What Payment for Order Flow Is

Payment for order flow (PFOF) is money a stock broker receives from a market maker or trading firm when the broker sends them a customer's buy or sell order. The broker does not charge you a commission on the trade—that fee comes from the firm that actually executes your order on the other side of it. You pay nothing extra; the broker gets paid by the execution firm instead of by you.

When you place a trade through a retail broker like Fidelity, E*TRADE, or Robinhood, your order does not automatically go to a stock exchange. Instead, the broker routes it to a market maker—a firm that stands ready to buy or sell securities at any moment. That market maker pays the broker for the right to fill your order, because executing millions of retail trades is profitable for them. The market maker makes money on the difference between the bid price (what they pay to buy) and the ask price (what they charge to sell).

Key Takeaways

  • Payment for order flow means a market maker pays your broker when your trade is routed to them, rather than your broker charging you a commission.
  • Market makers profit from the spread—the gap between buy and sell prices—so they pay brokers to receive retail orders that generate that spread.
  • You do not see PFOF as a line item on your statement, but it affects the price you receive because the market maker's profit margin is built into the bid-ask spread.
  • The SEC requires brokers to disclose PFOF arrangements and show you the best available price, but the actual price impact varies by stock and market conditions.
  • PFOF is legal and common, but some brokers avoid it and route orders to exchanges instead, which may result in different execution prices.

How the Money Flows in a PFOF Trade

You place an order to buy 100 shares of a stock. Your broker receives that order and decides where to send it. Instead of sending it to the New York Stock Exchange or NASDAQ, the broker routes it to a market maker—say, Citadel Securities or Virtu Financial. That market maker fills your order immediately at a price, and then pays your broker a small amount per share (typically a fraction of a cent) for the opportunity to do so.

The market maker makes money because they buy the shares from someone else (or from their own inventory) at a slightly lower price than they sold them to you. That difference is the bid-ask spread. If the market maker buys at $50.00 and sells to you at $50.01, they keep the $0.01 per share. They also pay your broker $0.001 per share (or some negotiated rate) out of that spread. The market maker still profits, your broker gets paid without charging you, and you get your order filled instantly.

The catch is that you may not get the absolute best price available at that exact moment. If a better price existed on an exchange, you would not see it because your order never reached the exchange—it went to the market maker instead. The SEC requires brokers to show you the "best execution," but that rule has limits and does not may provide you the single best price in every case.

Why Brokers Use Payment for Order Flow

Brokers use PFOF because it lets them offer commission-free trading without losing money. Before PFOF became standard, brokers charged customers per trade—$5 to $10 per order was common. When brokers began competing on price and dropped commissions to zero, they needed another revenue source. PFOF filled that gap.

For the broker, PFOF is predictable income. Every trade generates a small payment, and the volume of retail trades is enormous. A broker with millions of customers executing thousands of trades per day receives millions of dollars in PFOF payments. That money covers the broker's operating costs, technology, customer service, and marketing.

Market makers pay for order flow because retail trades are profitable and predictable. Retail traders tend to trade smaller sizes, hold positions longer, and follow patterns that market makers can hedge against. A market maker that receives a steady stream of retail buy orders can sell shares from inventory or short-sell, knowing that retail traders are unlikely to move the market sharply. The spread they capture on millions of small orders adds up quickly.

What PFOF Means for Your Execution Price

The price you receive on a PFOF trade is not necessarily worse than the price you would get on an exchange, but it is not necessarily the best available either. The SEC's "best execution" rule requires brokers to seek the most favorable terms for you overall—considering price, speed, size, and likelihood of execution. A market maker might offer you a price that is one cent worse than the exchange price, but fill your order instantly, which counts as better execution in the SEC's view.

The impact varies by stock. On highly liquid stocks like Apple or Microsoft, the bid-ask spread is already tiny (often one cent or less), so PFOF has little effect on your price. On less liquid stocks or during volatile markets, the spread widens, and the difference between the market maker's price and the exchange price can be larger. You might pay an extra penny or two per share without realizing it.

You will not see PFOF as a separate charge on your account statement. The cost is embedded in the price you receive. If you buy 100 shares at $50.01 instead of $50.00, you have paid an extra $1 total, but your statement will show only the purchase price, not the reason for it.

Disclosure and Regulatory Requirements

The SEC requires brokers to disclose PFOF arrangements to customers. Most brokers include this information in their account agreements or on a dedicated page on their website. The disclosure typically states which market makers they route orders to and how much they receive per share or per order. However, the disclosure is often buried in fine print, and many customers never read it.

Brokers must also send you a quarterly report showing the venues where your orders were routed and the quality of execution you received compared to other venues. This report, called a "Rule 10b-5-1 disclosure" or similar, is meant to show whether your broker is truly seeking best execution. In practice, these reports are dense and difficult to interpret, and few retail traders review them.

The SEC has debated whether PFOF should be banned entirely, but as of now it remains legal. Some regulators argue that PFOF creates a conflict of interest—the broker profits when your order goes to a specific market maker, which may not be the best place for your order. Others argue that PFOF enables commission-free trading, which benefits retail investors overall.

Brokers That Avoid Payment for Order Flow

Some brokers do not use PFOF and instead route all orders to exchanges or use a different revenue model. Interactive Brokers, for example, does not accept PFOF and instead charges a small commission on trades or subscription fees for premium services. Fidelity routes a portion of orders to its own exchange (Fidelity ATS) rather than selling order flow to market makers, though it still accepts PFOF on some orders.

If you want to avoid PFOF entirely, you can use a broker that explicitly states it does not accept payment for order flow. The trade-off is usually a small commission per trade or a monthly subscription fee. For very active traders, this may be cheaper than the hidden cost of PFOF. For casual investors who trade infrequently, the difference is usually negligible.

You can also request that your broker route your order to a specific exchange instead of to a market maker. Most brokers allow this through an order type called "direct routing" or by selecting a specific venue. However, this option is often buried in advanced settings and is not available on all platforms.

PFOF and Market Quality

PFOF has changed how retail trading works, and the effects on overall market quality are debated. On one hand, PFOF has made trading cheaper and faster for retail investors. Commission-free trading and instant execution are direct results of PFOF revenue. On the other hand, PFOF creates an incentive for brokers to route orders to the highest-paying market maker rather than the one offering the best price, which could harm execution quality.

Studies on PFOF's impact show mixed results. Some research suggests that retail traders receive prices that are slightly worse than they would on exchanges, but the difference is usually small—a fraction of a cent per share. Other research argues that the speed and certainty of execution through market makers outweigh the small price difference. The debate continues among regulators, academics, and market participants.

Frequently Asked Questions

Do I pay extra because of payment for order flow?

You do not pay an explicit fee, but the cost is embedded in the price you receive. If a market maker's spread is wider than the exchange spread, you may pay slightly more per share. On highly liquid stocks, this difference is often negligible. On less liquid stocks, it can be a few cents per share.

Can I see how much my broker receives from payment for order flow?

Your broker must disclose PFOF arrangements, usually in account agreements or on their website. Many brokers publish quarterly reports showing order routing and execution quality. However, the exact amount per share is often not disclosed to individual customers—only to regulators.

Is payment for order flow the same as a kickback?

PFOF is legal and regulated, while a kickback typically implies an undisclosed or improper payment. PFOF must be disclosed to customers and is monitored by the SEC. However, some critics argue that PFOF functions like a kickback because it creates an incentive for brokers to prioritize payment over execution quality.

What happens if I use a broker that does not accept payment for order flow?

Brokers that reject PFOF typically charge commissions per trade or subscription fees instead. For low-volume traders, these fees may be higher than the hidden cost of PFOF. For active traders, avoiding PFOF can save money overall.

Does payment for order flow affect options trades?

Yes, PFOF applies to options orders as well. Market makers pay brokers for options order flow, and the same execution quality concerns apply. Options spreads are typically wider than stock spreads, so the impact of PFOF may be more noticeable.