Investment Banking Explained: Meaning, Roles and How It Works

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SUMMARY

This guide explains what investment banking means, how it works and the core services investment banks offer in India. In under 10 minutes you’ll understand how investment banking differs from commercial banking, who typically uses these services and how a deal like an IPO actually gets done.

Investment banking is a specialised area of finance that helps companies, governments and large institutions raise capital and manage complex transactions. An investment bank acts as a financial intermediary, connecting organisations that need funds with investors, whether through an initial public offering (IPO), a bond issue or a merger. Investment banks focus on large-scale financial transactions rather than everyday retail banking services.

In India, investment banking activity is regulated primarily by the Securities and Exchange Board of India (SEBI) under the Merchant Bankers Regulations. Most firms offering investment banking services operate as SEBI-registered merchant bankers. This article outlines what investment banking is, how it differs from commercial banking, the services investment banks provide and who uses them.

QUICK STAT

Indian companies raised close to ₹1.95 lakh crore through 373 IPOs in 2025, one of the most active years on record for the country’s primary market—nearly all of it arranged by SEBI-registered investment banks. (Source: Business Standard / Pantomath Group data, 2025)

Investment Banking Meaning: What Does Investment Banking Do?

Investment banking refers to advisory and capital-raising services provided to organisations rather than to retail customers. Unlike commercial banks, investment banks do not accept deposits or offer savings accounts and personal loans. Their role is to help clients access capital markets—selling equity to the public, issuing debt to institutional investors, structuring financing for projects or negotiating the terms of mergers and acquisitions.

Where commercial banks focus on deposit-taking, retail lending and payment services, investment banks earn fees for arranging and executing transactions: underwriting an IPO, advising on an acquisition, or placing debt with investors. They rarely hold customer deposits and typically do not provide everyday lending to individuals.

Investment Banking vs Commercial Banking at a Glance

Aspect	Investment Banking	Commercial Banking
Primary clients	Companies, governments, institutions	Individuals and businesses
Core function	Raising capital, M&A advisory, underwriting	Deposits, loans, everyday transactions
Revenue source	Advisory and underwriting fees	Interest income, service charges
Regulator in India	SEBI (merchant bankers)	Reserve Bank of India
Typical deal size	Crores to thousands of crores	Varies, usually smaller and retail-scale

How Does Investment Banking Work?

Investment banking transactions typically follow a consistent sequence, whether the deal is an IPO, a bond issue or an acquisition:

Origination – bankers pitch ideas to a company (for example, going public or acquiring a competitor) and win the mandate to run the transaction.
Due diligence and structuring – the bank analyses financials, assesses risks and decides how the deal should be structured.
Regulatory filing – for public offerings this involves preparing and filing the prospectus with SEBI and relevant exchanges for approval.
Marketing – bankers present the opportunity to institutional investors through roadshows or negotiate directly with counterparties in M&A transactions.
Pricing and execution – the final price or deal terms are set and the transaction is executed and closed.
Post-deal support – the bank may assist with share price stabilisation after listing or support integration and execution following a merger.

Major Services Offered by Investment Banks in India

Investment banks in India provide a broad range of services, all focused on helping organisations raise capital or reorganise their finances:

Initial Public Offerings (IPOs) – acting as book-running lead manager, handling SEBI filings, pricing the issue, drafting the prospectus and coordinating underwriters to achieve subscription.
Mergers & Acquisitions (M&A) advisory – valuing companies, negotiating terms, structuring transactions and conducting due diligence for buyers or sellers.
Debt and equity capital markets – arranging bond issues, rights issues, qualified institutional placements (QIPs) and follow-on public offers (FPOs).
Underwriting – committing to buy unsold shares or bonds in an issue and absorbing part of the risk in exchange for a fee.
Corporate restructuring and advisory – guiding companies through debt restructuring, spin-offs or recapitalisation.
Private placements – arranging private equity or debt funding for companies that prefer not to, or are not ready to, go public.
Research and market making – publishing equity research and providing liquidity in listed securities.

DID YOU KNOW?

Under SEBI’s 2025 amendment to the Merchant Bankers Regulations, Category I merchant bankers (full-service investment banks) must hold a minimum net worth of ₹25 crore by January 2027, rising to ₹50 crore by January 2028—a deliberate tightening of who can manage large public issues. (Source: SEBI (Merchant Bankers) Amendment Regulations, 2025)

Types of Investment Banks

Bulge bracket banks – large, full-service global banks that handle the biggest, most complex deals.
Boutique investment banks – smaller firms focused on M&A advisory or specific sectors.
Middle-market banks – serve mid-sized companies that larger banks often overlook.
Domestic merchant banks – India-focused firms registered with SEBI as Category I or II merchant bankers, handling IPOs, QIPs and advisory for Indian companies.

Who Uses Investment Banking Services?

Clients of investment banks are generally organisations, though their transactions affect retail investors and markets:

Companies planning to go public or raise growth capital
Governments and public sector undertakings issuing bonds or divesting stakes
Private equity and venture capital firms structuring buyouts or exits
Large corporations pursuing mergers, acquisitions or restructuring
Institutional investors such as mutual funds and insurance companies participating in large offerings
High-net-worth individuals and family offices seeking bespoke advisory on major transactions

PRO TIP

Before engaging any investment bank or merchant banker, verify their SEBI registration using the intermediary search on the SEBI website to confirm you are dealing with a regulated entity.

Real-World Example: Taking a Company Public

Imagine a mid-sized manufacturing company aiming to raise ₹500 crore to expand capacity. It appoints an investment bank as the book-running lead manager for its IPO. The bank values the company, decides offer size and price band, prepares the draft prospectus for SEBI, lines up underwriters to guarantee subscription and manages roadshows for institutional investors.

In return the bank typically earns a fee in the range of 1–3% of funds raised—around ₹5–15 crore on a ₹500 crore issue. After SEBI approval and subscription, the bank manages allotment and works to ensure the shares list smoothly on the exchange.

WATCH OUT

Not every merchant banker activity falls within SEBI’s investor-protection framework. Services such as M&A advisory, private placements and valuation work may sit outside that regulatory perimeter—read engagement terms carefully before signing.

Glossary: Key Investment Banking Terms

Merchant banker – the SEBI-registered entity authorised to manage public issues, underwriting and corporate advisory in India.
Book-running lead manager (BRLM) – the investment bank appointed to run an IPO, from pricing and prospectus drafting through to listing.
Underwriting – an investment bank’s commitment to buy unsold shares or bonds in an issue in exchange for a fee.
Prospectus (draft red herring prospectus) – the legal document filed with SEBI that discloses a company’s financials, business and offer details ahead of an IPO.
Qualified institutional placement (QIP) – a mechanism for listed companies to raise equity from institutional investors without a full public offer.
Follow-on public offer (FPO) – an additional equity sale by a listed company to raise further capital.
Due diligence – the detailed review of a company’s finances, contracts and operations carried out before structuring a deal.
Roadshow – presentations organised by the investment bank for company management to pitch an issue to institutional investors.

FAQs On Investment Banking

1. What is investment banking in simple terms?

Investment banking helps companies, governments and institutions raise capital and manage large financial transactions such as IPOs, bond issues and mergers, in exchange for advisory or underwriting fees.

2. What is the difference between investment banking and commercial banking?

Commercial banks take deposits and lend to individuals and businesses, earning interest income. Investment banks focus on capital markets transactions and advisory, and they typically earn fees rather than holding customer deposits.

3. Do investment banks in India need a licence?

Yes. Most investment banks operate as merchant bankers and must be registered with SEBI under the Merchant Bankers Regulations, meeting prescribed net worth and eligibility requirements.

4. Can a small business use investment banking services?

Smaller companies can access investment banking services, often via boutique or SME-focused merchant bankers who handle smaller IPOs or private placements better suited to modest budgets.

5. How do investment banks make money?

Investment banks earn fees from underwriting, advisory work, placement services and other transaction-related activities.

6. What is the role of an investment bank in an IPO?

The bank acts as the book-running lead manager: valuing the company, preparing the prospectus, filing with SEBI, coordinating underwriters and running the roadshow to market the issue.

7. Is investment banking regulated by RBI or SEBI?

Investment banking in India is primarily regulated by SEBI under the Merchant Bankers Regulations; the Reserve Bank of India regulates commercial banking activity.

8. I want to invest through an IPO but don’t understand the process—where do I start?

Retail investors apply through a broker or a UPI-linked trading app using the ASBA process, following the prospectus and price band set by the investment bank.