Understanding the T+3 IPO Cycle
In a major regulatory step to improve capital efficiency for retail investors, the Securities and Exchange Board of India (SEBI) mandated the reduction of the public issue timeline from six working days (T+6) to three working days (T+3). Under this framework, companies that tap the primary market via Initial Public Offerings (IPOs) must list on stock exchanges such as the National Stock Exchange (NSE) and BSE within three business days of the bidding window closing.
For retail investors, this compressed timeline significantly reduces the duration during which application funds remain blocked under the Application Supported by Blocked Amount (ASBA) or UPI mandate mechanism. It also limits exposure to broader market volatility between the close of an offer and the commencement of trading.
What Does ‘T’ Mean?
In market terminology, ‘T’ represents the issue closing date—the final day on which bids are accepted from investors. The days following are designated as T+1, T+2, and T+3. Crucially, these denote working days as recognized by Indian equity clearing corporations, excluding public holidays, Saturdays, and Sundays.
The Day-by-Day T+3 Breakdown
Here is what happens at every stage of the compressed IPO lifecycle:
Day T: Issue Close and Mandate Cut-Off
Day T marks the final day of the subscription period. Bidding typically closes at 5:00 PM for retail applicants. Investors using the UPI mandate route must approve the block request sent by their bank or UPI application before the specified cut-off time (usually 5:00 PM on Day T). After the window shuts, the stock exchanges (NSE and BSE) consolidate the bidding data and pass electronic application files to the issue’s designated Registrar and Share Transfer Agent (RTA).
Day T+1: Basis of Allotment
On Day T+1, the Registrar processes the validated bids, eliminates invalid or duplicate applications, and formulates the Basis of Allotment in compliance with SEBI’s prescribed proportional and lottery-based rules for oversubscribed categories.
- Exchange Approval: The designated exchange reviews and formally approves the Basis of Allotment.
- Status Publication: Once approved, the Registrar uploads the allotment data to its public portal, enabling investors to verify whether their application was successful using their PAN, application number, or DP ID.
Day T+2: Demat Credit and Fund Unblocking
Day T+2 focuses on clearing and settlement processing between depositories, sponsor banks, and investor accounts.
- Demat Allocation: Successful applicants receive their allotted shares directly into their demat accounts maintained with the Central Depository Services (India) Limited (CDSL) or National Securities Depository Limited (NSDL).
- Fund Debit / Lien Revocation: For allottees, sponsor banks debit the blocked amount from their bank accounts. For applicants who received no allotment (or partial allotment in non-retail categories), banks initiate the mandate revocation process to release the lien on the blocked funds.
- Listing Notice: The exchanges issue an official listing circular confirming the approved trading symbol, ISIN, and the exact date and session for the listing debut.
Day T+3: Listing and Trading Debut
Day T+3 is listing day. The stock makes its formal debut on the trading floors of the NSE and BSE.
- Pre-Open Call Auction: Between 9:00 AM and 9:45 AM, an equilibrium price is determined through a dedicated pre-open call auction session designed to minimize opening volatility.
- Normal Trading: Continuous market trading begins at 10:00 AM. Investors who were allotted shares can sell them freely, while non-allottees can purchase shares directly in the secondary market.
Timeline Summary at a Glance
| Timeline | Key Milestone | Primary Stakeholder Responsible |
|---|---|---|
| Day T | Bidding window closes; UPI mandate validation ends | Investors, Stock Exchanges, Sponsor Banks |
| Day T+1 | Finalization and approval of Basis of Allotment | Registrar, Designated Stock Exchange |
| Day T+2 | Shares credited to demat; funds debited or unblocked | Depositories (CDSL/NSDL), Banks |
| Day T+3 | Pre-open auction (9:00 AM) and formal trading begins (10:00 AM) | NSE, BSE, Market Participants |
Illustrative Example: Retail Application
To visualize how cash and securities move under T+3, consider a round-number illustrative scenario:
- Hypothetical Lot Size: 100 shares
- Hypothetical Issue Price: ₹100 per share
- Total Blocked Amount: ₹10,000
Note: The following numbers are purely illustrative and do not reflect any live offering.
- On Day T: The investor places a bid for 1 lot and authorizes a UPI mandate blocking ₹10,000 in their savings account. The funds remain in the account, earning standard interest, but cannot be spent.
- On Day T+1: The Registrar processes the bids. The investor checks the RTA portal late in the evening and confirms they have been successfully allotted 100 shares.
- On Day T+2: The bank debits ₹10,000 from the investor’s balance. Later that evening, the investor receives an SMS/email from CDSL or NSDL confirming that 100 equity shares have been credited to their demat account.
- On Day T+3: The company’s ticker starts trading at 10:00 AM. The investor now holds liquid equity shares available for trade.
- Alternative Scenario (Non-Allotment): If zero shares were allotted on Day T+1, no funds are debited on Day T+2. Instead, the bank releases the ₹10,000 lien, making the balance fully accessible on Day T+2.
Common Mistakes and Practical Tips
- Delaying UPI Approval: While bidding technically closes in the late afternoon on Day T, bank payment gateways often experience traffic congestion. Submitting bids and approving mandates well before the cut-off avoids dropped transactions.
- Confusing Calendar Days with Working Days: If Day T falls on a Friday, Day T+1 is Monday (assuming normal trading schedules). Saturdays, Sundays, and clearing holidays do not count toward the T+3 timeline.
- Premature Grievances for Lien Releases: Banks process unblocking mandates in batches throughout Day T+2 and early Day T+3. A lien not disappearing immediately on Day T+1 is normal operational processing, not an error.
- Checking the Incorrect Portal: Allotment data is uploaded to the designated Registrar’s portal first, followed by BSE and NSE allotment check tools. It does not appear on your broking app until demat credit occurs on Day T+2.
Frequently Asked Questions (FAQ)
Can I sell my allotted shares immediately at 10:00 AM on Day T+3?
Yes. Once shares are credited to your demat account by Day T+2, they are fully settlement-ready. You can place market or limit sell orders during regular market hours starting at 10:00 AM on Day T+3, or participate in the pre-open session between 9:00 AM and 9:45 AM.
What should I do if my bank lien is not unblocked by Day T+3?
If funds remain blocked after the listing day, raise a ticket with your bank’s ASBA/UPI grievance cell with your Application Number and UPI Mandate Reference Number (UMN). You may also lodge a query with the issue’s designated Registrar or register a complaint on SEBI’s SCORES portal.
Does T+3 apply to both Mainboard and SME IPOs?
Yes. SEBI guidelines specify the T+3 listing requirement for all public offerings, covering both Mainboard listings and SME platform issues across NSE and BSE.
SEBI Compliance & Statutory Disclaimer: this guide is for education only and is not investment advice. IPO Bulletin is not a SEBI-registered investment adviser. Rules referred to are set by SEBI, NSE and BSE; check the latest circulars before you apply.
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