How Financial Companies Make Money: The Complete Guide

Financial companies make money in six main ways: they earn a spread between what they pay for money and what they lend it at, charge fees on assets they manage, charge fees for services such as deals and trades, invest float they hold for customers, take a cut of each transaction, and pool risk by collecting premiums before paying claims. Almost every bank, insurer, payment network, asset manager and fintech runs on one or more of these engines. What separates the winners from the failures is less which engine they pick than whether they price the risk behind it and can survive a bad year.

The range of outcomes is wide. JPMorgan Chase earned about $57.0 billion of net income in 2025, the most of any US bank. Two years earlier, Silicon Valley Bank, which had spent forty years building the best franchise in start-up banking, failed in about 36 hours. Both were in the same business. This guide explains how each part of the financial industry earns its money, using US figures and real cases, and why the same engines that produce steady profits also produce sudden collapses. It draws on The Money Equation, which treats these questions at book length.

What makes finance different from other businesses?

Most companies sell a product and learn its cost at about the same time. Financial companies sell promises, and the cost of a promise shows up later. A deposit is a promise to repay on demand. A loan is a borrower's promise to repay over years. An insurance policy is a promise to pay if something goes wrong. A fund share is a promise that the assets are there and honestly counted.

That creates four problems that ordinary firms rarely face, set out in Chapter 1 of the book:

• The promise problem. Customers cannot inspect what they are buying, so they rely on reputation, regulators and other customers' behavior.
• The cost problem. A lender books interest for years before it learns who will default. An insurer collects premiums before claims arrive. Reported profit in a growing financial firm is partly an estimate, and the estimate is most optimistic at the top of a cycle.
• The leverage problem. Customers' money is the raw material. A typical US bank funds itself with roughly ten dollars or more of other people's money for every dollar of its own, so a small fall in asset values can wipe out the owners.
• The rules problem. The state is a partner. Deposit insurance, capital rules, consumer law and the license to operate all change what a financial company can earn.

These four problems explain why finance can look like an easy business in good years. Revenue arrives first; the bill comes later.

What are the six ways financial companies earn money?

The book groups financial revenue into six engines, plus a seventh for data and market access.

The engines subsidize each other, and that is the most useful habit to carry into any financial product. A free checking account is paid for by the deposit spread and by debit interchange. Credit-card cash back is paid for by merchants' fees and by other cardholders' interest. Zero-commission stock trading is paid for by payment for order flow and interest on idle client cash. For any product, ask which engine pays, who could switch it off, and whether it still pays at a different interest rate or in a recession.

How do banks make money?

A bank borrows short and lends long. It takes deposits that customers can withdraw at any time and uses them to make loans and buy securities that pay back over years. The difference between interest earned and interest paid is net interest income, which is 60–80% of revenue for most US banks and 80–90% for many community banks.

The key ratio is the net interest margin (NIM), net interest income divided by earning assets. US banks earned a NIM of about 3.32% in the second quarter of 2026, according to the FDIC. Industry return on assets was about 1.37%. Because banks run with roughly ten times leverage or more, a return of a little over 1% on assets becomes a return in the low teens on equity. The identity is simple: ROE equals ROA times leverage. Our explainer on what net interest margin is and how banks earn it works through the arithmetic.

The rest of a bank's revenue is fees: deposit service charges, card interchange, treasury management for companies, wealth management, mortgage banking and capital markets. JPMorgan reported about $182.4 billion of revenue in 2025, of which about $95.4 billion was net interest income, and a return on tangible common equity of about 20%. Its company profile shows how a "fortress balance sheet" let it buy Bear Stearns, Washington Mutual and First Republic in crises.

The value of a bank sits largely in its deposits. Cheap, sticky deposits, such as payroll accounts and small-business operating accounts, are worth more than the loans they fund. How much of a rate rise a bank passes to depositors is its deposit beta; across the industry it ran roughly 40–55% in 2022–24, as reported. A bank whose depositors do not shop for rates earns more when rates rise. A bank whose depositors can leave in a day is exposed to a run, which is how Silicon Valley Bank failed. For a practical walk-through of reading a bank's numbers, see how to analyze a bank.

How do card issuers and consumer lenders make money?

A credit card is three businesses in one: a payment product, a revolving loan and a rewards program. Customers who pay in full each month (transactors) generate interchange that the issuer largely spends on their rewards. Customers who carry a balance (revolvers) pay interest at average rates in the low twenties percent, and they carry most of the profit and all of the credit risk.

The lender's equation is:

Lender's margin = yield − cost of funds − credit losses − servicing − acquisition cost

Card yields are high, so card lenders run high margins. Capital One reported a NIM of 8.41% in the third quarter of 2026, more than double the banking industry's. Losses are high too: US card charge-offs were 4.11% of balances in the fourth quarter of 2025, and they peaked near 10% in 2009–10. A lender that prices for 4% losses is fine at 4%. It is in trouble if a recession doubles that and it has no capital to absorb the difference. Chapter 10 of the book, on lending and credit, shows how a cohort of card accounts can lose more than a fifth of its balance and still be profitable, and how little extra loss it takes to break even.

Mortgages work differently in the US. A single home loan is usually split among an originator, which earns fees and a gain on sale; Fannie Mae or Freddie Mac, which guarantees it for a fee of roughly 50 basis points a year (FHFA figure, as cited in the book); a servicer, paid about 25 basis points a year; and the investors who own the bonds and bear the rate risk.

How do payment networks like Visa make money?

Payment networks take a small cut of an enormous flow. When a shopper pays $100 with a US rewards credit card, the merchant typically keeps about $97 to $98. In the book's stylized example the merchant pays $2.75, of which about $2.20 goes to the card issuer as interchange, about $0.15 to the network and about $0.40 to the acquirer and processor. The issuer then spends much of its share on the cardholder's rewards.

Visa's share looks tiny, but it applies to about $14.2 trillion of payments volume (fiscal 2025). Visa reported net revenue of about $45.9 billion and GAAP net income of about $23.5 billion in fiscal 2026. It issues no cards, lends no money and carries no credit risk, so an extra transaction costs it almost nothing. Our case study on how Visa makes money explains the four-party model, the fights over interchange and the threat from real-time bank payments.

US merchants paid about $187 billion in card fees on about $11.9 trillion of purchases in 2024 (Nilson, as reported). Because the networks set interchange on behalf of thousands of banks, the price has been fought over in courts and Congress for two decades, and debit interchange at large banks has been capped since 2011 by the Durbin amendment.

How do insurance companies make money?

Insurers run an inverted business: they collect premiums first and learn their costs later. That gives them two sources of profit. The first is underwriting, measured by the combined ratio (claims plus expenses as a share of premiums); below 100% the insurer makes an underwriting profit. The second is investment income on float, the premiums held until claims are paid.

The US property and casualty industry ran a combined ratio of about 92–93 in 2025, an underwriting gain of about $61 billion. Progressive reported a combined ratio of 87.4 on about $83.2 billion of net premiums written in 2025. Berkshire Hathaway's insurance float reached about $176 billion at the end of 2025, and for most of two decades it cost less than nothing to hold, because its insurers made underwriting profits. Our explainer on how insurance companies make money covers float, reserves and the AIG collapse.

How do asset managers and wealth managers make money?

An asset manager's revenue is close to a single line: average assets under management times a fee rate. Costs are largely fixed, so operating margins at listed managers commonly run about 25–45%, and they swing more than revenue when markets fall. Global assets under management were about $147 trillion in 2025, according to BCG.

Fees have fallen for fifty years because indexing works. Vanguard managed about $12 trillion at the end of 2025 with an asset-weighted expense ratio of about 0.06%, against about 0.32% for the fund industry (Morningstar). Each basis point it does not charge is worth about $1.2 billion a year to its investors. Wealth managers, which own the client relationship, typically charge about 1% of assets a year for advice. Schwab, with about $13.33 trillion of client assets in September 2026, also earns much of its income as a bank funded by client cash.

How do fintech companies make money?

Most US consumer fintechs run on the same engines as banks, rented through a partner bank. Chime, the largest US neobank, earned 2025 revenue of about $2.2 billion, mostly from debit interchange, and about $257 a year per active member. Its edge came from a rule: banks with less than $10 billion of assets are exempt from the Durbin cap on debit interchange, so the small partner banks that hold Chime's deposits can earn roughly two to three times the regulated rate (practitioner estimates) and share it.

That arbitrage is fragile. A North Dakota federal court vacated the Durbin rule in August 2025, and the Eighth Circuit affirmed on 26 October 2026, so the gap between large and small banks' interchange may change. Fintechs that bought or won a charter, such as SoFi, earn the deposit spread directly but carry capital and supervision costs. Our comparison of neobanks and traditional banks and our guide to evaluating fintech unit economics go deeper.

The partner-bank model also has a failure mode of its own. When the middleware company Synapse collapsed in 2024, more than 100,000 people lost access to about $219 million because nobody but Synapse knew which dollar belonged to whom. Deposit insurance did not help, because no bank had failed. Our case study on what happened to Synapse tells the story.

Where does the profit settle?

Put the engines side by side and a pattern appears.

Firms that take a small share of a large flow without holding the risk earn the highest margins and valuations. Firms that hold risk on their own balance sheets earn spreads that look generous until the losses arrive. A great deal of financial innovation is an attempt to keep the fee while handing the risk to someone else, and a great deal of financial crisis is the discovery that the risk came back. The book's business models and unit economics study lays out the numbers in detail.

Why do financial companies fail?

Because revenue arrives before cost, financial firms can grow into trouble without noticing. The book argues that a financial company creates durable value only when four things are true at once, and that the factors multiply rather than add, so a zero in any one makes the result zero:

1. Trust. Customers and counterparties must keep trusting it with their money, and that trust must be deserved.
2. Risk priced correctly. The price charged today must cover the losses, funding and capital the risk will use across a whole cycle.
3. Distribution that pays. It must reach customers for less than they are worth after losses.
4. A balance sheet that survives the bad year. Capital, liquidity and stable funding must absorb losses and withdrawals without forced sales.

Interest rates and regulation sit around the equation like weather. They do not decide whether a firm deserves trust, but they decide how long it lasts if it does not.

The famous failures each turned on one factor. Silicon Valley Bank was strong on distribution and priced its credit well, but its balance sheet could not survive rising rates and a run, and trust disappeared in a day. AIG priced credit protection as if losses would never come, and collateral calls exhausted its balance sheet. Lehman Brothers held about $639 billion of assets on gross leverage of about 31 times and funded them overnight in the repo market; when lenders stopped trusting it, the funding left. Our list of the biggest bank failures in US history traces the same patterns from Continental Illinois in 1984 to First Republic in 2023.

How to read any financial company

Four questions, drawn from the book's business-model chapter, work on almost any firm:

• Name the engine that pays. Spread, fees, float, take rate or premiums. Then ask who sets the price: a market, a network, a regulator or a court. Revenue set by someone else can be reset.
• Separate expected from unexpected loss. The price should cover the average loss. Capital should cover the bad year.
• Find the runnable money. Uninsured deposits, overnight repo, collateral calls and redemption rights can all leave at once.
• Check whether growth came from customers or from the cycle. An asset manager whose assets rose with the market, or a lender whose losses have not yet arrived, is less healthy than its income statement says.

Revenue that depends on a rate cycle, an exemption or a customer's mistake is, in the book's phrase, revenue on loan.

The takeaway

Financial companies earn money from six engines: spread, fees on assets, fees for services, float, take rate and risk pooling. The best businesses take a small cut of a large flow without holding the risk; the most dangerous ones hold risk on borrowed money and book the revenue before the cost arrives. Every failure in this guide turned on a single factor of trust, risk pricing, distribution or balance-sheet strength, while interest rates and regulation set how long the weakness could stay hidden. For the full framework and twenty-five chapters of cases, start with Chapter 3, "Following the Money: How Financial Firms Earn", or read the book, The Money Equation.