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What the three IPO categories actually mean
Retail individual investor (RII)
An RII is an eligible individual applicant who satisfies the retail rules applicable to that issue. “Retail” is a regulatory classification, not simply a synonym for a small investor or a person with limited wealth. The live regulation and the issue’s offer document determine the relevant application-value threshold, bid-lot treatment and any subcategories. Because those terms can change, do not rely on a single universal cutoff quoted in an old article.
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The RII bucket is normally part of the net public offer. Shares are set aside for the category under the allocation rules, and an applicant bids through the process specified for that issue. Being eligible for the RII category does not mean that shares will be allotted.
Non-institutional investor (NII)
Under SEBI’s ICDR framework, an NII is an investor other than a retail individual investor and a qualified institutional buyer. That definition makes NII a residual regulatory category. It can include individuals whose bids do not qualify as retail and other eligible non-institutional applicants; it is inaccurate to describe the category as only “wealthy individuals.”
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The issue document determines how the NII portion is divided, what bid sizes are permitted and which procedural requirements apply. An NII application is not automatically a shareholder application, and a shareholder’s eligibility for a reserved portion does not by itself change the definition of NII.
Shareholder reservation
A shareholder reservation is a separate, conditional reservation that exists only when the issuer and the legal structure of the offer create it. SEBI rules describe circumstances involving specified shareholders, such as shareholders other than promoters of listed promoting companies or listed subsidiaries. SEBI also permits a listed company to make a competitive reservation for retail individual shareholders in the circumstances set out in the regulations.
The prospectus must state the record date or other eligibility test, the class of shares or relationship required, the number of shares reserved and how an eligible person applies. A shareholder reservation is not a rights issue: it does not offer existing holders a right to buy new shares in proportion to their holdings. It is a competitive IPO allocation bucket, subject to the offer terms and available shares.
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How the categories differ at a glance
| Question | RII | NII | Shareholder reservation |
|---|---|---|---|
| Who qualifies? | Eligible individual applicants meeting the issue’s retail conditions. | An investor other than an RII or QIB; not limited to high-wealth individuals. | Only the specified shareholders who satisfy the prospectus conditions. |
| What is it? | A net-offer investor category. | A net-offer investor category. | A reserved portion created by particular offer terms; it may sit alongside the normal categories. |
| Is it present in every IPO? | Retail treatment is governed by the issue structure and applicable rules. | NII treatment is governed by the issue structure and applicable rules. | No. It is conditional and issue-specific. |
| How is eligibility confirmed? | Check the current rules and the bid-value, lot and applicant conditions in the offer document. | Check that the bid and applicant do not fall within the RII or QIB category and meet the issue’s terms. | Check the stated shareholding relationship, record-date or holding requirement and documentary or application conditions. |
| Does the label guarantee allotment? | No. | No. | No. |
| Funding route | ASBA or the permitted UPI process, subject to current operational rules. | The application method specified for that issue and applicant category. | The method specified in the reservation instructions, often using the applicable ASBA or UPI workflow. |
Allocation percentages depend on the issue structure
There is no single percentage split that can be copied into every IPO. SEBI’s ICDR Regulation 43 describes an ordinary book-building pattern in which not less than 35% of the net offer is allocated to RIIs, not less than 15% to NIIs and not more than 50% to QIBs. The regulation also contains exceptions for specified issue routes, including situations in which a higher QIB allocation applies.
SEBI’s Investor FAQ describes other structures separately. In the compulsory book-built case explained there, the FAQ states at least 75% for QIBs, a maximum of 15% for NIIs and a maximum of 10% for RIIs. For a fixed-price issue, the FAQ describes an initial minimum of 50% for RIIs. These figures are not interchangeable with the ordinary book-building pattern.
| Issue description in SEBI material | RII treatment | NII treatment | QIB treatment | How to use the figures |
|---|---|---|---|---|
| Ordinary book-building pattern under Regulation 43 | Not less than 35% of the net offer | Not less than 15% of the net offer | Not more than 50% | Subject to the regulation’s exceptions and the specific offer document. |
| Compulsory book-built issue described in SEBI’s Investor FAQ (2025) | Maximum 10% | Maximum 15% | At least 75% | A separate issue-structure explanation, not the generic split. |
| Fixed-price issue described in SEBI’s Investor FAQ (2025) | Initial minimum 50% | Not stated in that summary | Not stated in that summary | Read the issue document for the complete allocation structure. |
“Net offer” means the portion to which the relevant allocation rule applies after the exclusions and reservations specified by the regulations and offer document. A shareholder reservation, employee reservation or other permitted reservation can affect the shares available in the remaining buckets. Never infer the live percentages from a headline summary; read the allocation table in the prospectus.
How allotment works when a category is oversubscribed
SEBI’s Investor FAQ says there is no discretion in the allotment process: “It is to be noted that there is no discretion in the allotment process.” The registrar applies the prescribed rules to valid applications within each category rather than choosing applicants subjectively.
For retail and NII applicants, SEBI explains that allotments are not to be less than the minimum bid lot, subject to availability in the category. If shares remain after those minimum-lot requirements, the balance is allotted proportionately under the applicable formula. When demand exceeds the shares available, a valid application can therefore receive no shares even though it satisfied every eligibility and payment condition.
- Category availability comes first: the number of shares assigned to that bucket limits possible allotments.
- Validity matters: rejected, duplicate, incorrectly funded or otherwise non-compliant applications do not enter the normal allotment calculation.
- Minimum lot is conditional: the rule does not promise every applicant one lot when the category is heavily oversubscribed.
- Proportionate treatment is not a return forecast: it describes allocation mechanics, not the likelihood of profit after listing.
ASBA and UPI: what happens to your money
Under ASBA (Application Supported by Blocked Amount), the application amount is blocked in the bank account rather than sent to an escrow account. If shares are allotted, the amount needed for those shares is debited. If there is no allotment, the blocked amount is unblocked; it is not a refund sent back from an escrow account.
SEBI’s UPI guidance describes a similar sequence for eligible applications:
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- Enter the bid details and UPI ID through an intermediary permitted for the issue.
- Receive the block request in the UPI application linked to the relevant bank account.
- Authorise the block before the issue’s stated deadline and check that the mandate shows the correct amount.
- After allotment, the amount for allotted shares is debited and excess funds are unblocked.
SEBI’s investor guidance states a ₹5 lakh per-transaction IPO application limit on UPI for a retail individual investor. It also states that a third-party UPI ID or third-party bank account will not be considered for allocation. Bank, app and UPI-handle eligibility lists and operating limits can change, so confirm the current approved details in the live instructions before applying. An NII or shareholder application may have different permitted channels or limits; the offer document controls.
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- Open the latest prospectus or offer document. Use the document for the specific issue, not a generic explanation of IPO categories.
- Locate the “Basis of Allocation” and “Who can apply” sections. Record the category names, minimum lot, bid-size thresholds, reserved portions and application deadlines.
- Test retail eligibility. Confirm that you are an eligible individual and that the proposed bid meets the current retail-value and lot conditions stated for the issue.
- Test shareholder eligibility separately. Check the required company relationship, record date, number or type of shares and any proof or demat-account condition. Holding shares does not create eligibility unless the offer terms say it does.
- Use NII only when the rules place the bid there. Do not select NII merely because you believe it is for affluent applicants, and do not select a shareholder reservation as a substitute for the normal category.
- Match the funding account to the applicant. Ensure the bank account and, where applicable, the UPI ID belong to the applicant named in the form and meet the current intermediary requirements.
- Save the application and mandate details. The bid quantity, price or cut-off choice, category and UPI mandate should agree before authorisation.
Common misconceptions that cause rejected or misclassified applications
“NII means rich individual investor.”
Not necessarily. NII is defined by exclusions: the investor is neither a retail individual investor nor a QIB. The category can include different eligible applicant types permitted by the issue rules.
“Every IPO has a shareholder quota.”
No. A shareholder reservation appears only when the issuer’s structure and disclosures create it. The prospectus controls the relationship, record date and other tests.
“A shareholder reservation is a rights issue.”
No. A rights issue is a separate corporate-action mechanism. A shareholder reservation is a competitive reservation within an IPO and is subject to availability and allotment rules.
“The largest category gives the best chance of profit or allotment.”
Allocation buckets do not measure investment quality, listing performance or expected return. Oversubscription, valid demand and the number of shares available determine outcomes; the official material does not establish a universal advantage for one category.
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With ASBA or the described UPI process, the amount is normally blocked until the allocation outcome. Only the amount for allotted shares is debited, while excess or fully unused blocked funds are unblocked according to the process.
Worked examples of the classification logic
An individual within the stated retail conditions
If the offer document says an individual bid of a particular size and lot qualifies as retail, that applicant uses the RII category and the retail application workflow. The applicant still faces the category’s available-share limit and may receive no allotment in an oversubscribed issue.
An individual whose bid exceeds the retail boundary
If the same person proposes a bid that the offer document places outside retail, the application is handled under the permitted NII rules rather than being treated as retail simply because the applicant is an individual. The exact threshold must come from the live document.
An existing shareholder where a reservation is offered
If the prospectus creates a reservation for a defined shareholder group and the applicant meets its record-date and holding conditions, the applicant may apply in that reserved portion using the stated form and funding route. The reservation remains competitive; it does not guarantee a minimum allotment or bypass the document’s validation rules.
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- Read the current issue prospectus, including the allocation table and category definitions.
- Confirm whether the issue is book-built or fixed-price and use the corresponding allocation rules.
- Check the current retail threshold and minimum bid lot; do not copy a historical number.
- For NII, verify that the application is outside RII and QIB definitions and otherwise permitted.
- For a shareholder reservation, verify the exact company relationship, record date, holding requirement and proof.
- Use an applicant-owned bank account and, where required, an applicant-owned UPI ID.
- Authorise the ASBA or UPI block before the stated cut-off and monitor the mandate status.
- After the basis of allotment, check the debit for allotted shares and the release of excess blocked funds.
Why the offer document is the practical authority
SEBI regulations establish the framework, but an IPO’s prospectus translates that framework into the issue’s actual categories, reservations, lot sizes, deadlines and application instructions. Regulations and UPI operating arrangements can be amended, and an issuer may use an issue route with different allocation exceptions. Treat the category name as a starting point, then verify every operative condition in the latest document and current SEBI or intermediary guidance.
The useful distinction is therefore functional: RII and NII are investor buckets used for the net-offer allocation, while a shareholder reservation is an optional, issue-specific reserved portion. Category membership controls which rules are applied to an application; it does not predict returns, guarantee shares or replace the need to read the live terms.
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