Investment firms make money from several streams at once, and most clients only see one or two of them on a statement. The visible ones are advisory fees charged as a percentage of your account and commissions on trades. The less visible ones include the expense ratios baked into mutual funds and ETFs, the spread between what a market maker pays and receives on your trades, payments the broker collects for routing your orders, interest on margin loans, fees for lending out your shares, and the gap between what your uninvested cash earns and what the firm earns on it. Larger firms layer on investment banking fees, performance fees, and research paid through trading commissions. Each line looks small on its own. Together they explain how the industry works.
Advisory Fees on Assets Under Management
The clearest revenue line is the asset management fee: a set annual percentage of everything the firm manages for you. Most advisory firms charge between 0.50% and 2.00% of assets under management, with the median around 1% to 1.5%. A firm managing $500 million at a 1% average fee earns $5 million a year regardless of market direction, which is why the model is attractive to firms.
Fees are typically billed quarterly, in advance or in arrears, against your account’s market value at the start or end of the billing period.1SEC.gov. Division of Examinations Observations: Investment Advisers’ Fee Calculations Registered investment advisers file Form ADV, a disclosure document listing how they charge, what conflicts of interest exist, and any disciplinary history.2SEC.gov. Form ADV Part 2A Part 2A, sometimes called the brochure, describes the fee schedule, whether fees come out of your account or are billed separately, and whether advisers receive compensation for selling investment products. You can request it before signing any advisory agreement.
Tiered and Wrap Fees
Many firms use tiered pricing, where the percentage drops as your balance grows. A firm might charge 1.25% on the first $500,000, 1.00% on the next $500,000, and 0.75% on anything above $1 million. Like income tax brackets, only the dollars within each tier are charged at that tier’s rate, so a $1.5 million account under that schedule blends to about 1.00%. Ask whether the firm uses blended tiers or a flat rate; the difference compounds over decades.
Wrap fee programs bundle advisory services, trade execution, custody, and reporting into a single annual charge, usually between 1% and 3% of managed assets.3SEC.gov. Observations from Examinations of Investment Advisers Managing Client Accounts That Participate in Wrap Fee Programs The appeal is one line item covering everything. The risk is that infrequent traders overpay for execution they aren’t using. SEC examinations have flagged cases where advisers placed wrap fee clients into mutual funds and ETFs that carried their own internal expenses on top of the wrap charge, layering fees on fees.
Fund Expense Ratios
When a firm manages a mutual fund or ETF instead of an individual account, revenue comes through the fund’s expense ratio, an annual percentage deducted directly from fund assets. You never see a bill. The money comes out of returns before they’re reported. As of 2024, the average expense ratio for actively managed equity mutual funds was about 0.40%, while index equity ETFs averaged roughly 0.14%. Some active funds charge over 1.00%.
The expense ratio bundles several costs. The management fee paid to the portfolio team is the largest piece. On top of that, the fund pays administrative, custodial, legal, and accounting costs. Marketing and distribution costs appear as 12b-1 fees, capped at 1% of fund assets per year.4FINRA. Mutual Funds Those fees pay for advertising, compensation to brokers who sell the fund, and certain shareholder services. Class A shares typically carry about 0.25% in 12b-1 fees; Class B and Class C shares often carry the full 1%.
A fund charging 0.80% annually on $100,000 pulls $800 a year from your returns. That is where a large share of industry revenue lives, and it is invisible on your statement.
Trading Spreads and Payment for Order Flow
Firms that execute trades collect revenue through commissions and through the bid-ask spread. The spread is the gap between the highest price a buyer will pay and the lowest a seller will accept. A stock with a $50.00 bid and a $50.03 ask lets a market maker pocket three cents per share when it fills both sides. Multiplied across millions of shares a day, that adds up. Spreads widen on thinly traded stocks because the market maker takes on more inventory risk, which raises revenue per share.
Brokerage firms must file quarterly reports under SEC Rule 606 disclosing where they route customer orders, what payments they receive from each trading venue, and any arrangements that influence routing.5eCFR. 17 CFR 242.606 – Disclosure of Order Routing Information The reports break down payments by order type and show the net dollar amount received in total and on a per-share basis. They are public and posted on each broker’s website.
When you place a trade through a commission-free brokerage, the firm still earns on that trade. Most zero-commission brokers sell your order to a wholesale market maker, a practice called payment for order flow. The wholesaler pays the broker for the right to fill your order and profits from the spread. As of early 2025, payment for order flow remains legal in the United States and is a significant revenue source for retail brokers.6SEC.gov. How Does Payment for Order Flow Influence Markets
The amounts vary widely. Research from Wharton found the same wholesale firm paid one broker $0.10 per hundred shares and another $0.75 per hundred shares. The higher-paying arrangement came with zero price improvement for customers; the lower-paying one delivered better execution. Some brokers appear to accept larger payments in exchange for worse fills.
Margin Interest and Securities Lending
Brokerage operations generate substantial revenue by lending money and shares. Clients who buy stocks on margin borrow from the broker at rates that vary by loan size. Larger balances get lower rates. At one major brokerage, rates in 2025 ran roughly 4% to 6% depending on account type and balance. Smaller retail platforms often charge toward the higher end, sometimes exceeding 10% on small margin balances. The Federal Reserve’s Regulation T governs how much credit brokers can extend for securities purchases.7eCFR. 12 CFR Part 220 – Credit by Brokers and Dealers (Regulation T)
Margin lending is profitable partly because the collateral already sits in the account. If your account value drops below the maintenance requirement, you get a margin call. Firms are not required to call you before selling your holdings. FINRA rules allow the firm to liquidate assets without prior notice, and the firm can sell more than enough to cover the call.8FINRA. Know What Triggers a Margin Call
Firms also lend shares held in client accounts to short-sellers, who pay a borrowing fee. The fee varies with how hard the stock is to borrow. Widely held, liquid names might carry only a few basis points. Hard-to-borrow stocks with heavy short interest can carry annualized fees of 10%, 30%, or higher. Some brokerages run fully paid lending programs where clients opt in and split the revenue, often 50/50. Shares on loan are not protected by SIPC coverage during the loan period.
Cash Sweep Spreads
One of the least visible revenue lines is the spread on uninvested cash. When cash sits in your brokerage account, the firm sweeps it into a bank deposit program or money market fund. The firm earns interest at prevailing rates and pays you a fraction. With the federal funds rate above 5% in 2023 and 2024, some firms kept most of that interest, paying clients as little as 0.3% to 0.5% while earning several percentage points on the same cash. One estimate put industrywide cash sweep revenue at roughly $15 billion per year.
The math works because firms hold enormous cash pools. A 2% spread on $50 billion in swept deposits produces $1 billion a year with essentially no risk. Firms describe sweep accounts as transitory holding areas rather than savings vehicles. For a client keeping $50,000 in cash at a 0.5% sweep rate while the firm’s own money market fund pays 4.5%, the gap is $2,000 a year. Checking your sweep rate and comparing it to a same-firm money market fund is one of the simplest ways to stop overpaying.
Performance Fees and Carried Interest
Hedge funds and private equity firms add a performance incentive on top of a management fee. The traditional model charges 2% annually plus 20% of profits, but competitive pressure has lowered the averages. Industry data from 2023 showed the average hedge fund management fee closer to 1.35%, with performance fees averaging around 16%. The largest and best-performing funds still command the full 2-and-20 or higher.
The profit share, called carried interest, is where fund managers earn the bulk of their money. A fund with $200 million in gains and a 20% carry sends $40 million to the general partner. High-water marks require the fund’s value to exceed its previous peak before a new performance fee kicks in. Some agreements also set a hurdle rate, often between 6% and 8%, that the fund must clear before carry applies. Carried interest generally flows through as capital gains rather than ordinary income, and Section 1061 requires a holding period of more than three years for the gain to qualify as long-term; shorter holds are recharacterized as short-term and taxed at ordinary rates.9Internal Revenue Service. Section 1061 Reporting Guidance FAQs10Office of the Law Revision Counsel. 26 USC 1061 – Partnership Interests Held in Connection with Performance of Services
Investment Banking Fees
Investment banking divisions earn by helping companies raise capital and execute transactions. The biggest single payday comes from underwriting initial public offerings. The bank buys shares at a discount from the company and resells them to the public at the offering price; the gap is the underwriting spread, typically 4% to 7% of gross proceeds. Mid-sized offerings between $20 million and $100 million cluster heavily at 7%. Larger deals negotiate lower percentages because fixed costs spread across a bigger base. On a $500 million IPO with a 5% spread, the underwriting syndicate splits $25 million.
Merger and acquisition advisory is a separate stream. Firms typically charge a monthly retainer during the engagement plus a success fee calculated as a percentage of the final deal value. Middle-market retainers commonly run $50,000 to $100,000 per month and get credited against the success fee at closing. Success fees often follow a descending scale, with a higher rate on the first several million of deal value and lower rates as size increases. Advisory work also feeds financing work, since the firm handling the deal is positioned to underwrite whatever the buyer borrows.
Soft Dollar Arrangements
Investment managers sometimes pay higher-than-necessary trading commissions in exchange for research services from the broker handling the trades. A manager might route trades through a particular broker not for best execution, but because the broker provides proprietary research, data terminals, or analytical tools bundled with the commission. Section 28(e) of the Securities Exchange Act provides a safe harbor as long as the manager determines in good faith that the commissions are reasonable relative to the value of the research received.11Federal Register. Commission Guidance Regarding Client Commission Practices Under Section 28(e) of the Securities Exchange Act of 1934
Clients bear the cost through higher trading expenses. If a manager could execute at two cents per share but routes to a broker charging four cents because the broker bundles research, the extra two cents comes out of client returns. Managers must disclose these arrangements in Form ADV, and the SEC expects a good-faith analysis showing the research actually assists with investment decisions.2SEC.gov. Form ADV Part 2A When a service has a mixed use, part research and part office overhead, the manager allocates costs and only charges the research portion to client commissions.
What to Check on Your Own Account
No major firm relies on a single revenue line. A full-service firm can collect a 1% advisory fee, earn a spread on your uninvested cash, receive payment for order flow on your self-directed trades, charge margin interest when you borrow, lend your shares to short-sellers, and collect 12b-1 fees from the mutual funds it recommends. Each charge looks modest. Stacked, they can consume a meaningful share of annual returns.
Two documents show you where your firm’s money actually comes from. Form ADV Part 2A lays out how the firm charges, whether fees deduct from your account or bill separately, and where its conflicts sit. The Rule 606 quarterly report shows how your trades are routed and who pays for the privilege. Both are short, both are public, and together they explain more about how the firm makes money than any marketing document.