IPO Allotment Chance Calculator

Estimate your odds of getting an allotment based on subscription.

How the IPO Allotment Chance Calculator works

For oversubscribed mainboard IPOs, retail allotment is done by lottery, with one lot per winning application. Your approximate chance per application is 1 ÷ retail subscription. Applying from more family PAN accounts improves the chance that at least one gets allotted.

IPO Allotment Chance Calculator formula

Chance per application ≈ 1 ÷ Subscription (×) · Chance of ≥1 allotment = 1 − (1 − p)ⁿ

Results are estimates for illustration only and not financial advice.

How to use the IPO Allotment Chance Calculator

Enter the retail subscription figure (for example 45 times) once bidding closes.
Enter how many separate PAN applications your family made.
See the chance of each application and of at least one allotment.

Need live numbers? Check IPO GMP today, current IPOs or the IPO allotment guide.

IPO Allotment Chance Calculator: FAQs

Does applying for more lots help retail investors?

In an oversubscribed mainboard IPO, no — each retail application is treated as one entry in the lottery for a single lot.

Is the IPO Allotment Chance Calculator free to use?

Yes. The IPO Allotment Chance Calculator on IPO Darbaar is free, needs no sign-up and works on mobile and desktop.

Is my data saved anywhere?

No. All calculations run in your browser; the numbers you enter are not sent to or stored on our servers.

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