What is commission and how does it really work?

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Commission is one of those money words that pops up everywhere, from real estate and stock trading to online sales and investment advice, yet it often hides a surprising amount of complexity. At its core, commission is a way of paying someone for getting a deal done, but the rules around when it is earned, when it is lost, and how it must be documented can be a lot more nuanced than they seem at first glance.

Understanding what commission is, how it works in different industries, and what the law says about it is essential whether you are an employee, a sales agent, a business owner, or an investor dealing with advisers. Misunderstanding commissions can create conflicts of interest, legal disputes, and even total loss of the right to be paid, especially when an agent is found to have acted against the interests of their principal.

What is commission?

In simple terms, a commission is a payment that depends on the success of a particular transaction or performance. Instead of receiving a fixed salary only, a person such as a broker, salesperson, or financial adviser may earn money as a percentage of the value of a deal they help complete, or as a fixed fee per transaction. This form of compensation is common wherever there is a clear, measurable outcome like the sale of a product, a completed contract, or an executed investment.

The key idea behind commission-based pay is to align the worker’s incentives with the desired result. If a real estate agent only gets paid when the property actually sells, they are strongly motivated to market it effectively. If a broker earns a cut of the trades they execute, they are pushed to bring in business and keep clients active. That link between performance and pay is what makes commission so attractive to many businesses.

Commission can be structured in many different ways: it might be a fixed percentage of sales revenue, a share of profits, a tiered rate that increases once certain targets are hit, or a flat fee per unit sold. In some cases, the commission structure is mixed with a basic salary, while in others the commission is practically the entire compensation package.

Because commission is often tied to agency relationships – situations where one person (the agent) acts on behalf of another (the principal) – it also raises important questions about loyalty, fairness, and disclosure. Courts and regulators have long been concerned with how commissions can both motivate good performance and, if abused, encourage conflicts of interest or unfair dealing.

In everyday language, the word commission is also used more broadly to describe an official group of people given authority to investigate, regulate, or manage something (for example, a government commission). However, in this article, the focus is on commission as a form of financial compensation tied to economic transactions and services.

Legal principles: loyalty, faithless servants and loss of commission

Commission payments do not exist in a legal vacuum; they sit on top of strict duties that agents owe to their principals. In many legal systems, especially those influenced by common law, an agent must act with the highest good faith and loyalty when representing their client or employer. If that duty is broken, the consequences can be severe, including the complete loss of the right to commission.

A classic illustration comes from the famous 19th-century case Murray v. Beard (New York Court of Appeals, 1886). In that decision, the court applied what is often called the “faithless servant” doctrine. The principle is straightforward but powerful: when an agent is disloyal in dealing with their principal, they can be treated as a “faithless servant” and may forfeit any compensation – including commissions – connected to the disloyal conduct.

The court in Murray v. Beard emphasized that an agent must show the utmost good faith (uberrima fides) in their dealings. The judgment essentially held that if an agent acts against the interests of their employer at any stage of a transaction, that conduct is considered such a serious breach that the agent loses any right to be paid for those services. In practical terms, it means that even if the deal closes and money comes in, the agent can still be denied their commission because of their disloyal behavior.

This doctrine protects principals from agents who might secretly seek extra benefits, kickbacks or side deals. For example, if a broker steers a client into a transaction because it gives the broker a hidden advantage rather than because it is good for the client, a court may later decide that the broker must return any commission already received and cannot claim any additional commission. That risk is a strong legal incentive for agents to stay transparent and loyal.

The faithless servant rule also has a broader message about commission-based work: the right to commission is not just about closing deals, but about how those deals are obtained. Even when contracts address percentage rates and payment dates, underlying legal duties like loyalty and honesty can override those agreements if the agent’s behavior crosses the line into disloyalty or fraud.

Modern regulation of commission-based pay: the example of California

In addition to traditional court-made rules, modern legislation has increasingly stepped in to regulate commission arrangements. One important example comes from California, where lawmakers have addressed how employers must document and define commission pay for employees.

In 2011, California Governor Jerry Brown signed AB 1396 into law, amending the California Labor Code. This change directly targeted employers who compensate their staff through commissions. The law requires that when an employee’s pay includes commission, there must be a written contract that clearly explains the key terms: how commissions are earned, how they are calculated, and how and when they will be paid.

This requirement for a written commission agreement, which became effective on January 1, 2013, is designed to bring transparency and reduce disputes. Without a clear written document, employees may not fully understand when they are actually entitled to commission or how deductions and adjustments are applied. Employers, on the other hand, benefit from setting clear expectations that can help avoid litigation over unpaid commissions.

The California law also narrows what counts as a commission. It explicitly excludes short-term productivity bonuses such as those often paid to retail clerks for meeting immediate sales goals. Likewise, typical bonus and profit-sharing plans are not classified as commissions, unless the employer has specifically promised to pay a fixed percentage of sales or profits as compensation for work. When that fixed percentage element is present, the arrangement begins to look much more like traditional commission-based pay.

These distinctions matter because different categories of compensation can be subject to different legal protections and rules. Employees and businesses in California must therefore be careful to correctly label and describe their payment structures. Misclassifying a bonus system as something other than commission – or vice versa – can create compliance headaches and potential liability.

Trail commission in the investment industry

One of the most controversial types of commission in the financial world is the so-called trail commission. This payment model is especially important in the context of investment management and financial advice, where it can quietly influence the products that clients are offered.

Trail commission is an ongoing fee paid by investment management companies to financial advisers. Instead of being a one-time commission at the moment a client invests, trail commission is calculated as a small annual percentage of the client’s invested assets. Typical rates can range from around 0.1% up to roughly 0.9% per year of the portfolio’s value, although exact figures depend on the product and jurisdiction.

When a client invests through a financial adviser who uses trail commission, that adviser will usually keep this recurring payment. The idea is that the adviser continues to receive income as long as the client’s money stays invested in the chosen product or fund. This ongoing compensation is often justified as covering the cost of continued service, portfolio monitoring, and periodic advice.

Supporters of trail commission argue that it can align the adviser’s interests with those of the investor. Since the adviser’s income increases when the portfolio grows and persists over time, the adviser supposedly has a strong reason to look after the investment carefully. Maintaining or improving the client’s balance becomes beneficial to both sides, which in theory should encourage responsible and long-term thinking.

Critics, however, see serious problems with this model. Many investors are not fully aware that part of the fees charged by an investment product are being paid out as trail commission to advisers. This lack of transparency can make it difficult for clients to understand the true cost of advice and to compare different options. Detractors also argue that trail commissions do not necessarily drive better performance and may instead tempt advisers to favor the funds that pay them the highest ongoing commission, rather than the ones that are truly best for their clients.

Because of these conflicts of interest, trail commission has been the target of public warnings and investigative articles. Media outlets in various countries have highlighted the risk that investors might be quietly steered into expensive products that reward advisers more generously, without any clear evidence that these products perform better. Such criticism has played a role in prompting regulators to rethink how advice can be paid for fairly.

Regulatory changes in the UK: banning commission for independent financial advisers

The United Kingdom provides a clear example of how regulators can transform the way commissions work in the financial advice market. For years, concerns about hidden fees, commission-driven recommendations, and weak transparency pushed the authorities to overhaul adviser remuneration.

A major turning point came with the Retail Distribution Review (RDR), which took effect on December 31, 2012. Introduced by the UK’s regulator (now the Financial Conduct Authority, or FCA), the RDR reshaped how independent financial advisers could be paid for managing a client’s wealth. One of the most significant outcomes was the effective end of traditional commission payments in many areas of regulated investment advice.

Under the post-RDR rules, an independent financial adviser in the UK generally cannot accept commission from product providers for managing client assets. Instead, the adviser has to agree on an explicit charging structure directly with the client before advice is given. This might take the form of a flat fee, an hourly rate, or a clearly disclosed percentage of the value of assets under advice that is paid by the client rather than bundled into the product’s internal costs.

The FCA’s aim is to remove or drastically reduce hidden conflicts of interest. When advisers were remunerated via commissions built into products, they could be tempted to recommend options that paid higher commissions rather than those that were most suitable and cost-effective for the client. By forcing adviser charges into the open and making them a matter of direct agreement, the regulator tries to ensure that clients better understand what they are paying and what they are getting in return.

The RDR also had a major impact on trail commission in the UK. From April 6, 2014, trail commission on new investment products became effectively banned. Existing arrangements were given a grace period, but the plan was to phase them out completely by April 6, 2016. This transition meant that advisers could no longer rely on automatic, product-funded trailing fees on newly sold investments.

The reforms have been widely praised within parts of the financial services industry, particularly by those who favor a more transparent and professional advice market. Many observers argue that explicit, client-agreed charging structures are healthier over the long term because they make costs visible and encourage genuine value-based competition among advisers.

At the same time, the shift away from commission has led to changes in the broader, non-advised or direct-to-consumer sector. Some companies that previously took their payment indirectly through commissions on policies and investments have moved toward charging customers straightforward upfront fees for certain financial products. While this can feel more expensive at the moment of purchase, it is usually clearer than having charges buried inside product pricing that clients struggle to decode.

Commission, soft dollars and kickbacks

The debate around commission also connects to related practices such as soft dollars and kickbacks. These mechanisms can further complicate how and why certain products or services are recommended to clients, and regulators often scrutinize them closely.

Soft dollar arrangements usually appear in the investment and brokerage world. Instead of paying cash directly for research or other services, an asset manager may direct trading business to a particular broker and, in return, receive research or other benefits funded by the commissions paid on those trades. While not always illegal, soft dollars can obscure who is really paying for what, raising questions about transparency and fairness to end investors.

Kickbacks, by contrast, are more clearly associated with illegal or unethical commission behavior. A kickback typically involves a secret or improper payment made to an intermediary who has the power to influence a transaction. For instance, a decision-maker might direct business toward a certain provider because they are receiving under-the-table payments, not because that provider offers the best terms for the client or organization.

Because commissions, soft dollars, and kickbacks can easily blur into one another in practice, authorities and industry bodies often insist on strong disclosure and strict conflicts-of-interest policies. Investors are increasingly encouraged to ask advisers exactly how they are paid, whether they receive any additional benefits from product providers, and how those incentives might shape their recommendations.

Press reports and opinion pieces in countries like Britain and Australia have repeatedly highlighted the risks around trail commissions and related incentives. Some commentators have openly called for the abolition of trail commissions and aggressive oversight of any form of remuneration that could cloud an adviser’s judgment. Their argument is that once clients truly see the costs and incentives involved, they can better protect themselves and demand cleaner, more transparent pricing structures.

The evolution of commission-based pay reflects a balance between harnessing its motivational benefits and minimizing the danger that hidden incentives will distort advice, push unsuitable products, or encourage disloyal behavior. Courts, lawmakers, regulators, and the media all play a role in shaping where that balance ultimately lands in each jurisdiction and industry.

For anyone working with or relying on commission-based arrangements today, the big picture is that commissions are powerful but closely policed tools for sharing value; they reward results, can create sharp incentives, and are increasingly governed by detailed contractual, legal and regulatory frameworks designed to keep loyalty, transparency and client interests at the center of the relationship.