Payment for Order Flow (PFOF)

What Is Payment for Order Flow (PFOF)?

Payment for order flow, or PFOF, is compensation a broker receives from a trading venue or market maker in return for routing customer orders there for execution. The arrangement is common in retail equity trading because brokers often have choices about where to send a customer order, and some venues pay for the chance to handle that order flow.

The term matters because PFOF can create a conflict of interest. The venue paying the broker may not automatically be the venue that gives the customer the best overall execution result, which is why PFOF sits at the center of so many debates about routing quality and commission-free trading.

Key Takeaways

• PFOF is compensation tied to routing customer orders to a particular venue.
• It is commonly associated with retail stock and options order routing.
• PFOF does not automatically mean the investor got a bad fill, but it creates incentives that brokers must manage carefully.
• Rule 606 order-routing disclosures and trade confirmations are meant to help investors understand these arrangements.
• PFOF is closely tied to debates about best execution, price improvement, and off-exchange retail execution.

How PFOF Works

When a customer sends an order to a broker, the broker often has multiple choices for routing that order. It might send the order to an exchange, to a wholesaler, or to another execution venue. Some venues pay the broker for that order flow. That compensation can be direct cash, rebates, or other economic benefits captured under the broad regulatory definition of payment for order flow.

This is why PFOF is not just a nickname for one specific fee. It is a routing-compensation structure.

Why PFOF Matters Financially

PFOF matters because it can shape the economics of low-commission brokerage models. A broker may advertise zero commissions while still earning revenue from routing. That does not automatically make the model bad for customers, but it means the visible commission is not the only economic fact that matters.

The real question is whether the broker still satisfies its best-execution duty and whether customers are receiving competitive fills, meaningful price improvement, and transparent disclosure about the broker's incentives.

PFOF Versus Best Execution

This distinction matters because a broker can receive PFOF and still claim to satisfy best execution, but the arrangement must be scrutinized carefully because the broker has an incentive that may not perfectly line up with the customer's interest.

Where Investors See PFOF Disclosed

PFOF shows up in two main places. Trade confirmations must disclose whether the broker receives payment for order flow for that type of transaction and tell the investor that more detailed information is available on request. Rule 606 disclosures go further by requiring brokers to describe routing relationships, payments received from venues, and the terms of arrangements that may influence routing decisions.

That means PFOF is not supposed to be invisible. But it is still technical enough that many investors do not realize how central it is to the brokerage business model.

The Bottom Line

Payment for order flow is compensation a broker receives from a trading venue or market maker for routing customer orders there for execution. It matters because it helps explain how some brokers earn money on commission-free trading, while also creating routing conflicts that make best execution and disclosure especially important.