The Complete Guide to the IPO Allotment Process

There is usually a lot of transaction anxiety in the time between applying for an Initial Public Offering (IPO) and the shares showing up in your demat account. Most retail investors are left staring at a blocked UPI mandate wondering if they applied too late or if the system is stacked against them. But the IPO allotment is a purely mathematical process that is heavily regulated. The regulatory bodies have designed the IPO process to be bias-free and transparent.

What is IPO Allotment?

IPO allotment is the official process of a company and its designated Registrar to allot shares to the investors bidding in the public issue. Shares are allocated through a mathematical draw where demand exceeds supply. This is regulated by SEBI to ensure transparency in the allocation process (i.e., who gets shares and who gets a refund).

“An IPO is basically just a company raising capital by selling ownership to the public for the first time. But it’s not the company that decides who gets these shares. This is the responsibility of an independent entity known as the Registrar. The registrar is a SEBI registered financial institution which is responsible for processing all the applications, verifying the investor details and finalising the distribution of shares. Prior to the modernisation of financial markets, applying for an IPO involved the use of physical cheques. This meant that the investor’s capital was immediately taken out of their bank account and often stuck there for weeks even if they didn’t get any shares. Today the whole process is run on the ASBA (Application Supported by Blocked Amount) system. When you apply, your funds are never taken out of your account, they are just blocked. You keep earning interest on this money until the registrar makes the allotment and actually debits the precise value of the shares you have been allotted. The allotment process is really an audit of demand.

Let’s say a company issues 10 million shares and investors bid for precisely 10 million shares; then everyone gets precisely what they asked for. But in today’s market world, many fundamentally sound companies have demand that is 50 to 100 times greater than the supply. When that happens, the registrar needs a strict, unbiased framework to determine how those limited shares are distributed.

Who Gets What? The Types of Investors

Prior to any allotment of shares, the total pool of available shares shall be divided into specific quotas by statute. This segmentation ensures that large institutional funds cannot leverage their huge capital reserves to crowd out everyday savers from the market. These separate investor categories decide how shares are distributed even before the share allotment process begins, as per Bajaj Finserv. Investors are classified into one of these buckets, depending on how they deploy capital and how regulators classify them.

Comparison Table

Retail Individual Investors (RIIs) are those who apply for shares of value of ₹2 lakh and below. This category is given heavy protection by SEBI to ensure maximum participation from regular savers. If you apply for a standard lot with your UPI ID, you are only participating in this 35% pool.

Non-Institutional Investors (NII) – Those who bid for more than ₹2 lakh. They are commonly known as High Net-worth Individuals (HNIs). This category is further divided into small HNIs, who bid between ₹2 lakh and ₹10 lakh, and big HNIs, who bid over ₹10 lakh.

Mutual funds, insurance companies and foreign portfolio investors are some of the Qualified Institutional Buyers (QIB). They supply the huge capital needed to back an IPO and get the lion’s share of the issue.

This segregation of categories ensures that a retail investor bidding for ₹15,000 is never pitted against a mutual fund bidding for ₹150 crore.

IPO Allotment Process: Step by Step Guide

Once the bidding window closes, the registrar starts a strict sequence of events. The system has to sift through millions of applications, cross-check with banking and depository networks and complete the list of genuine bidders within a few hours. This is a very regulated chronological sequence where the registrar takes the lead as per the standard industry practice documented by the platforms like Groww.

1. Bid Consolidation: The stock exchanges (NSE and BSE) consolidate all bids at 5:00 PM on the last day of the issue. Banks and brokers send the final ASBA mandates to the registrar’s central database.
2. Application Verification & Rejection: The registrar cleans the data to remove invalid bids. The applications are immediately rejected if the UPI mandate is not approved within the stipulated time, or multiple applications are made against the same PAN, or the demat account details are wrong.
3. Determination of the Subscription Ratio: After the invalid bids are rejected, the registrar determines the final demand in each category. They even know the number of times the retail, NII and QIB portions were subscribed.
4. Basis of Allotment Drafting: The registrar carries out a mathematical plotting of the share distribution according to the subscription ratios. The draft is then sent for formal regulatory approval to the stock exchanges.

This backend process is subject to heavy auditing. The registrar has no discretion. Stock exchange officials have to sign off on the precise mathematical basis of allotment, before any moneys are moved or shares credited. This keeps the process clean and book to book.

Allotment Basis: How the Lottery and Pro-Rata Systems Function?

The most misunderstood part of the IPO process is what happens when demand completely overwhelms supply. The “Basis of Allotment” is the official document that describes the exact maths used in the distribution of shares. SEBI’s big idea is to give a minimum lot to the maximum number of distinct individuals for retail investors.

If retail is undersubscribed or fully subscribed (1x) all will get what they asked for. But if the retail tranche is oversubscribed, meaning there are more unique applications than lots available, the registrar has to resort to a lottery system. If there is a heavy oversubscription in a retail category, the registrar conducts a computerized lottery as described by Chittorgarh. Not a pick from a manual out of a hat. It’s a secure, randomised algorithm, and has been audited by the stock exchange. This rule means that if you apply for 10 lots of an oversubscribed IPO, your mathematical chance is exactly the same as applying for 1 lot. The system is based on unique PAN numbers and not on the size of the bids so that the rich retail investors are not able to corner the market. Institutional and high-net-worth allocations are different.

Historically, these categories operated on a pro-rata basis. In case of an HNI issue being subscribed 10 times, an investor applying for 1,000 shares would get exactly 100 shares. But now, recent changes in regulations have introduced lottery dynamics even to the small HNI category, with the aim of giving at least one base lot to as many participants as possible before moving to proportional allocation. Understanding this math reality removes the emotion from the process. In the case of a retail issue which is 50 times oversubscribed math says 49 out of 50 applicants will walk away empty handed. That’s a function of statistical probabilities, not broker quality or timing of the application.

How to Check IPO Allotment Result?

Once the registrar completes the draw and gets exchange approval, the allotment status is released online. Retail investors will no longer have to suffer from transaction anxiety and will know exactly where to look, rather than waiting for a delayed third party email or unconfirmed SMS. The simplest and most precise way to confirm your status is to check directly on the official Registrar’s portal (like Link Intime or KFintech) or the BSE/NSE website. You do not need to log into your brokerage account, as broker platforms often suffer API delays when querying millions of statuses at once. To check your allotment you will require one of three unique identifiers. Your PAN (Permanent Account Number) is the most reliable as your bid is linked with your PAN universally irrespective of the broker you used.

Alternatively, you may use your IPO Application Number, which was generated when you authorized your UPI mandate or the Demat Account Number (16 digit Beneficiary Owner ID). If the allotment is successful, there will be clear mention of the number of shares credited to your account on the portal. If you did not receive any shares, the portal will show that 0 shares were allocated. This confirmation is the formal trigger for the next step, namely the unblocking of the funds and the crediting of the shares, in both cases.

Understanding the New Listing Timeline T + 3 in SEBI

The IPO process used to be painfully slow. Your capital might be frozen for a week or more while the registrar worked through paperwork. Long-term capital lock-ups destroy trust and efficiency, and the regulator knew that when they imposed the T+3 listing requirement. “T” is the Issue Closing Date, the end of the IPO bidding window. The “+3” means the company has three business days to be fully listed on the exchange. This faster timeline delivers retailers unprecedented predictability on their capital. And this is exactly how the T+3 timeline works out:

1. Day 0 (T-Day – Issue Closing): Officially the bidding ends at 5:00PM. Brokers and banks reconcile all ASBA mandates and final data is sent to registrar.
2. Day 1 (T+1 – Basis of Allotment): The registrar does the data cleaning, invalid applications are rejected and if necessary, computerized lottery is done. By the evening, the basis of allotment is finalised and investors can check their status online.
3. Day 2 (T+2 – Refunds + Demat Credit): Execution day. The registrar directs the sponsor banks to execute the ASBA mandates. If you won the lottery then your locked funds are officially debited. If you have not received the shares, the unblock command is sent from the registrar to your bank. The allotted shares are also credited electronically to the investors’ demat accounts through CDSL or NSDL.
4. Day 3 (T+3 – Listing Day): The shares are officially listed on the National Stock Exchange (NSE) and Bombay Stock Exchange (BSE). The trading begins at 10.00 AM and investors can either hold their fresh allotments or sell them.

This compressed framework ensures your capital is never lost in a regulatory void. Since your expectations are mapped to the T+1 and T+2 milestones, you know precisely when to expect a refund and when to expect portfolio credit.

After Allotment: Listing Day, Refunds & Demat Credit

The T+2 marker is where the greatest level of investor anxiety lies. Investors often see they were not allotted shares, yet their UPI mandate still shows as “blocked.” It is crucial to understand that the registrar does not hold your money. Your money is safe in your own bank account, it has just been locked for a while. The registrar sends the unblock command to the sponsor bank at T+2, which then forwards it to your bank. Most major banks unblock the mandate within a few hours but cooperative or regional banks may take another 24 hours to show the unblocked status on your banking app. The capital is perfectly safe all the time earning normal savings account interest.

For those investors who get an allotment, T+2 is when the shares will be credited. You will receive an SMS from CDSL or NSDL confirming that the shares are credited to your demat account successfully. But those shares are effectively frozen. You can’t deal with them until morning on T+3. On Listing Day (T+3), there is a special pre-open session from 9:00 AM to 9:45 AM to find out the listing price based on market demand. Normal trading begins at 10:00 AM on the dot. This is the exact moment that the liquidity wall falls and your allocated stock becomes tradable on the open market as any other publicly traded stock.

First-Come, First-Served vs. Lottery: Debunking Common Myths

The IPO market is highly competitive and investors are often victims of algorithmic myths and “sure-shot” tricks. The biggest misconception is that applying on Day 1 at 10 AM gives you higher priority than applying on Day 3 at 3 PM. That is completely false. The registrar does not evaluate applications in order.

Once you submit your application and your UPI mandate is approved before the last deadline on Day 3, your bid goes into the same hat as all other valid applications, which are then randomized. Timing does not mathematically affect your chance of allotment. A common misconception is that you increase your chances by bidding at the “floor price” (the lower end of the price band) because this shows a conservative investment strategy. In an over-subscribed IPO, shares are almost entirely allocated at the “cut-off price” (the top end of the price band).

If the issue is oversubscribed and you bid below the cut-off, your application will be rejected immediately during the T+1 verification. The system does not see account age, broker prestige, or time of application. It considers only valid PANs bidding for the cut-off price. Remove these myths from your strategy, and you can focus on evaluating the company’s creditworthiness rather than trying to beat the odds of a highly regulated digital lottery.

Conclusion

IPO allotment is not about luck, timing, or who you bank with. It’s a regulated, mathematical process designed to give every valid PAN an equal shot. SEBI’s rules, the registrar’s audits, and the T+3 timeline ensure transparency from bid submission to listing day. For retail investors, the best strategy is simple: apply through ASBA with a valid PAN and demat, bid at the cut-off price, and check the allotment status directly on the registrar’s portal on T+1. Don’t stress over blocked funds on T+2 — they’ll be unblocked automatically if you’re not allotted. In short, understand the quotas, trust the lottery math, and focus on the company’s fundamentals instead of IPO myths. When you know how the system actually works, you can participate with confidence instead of anxiety.

Frequently Asked Questions (FAQs)

Disclaimer

This article is for educational purposes only and is not investment or trading advice. Market-linked investments are subject to risks including loss of principal. Please consult a SEBI-registered advisor before making investment decisions.