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 advise on mergers and acquisitions, underwrite stock and bond offerings, trade securities, and structure complex financial transactions. Unlike retail banks that take deposits and make loans to individuals, investment banks work almost entirely with large institutions, corporations, and wealthy clients. The work is project-based: a bank might spend months on a single merger, then move to an initial public offering for a different client.

The core function is matchmaking with informed attached. When a company wants to sell shares to the public for the first time, an investment bank underwrites the offering—meaning it buys the shares from the company at a set price, then sells them to investors at a higher price, keeping the spread as profit. When two companies want to merge, the bank values both sides, advises on structure, and negotiates terms. When a government needs to borrow money, the bank structures the bond offering and sells it to institutional buyers.

Key Takeaways

  • Investment banks make money from fees on deals, spreads on underwriting, and trading profits—not from customer deposits like retail banks do.
  • The main divisions are corporate finance (mergers and capital raising), sales and trading (buying and selling securities), and research (analyzing companies for clients).
  • Entry-level roles like analyst and associate are structured apprenticeships with defined timelines, typically two to three years before promotion or exit.
  • The work is cyclical: deal flow depends on market conditions, interest rates, and economic confidence, so hiring and hours fluctuate sharply year to year.
  • Compensation is heavily weighted toward bonuses tied to deal performance and firm profitability, not base salary alone.

How investment banks make money

Investment banks earn through three main channels: advisory fees, underwriting spreads, and trading profits. Advisory fees are straightforward—a company pays the bank a percentage of the deal value to advise on a merger or acquisition, typically 0.5 to 2 percent depending on size and complexity. Underwriting spreads are the difference between what the bank pays for securities and what it sells them for; on a large stock offering, that spread might be 3 to 7 percent of the total raised.

Trading profits come from buying and selling securities on behalf of clients and for the bank's own account. A trader might buy a bond at 99 cents on the dollar and sell it at 100 cents, or short a stock ahead of bad earnings. This is where volatility creates opportunity—in calm markets, spreads narrow and profits shrink; in volatile ones, the same trades generate much larger gains. The 2008 financial crisis showed the downside: when trading volumes collapsed and spreads evaporated, banks that relied heavily on trading revenue faced severe losses.

The main divisions and what they do

Corporate Finance handles mergers, acquisitions, and capital raising. Analysts and associates build financial models showing what a deal is worth, prepare pitch books to win clients, and manage the due diligence process. A typical project might run six months from initial pitch to closing. The team works closely with lawyers and accountants but the bank's job is to value the target, structure the transaction, and advise on timing and terms.

Sales and Trading buys and sells securities—stocks, bonds, derivatives, currencies—on behalf of institutional clients and the bank itself. Salespeople maintain relationships with hedge funds, pension funds, and asset managers, calling them with trade ideas. Traders execute those trades and manage inventory, trying to buy low and sell high. This division generates the most revenue at most large banks but also carries the most risk; a bad trade can cost millions in a single day.

Research publishes analysis of companies and markets. Equity research analysts cover specific sectors, issuing reports on individual stocks with buy, hold, or sell recommendations. Fixed income research covers bonds and credit markets. The research team's job is to give salespeople and traders information they can use to pitch clients and make trading decisions. Research is also a training ground—many analysts move into corporate finance or trading after a few years.

Entry-level roles and the analyst-to-associate path

Most people enter investment banking as an analyst, typically straight out of undergraduate school. The analyst role is a two-year apprenticeship. You build financial models in Excel, prepare presentations, run numbers on potential deals, and attend client meetings. The hours are long—60 to 80 hours per week is standard, sometimes more during deal season. The work is repetitive by design: you learn by doing the same task dozens of times until you can do it fast and without error.

After two years, analysts face a decision: promote to associate (which requires an MBA from a top program), move to a different bank, or leave finance entirely. Many take the MBA route because it's the expected path and because the two years of banking experience make you a stronger candidate for better MBA programs. Associates work for three to five years, then move into vice president roles or leave for private equity, hedge funds, or corporate finance jobs at operating companies.

The structure is deliberate. Banks use the analyst program to identify talent, train them intensively, and then let most of them leave. It's not a career path for most people—it's a credential and a network. The people who stay and become managing directors are the exception, not the rule.

Deal flow and how market conditions affect hiring

Investment banking is not a steady business. Deal flow—the number and size of transactions in the pipeline—depends on interest rates, stock market performance, credit spreads, and overall economic confidence. In 2021, deal volume hit record highs because interest rates were low, stock prices were rising, and companies were confident. In 2022, deal volume collapsed as the Federal Reserve raised rates and recession fears spread. Hiring follows deal flow with a lag of six to twelve months.

This means banking jobs are cyclical. A bank might hire aggressively in the spring of a strong year, then freeze hiring in the fall when deal flow slows. Analysts hired in a boom year might graduate into a weak market with fewer associate spots available. Conversely, analysts hired in a weak year might graduate into a strong market with many openings. This unpredictability is one reason the job appeals to some people—the upside is real—and why it's risky for others.

Compensation structure and bonus variability

Investment banking compensation has two parts: base salary and bonus. Base salary for an analyst is typically $85,000 to $100,000 depending on the bank and location. The bonus is where the real money is. In a strong year, an analyst might earn a bonus equal to their base salary or more. In a weak year, the bonus might be 20 to 30 percent of base or zero. Managing directors at major banks can earn millions in bonus in good years and face significant cuts in bad ones.

Bonuses are tied to deal performance and firm profitability. If you work on a large merger that closes, you share in the advisory fee. If the bank has a strong year overall, the bonus pool is larger. If the bank loses money or deal flow dries up, bonuses shrink across the board. This is why compensation in banking is so volatile compared to other professional jobs—you're not paid for showing up, you're paid for deals that close and profits the firm generates.

Why people choose investment banking and why they leave

People enter investment banking for the money, the credential, and the network. Two years as an analyst at Goldman Sachs or Morgan Stanley opens doors—to MBA programs, to private equity, to corporate finance roles at Fortune 500 companies. The experience is intense and the learning curve is steep, which appeals to people who want to be tested. The compensation, even as an analyst, is higher than most entry-level professional jobs.

People leave because the hours are unsustainable long-term, the work is repetitive, and the stress is real. Analysts regularly work through weekends and sleep at the office during deal season. The job offers little autonomy—you execute the senior banker's vision, not your own. Many people discover they don't want to spend their twenties building models for other people's deals. Others leave because they want to work on something they believe in, not just maximize deal value for clients.

Frequently Asked Questions

Do I need an MBA to work in investment banking?

No for entry-level analyst roles—most banks hire undergraduates directly. You do need an MBA to promote from analyst to associate at most banks, which is why many analysts pursue an MBA after two years. Some people skip the MBA and move to private equity or corporate finance instead.

What's the difference between investment banking and private equity?

Investment banks advise on deals and take fees; private equity firms buy companies with borrowed money, own them for several years, and sell them for profit. Many investment bankers move to private equity after a few years because the upside is larger—you own a piece of the deal, not just the fee.

Are investment banking hours really that bad?

Yes, especially as an analyst. 60 to 80 hours per week is standard, and during active deal season it can exceed 100. The hours are front-loaded in your career—they improve as you move up because you manage people rather than build models yourself, though senior bankers still work long weeks.

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

Excel proficiency, financial modeling ability, and comfort with numbers are essential. Banks also look for people who can communicate clearly, work under pressure, and handle repetitive tasks without complaint. Most analysts come from finance, economics, or engineering backgrounds, though any quantitative major works.

Can I work in investment banking without going to a target school?

It's harder but possible. Target schools—Ivy League universities and other elite programs—send many graduates to investment banks, so recruiting is concentrated there. Non-target students can break in through networking, internships, or by starting at a smaller bank and moving to a larger one later.