Investment bankers help companies and governments raise money and buy or sell other companies

Investment banking is not about managing your retirement account. It is about arranging large financial transactions—usually in the hundreds of millions or billions of dollars. An investment bank sits in the middle of these deals: it advises a company on whether to buy another company, structures the transaction, finds the money to pay for it, and takes a fee when the deal closes.

The work breaks into a few distinct tracks. Some investment bankers advise on mergers and acquisitions—helping one company buy another, or helping a company sell itself. Others work in capital markets, which means they help companies and governments raise money by issuing stocks or bonds to investors. A third group, called trading, buys and sells securities on behalf of the bank's own money or its clients. Each track has different daily work, different hours, and different pay.

The reason investment banking exists is that these transactions are too large and too complex for a company to do alone. A mid-sized manufacturer does not know how to find a buyer for itself, or how to structure a deal so both sides pay the right price. An investment bank has the relationships, the informed, and the capital to make that happen. That service costs money—usually a percentage of the deal value—and that is how investment banks make their revenue.

Key Takeaways

  • Investment bankers arrange large financial transactions between companies and governments, taking a percentage fee when deals close.
  • The main divisions are mergers and acquisitions (buying and selling companies), capital markets (raising money through stocks and bonds), and trading (buying and selling securities).
  • Entry-level positions are analyst and associate roles, which involve financial modeling, due diligence, and pitch preparation rather than client meetings.
  • Hours are long and unpredictable in most roles, especially during active deal work, and compensation is heavily weighted toward bonuses tied to deal closings.

Mergers and acquisitions: advising on buying and selling companies

The M&A team is usually what people mean when they say "investment banking." These bankers work with a company that wants to buy another company, or with a company that wants to be bought. They advise on price, structure, and timing. They identify potential buyers or sellers. They write the pitch materials that convince a board to move forward. They negotiate terms and manage the legal and financial due diligence—the process of verifying that the company being bought is actually worth what the seller claims.

A typical M&A deal takes three to nine months from first conversation to closing. During that time, an analyst or junior associate on the team will build financial models showing what the combined company will look like after the deal, prepare presentations for the client's board, and organize the data room—a find online space where the buyer's lawyers and accountants review the seller's financial records. The senior bankers (called managing directors or partners) meet with the client's CEO and board, negotiate with the other side, and manage the relationship.

M&A bankers are paid a percentage of the deal value—usually 0.5 to 1 percent for a large transaction. A $500 million acquisition might generate $2.5 to $5 million in fees for the bank. That fee is split among the team, with the senior bankers taking the largest share. The junior staff see a small portion of the fee, but most of their pay comes as a base salary plus a year-end bonus tied to how many deals closed and how much revenue they generated.

Capital markets: helping companies and governments raise money

Capital markets bankers help companies and governments issue new stocks or bonds to raise money. When a company decides it needs $200 million to expand, it can borrow it (by issuing bonds) or sell ownership stakes (by issuing stock). A capital markets banker advises on which option makes sense, structures the offering, and then sells it to investors—pension funds, insurance companies, mutual funds, and other large buyers.

The process is faster than M&A. A bond offering might take four to eight weeks from decision to money in the bank. The banker's team prepares a prospectus—a legal document that describes the company and the risks of investing in it—and a roadshow, where the company's executives travel to meet large investors and pitch the offering. The banker's sales team then calls those investors and takes their orders. The banker commits to buying any shares or bonds that investors do not want, which is why this is called underwriting—the bank underwrites the risk that the offering will not sell.

Capital markets fees are usually smaller than M&A fees, typically 2 to 5 percent of the money raised. A $200 million bond offering might generate $4 to $10 million in fees. But capital markets teams can do more deals per year because each one moves faster, so the total revenue can be comparable.

Trading: buying and selling securities with the bank's own money

Trading is different from advisory work. Traders buy and sell stocks, bonds, and other securities—sometimes on behalf of clients, but often using the bank's own money in hopes of making a profit. A trader might buy a bond at 98 cents on the dollar and sell it at 99 cents, pocketing the spread. Or a trader might bet that a stock price will fall and short it—borrowing shares, selling them, and buying them back cheaper.

Trading is faster-paced and more quantitative than advisory work. A trader makes dozens of decisions per day, each one involving real money. The work is stressful and the hours are long during market hours, but traders often leave earlier than advisory bankers because the market closes at 4 p.m. Eastern time. Compensation is heavily weighted toward bonuses tied to trading profits—a successful trader might earn a base salary of $150,000 to $300,000 plus a bonus of $500,000 to several million dollars, depending on how much money they made for the bank.

Entry-level roles: analyst and associate positions

Most people enter investment banking as an analyst or associate. Analysts are usually hired straight out of undergraduate college and work for two to three years before leaving for business school or another job. Associates are hired after business school and typically stay for three to five years before moving to a more senior role or leaving the industry.

Analysts spend most of their time building financial models in Excel—spreadsheets that project a company's future cash flows and calculate what it might be worth. They also prepare pitch books (presentations that explain why a client should hire the bank), organize data rooms, and coordinate with lawyers and accountants. They rarely meet clients in the first year. Associates do more client-facing work and more strategic thinking, but still spend significant time on modeling and document preparation.

The hours are long and unpredictable. During active deal work, analysts and associates regularly work until midnight or later, and weekend work is common. During slow periods, the hours are more reasonable. Most banks have formal policies limiting analyst hours to 80 per week, but enforcement varies. Compensation for analysts is typically $80,000 to $120,000 base salary plus a bonus of $20,000 to $100,000 depending on the bank and the year. Associates earn $150,000 to $250,000 base plus bonuses of $100,000 to $500,000 or more.

How investment banks make money and compete

Investment banks generate revenue from three sources: advisory fees (from M&A and capital markets work), underwriting fees (from capital markets offerings), and trading profits. The largest banks—JPMorgan Chase, Goldman Sachs, Morgan Stanley, Bank of America, and Citigroup—dominate because they have the largest client relationships, the most capital to commit to deals, and the biggest sales forces to distribute securities to investors.

Smaller investment banks and boutique firms compete by specializing. Some focus only on M&A, others on specific industries like healthcare or technology. A boutique bank might not have the capital to underwrite a large bond offering, but it can advise on a complex acquisition and charge a high percentage fee because it has deep informed in that industry or transaction type.

The investment banking industry is cyclical. During economic booms, companies buy and sell each other frequently, and capital markets are active. During recessions, deal activity drops sharply, and banks lay off staff. A banker's job security and bonus depend heavily on the overall economy and the bank's deal flow in that year.

Frequently Asked Questions

Do investment bankers actually work 100-hour weeks?

During active deal work, yes—especially for analysts. A deal closing in two weeks might require 80 to 100 hours of work in that week alone. But this is not constant. Slow periods exist, and hours vary by bank and by team. Trading roles often have more predictable hours because the market closes at 4 p.m. Advisory roles are more unpredictable.

What is the difference between an investment bank and a commercial bank?

A commercial bank takes deposits from customers and makes loans. An investment bank does not take deposits—it advises on large transactions and trades securities. Some large banks like JPMorgan Chase do both, but the divisions operate separately and have different cultures and compensation structures.

How much do investment bankers actually make?

Compensation varies widely by level, bank, and role. An analyst might earn $100,000 to $150,000 total (base plus bonus). An associate might earn $250,000 to $500,000. A managing director at a top bank might earn $1 million to $10 million or more in a good year. Bonuses are tied to deal closings and profits, so compensation swings significantly year to year.

Do you need an MBA to work in investment banking?

No for analyst roles—most are hired straight from undergraduate college. An MBA is common for associate roles and is nearly required to move into senior positions. Many analysts work for two years, then attend business school, then return to investment banking as an associate.

What skills do investment bankers need?

Excel modeling, financial analysis, and presentation skills are essential. You also need to understand accounting and corporate finance. Communication matters—you need to explain complex deals clearly to clients and to your team. Attention to detail is critical because a single error in a financial model can lead to a bad decision on a multi-billion-dollar deal.