IPOs in India: The Complete 2026 Guide

Every few weeks a company invites the public to buy its shares for the first time, and for about ten days the business pages become a carnival: price bands, subscription multiples, grey-market whispers, listing-day gains and losses. The mechanics underneath the carnival are few and fixed, and once you know them, IPOs stop being a lottery you hear about and become a process you can evaluate. This guide is the map for our IPO cluster — how an issue actually gets built, who gets which slice, how the money is blocked, how allotment really works, and how to think about the whole exercise without getting carried away. Where a topic owns its own post, I hand it off by name.

How an IPO actually works

An IPO — initial public offering — is a company selling shares to the public for the first time on a recognised exchange, under the SEBI (Issue of Capital and Disclosure Requirements) Regulations, 2018. The company files a draft red herring prospectus (DRHP) with SEBI; SEBI and the exchanges review disclosures; the company then announces a price band — a floor and a cap — within which investors bid.

Almost every mainboard IPO today is a book-built issue. Investors bid for shares at a price within the band over the three-day bidding window; the company and its merchant bankers read the book of demand at each price level and fix the final issue price somewhere inside it. SEBI caps the band's width: the cap price can be at most 120% of the floor price, so a band of ₹100-120 is possible, ₹100-150 is not. Source: SEBI, General Information Document for Investing in Public Offers (sebi.gov.in).

As a retail investor you bid at the cut-off price, which simply means whatever final price the book settles at — you are not guessing the number, you are agreeing to it whatever it turns out to be. Most retail applications land at the cap price, and the final price often is the cap, because strong demand pushes the book to the top.

Shares come in lots. The issuer fixes the lot size so that one lot is worth roughly ₹10,000-15,000 at the floor price — the minimum application value SEBI prescribes — and you apply in whole lots (one lot, two lots, three). Source: SEBI, General Information Document for Investing in Public Offers. A ₹800 share might have a lot of 15-18 shares; a ₹2,000 share might have 7-8.

Who gets what: the quota system

The public offer is not one pot. SEBI's ICDR framework slices the net offer into quotas by investor category:

Source: SEBI ICDR Regulations, 2018, Regulation 43 (text current as on October 30, 2026, via the CAIRR statute mirror); retail individual investor defined by the ₹2 lakh application limit in SEBI's General Information Document.

That 35% retail quota is why ordinary applicants exist in this market at all — no big institution can take your slice. SEBI spent 2025 consulting on cutting it to 25% for mega-issues above ₹5,000 crore, then dropped the proposal and kept 35% for all book-built IPOs. Source: SEBI decision reported by Moneycontrol, August 18, 2025, and Fortune India, August 19, 2025.

One honest paragraph on the big money, because you will see their names in every subscription table. Anchor investors — large institutions — are invited to commit a day before the issue opens: up to 60% of the QIB portion can go to anchors, a third of that reserved for domestic mutual funds, with half their allocation locked for 30 days and half for 90 days. Sources: SEBI anchor-investor framework as summarised by Groww and DhanvanTree, June-July 2026. QIBs bid on the final day in size once they can read the subscription trend; NIIs — individuals bidding ₹2 lakh to ₹5 lakh through UPI, and bigger players above — tend to bid late, at the cap price, often leveraged. Their appetite is real information, but it is rented, not loyal: the same NII book that bids 50 times on a hot issue vanishes on the next one. Watch subscription numbers as weather, not as verdicts.

Applying via UPI-ASBA, step by step

Retail money never moves during the IPO. Under ASBA (Application Supported by Blocked Amount), the application amount is blocked in your own bank account and debited only if you are allotted shares. Individual investors applying through brokers and platforms must use the UPI route, up to ₹5 lakh per application; above that, the ASBA happens through your bank's net-banking. Source: NSE circular on the UPI mechanism for public issues, October 31, 2023 (nseindia.com archives); UPI IPO limit of ₹5 lakh per transaction, up from ₹2 lakh, per NPCI's framework as reported by Global Consultants Review.

The practical sequence:

1. Have a demat account ready. No demat, no IPO — applications are matched to your demat ID, and mismatches here are the top cause of rejection.
2. Open the issue on your broker's app or the exchange platform, pick the lot quantity, confirm the price (cut-off for retail), and enter your UPI ID linked to the same bank account.
3. Approve the mandate. Your bank sends a collect request — the mandate — to your UPI app (GPay, PhonePe, Paytm or your bank's app). You must approve it before the deadline, 5 pm on the day the issue closes for retail. Source: SEBI circular SEBI/HO/CFD/TPD1/CIR/P/2023/140, August 9, 2023, timeline annexure.
4. The block appears in your account as a hold, not a debit. Your money stays yours and keeps earning whatever it earned.
5. Allotment day: allotted shares are debited (the block converts to payment); everything not allotted is unblocked automatically. Under the T+3 schedule, unblocking completes by the afternoon of the second day after issue closure. Source: SEBI circular 2023/140 annexure.

The single most common self-inflicted wound is ignoring the mandate — an unapproved UPI request means the application never actually enters the book. Bid on day one or two, not day three, so a failed mandate leaves you time to retry. Our post IPO Application Rejected? 11 Common Causes in India lists every rejection cause we see repeatedly, from PAN mismatches to multiple applications under one PAN.

Allotment: the retail lottery, and why odds are lumpy

If the retail quota is undersubscribed, everyone gets what they asked for. The interesting case is oversubscription, which is the normal state for anything worth talking about. SEBI's basis of allotment for retail is designed to spread shares as widely as possible: every successful retail applicant receives at least one minimum lot, with the registrar running a computerised draw of lots to decide who gets them. Source: SEBI, General Information Document for Investing in Public Offers.

That design has a consequence most people find counterintuitive: bidding for more lots barely improves your odds. In a 10-times oversubscribed retail book, the registrar's job is to give one lot to as many distinct applicants as the shares allow. One lot and three lots put you in the same lottery with nearly the same chance of a single lot; you have merely parked three times the money to win the same prize. Source: basis-of-allotment mechanics explained by ValueResearch, July 24, 2026. The odds are lumpy because they are binary — you get one lot or you get nothing — and the real lever is not application size but which issues you enter and how many valid applications your household can legitimately make. Our posts IPO Allotment in India: How to Maximize Your Chances (2026) and 6 Ways To Increase IPO Allotment Chances work through those levers in detail — the first for the full mechanics, the second as a quick checklist.

Grey market premium, plainly

Before listing, an unofficial market trades IPO shares and — mostly — trades expectations about them. The grey market premium (GMP) is the extra rupees-per-share over the issue price that grey-market buyers are willing to pay in this unorganised, unregulated market. A ₹500 issue quoted at a ₹60 GMP implies the street expects a listing near ₹560.

Two honest caveats. GMP is a rumour with a price tag — there is no counterparty guarantee, no regulator, no audit trail, and the number can halve overnight if sentiment shifts. And it measures scarcity and hype as much as fundamentals, which is precisely why the companies with the loudest GMPs sometimes list weakest. It is a thermometer, not a forecast. Our post Grey Market Premium (GMP) in IPO: Meaning and Limits owns this topic — how the unofficial market is structured, how Kostak and subject-to rates differ, and why the premium is an unreliable guide to listing-day outcomes.

Listing day: the T+3 clock

Since December 2023, India runs one of the fastest listing pipelines in the world. Shares must list within three working days (T+3) of the issue closing — voluntary for issues opening on or after September 1, 2023, and mandatory for issues opening on or after December 1, 2023. Source: SEBI circular SEBI/HO/CFD/TPD1/CIR/P/2023/140, August 9, 2023. (Earlier coverage often cites a December 2024 change; the binding date in the circular itself is December 1, 2023.)

The clock inside those three days, straight from the circular's annexure:

The speed cuts the limbo where your money sits blocked while grey-market sentiment whipsaws, and it concentrates all the action: allotment news, unblocking and the listing pop now land inside a single working week. If a stock lists at 9:15 on T+3 and you want out, the exit is a market order in the first minutes — and a 20% short-term tax bill waiting for you if the gain is real (next section). Our post Upcoming IPOs in India: Track, Apply, Allotment Basics keeps a running view of the pipeline and how to track each issue through these stages.

The tax, in one honest line

Allotment itself triggers no tax — shares credited to your demat account are just an investment. Sell within 12 months and the gain is short-term capital gain at 20%; sell after 12 months and it is long-term at 12.5% on gains above ₹1.25 lakh a year. Source: Finance (No. 2) Act, 2024 rates, as applied to listed equity per incometaxindia.gov.in. Our post Tax on IPO Allotment and Listing Gains (2026 Rules) owns the worked examples, the advance-tax timing and the Form 26AS mechanics — read it before your first listing-day sale rather than after.

Apply for the story or the listing pop — never both

Every IPO application is secretly one of two very different bets, and confusion between them is where retail money gets hurt.

The listing-pop bet: apply because demand is hot, GMP is positive, subscription is heavy — and sell on listing day, because the thesis was never the company, it was the opening print. There is nothing shameful in this trade, but it has the discipline of any trade: fixed horizon, exit planned, tax priced in, profits not doubled down into. The people it hurts are the ones who apply for the pop, get no allotment, and buy the same stock in the open market at a premium at 10:30 am.

The story bet: apply because you want to own this business for years — a boring lender that compounds, a manufacturer with a genuine moat — at what you judge a fair price. For this bet, listing day is noise; the anchor investors' 90-day lock-in expiring, the first quarterly result and the promoter's shareholding behaviour matter infinitely more. Apply, get allotted or not, and if not, buy from the market after the hype clears — nothing obliges you to own it only via allotment.

What kills portfolios is the hybrid: a pop thesis quietly upgraded into a story thesis after the stock falls 20% below the listing price, with no research to support either. Decide which bet you are making before you tap Apply, and write it down.

For the cautionary version of this whole lesson, our post SBI Card IPO: Rs 755 Issue to Rs 525 in 2026 — Full Story follows one widely-applied listing through years of price action — what the issue promised, what the stock did, and what a patient holder actually experienced.

Where to go next in this cluster

If you are tracking what is coming: Upcoming IPOs in India: Track, Apply, Allotment Basics. If you want better odds: the allotment-chances pair — the 2026 mechanics post and the 6-ways checklist. If your application failed: the rejection-causes post. If you are tempted by the grey market: the GMP post, before you transfer a rupee. If you are selling: the tax post. And if you want to see how all of this plays out over years, not days: the SBI Card case study. The cluster is sequenced from pipeline to mechanics to after-effects — the order in which most investors meet them.

This guide is educational, not investment advice. IPOs carry the risk of loss of capital, and past listing performance says nothing about the next issue. Read the red herring prospectus before applying, and consult a SEBI-registered advisor for decisions specific to your situation.