IPO application checklist: 18 rules that decide whether your bid survives

Most IPO applications don't fail because the investor picked a bad company. They fail because a UPI mandate sat unapproved at 5:01 PM, or because two applications went in under the same PAN, or because someone bid at the lower end of the price band in an issue that got subscribed 40 times.

None of that is bad luck. All of it is avoidable in about ninety seconds of checking before you hit submit.

Here is the checklist, grouped the way you'd actually work through it.

Before you apply: get the account plumbing right

Your PAN must be identical in the bank account and the demat account you're applying from. A mismatch, even a spelling difference carried over from an old KYC, is enough for the registrar to knock the application out at the verification stage.

The demat account also has to be active. Accounts go dormant when there's been no activity for a long stretch, and a frozen or inactive account means the shares have nowhere to go even if you get allotment. Check the status with your broker before the issue opens, not on the closing afternoon.

The UPI mandate is where most applications die

Approve the mandate by 5:00 PM on the closing day. Not 5:01. The application is rejected with no exceptions, and there is no appeal to the registrar afterwards.

If the mandate request hasn't landed in your UPI app within an hour or two of submitting, don't sit and wait for it. Cancel the application and reapply through net banking ASBA. Zerodha's own guidance is to delete and resubmit if the mandate request doesn't arrive within an hour, because mandate delivery through NPCI isn't real time and can take anywhere from a few minutes to several hours.

Don't use the same UPI ID across different demat accounts. If you're applying for yourself, your spouse and your father, each application needs the UPI ID linked to that person's own bank account, and that bank account has to match that person's PAN and demat. Recycling one UPI ID across the set is a reliable way to get the whole lot rejected.

Net banking ASBA is the safer route in general, and it's mandatory anyway for applications above ₹5 lakh. The UPI route caps out at ₹5 lakh per application. ASBA takes two more minutes and removes the mandate from the equation entirely.

One PAN, one application. This one has no workaround

You get one application per PAN per IPO. Two applications from the same demat account, or two applications from different demat accounts that share a PAN, and both get rejected. Different brokers doesn't help either, since the registrar deduplicates on PAN, not on broker code.

What does work is applying through separate PANs in the family. Spouse, parents, adult children, each with their own demat and bank account, each bidding once. In an oversubscribed issue where retail allotment runs on a lottery at one lot per winner, five family applications give you five entries instead of one.

Two account types people forget:

• A HUF has its own PAN and can open its own demat. If the HUF bid stays at ₹2 lakh or below, it sits in the retail category like any other applicant.
• A minor can hold a demat account operated by a guardian, with the minor's own PAN. That's another valid, separate application.

Pick one category and stay in it

Applying in both retail and HNI with the same PAN gets both rejected. Same logic as above.

The one real exception is a reserved quota. If the company has carved out a shareholder quota (you hold shares in the parent company on the record date) or an employee quota, you can bid in that reserved portion alongside your main application. The RHP will spell out who qualifies and what the cap is. Read that section rather than assuming.

Price band: cut-off is a retail-only privilege

In the retail category, always select cut-off price. It means you accept whatever final price the book discovers, and it keeps you in the running no matter where the price settles. Bidding at the lower band gets you excluded the moment the issue is priced above it, which is what happens in nearly every subscribed IPO.

There's no upside to a lower-band bid even in an undersubscribed issue. If the price is discovered at the upper band, your bid is simply out.

In the HNI/NII category you don't have the choice. The cut-off option is available only to retail investors, and NII bidders must enter a specific price inside the band. Enter the upper band price there.

You can back out of a retail bid. You cannot back out of an HNI bid

Retail applicants can revise or withdraw a bid any time before the issue closes. Useful if the grey market cools off on day two, or if you need the blocked funds back.

NII bids can't be withdrawn or reduced once they're registered with the exchange. You can only revise upward. So a ₹4 lakh HNI application means ₹4 lakh is blocked in your account until allotment is finalised, whatever happens to sentiment in the meantime. Decide the amount before you apply, not after.

Timing: the last hour is the worst hour

The exchange window runs 10:00 AM to 5:00 PM on each of the three bidding days. But banks and brokers set their own earlier cut-offs on the final day, often somewhere between 2:00 PM and 4:30 PM, so they can push everything to the exchange in time.

On top of that, mandate volumes spike on closing afternoon and NPCI systems slow down. Server lag, a delayed mandate, an app that won't refresh, and your window is gone.

Apply on day one or day two. If you must apply on the closing day, do it before lunch and approve the mandate immediately.

The short version

Copy this and run through it before you submit:

1. PAN matches across bank and demat
2. Demat account is active
3. One application per PAN, across all brokers
4. Family applications use separate PANs, separate bank accounts, separate UPI IDs
5. HUF and minor accounts count as separate applications
6. One category only, unless there's a shareholder or employee quota
7. Cut-off price in retail, upper band price in HNI
8. Applications above ₹5 lakh go through net banking ASBA
9. Mandate approved well before 5:00 PM on closing day
10. No mandate in an hour or two? Cancel, reapply through ASBA
11. Apply on day one or two, not in the last hour
12. Enough balance in the account for the full blocked amount

Frequently asked questions

Can I apply twice in the same IPO from two different brokers? No. Deduplication happens on PAN at the registrar's end. Both applications get rejected, even though both brokers accepted them.

Does applying for more lots improve my chances in retail? No. In an oversubscribed mainboard IPO, retail allotment is a lottery at one lot per successful applicant. Five lots and one lot carry the same odds. The only difference is how much money stays blocked.

What happens if I don't approve the UPI mandate? The application lapses. No funds are blocked and no bid reaches the exchange. Check the mandates or autopay section of your UPI app manually, since the push notification often gets missed.

Is money debited when I apply? No. Under ASBA the amount is blocked in your own savings account and keeps earning interest. It's debited only to the extent of shares actually allotted, and the rest is released after allotment is finalised.

Can an NRI apply? Yes, through an NRE or NRO account with ASBA, on a non-repatriable or repatriable basis depending on the account. The one-PAN rule applies the same way.

Next IPO you look at, open the RHP and check the shareholder and employee quota sections first. That's the one place where a second legitimate application is available to you, and most retail investors never look.