How to Invest in an IPO in Indian Markets

What an IPO Actually Is in the Indian Market

An Initial Public Offering (IPO) is the first time a private company sells its shares to the general public and gets listed on an exchange such as the NSE or BSE. The company raises money, early investors and promoters get a way to sell some holdings, and ordinary investors get a chance to buy in on day one. In India the whole process is governed by the Securities and Exchange Board of India (SEBI), which reviews the offer document and enforces disclosure rules so the public is not sold a story without the numbers behind it.

Almost every mainboard IPO in India today uses the book building method. Instead of one fixed price, the company gives a price band, for example Rs 66 to Rs 70 per share, and investors bid within it. The final price, called the cut off price, is decided by demand. Retail investors usually just tick the cut off option, which means they agree to pay whatever the final price turns out to be. Companies also run a parallel SME IPO route on the NSE Emerge and BSE SME platforms, which has bigger lot sizes and far higher risk, so a first time investor should start with mainboard issues.

The offer is split into three buckets. Qualified Institutional Buyers (QIB) get up to 50 percent, Non Institutional Investors (NII or HNIs) get 15 percent, and Retail Individual Investors (RII) get 35 percent. You are a retail investor as long as your application is for up to Rs 2 lakh. Cross that and you move into the HNI bucket, where the lottery odds and funding work very differently.

GMP, Allotment and Listing Gains Explained With a Real IPO

The old version of this page used an imaginary Company XYZ. That hides the only thing that matters to a real applicant, which is how GMP, allotment and listing gains actually played out. So here is a real, well documented case from the Indian market: the Bajaj Housing Finance IPO of September 2024. All figures below are historical and illustrative, used to teach the mechanics, and are not a prediction of any future IPO.

Bajaj Housing Finance fixed its price band at Rs 66 to Rs 70 per share, with a retail lot size of 214 shares. At the cut off price of Rs 70, one lot cost 214 multiplied by Rs 70, which is Rs 14,980. That is the amount blocked in your bank account through ASBA when you apply for one lot. In the days before listing, the unofficial Grey Market Premium (GMP) hovered around Rs 70 to Rs 75 over the issue price, which is the grey market telling you it expected the share to roughly double on listing.

The issue was one of the most heavily subscribed in Indian history, oversubscribed roughly 64 times overall and the retail portion several times over. When retail demand is that high, you do not get shares just for applying. SEBI rules say every retail applicant must be considered for at least one lot, and the available lots are then handed out by a computer driven lottery. With heavy oversubscription, many applicants got zero lots even though their money was blocked. On listing, the share opened around Rs 150 against the Rs 70 issue price. An investor who was allotted one lot of 214 shares and sold at roughly Rs 150 saw the worked numbers below.

Worked Numeric Example: One Lot of Bajaj Housing Finance

Here is the full money trail for one retail lot, using the real issue price, real lot size and the actual listing day area. Numbers are rounded and illustrative. Brokerage on IPO allotment is usually zero at discount brokers, but selling on listing day attracts the standard charges, so those are included to keep the example honest.

Read that table carefully, because it shows the two things hype never mentions. First, your gain is only on the lot or lots you were actually allotted, not on what you applied for. In a 64 times oversubscribed issue, most applicants got one lot or none. Second, the tax bite is real. A listing day sale is a Short Term Capital Gain taxed at 20 percent under the rules effective from 23 July 2024, so on a Rs 17,120 gain you hand roughly Rs 3,424 to the government. The grey market premium quoted Rs 70 to 75, but your actual net came out lower once allotment odds, charges and tax were applied.

How Allotment Really Works When an IPO Is Oversubscribed

This is the part most new investors get wrong. In the retail category, SEBI requires that allotment be done in multiples of the minimum lot, and every valid applicant is first considered for one lot. If the retail portion is oversubscribed, say 8 times, there are not enough lots for everyone, so a computerised lottery decides who gets the one guaranteed lot. The draw is random and audited by the registrar, companies like KFin Technologies or Link Intime, under the watch of a stock exchange official.

Two practical consequences follow. One, in a heavily oversubscribed retail bucket, applying for five lots does not make you five times more likely to get shares. You are still competing for that single lot per PAN, and the extra lots only matter if oversubscription is mild. Two, you cannot apply more than once from the same PAN. Multiple applications under one PAN are rejected outright, which is why families sometimes apply through separate demat accounts held by different people, each with their own PAN and bank account.

• One PAN equals one valid retail application. Duplicates are rejected by the registrar.
• In a heavily oversubscribed issue, applying for one lot at cut off gives you essentially the same odds as applying for many lots.
• Allotment status appears on the registrar website and your broker app, usually a few days after the issue closes.
• If you are not allotted, ASBA releases the blocked amount automatically. You do not need to chase a refund.

Step by Step: Applying for an IPO Through ASBA or UPI

To apply you need a demat account, a linked bank account and a PAN. Most retail investors now apply through the UPI route inside their broker app, which is a form of ASBA. You select the IPO, choose the number of lots and the cut off price, enter your UPI ID, and approve a mandate request in your UPI app. That mandate blocks the money in your bank account. It is not debited. If you get an allotment, the exact amount for the allotted shares is debited and the shares land in your demat account. If you get nothing, the block is released, usually within a day of the basis of allotment.

• Open and verify a demat and trading account with a SEBI registered broker.
• Pick a mainboard IPO and read the price band, lot size and the Red Herring Prospectus on the SEBI or exchange site.
• Place a bid at the cut off price for the number of lots you can afford to block.
• Approve the UPI mandate so the amount is blocked, not spent.
• Check allotment on the registrar website after the issue closes, then watch the listing.
• Decide in advance whether you sell on listing for a quick gain or hold for the long term, because that choice changes your tax.

The Tax on Listing Gains and Why Holding Period Matters

Tax is where many IPO flippers lose part of their gain without realising it. Under the rules effective from 23 July 2024, listed equity shares sold within 12 months are taxed as Short Term Capital Gains at 20 percent. Shares held longer than 12 months are Long Term Capital Gains at 12.5 percent, and the first Rs 1.25 lakh of long term equity gains in a financial year is exempt. Selling on listing day is almost always short term, so plan for the 20 percent.

So in our Bajaj Housing Finance example, selling on listing day put the gain in the short term bucket at 20 percent. If instead you had held the same 214 shares past 12 months and your total long term equity gains for that financial year stayed under Rs 1.25 lakh, the tax could have been zero. This is a real trade off between locking a quick listing gain and a lower tax rate later. Note this is capital gains tax for an ordinary investor. If you trade futures and options, that is a different world, taxed as business income at your slab rate, not as capital gains, so do not mix the two.

Reading the Prospectus and Judging the Valuation

The single most useful document is the Red Herring Prospectus (RHP), filed with SEBI and available free on the SEBI and exchange websites. Skip the marketing pages and go to the financials. Look at three years of revenue and profit, the debt level, and the objects of the issue, which tell you whether the money is funding growth or just letting early investors cash out through an Offer For Sale. An IPO that is mostly an Offer For Sale puts none of your money into the company itself.

Then judge the price. Compare the IPO Price to Earnings (PE) ratio against already listed peers in the same sector. If a company is asking for a PE far above established, profitable peers without a clear reason, the listing pop may already be priced in, and you are paying tomorrow's growth today. The grey market can stay euphoric right up to listing and then the stock can drift down for months once the hype fades, which is exactly what happened to several heavily marketed 2024 listings.

• Check three years of revenue, profit and debt in the RHP, not just the latest glossy slide.
• See how much of the issue is fresh capital for the company versus an Offer For Sale by existing holders.
• Compare the asking PE ratio to listed peers in the same industry.
• Read the risk factors section. Companies are legally required to disclose the ugly parts there.

GMP Versus Reality: Why High Premium Is Not a Guarantee

The grey market is an informal network of dealers who buy and sell IPO applications and shares before listing. The GMP they quote is just the extra rupees they are willing to pay over the issue price right now. It is unofficial, unregulated and has no settlement guarantee. A Rs 50 GMP on a Rs 100 issue price suggests dealers expect a listing near Rs 150, but that expectation can evaporate on a bad market day.

In 2024 the Indian market saw both sides of this. Bajaj Housing Finance had a strong GMP and delivered a large listing gain. But several high profile IPOs that carried decent grey market buzz listed flat or below their issue price, leaving applicants who had treated GMP as a promise sitting on a loss. The honest takeaway is that GMP is a crowd mood reading, useful for gauging hype, useless as a guarantee. Position size accordingly and never borrow money to apply chasing a GMP number.

Anchor Investors, Lock In and What Happens After Listing

A day before the issue opens, the company allots shares to anchor investors, large institutions like mutual funds and insurers, out of the QIB portion. Strong, well known anchors signal institutional confidence, but remember they get deeper access and analysis than you do, so their presence is a hint, not a green light. Anchor shares carry their own lock in, with a portion locked for 30 days and the rest for 90 days under current SEBI rules, which affects how much stock can hit the market soon after listing.

Promoter shares face a longer lock in, generally at least one year for the minimum promoter contribution. When a big lock in expires, a wave of shares can become sellable, which sometimes pressures the price. After listing, your job shifts from applicant to shareholder. Track quarterly results, management guidance and how the stock holds up once the listing excitement cools. A great application strategy means nothing if you ignore the company for the next four quarters.

• Anchor allotment happens one day before the IPO opens and signals institutional interest.
• Anchor lock in is split, with part released after 30 days and part after 90 days.
• Promoter minimum contribution is typically locked in for at least one year.
• Lock in expiry can add selling pressure, so note those dates if you hold for the long term.

Common Mistakes First Time IPO Investors Make

The biggest error is treating an IPO like a guaranteed lottery win. It is not. The second is blocking far more money than you can spare, then being unable to use it for days while it sits frozen under ASBA. The third is bidding below the cut off price to feel safe, which simply gets your application rejected. And the fourth is forgetting the tax, then being surprised that a 20 percent short term capital gains charge ate into the listing gain.

• Treating GMP as a promise rather than an unofficial sentiment reading.
• Applying for more lots than you can afford to have blocked, hurting your liquidity for a week.
• Bidding below the cut off price and getting rejected.
• Applying multiple times from one PAN, which the registrar rejects.
• Forgetting that a listing day sale is taxed at 20 percent short term, not tax free.

Sources and Further Reading

For authoritative data and current rules, refer to SEBI (Securities and Exchange Board of India), NSE India and SEBI Investor Education. Lot sizes, price bands, GMP and listing prices change with every issue, so always confirm the live figures in the Red Herring Prospectus and the registrar website before you apply. All numeric examples on this page are historical and illustrative and are not a forecast or a promise of returns.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to SEBI (Securities and Exchange Board of India), NSE India and SEBI Investor Education. Always confirm current rules, rates and contract specifications on the official source before you trade.