IPO Return Calculator

In an oversubscribed retail IPO the allotment is a lottery — your application is one of many competing for a fixed pool of shares, and the registrar's random draw simply did not pick your application. The probability of winning the lottery is roughly 1 ÷ subscription_times. So if retail subscribed 10×, your chance per application is about 10%; if it subscribed 25×, the chance falls to about 4%. There is no preference for application size in the retail category beyond ₹2 lakh — applying for 1 lot or 10 lots makes no difference to your chance of winning (the maximum allotment if you win is still 1 lot). The only ways to improve odds are to apply with multiple separate PANs (e.g., spouse, parents) since SEBI rules forbid multiple applications from the same PAN.

Grey Market Premium (GMP) is an unofficial indicator of the price at which IPO shares are being bought and sold in the grey market — an off-market trade between investors and dealers that happens after the IPO is announced but before the shares are listed on the exchange. It is NOT regulated by SEBI and has no official source. Platforms like Chittorgarh, InvestorGain, and IPOWatch publish GMP estimates by polling grey-market dealers.

A ₹100 GMP on a ₹300 issue price means dealers expect listing around ₹400. GMP often moves sharply in the final 1-2 days before listing based on subscription demand and overall market sentiment. Important: actual listing prices frequently diverge from GMP — sometimes by 30-50% in either direction. Treat GMP as one signal among many, not as a guarantee.

There is no universal answer — it depends on (1) your view of the company's fundamentals and valuation post-listing, (2) the size of the listing pop versus your target return, and (3) your tax horizon. Common heuristics retail investors use:

• If the listing pop is significantly above expectations (e.g., > 50% on a ₹300 issue), booking partial profits on listing day to recover the allotted capital and letting the rest "run" is a popular play.
• If the listing is muted or flat versus a strong fundamental story (e.g., Hyundai Motor India), holding through the first few earnings to let the market absorb the float is reasonable.
• If the listing is at a discount, the decision flips to a fundamentals call — average down or exit.

Tax-wise: gains on listing-day sale are short-term capital gains (STCG) taxed at 20% (FY 2025-26 onwards under the revised Budget 2024 rates); holding for over 12 months converts them to long-term capital gains (LTCG) taxed at 12.5% with the ₹1.25 lakh annual exemption.

SEBI mandates that mainboard IPO shares be split across three investor categories:

• Retail Individual Investors (RII) get 35% of the issue and can apply for up to ₹2,00,000 worth of shares per PAN.
• Non-Institutional Investors (NII / HNI) get 15% of the issue and apply for ₹2,00,001 and above — this category is further subdivided into "small HNI" (₹2-10 lakh) and "big HNI" (above ₹10 lakh) since 2022, with one-third of HNI quota reserved for small HNIs.
• Qualified Institutional Buyers (QIB) — mutual funds, banks, insurers, FPIs — get 50% of the issue and bidding is via book-building with discretionary allotment by the lead managers.

Allotment mechanics also differ: retail uses lottery if oversubscribed, HNI uses proportionate allotment, and QIB uses discretionary allotment by the BRLMs. Most retail investors only need to know that they're competing in the 35% retail pool with a 1-lot lottery cap on oversubscribed issues.