IPO listing day in India (T+3)

The IPO listing day is the first day on which the shares allotted in an Initial Public Offering (IPO) are admitted to trading on a recognised stock exchange in India. Under the timeline mandated by SEBI circular SEBI/HO/CFD/TPD1/CIR/P/2023/140 dated 9 August 2023 (effective 1 December 2023), the listing day falls on T+3, where T is the last day of the IPO subscription window. The term T+3 refers to the third working day after bid closure: if the issue closes on a Monday, listing occurs on Thursday (assuming no public holidays intervene on the intervening days).

On listing day, the shares emerge from the primary market and enter the secondary market. An allottee who received shares through the basis of allotment process becomes a market participant like any other equity holder and may choose to sell, hold, or buy more shares through a broker’s trading interface. The listing-day price is discovered through the exchange’s special pre-open session for IPO listings, not through the standard call-auction or continuous trading mechanism.

The T+3 timeline in context

The T+3 regime was introduced specifically to reduce the period during which the application amount of unsuccessful bidders remained blocked in their bank accounts. Under the previous T+6 regime (which itself had replaced the original T+15 to T+21 process), unsuccessful retail applicants had their UPI mandates or bank blocks held for six working days after bid closure. The compression to T+3 halved this wait and brought India’s primary-market settlement cycle into closer alignment with its secondary-market T+1 settlement.

Demat credit: before listing day trading begins

Allotted shares are credited to the allottee’s demat account on T+2, the day before listing. For CDSL -held demat accounts, the credit typically appears in the morning of T+2; for NSDL -held accounts the credit may arrive during the afternoon or evening of T+2, depending on the depository’s batch processing schedule. The allottee can verify the credit by:

• Checking the demat account holdings section of the broker’s app (for example, Zerodha Console or the Kite holdings page).
• Logging into the CDSL or NSDL portal directly using the registered mobile number.
• Checking the allotment status portal of the registrar (KFin Technologies at ipostatus.kfintech.com or Link Intime at linkintime.co.in) which shows the allotted quantity.

Block release for unsuccessful applicants

On T+2, unsuccessful retail applicants have their UPI ASBA mandates cancelled and their bank ASBA liens released. For UPI ASBA applicants, the release appears as a return of the available balance in the bank account; the mandate status in the UPI app changes to Cancelled or Expired. For bank ASBA applicants, the lien disappears from the bank’s NetBanking holds section. SEBI requires the release to be completed by the end of T+2; delays beyond this are reportable violations. In practice, the release for UPI ASBA applicants happens almost instantaneously through the NPCI mandate-API rails once the registrar sends the release instruction.

Partially unsuccessful applicants (those allotted fewer lots than applied for, a scenario that occurs in NII proportionate allotment, not in retail lottery) have only the unallotted portion’s block released; the allotted portion is debited and the balance released simultaneously on T+2.

The listing-day pre-open session

The pre-open session for IPO listings is a special auction mechanism operated by NSE and BSE, distinct from the standard nine-minute pre-open session that precedes regular trading on all other days.

Structure of the IPO pre-open session

The IPO pre-open session begins at 9:00 AM IST on the listing day and runs for 45 minutes in two phases:

Phase 1 (9:00 AM to 9:45 AM): order collection. During this phase, investors can submit buy and sell orders for the IPO shares at any price, can modify existing orders, and can cancel orders. No trades are executed during this phase.

Phase 2 (9:45 AM to 10:00 AM): order matching and price discovery. The exchange’s matching engine runs a call auction at the end of the collection phase. It identifies the price at which the maximum quantity of shares can be matched between buy and sell orders; this is the listing price (sometimes called the discovered price or opening price). All matched orders are executed at this single clearing price. Orders that could not be matched (because the buy orders were below the clearing price or the sell orders were above it) are carried forward into regular trading, which begins at 9:15 AM, note that although Phase 2 runs until 10:00 AM, regular trading begins at 9:15 AM because the exchange runs the IPO pre-open session at a faster pace for smaller issues; for most practical purposes, investors can expect regular trading by 9:15 AM to 9:30 AM.

The listing price discovered in the pre-open session is used as the price band reference for the continuous trading session’s upper and lower circuit filters.

Circuit filters on listing day

On the first day of trading, NSE and BSE apply a 90% circuit filter on the listing price discovered in the pre-open session. This means the share price can move up to 90% above or below the listing price during the continuous trading session on listing day without triggering a circuit breaker halt. From the second day of trading, normal circuit filter percentages (5%, 10%, or 20% depending on the exchange classification of the security) apply.

The 90% filter is specific to the listing day and is intended to allow price discovery in an environment of genuine uncertainty about the secondary-market equilibrium for a newly listed share. Without this relaxed filter, a share that opens significantly above or below the issue price could hit a circuit within minutes.

What determines the listing price

The listing price is determined by the pre-open order book, specifically by the orders placed by investors during the 45-minute pre-open collection phase. Factors that influence the distribution of buy and sell orders in the pre-open session include:

Grey-market premium (GMP). The informal secondary market for IPO applications (the “grey market”) trades approximations of the listing price before the issue opens. High GMPs (for example, a GMP of ₹200 on an issue priced at ₹500, implying a 40% listing premium) attract sell orders from allottees who wish to capture the premium and attract buy orders from investors who missed the allotment and want to acquire shares at listing. The GMP is entirely informal and unregulated; it is not disclosed in the Red Herring Prospectus and is not endorsed by any exchange or regulator.

Subscription multiples. A heavily oversubscribed issue (50× retail, for instance) implies that many investors who applied did not receive allotment and may wish to buy on listing day; this demand supports a higher listing price. Conversely, a barely subscribed issue (0.95× overall) may see selling pressure from allottees who are uncertain about secondary-market support.

Anchor investor lock-in. The 30/90-day lock-in on anchor investor shares means that a significant portion of allotted shares cannot be sold on listing day, reducing the supply of shares available for the pre-open session.

Market conditions. The broader equity market on listing day, Nifty 50 and Sensex movements, influence the buy-sell sentiment for the IPO on listing day, particularly for IPOs in cyclically sensitive sectors.

Selling IPO shares on listing day

An allottee who wishes to sell shares on listing day can place a sell order in the pre-open session (from 9:00 AM) or in the regular trading session (from 9:15 AM onwards). For the pre-open session, the sell order may be placed at a limit price or as a market order.

Tax implications of same-day sale. Shares sold on listing day (T+3 from issue close) are held for only three days, well within the twelve-month threshold for short-term capital gains. The gain, the difference between the sale price and the issue price (the cost of acquisition), is taxed as a Short-Term Capital Gain (STCG) at 20% (post Finance (No. 2) Act 2024 rate) plus surcharge and cess. For detailed tax treatment see the relevant capital gains articles; the companion article on taxation of listing-day gains provides a worked example.

STT on sale. Securities Transaction Tax at 0.1% of the sale turnover (applicable to delivery-based equity sales) is collected by the broker at the time of the transaction.

Common listing day scenarios

Strong premium listing. The share opens 30%-100% or more above the issue price. Allottees who sell in the pre-open or early continuous session capture the gain; allottees who hold face the risk that the premium narrows in intraday trading as sellers dominate.

Flat listing. The share opens at or very near the issue price. This is common for IPOs that were only marginally oversubscribed or where the grey-market premium was negligible. Allottees who sell at issue price make no gain (before costs) and no loss. The secondary-market trajectory then depends on the company’s operational performance.

Listing below issue price (“listing at a discount”). The share opens below the issue price. Allottees who sell crystallise a capital loss; allottees who hold face an unrealised mark-to-market loss but are not obligated to sell. Listing at a discount is more common in poor market conditions, in overpriced issues, or in issues where material negative information emerges between issue close and listing.

Circuit hit on listing day. If the listing price is far above the issue price and the pre-open session generates a very high discovered price, the 90% upper circuit filter may be triggered before substantial sell orders can be matched. This can leave allottees wanting to sell unable to find buyers at the circuit-limit price, a phenomenon commonly described as “upper circuit” trading. In this scenario, shares trade only for brief periods when a seller and a buyer are matched below the circuit ceiling.

Listing day for overseas investors and depositary receipts

For Indian companies with ADR (American Depositary Receipt) or GDR (Global Depositary Receipt) programmes running concurrently with their domestic IPO, the listing day dynamics on the domestic exchanges interact with the opening prices on the NYSE or Nasdaq (for ADRs) or on the Luxembourg or London exchanges (for GDRs). Arbitrage between the domestic share price and the implied price of the depositary receipts is handled by the depositary (typically Citibank NA or Deutsche Bank) and authorised participants. Retail domestic investors are generally not affected by the depositary-receipt dynamics, but they should be aware that foreign institutional trading activity on listing day may be partly influenced by the gap between the domestic price and the depositary-receipt-implied price.

Listing day for REIT and InvIT units

REIT (Real Estate Investment Trust) and InvIT (Infrastructure Investment Trust) IPOs follow the same T+3 listing timeline as equity IPOs but trade on different market segments of NSE and BSE. REIT and InvIT units are traded in the Exchange-Traded REIT and InvIT segments of the exchange; these segments have their own lot sizes (typically much larger than equity IPO lots, often ₹1 lakh or more per unit). On listing day, the pre-open session mechanics are the same as for equity IPOs, but the circuit filter percentages may differ from the 90% applicable to first-day equity listings.

REIT and InvIT unit holders who receive allotments and wish to sell on listing day should verify the specific market segment through which their units trade and the applicable trading hours.

Tax implications of holding through the first quarter

An investor who receives an IPO allotment and does not sell on listing day is making a holding decision that has tax implications based on future sale timing:

• Sales within 3-12 months of allotment: attract STCG at 20% (post-2024 Finance Act rates).
• Sales after 12 months of allotment: attract LTCG at 12.5% with the first ₹1,25,000 of aggregate LTCG exempt.

Since the allotment date (T+2 from issue close, the day shares are credited) is the acquisition date for capital-gains purposes, an investor who receives shares on, say, 15 April 2026 would need to sell after 15 April 2027 to qualify for the long-term capital gains rate. The 12-month boundary is measured from the allotment date, not from the listing date or the bid date.

References

1. SEBI Circular SEBI/HO/CFD/TPD1/CIR/P/2023/140 dated 9 August 2023, Reduction of timeline for listing of shares in Public Issue from existing T+6 days to T+3 days, effective 1 December 2023.
2. NSE Exchange Operations Circular on Pre-Open Session for IPO Listings, available at nseindia.com.
3. BSE Notice on IPO Listing Pre-Open Session, available at bseindia.com.
4. SEBI Circular on Circuit Filters for Newly Listed Securities, available at sebi.gov.in.
5. Finance (No. 2) Act, 2024, Section 50, amended STCG rate under section 111A.
6. NPCI Circular dated 8 September 2025, UPI Mandate Cancellation Timeline for IPO Allotment.

See also

• Initial Public Offering , the broader IPO process
• Basis of allotment , the T+1 process that precedes listing day
• UPI ASBA , whose mandate is released on T+2 for unsuccessful applicants
• Bank ASBA NetBanking , whose lien is released on T+2
• Demat account , where allotted shares appear on T+2
• CDSL and NSDL , the depositories crediting shares on T+2
• KFin Technologies and Link Intime , registrars managing the allotment file
• Anchor investor , whose lock-in begins on T+3 (listing day)
• Securities transaction tax , applicable on listing-day sales
• IPO oversubscription and allotment , how oversubscription affects the listing-day supply-demand balance