What is an IPO? Meaning, Step-by-Step Process & Beginner Guide
The complete beginner blueprint to understanding Initial Public Offerings in India. Discover why companies go public, decode the book building process, understand lot size rules, and master SEBI allotment mechanics.
An Initial Public Offering (IPO) is the financial process where a privately held company sells shares of its stock to the public for the first time, transitioning into a publicly traded corporation listed on stock exchanges such as NSE and BSE to raise equity capital from institutional and retail investors.
1. Why Do Companies Launch an IPO?
Transitioning from a privately held entity to a publicly listed corporation is a monumental corporate milestone. Companies execute an IPO for several strategic reasons:
Raising Growth Capital
By issuing fresh shares to public investors, the company generates non-debt capital that can be deployed into building new manufacturing plants, funding research and development (R&D), or expanding into overseas markets without recurring interest obligations.
Deleveraging & Debt Repayment
High interest costs constrain corporate profitability. Companies frequently earmark a substantial portion of fresh issue proceeds to prepay bank borrowings, immediately boosting net margins and return ratios.
Providing Liquidity for Early Investors
Venture capital (VC), private equity (PE), and angel investors who backed the company in its infancy require an exit mechanism to monetize their investments. This is achieved via an Offer for Sale (OFS). Learn more in our Fresh Issue vs OFS Guide.
Brand Prestige & Acquisition Currency
A public listing on the National Stock Exchange (NSE) or Bombay Stock Exchange (BSE) creates public credibility, strengthens supplier relationships, and provides listed stock that can be used as currency for mergers and acquisitions (M&A).
2. The Complete Step-by-Step IPO Lifecycle in India
The journey from board approval to ringing the opening bell on Dalal Street follows a rigorous regulatory sequence governed by SEBI:
Appointment of Merchant Bankers (BRLMs)
The company appoints SEBI-registered Category-I Merchant Bankers (Book Running Lead Managers) to conduct financial due diligence, draft legal prospectuses, and orchestrate investor roadshows.
Filing the DRHP with SEBI
The Draft Red Herring Prospectus is submitted to SEBI and made public for at least 21 days for investor scrutiny. SEBI reviews the disclosures and issues observation letters requiring clarifications or amendments.
Filing the RHP & Announcing the Price Band
Once SEBI clears the draft, the finalized Red Herring Prospectus (RHP) is filed with the Registrar of Companies (ROC). The company officially announces the issue opening/closing dates, lot size, and price band (e.g., ₹280 to ₹295).
Anchor Investor Bidding (1 Day Prior)
Anchor institutions (mutual funds, sovereign wealth funds) bid for shares exactly one working day before the public launch, establishing institutional pricing confidence.
Public Bidding Window (3 Working Days)
Retail, HNI, and institutional investors place electronic bids via ASBA net banking or broker UPI apps between 10:00 AM and 5:00 PM. Application funds remain lien-blocked in applicants' bank accounts.
T+3 Settlement: Allotment, Unblocking & Listing
Within 3 working days: basis of allotment is finalized (T+1), unsuccessful applicants have blocked funds unblocked while allottees receive Demat share credits (T+2), and shares begin official trading on BSE and NSE at 10:00 AM (T+3).
3. The Three Investor Categories: Who Can Apply?
In an Indian public issue, SEBI regulations allocate distinct portions of the total shares to different categories of investors:
| Investor Category | Investment Range | Standard Quota Allocation | Allotment Methodology |
|---|---|---|---|
| Retail Individual Investors (RII) | Up to ₹2,00,000 | Minimum 35% of Issue | Randomized Computer Lottery (1 lot per winning PAN) |
| Small HNI (sHNI) | ₹2,00,000 to ₹10,00,000 | 5% of Issue (One-third of NII) | Lottery for minimum HNI lot |
| Big HNI (bHNI) | Above ₹10,00,000 | 10% of Issue (Two-thirds of NII) | Lottery with higher ticket sizes |
| Qualified Institutional Buyers (QIB) | Institutional Capital | Up to 50% of Issue | Proportional allocation based on bid size |
4. Understanding Lot Size & Minimum Investment Calculations
Unlike secondary market trading where you can buy a single share, IPO applications in India must be submitted in Lots.
• SEBI Ticket Size Mandate: SEBI specifies that 1 retail lot must be priced as close as possible to ₹14,000 – ₹15,000.
• Lot Size Formula: Lot Size = Target Ticket Size (₹15,000) ÷ Upper Price Band (₹).
• Example: If a company sets a price band of ₹480 to ₹500 per share, the lot size is set at 30 shares (30 shares × ₹500 = ₹15,000 application value).
Note: For SME IPOs, the ticket size is substantially larger—mandated at a minimum of ₹1,00,000 to ₹1,25,000 per lot to discourage undercapitalized retail speculation. Read our Mainboard vs SME Comparison Guide.
5. How Share Allotment Works in Oversubscribed Issues
In popular IPOs, the retail category is frequently oversubscribed 10x, 30x, or even 100x. When this happens, SEBI ICDR Rule 32 governs the distribution:
The 1-Lot Lottery Rule:
Every retail applicant who submits a valid bid at the cut-off price is entered into an automated, computerized lottery. Each selected applicant receives strictly ONE minimum lot, regardless of whether they applied for 1 lot or 13 lots.
💡 Pro Tip: Never apply for multiple lots under a single PAN. To maximize your family's chances, apply for 1 lot each from individual Demat accounts owned by different family members (e.g., self, spouse, parents).
Frequently Asked Questions (FAQs)
What is an Initial Public Offering (IPO)?
An Initial Public Offering (IPO) is the financial process where a privately held company sells shares of its stock to the public for the first time, transitioning into a publicly traded corporation listed on stock exchanges such as NSE and BSE to raise equity capital from institutional and retail investors.
Why do companies launch an IPO?
Companies launch an IPO to raise fresh capital for business expansion, repay existing debt, fund research and capital expenditure (capex), provide an exit liquidity event for early venture capital and private equity investors, and enhance corporate prestige and brand visibility.
What are the three main investor categories in an Indian IPO?
Under SEBI regulations, an IPO offer book is divided into: 1) Retail Individual Investors (RII) applying for up to ₹2,00,000 (minimum 35% quota in profitable companies); 2) Non-Institutional Investors (NII/HNI) applying for more than ₹2,00,000 (15% quota); and 3) Qualified Institutional Buyers (QIBs) including mutual funds, banks, and FIIs (up to 50% quota).
What is an IPO Lot Size?
A lot size is the minimum fixed number of shares an investor must bid for in an IPO. In India, SEBI mandates that the minimum application value for retail investors must fall between ₹14,000 and ₹15,000 per lot. Investors can only bid in exact multiples of this lot size.
What is the difference between a DRHP and an RHP?
A DRHP (Draft Red Herring Prospectus) is the preliminary draft filed with SEBI for regulatory review and public comments without price or date details. An RHP (Red Herring Prospectus) is the finalized statutory document filed with the Registrar of Companies (ROC) containing complete company financials, issue dates, and price band details.
How does the IPO share allotment process work in India?
When the retail portion is oversubscribed, SEBI mandates allotment via a computerized random lottery draw where each selected PAN card receives strictly one minimum lot. Bidding for more retail lots does not increase your lottery probability.
What is the T+3 listing timeline in Indian stock markets?
T+3 is SEBI's mandatory settlement timeline where an IPO must complete its basis of allotment, fund unblocking, Demat share credits, and official stock exchange listing on BSE and NSE within 3 working days after the issue closing date (T).
What are the primary risks of investing in IPOs?
Key risks include lack of publicly traded historical price discovery, aggressive pre-IPO promoter valuations, general stock market correction risks during the bidding window, and listing day volatility once secondary market trading commences.