Non-Institutional Investor (NII)

A Non-Institutional Investor (NII), commonly referred to as a High Net-Worth Individual (HNI) in market practice, is an investor who applies for shares in a public issue in India for an aggregate bid value exceeding ₹2,00,000 and who does not fall within the definition of a Qualified Institutional Buyer (QIB). The category is implicitly defined in the SEBI (Issue of Capital and Disclosure Requirements) Regulations, 2018 (SEBI ICDR) by exclusion: an investor is an NII if they are neither a Retail Individual Investor (RII) bidding within the ₹2,00,000 ceiling nor a QIB as defined in Regulation 2(zd). In a mainboard Initial Public Offering (IPO) conducted through the book-building route, at least 15 per cent of the net public offer is reserved for NIIs.

In December 2021, SEBI materially reformed the NII category by splitting it into two mandatory sub-buckets: the small NII bucket (also called sNII), for applications between ₹2,00,001 and ₹10,00,000; and the big NII bucket (also called bNII), for applications above ₹10,00,000. Each sub-bucket receives one-third and two-thirds respectively of the total NII allocation. This structural change, introduced by SEBI circular SEBI/HO/CFD/DIL2/CIR/P/2021/2480/1/M dated 16 December 2021, was designed to ensure that applicants with moderate surplus capital were not systematically crowded out by very large institutional-scale non-QIB bids.

Regulatory definition and scope

Unlike the Retail Individual Investor category, which is positively defined by Regulation 2(vv) with a specific rupee ceiling, the NII category operates as the residual non-QIB investor category for applications above the retail threshold. Regulation 2 of SEBI ICDR 2018 defines QIBs and RIIs exhaustively; anyone bidding in a public issue who is neither a QIB nor an RII is, by construction, an NII.

The practical consequence is that the NII category is heterogeneous by design. It encompasses:

• resident individuals bidding above ₹2,00,000;
• Hindu Undivided Families (HUFs) in the name of the karta;
• companies (including private limited companies and public companies);
• partnership firms and limited liability partnerships;
• Non-Resident Indians (NRIs) applying through ASBA regardless of bid value (NRIs applying via the Portfolio Investment Scheme or repatriation basis are typically routed as NIIs);
• family offices and wealth management vehicles that do not qualify as QIBs;
• trusts (other than mutual funds, which qualify as QIBs).

Notably, entities that qualify as QIBs, such as mutual funds , insurance companies, scheduled commercial banks, and Foreign Portfolio Investors (FPIs), are excluded from NII participation even if the entity elects to bid at an amount that would otherwise classify it as an NII. The QIB classification is based on entity type, not bid amount.

The December 2021 sub-category reform

Prior to 16 December 2021, the entire 15 per cent NII allocation was treated as a single undifferentiated pool, with allotment determined on a proportionate basis. This meant that a company or family office bidding ₹500 crore in the NII bucket received a proportionate allotment vastly larger than a retail professional bidding ₹3,00,000 in the same bucket. The very large applications crowded out smaller NII applicants and reduced the effective competition for shares in that band.

SEBI’s December 2021 circular addressed this by mandating the following split of the NII portion for mainboard book-built issues with effect from 1 April 2022:

Within each sub-bucket, allotment is proportionate to the bid amount, subject to a minimum allotment of one lot per valid application. If one sub-bucket is undersubscribed while the other is oversubscribed, the undersubscribed portion is not automatically transferred to the oversubscribed sub-bucket; instead, the unsubscribed portion spills over to the QIB category under the standard spill-over provisions of Regulation 49 of SEBI ICDR 2018.

The small NII sub-bucket is particularly relevant to investors who participate in IPOs as a regular financial activity but do not qualify as QIBs: salaried professionals, small business owners, and family offices with moderate capital. The ₹10,00,000 ceiling for sNII corresponds to ten lots in an issue priced such that one lot costs ₹1,00,000, which covers a wide range of mainboard IPO lot sizes.

Allocation in a mainboard IPO

The minimum allocation to the NII category as a whole is 15 per cent of the net public offer. In a ₹1,000 crore mainboard IPO, at least ₹150 crore of shares must be offered to NIIs, ₹50 crore to sNIIs and ₹100 crore to bNIIs under the one-third/two-thirds split.

The remaining 50 per cent of the net public offer goes to Qualified Institutional Buyers and the 35 per cent goes to Retail Individual Investors . The three categories together account for the full net public offer in a standard mainboard book-built issue. Reservations for employees, existing shareholders, and other reserved-category investors are carved out before computing the net public offer percentages.

For SME IPOs on the BSE SME and NSE Emerge platforms, the allocation rules differ from the mainboard: SEBI mandates that at least 50 per cent of the net public offer be available to the public, with no mandatory QIB/NII/RII split specified in the same way. SME IPOs have their own allotment methodology, and the NII category as defined for mainboard issues does not apply in the same form.

Application mechanism: bank ASBA

NIIs, unlike Retail Individual Investors , cannot use the UPI ASBA route through a broker for applications above ₹5,00,000. For bid values between ₹2,00,001 and ₹5,00,000, UPI ASBA is technically available (since the September 2025 NPCI revision raised the UPI mandate cap to ₹5,00,000), but for most NII applicants, who typically bid well above ₹5,00,000 to improve allotment probability, the mandatory route is bank ASBA via NetBanking .

The bank ASBA flow for NIIs is as follows.

1. The investor logs in to the NetBanking portal of their Self Certified Syndicate Bank (SCSB), a scheduled commercial bank designated by SEBI to accept ASBA applications.
2. The investor navigates to the IPO section, selects the issue, enters the number of lots, and specifies a price within the price band (cut-off pricing is not available to NIIs; they must bid at a specific price).
3. The bank debits, but blocks, not transfers, the application amount from the investor’s savings or current account. The blocked amount cannot be withdrawn until the mandate is released.
4. The bank transmits the bid details to the stock exchange electronically.
5. After the subscription period closes, the registrar finalises the basis of allotment and instructs the SCSBs on the final debit/unblock instructions.

NIIs who apply through Non-Banking Financial Company (NBFC) intermediaries that are not SCSBs can still submit bids, but those bids must ultimately be routed through an SCSB; the NBFC acts as an aggregator and collector of applications rather than as an independent ASBA facility provider.

Allotment rules when the NII category is oversubscribed

The allotment methodology for NIIs differs fundamentally from the lottery used for the RII category. For NIIs, allotment is proportionate to bid amount, subject to a minimum allotment of one lot per valid application.

Proportionate allotment. If the NII sub-bucket is oversubscribed, each valid application receives shares in proportion to the total amount bid relative to the total shares available. For example, if a sub-bucket is subscribed 50 times and an investor bid for 50 lots, proportionate allotment yields one lot (50 lots divided by 50x oversubscription), which coincidentally equals the minimum one-lot guarantee.

Minimum one-lot guarantee. Every valid NII application that can receive at least one lot will receive at least one lot, regardless of the oversubscription multiple. This guarantee is applied before the proportionate allotment is computed: the registrar first ensures there are enough lots to give each valid application one lot, and if there are not (i.e., the number of valid applications exceeds the number of available lots), the registrar resorts to a computerised lottery among valid applications for one-lot allotments, similar in structure to the RII lottery, though less commonly triggered in NII buckets because of the higher minimum bid amount.

Cut-off price not available. NIIs must bid at a specific price within the price band. If the final issue price is set above the price bid by an NII, that bid is treated as invalid and receives no allotment. NIIs therefore bear pricing risk that RIIs (who can opt for cut-off pricing) do not.

Financing through IPO loans. A substantial proportion of bNII applications in popular mainboard IPOs are funded through short-term overdraft facilities or IPO financing loans offered by banks and NBFCs. These loans enable entities to bid for very large amounts, sometimes several hundred crore rupees, in the NII bucket on borrowed capital, with the sole objective of receiving the proportionate allotment on a small equity investment. The practice amplifies NII oversubscription ratios, sometimes to several hundred times, in well-regarded issues. SEBI has periodically examined this practice; the December 2021 sNII/bNII split was partly motivated by a desire to limit the distortive effect of large leveraged bids on the small NII sub-bucket.

The NII-versus-QIB boundary

A recurring question in the market is why certain institutional entities apply as NIIs rather than QIBs. The answer lies in the SEBI ICDR definition of QIBs (Regulation 2(zd)), which is an exhaustive list of entity types. An entity that does not fit any item on that list, for example, a registered Alternative Investment Fund (AIF) Category III that is not specifically listed, or a large corporate treasury, is not eligible to participate as a QIB and must therefore apply as an NII if its bid exceeds the retail threshold.

The practical implication is that some very large applications in the NII bucket are not from individuals or families at all, but from corporate entities that do not meet the QIB classification. This corporate NII participation is concentrated in the bNII sub-bucket and tends to be the vehicle through which IPO financing loans are deployed.

Common issues and edge cases

PAN and demat requirements. Like RIIs, NII applicants must provide a valid PAN and have a linked demat account. A single PAN cannot submit more than one application in the same investor category in the same issue.

Price band revision. If the issuer revises the price band after the subscription period opens (a practice permitted by SEBI within specified limits), NII applicants who bid at a price below the revised lower end of the new band must revise their bids or their applications will be rejected.

Blocking failure. In bank ASBA applications, if the SCSB’s system is unable to block the specified amount, typically because the account balance is insufficient, the application is rejected at the bank level before it reaches the exchange. Unlike UPI ASBA (where the investor is notified of mandate failure in real time through their UPI app), bank ASBA blocking failures may not be immediately visible to the applicant.

Multiple demat accounts and joint accounts. An NII can apply from only one PAN per issue. Joint demat accounts are treated using the first holder’s PAN. An individual who holds both a sole demat account and a joint demat account (as first holder) can technically submit two applications, one from each account, but SEBI’s reconciliation systems treat both applications from the same PAN as duplicates and reject both.

Historical context and regulatory development

The NII category has existed in the Indian IPO framework since the introduction of book building as a mainstream mechanism in the late 1990s. The SEBI (Disclosure and Investor Protection) Guidelines, 2000 codified the three-category structure (RII, NII, QIB) with the 35/15/50 split that persists today. The categorical definitions and proportions have remained stable across the 2009 and 2018 revisions of the ICDR regulations, though the operational mechanics, ASBA, UPI, T+3 listing, have changed substantially.

The December 2021 sNII/bNII bifurcation was the most significant structural change to the NII category since its inception. Before 2022, the 15 per cent NII pool was entirely proportionate, and a bid of ₹500 crore received 5,000 times the allotment of a ₹10,00,000 bid, all else equal. Post-2022, the ₹10,00,000 ceiling for sNII creates a protected sub-bucket within which smaller NII applicants compete only against other similarly sized applicants.

See also

• Retail Individual Investor
• Qualified Institutional Buyer
• Non-Resident Indian
• Initial Public Offering
• Basis of allotment
• Book building
• ASBA
• UPI ASBA
• Self Certified Syndicate Bank

References

1. Securities and Exchange Board of India. SEBI (Issue of Capital and Disclosure Requirements) Regulations, 2018, Regulations 2(vv), 2(zd), Schedule XIII. Gazette of India, 11 September 2018. Available at sebi.gov.in.
2. Securities and Exchange Board of India. Circular SEBI/HO/CFD/DIL2/CIR/P/2021/2480/1/M, 16 December 2021, Revision of NII investor category, introduction of small NII and big NII sub-categories, effective 1 April 2022.
3. Securities and Exchange Board of India. Circular CIR/CFD/POLICYCELL/11/2015, 10 November 2015, ASBA as sole payment mode in public issues.
4. Securities and Exchange Board of India. SEBI (Disclosure and Investor Protection) Guidelines, 2000 and the 2009 ICDR Regulations (history of the three-category structure).
5. National Payments Corporation of India. UPI Circular on revised mandate limit for capital-market transactions, September 2025.
6. Securities and Exchange Board of India. Circular SEBI/HO/CFD/TPD1/CIR/P/2023/140, 9 August 2023, T+3 listing timeline for mainboard public issues.