Investment banking is the business of helping companies and governments raise money and manage major financial deals

Investment banks sit between organizations that need capital and the investors or lenders who have it. They don't lend their own money the way a commercial bank does. Instead, they advise on deals, structure the transaction, find buyers or lenders, and take a fee when the deal closes. The work spans mergers, stock offerings, bond sales, and restructurings—anything that moves large sums between institutions.

The core difference from retail banking: investment banks work with institutions and large corporations, not individuals with savings accounts. A commercial bank takes your deposit and lends it out. An investment bank arranges for a company to sell shares to thousands of investors, or helps two companies combine, or structures a loan from institutional lenders. The money moves in much larger quantities, the timelines are longer, and the stakes are higher.

Key Takeaways

  • Investment banks earn fees by arranging deals—mergers, stock offerings, bond sales—not by lending their own money.
  • The main divisions are corporate finance (advising on deals), sales and trading (buying and selling securities), and research (analyzing companies and markets).
  • Entry-level roles like analyst and associate require different skills: analysts do financial modeling and due diligence, associates manage client relationships and deal flow.
  • Compensation is heavily weighted toward bonuses, which vary with deal volume and market conditions, not just salary.
  • The work is project-based and cyclical—busy periods cluster around market upswings and M&A waves, with slower stretches in between.

How investment banks make money

An investment bank charges a percentage of the deal value as its fee. When a company goes public through an initial public offering (IPO), the bank might take 3 to 7 percent of the money raised. On a merger, the fee is often 0.5 to 1 percent of the deal size. On a bond sale, it's typically 1 to 2 percent. These percentages sound small until you explore them to real numbers: a $1 billion merger generates $5 to $10 million in fees.

The bank also earns money from trading—buying and selling securities on its own account or on behalf of clients—and from advisory work that doesn't result in a transaction. Some investment banks also manage money for wealthy clients and institutions, earning a percentage of assets under management. The mix varies by firm. Goldman Sachs and Morgan Stanley earn significant revenue from trading and asset management. Lazard and Evercore, which are smaller and more specialized, rely more heavily on advisory fees.

The main divisions and what they do

Corporate Finance is the deal-making arm. Teams here advise companies on mergers, acquisitions, and how to raise capital. They build financial models to show what a deal is worth, identify potential buyers or sellers, negotiate terms, and shepherd the transaction to close. If a manufacturing company wants to buy a competitor, or a private equity firm wants to take a company private, corporate finance is the group that structures the deal and finds the other side.

Sales and Trading buys and sells stocks, bonds, and other securities. Traders work on the desk, executing trades and managing risk. Sales people sit between the traders and the clients—they know what the bank's traders can do and what institutional clients (pension funds, hedge funds, insurance companies) want to buy or sell. They earn money on the spread between the bid and ask price, and on volume. This division is highly dependent on market conditions: when volatility is high and volumes are heavy, it's profitable. When markets are calm, revenue drops.

Research publishes analysis of companies and markets. Analysts cover specific sectors or companies, issue reports with buy, hold, or sell recommendations, and speak to institutional investors. The research team doesn't directly make money—instead, it supports the sales and trading division by giving clients reasons to trade, and it supports corporate finance by providing credibility and market intelligence. Research is also heavily regulated: recommendations must be based on genuine analysis, not on whether the bank is doing a deal with the company.

Entry-level roles: analyst versus associate

An analyst is typically hired straight out of undergraduate college and works in corporate finance or research. The job is highly technical: building financial models in Excel, analyzing company financials, running scenarios, and preparing pitch books (the documents used to pitch a deal to a client). Analysts work long hours during deal periods—80 to 100 hours per week is common when a transaction is active. The role is a training ground: you learn how deals work, how to model cash flows, and how to present to senior bankers and clients. Most analysts stay for two to three years, then move to business school or to a different finance role.

An associate is usually hired after business school or after working elsewhere in finance. Associates manage more of the client relationship and deal flow. They run smaller deals or portions of larger ones, supervise analysts, and begin to develop their own client relationships. The hours are still long during deal periods, but the work is more strategic and less purely technical. Associates are on a path toward vice president and managing director roles, where they originate deals and manage teams.

How compensation works

Investment banking compensation is split between base salary and bonus. An analyst might earn $85,000 to $100,000 in base salary, with a bonus that ranges from $50,000 to $200,000 or more, depending on the bank, the year, and deal volume. An associate might earn $150,000 to $200,000 in base, with a bonus of $100,000 to $500,000 or higher. The bonus is the variable part—it swings with the business cycle and the individual's performance.

Compensation is also heavily dependent on seniority and the division. A trader at a major bank can earn significantly more than a corporate finance analyst at the same level, because trading revenue is more directly tied to individual performance. A managing director who brings in clients and closes deals earns far more than a vice president. The total compensation for a senior banker at a major firm can reach millions of dollars in a good year, but it can also drop sharply in a down year.

The work rhythm and deal cycles

Investment banking is not a steady-state job. Work comes in waves. When the stock market is rising and interest rates are low, companies are more likely to go public or raise debt, and mergers are more common. During these periods, deal teams work intensely. When markets are volatile or falling, deal activity slows, and teams have more downtime. This creates a boom-and-bust rhythm that is hard to predict.

Within a deal, the timeline is compressed. Once a company decides to sell itself or go public, the process might take three to six months. During that time, the investment banking team is in constant motion: meetings with the client, due diligence calls with potential buyers, drafting documents, negotiating terms. Nights and weekends are common. Once the deal closes, the team moves to the next one. There is little continuity between projects, which is why analysts and associates often describe the job as intense but temporary.

Why people choose investment banking

The primary draw is money. Investment banking offers higher compensation than most entry-level finance roles, and the path to senior positions with seven-figure incomes is clear. The second draw is learning: you see how major companies operate, how deals are structured, and how capital markets work. You work with senior bankers and clients, and you build a network that can lead to other opportunities.

The downside is the hours and the stress. Analysts regularly work 80 to 100 hours per week during deal periods. The work is high-stakes—mistakes can cost millions. The job is also cyclical, so job security depends on deal flow. During a market downturn, banks lay off analysts and associates. The role is also a stepping stone: most people don't stay in investment banking for 30 years. They use it as a credential and a network-building opportunity, then move to private equity, hedge funds, corporate finance roles, or business school.

Frequently Asked Questions

Do investment bankers actually work 100 hours a week all the time?

No. The 80 to 100 hour weeks happen during active deal periods, which might be half the year or less. During slower periods, the hours drop to 50 to 60 per week. The unpredictability is part of the challenge—you can't plan your personal life around a fixed schedule.

What skills do you need to get hired as an analyst?

Strong Excel and financial modeling skills, the ability to learn quickly, attention to detail, and comfort with long hours. Most banks hire analysts from target schools (Ivy League, Stanford, Michigan, etc.), though some hire from other schools. Internships during college are nearly essential—they show you can do the work and help you get a full-time offer.

Is investment banking the only way to work in finance?

No. Commercial banking, asset management, private equity, hedge funds, corporate finance departments, and insurance all hire finance professionals. Investment banking is one path, and it's known for high pay and intensity. Other paths offer different trade-offs: less money but better hours, or more specialization in a particular sector.

What happens to investment bankers when the market crashes?

Deal volume drops sharply, so banks have fewer projects and less revenue. Many banks lay off analysts and associates. Those who keep their jobs work on fewer deals and earn smaller bonuses. Senior bankers with strong client relationships are more insulated, but even they see compensation drop. This is why the job is considered cyclical and risky.