask: $50.05
That five-cent spread is friction. Buy at the ask and sell at the bid, and you're already down five cents per share before the stock has moved at all. Professional traders spend enormous amounts of time minimizing that cost with smart order routing and limit orders. Retail investors usually don't think about it.
Market orders can be expensive
One of the biggest mistakes newer investors make is relying on market orders for everything.
A market order tells your broker: I'll take whatever price is available.
That's convenient. It's also dangerous in volatile markets. A limit order lets you set the maximum you're willing to pay, or the minimum you'll accept when you sell.
I rarely use market orders unless liquidity is exceptionally deep. Protecting a few pennies on every trade may seem insignificant. Over thousands of trades, it isn't.
How Robinhood actually makes money
Payment for order flow isn't Robinhood's only revenue source. The company also earns from:
- Margin interest
- Robinhood Gold subscriptions
- Securities lending
- Cash sweep programs
- Options trading activity
- Regulatory fee pass-throughs
Options are worth calling out. Options carry much wider spreads than stocks, so execution quality matters even more there than it does on a single share of Apple.
Even Robinhood's own support documentation makes it clear that while stock and ETF trades are commission-free, customers still pay various regulatory and exchange-related fees that Robinhood passes through.
Again...
Free doesn't necessarily mean free.
So should you leave Robinhood?
Not at all. I actually think Robinhood deserves tremendous credit. It democratized investing. It forced an entire industry to lower costs. Its user interface is still one of the best in the business.
The platform introduced millions of Americans to investing who might never have opened a brokerage account otherwise. That's a real accomplishment. But investors should understand how the business model works.
Every brokerage has to make money somehow. Robinhood simply makes it differently than the traditional firms used to.
My final take
As investors, we need to stop asking whether trading is "free." The better question is: what's the total cost of this trade?
That includes:
- Execution quality
- Bid-ask spread
- Slippage
- Market impact
- Opportunity cost
- Taxes
- Regulatory fees
These hidden costs usually matter far more than a $4.95 commission ever did. They're also one of the quieter reasons most traders lose money. The best traders I've known don't focus on what they're paying in commissions. They focus on execution quality and on minimizing friction.
Because over hundreds or thousands of trades, shaving just a few cents off every execution makes a surprisingly large difference in long-term returns.
Wall Street has always found ways to charge for its services. Sometimes the fee is obvious. Sometimes it's hidden inside the price you pay. Either way, someone is always paying.
