IPO Application Guide — How to Apply, Allotment Odds, GMP Reality (2026)

Last verified: April 2026, against SEBI’s 2024 IPO process amendments, current ASBA/UPI mandate framework, and recent IPO subscription patterns from Q1 FY 2025-26.

India’s IPO market is among the most retail-driven globally. Hot IPOs are oversubscribed 50-100×, sending listing-day pops of 30-80%. But “I applied through Zerodha and didn’t get allotment” is the most common retail experience. This guide explains how the IPO application process actually works, why your retail allotment odds in oversubscribed IPOs are 5-15%, what the grey market premium really tells you, and how to play listing day rationally.

The IPO process in 60 seconds

1. Pre-IPO: Company files DRHP (Draft Red Herring Prospectus) with SEBI, gets approval, sets price band (e.g., ₹100-105/share), opens subscription window.
2. Subscription window (3-5 days): Investors apply via ASBA (Application Supported by Blocked Amount) — money blocked but not debited from your bank.
3. Closing day: Subscription totals announced — retail / HNI / QIB allotments calculated.
4. Allotment day: SEBI registry processes allotments. Successful applicants see shares in demat. Unsuccessful: blocked amount released.
5. Listing day (T+3 to T+6): Shares list on NSE/BSE. Initial price discovery in pre-open call auction.

Investor categories and reservation

Category	Allocation	Min ticket	Max ticket	Allotment basis
Retail Individual Investor (RII)	35%	1 lot (₹14-15K typical)	₹2 lakh	Lottery if oversubscribed
Non-Institutional Investor (HNI/NII)	15%	₹2 lakh	None	Proportionate
Qualified Institutional Buyer (QIB)	50%	—	—	Anchor + book-building

Retail and HNI are the categories most retail investors care about. Anchor investors (locked for 30-90 days) get priority sub-allocation in QIB.

How to apply — UPI mandate

1. Login to your demat broker app (Zerodha, Groww, Upstox, Dhan — see demat comparison).
2. Navigate to “IPO” section. Select the IPO.
3. Choose lot quantity (1 lot for retail, multiple lots if you want HNI exposure).
4. Approve UPI mandate via your bank’s UPI app (within 24 hours).
5. Money is blocked in your bank account till allotment day.
6. If allotted: shares credited to demat, money debited.
7. If not allotted: block released within 1-2 days.

Application can be revised (lot quantity changed) till the closing day cut-off. Cancellations also allowed.

Allotment math — why retail odds are 5-15% in hot IPOs

Retail category gets 35% of the IPO. SEBI mandates “minimum allotment” of 1 lot to as many retail applicants as possible, then proportionate beyond.

If a ₹500 Cr retail portion sees ₹15,000 Cr of retail bids (30× oversubscription):

• Total retail applicants: ~10 lakh (assuming average ₹1.5 L application)
• Total lots available: ~33 lakh (₹500 Cr ÷ ₹15K lot value)
• Allotment ratio: 33 / (~33 from each applicant max) — works out to ~1 in 5 to 1 in 10 lottery

So in 30× oversubscribed retail, your odds of getting allotment are ~10-20%. In 60× oversubscribed (Tata Tech IPO, Mamaearth), odds drop to 5-8%.

Tactics that improve odds (marginally)

1. Apply for 1 lot only. Multiple lot applications don’t help in oversubscribed retail; everyone gets 1 lot lottery first. Apply minimum.
2. Use multiple family member PANs. Each PAN-holding family member with a demat can apply separately. Spouse, parents, adult children — each application is independent.
3. HNI category has different math. If you have ₹15-20 L to deploy (with a margin facility), HNI category is proportionate, so 60× oversubscription gives you ~1.6% allotment — but 1.6% of ₹20 L = ₹32K worth of shares vs 0% in retail lottery. The margin cost (3-day funding charge) is the trade-off.

Grey Market Premium (GMP) — what it actually tells you

GMP is the unofficial premium at which IPO shares trade in the grey market (off-exchange, broker-to-broker, pre-listing). A ₹100 share with GMP ₹40 means buyers in grey market are paying ₹140 for shares not yet listed.

GMP is widely reported in financial media as a “listing day prediction” — but it’s a noisy signal:

• GMP is set by a small group of grey-market dealers, not deep liquid markets
• Last-day GMP often differs significantly from listing-day open
• For sub-₹500 Cr IPOs, GMP can be manipulated by a few large applications
• “Investors trading GMP” exposes themselves to counterparty risk in unregulated transactions

Use GMP as one signal among many — not the deciding factor. Subscribe based on company fundamentals, valuation vs peers, and red-flag check on DRHP risk factors.

Listing day strategies

Strategy 1 — Sell at open (most common retail play)

If GMP suggests 30%+ premium, listing-day sell captures that gain quickly. Tax: STCG at 20% (held under 12 months).

Strategy 2 — Hold for 7-30 days

Many IPOs see further upside in the first month, but volatility is high. ~40% of IPOs trade below listing-day open within 30 days.

Strategy 3 — Hold for 12+ months

Reach LTCG (12.5%, with ₹1.25 L exemption). Most IPOs in 2020-2024 cohort that held 12+ months delivered mixed results — some doubled, some are below issue price.

Pure data: 2020-23 IPO cohort one-year returns are roughly 50% positive, 50% flat or negative. So buy IPOs for fundamentals, not for assured listing pop.

How to evaluate an IPO before applying

1. Read the DRHP risk factors (link on SEBI website). Focus on: Are there pending legal cases? Is anchor investor list dominated by quality names? What’s the use of funds — debt repayment vs growth?
2. Check valuation vs listed peers. P/E ratio at issue price compared to current listed comparables. If issue P/E is 80× and peer P/E is 25×, listing at premium is unsustainable.
3. Promoter dilution post-IPO. Promoter selling 30%+ of holding signals diminished commitment. New money for capex via fresh issue is healthier than offer-for-sale.
4. Anchor investor quality. Tier-1 mutual funds (HDFC AMC, ICICI Pru, SBI MF) anchor in good IPOs. Quality of anchors signals institutional conviction.
5. Lock-in expiry calendar. 90-180 day lock-in expiry for pre-IPO investors creates supply pressure. Plan exit before lock-in unlocks.

Tax on IPO investments

Allotment cost basis is the issue price. Sale proceeds minus issue price is capital gain — STCG 20% if held under 12 months, LTCG 12.5% above ₹1.25 L if held 12+ months. See capital gains guide.

Common mistake: forgetting that listing day sale = STCG at 20%, not “no tax because I just got the shares.” Plan tax on listing-day exits.

Linked deep-dives

• Best demat account 2026
• Index Fund vs ETF vs Active Fund
• Capital gains tax
• SIP guide
• CIBIL improvement plan

FAQs

Can I apply for an IPO from multiple bank accounts?

No. Each PAN can apply only once per IPO. Multiple applications from same PAN get rejected.

What’s the minimum amount to apply for IPO?

1 lot. Lot size depends on issue price; typically ₹14,000-₹16,000 to fit within retail category limits.

Is GMP reliable?

Mid-quality signal. Top-quartile GMPs (40%+ premium) generally do see listing-day gains; <20% GMPs are noisier. Use GMP + fundamentals together.

Can NRIs apply for IPOs?

Yes — through NRO/NRE-linked demat. NRI category has separate sub-allocation (typically 5-10% within retail). Apply via your NRI broker.

What happens if I don’t get allotment?

Blocked amount in your bank account is released within 1-2 working days post allotment. No fees for failed applications.

Should I apply for SME IPOs?

SME (Small and Medium Enterprise) IPOs have lower retail thresholds (₹1 L+ minimum) and listing on dedicated exchanges. Generally higher risk, less analyst coverage. Suitable only for experienced investors comfortable with illiquidity.

Sources & references

• SEBI — IPO process and ASBA framework
• NSE / BSE IPO subscription data and listing notes
• SEBI ICDR Regulations 2018 (latest amendments)

Last verified: April 2026. IPO process and category allocations are governed by SEBI ICDR — check current rules before applying.