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Open any IPO's subscription page on IPOBee and you'll see three letters repeated everywhere — QIB, NII, RII. Each one is a separate investor category with its own reservation, its own minimum investment, and its own allotment rules. Understanding them matters because a strong overall subscription number can hide a very different story once you break it down by category.
This guide explains each category from scratch — who belongs in it, how much of the IPO is set aside for it, and why the allotment process is completely different for a retail applicant versus an institutional one.
What Are IPO Investor Categories?
Every book-built IPO in India reserves fixed portions of the total shares on offer for different types of investors, as mandated by SEBI's ICDR regulations. This reservation exists so that no single type of investor — say, large institutions — can corner the entire issue, and so that retail investors get a guaranteed slice regardless of how competitive the bidding gets.
The three main categories are QIB, NII, and RII. Anchor investors, covered in a separate article on anchor investors, are technically a subset that bids out of the QIB portion a day before the issue opens.
QIB — Qualified Institutional Buyer
QIB stands for Qualified Institutional Buyer. This category is reserved exclusively for large, SEBI-recognised institutions — not individuals. It includes:
- Mutual funds (domestic asset management companies)
- Foreign Portfolio Investors (FPIs) and FIIs
- Insurance companies and pension funds
- Scheduled commercial banks and public financial institutions
- Venture capital funds and alternative investment funds registered with SEBI
In most book-built mainboard IPOs, up to 50% of the net offer is reserved for QIBs. There is no fixed minimum bid amount for a regular QIB — bidding is done in large blocks, and allotment within the category is proportionate to the size of each institution's bid.
NII / HNI — Non-Institutional Investor
NII (also commonly called HNI, or High Net-worth Individual) covers any individual, company, trust, or body corporate applying for shares worth more than ₹2 lakh. Unlike QIBs, NIIs don't need any institutional registration — anyone with enough capital to cross the ₹2 lakh threshold falls into this category automatically.
At least 15% of the net offer is typically reserved for NII in a mainboard book-built IPO. Since April 2022, SEBI split this quota further into two sub-categories to give smaller HNIs a fairer shot against very large bidders:
Before this split, a handful of ultra-large HNI bids could dominate the entire NII allotment. Splitting the quota means a ₹5 lakh bidder now competes only against other bidders in the same ₹2L–₹10L band, not against someone bidding ₹50 crore.
RII — Retail Individual Investor
RII covers individual investors — resident Indians, NRIs, and HUFs — applying for shares worth up to ₹2 lakh in a single application. This is the category almost every first-time IPO applicant falls into.
A minimum of 35% of the net offer is reserved for retail investors in most mainboard book-built IPOs. Unlike QIB and NII, retail allotment is not proportionate when the category is oversubscribed — it's decided by a computerised lottery, discussed in more detail in our guide on how IPO allotment works.
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Each category — QIB, NII, RII — is allotted independently, so subscription in one doesn't affect another
QIB vs NII vs RII — Quick Comparison
| Category | Who Can Apply | Investment Range | Typical Reservation | Allotment Basis |
|---|---|---|---|---|
| QIB | Mutual funds, FPIs, banks, insurers | No fixed minimum, large block bids | Up to 50% of net offer | Proportionate |
| NII / HNI | Individuals, trusts, corporates | Above ₹2 lakh | At least 15% of net offer | Proportionate (within bNII/sNII sub-pool) |
| RII | Any individual investor | Up to ₹2 lakh | At least 35% of net offer | Lottery (computerised draw) |
Exact reservation percentages can shift for certain issuer categories — for instance, companies that don't meet SEBI's profitability track record under Regulation 6(2) must allocate a higher minimum share to QIBs. Always check the specific IPO's RHP for the confirmed split rather than assuming the standard 50/15/35 ratio applies.
Why QIB Subscription Matters Most
QIBs run dedicated research desks and typically bid only after studying the company's financials, sector outlook, and valuation relative to peers. Heavy QIB oversubscription is therefore treated as one of the strongest available signals of institutional confidence — much like the way GMP is treated as a grey-market signal, covered in our guide on what GMP means.
Retail subscription, by contrast, can spike purely because a stock is trending on social media or has an eye-catching GMP, without much underlying research. That's exactly why experienced investors watch the QIB number closely — often more closely than the headline "times subscribed" figure.
How Category Reservation Affects Your Allotment Chances
Because each category is allotted independently, oversubscription in one category has no direct effect on another. A retail applicant's odds depend entirely on how many times the retail portion is oversubscribed — not the QIB or NII portion. If the retail category is subscribed 3x, roughly one in three applicants gets allotted a lot through the lottery, regardless of how hot the QIB book is.
This is also why some SME IPOs post huge overall subscription numbers that are almost entirely driven by NII bidding, while the retail category stays only moderately subscribed — worth checking category-wise data before assuming your own odds from the headline figure alone.
Frequently Asked Questions
