How to Apply for an IPO in India 2026: ASBA, UPI Mandate & Allotment Process Explained

By Nitish Bharadwaj · Published Aug 10, 2026 · 7 min

IPO applications in India go through ASBA, which blocks your bid amount in your own bank account instead of debiting it upfront. Retail investors bidding up to ₹2 lakh apply via a UPI mandate that has to be approved before the exchange's 5 PM cutoff on closing day, though brokers often set an earlier internal deadline. SEBI's T+3 rule means listing happens three working days after the issue closes, with allotment finalised and funds unblocked in between. Always bid at cut-off price to avoid losing out to the final issue price.

Every IPO application in India — mainboard or SME — runs through ASBA, and for most retail investors that now means approving a UPI mandate inside a tight window most people discover only after missing it. There's no rejection email that explains why; the bid simply never reaches the exchange. Here's the process end to end, and where retail applications actually fail.

ASBA — Your Money Never Leaves Your Account Until Allotment

ASBA — Application Supported by Blocked Amount — has been mandatory for every IPO application in India since 2016. Instead of debiting your bid amount when you apply, your bank blocks (earmarks) that amount in your own savings account. The money stays yours, keeps earning whatever interest your account normally earns, and is only debited if you're actually allotted shares. If you get a partial or no allotment, the unused portion is unblocked automatically — there's no refund process to chase, because the money never left your account in the first place. This is the biggest difference from how IPO applications worked before 2016, when investors physically transferred funds and waited for a refund cheque or NEFT credit. You'll need an active demat account with a linked UPI ID before you can apply.

The UPI Mandate: What Actually Happens When You Apply

1. Open your broker or bank's IPO section during the bidding window and enter the number of lots and price — or select 'cut-off price'
2. Enter your UPI ID, linked to the bank account you want funds blocked in, and submit the bid
3. Your broker uploads the bid to the stock exchange, which triggers a mandate request sent to your UPI app — GPay, PhonePe, BHIM, or your bank's own app
4. Open the notification in your UPI app and approve the mandate — this blocks the bid amount in your account; it does not debit it
5. If you don't approve the mandate before the cutoff, the bid is treated as invalid and dropped, even though you technically "applied"

Always Bid at Cut-Off Price if You're a Retail Investor

Retail investors — bids up to ₹2 lakh, the cap that defines the retail category — get the option to bid at 'cut-off price' instead of a fixed number within the band. This means agreeing to pay whatever the final issue price turns out to be, within the band. Bidding at a fixed price below the eventual cut-off gets your entire application rejected or ranked lower in an oversubscribed issue — there's no partial benefit to bidding low. Unless you have a specific reason to cap your price, selecting cut-off price is the safer default for retail bids.

From Closing to Listing: The T+3 Timeline

SEBI cut the listing timeline from T+6 to T+3 days for all issues opening on or after December 1, 2023, so the full cycle — from the day bidding closes to the day the stock starts trading — now takes three working days, not six. If T+3 falls on a weekend or a stock exchange holiday, listing simply moves to the next working day; SEBI's timeline counts only working days.

Retail Quota and How Allotment Actually Works

In a book-built mainboard IPO, SEBI rules typically reserve at least 35% of the issue for retail individual investors, alongside separate quotas for qualified institutional buyers and non-institutional investors — the exact split varies by issue category and can differ for SME IPOs. When the retail portion is oversubscribed, allotment isn't proportional; it runs through a computerised lottery designed to give as many applicants as possible at least one lot, rather than giving everyone a fractional allocation. This is why a heavily oversubscribed IPO can reject a retail applicant entirely even though they bid the minimum lot size — the lottery, not the bid amount, decides who gets in.

Common Mistakes That Get Retail Applications Rejected

• Approving the UPI mandate after the broker's internal cutoff, even though the exchange's official cutoff hasn't passed
• Bidding at a fixed price instead of cut-off price, and getting outbid when the final price lands higher
• Applying from multiple accounts linked to the same PAN — this is treated as a single investor and can get all but one application rejected (see our multiple demat accounts guide for when holding more than one account actually helps and when it doesn't)
• Letting the UPI mandate notification sit unopened in the banking app instead of approving it immediately
• Not checking whether the linked bank account has enough balance to cover the full bid amount — insufficient funds cause the mandate approval itself to fail

Grey Market Premium — A Signal, Not a Guarantee

The grey market premium (GMP) is an unofficial, unregulated indicator of what an IPO might list at, traded informally outside any exchange. It's widely quoted in financial media and IPO tracking apps, but it isn't backed by SEBI, isn't based on audited data, and has been wrong on plenty of high-profile listings. Treat it as one data point at most, never as a reason to skip reading the prospectus. If you'd rather not track individual IPOs, Smallcase portfolios and a well-chosen mutual fund remain the lower-effort alternative — and the same track-record-over-hype logic applies when deciding whether to invest in a new fund offer.