Published Sep 10, 2026 4 Min Read

Introduction

Allocation is the process of distributing shares to investors during a public offering, such as an Initial Public Offering (IPO), Follow-on Public Offer (FPO), or Rights Issue. It determines how many shares each eligible investor receives based on factors such as subscription demand, investor category and the rules of the issue.

When an issue is oversubscribed, investors might not receive all the shares they applied for. The available shares are then allotted according to the prescribed process for each investor category. This can include proportionate allocation or lottery-based allocation, depending on the issue and category. Understanding how allocation works helps you understand why you might receive fewer shares than requested, how oversubscription is handled and how the final investment amount is determined.

In summary

IPO allocation determines how available shares are distributed among eligible investors. The allotment process depends on factors such as investor category, subscription demand and the rules applicable to the issue. The following points summarise the key aspects of IPO allocation:


  • Allocation determines how shares are distributed among investors during an IPO.
  • It becomes important when demand exceeds the number of available shares.
  • The process follows the prescribed rules for different investor categories.
  • Oversubscribed issues can result in partial or no share allotment.
  • Allocation depends on factors such as subscription levels and the applicable allotment method.
  • Understanding allocation helps you set realistic expectations when applying for an IPO.
  • The process supports an orderly distribution of shares in the capital market.

What is allocation?

Allocation is the process of distributing shares to investors during a public issue, such as an Initial Public Offering (IPO), Follow-on Public Offer (FPO), or Rights Issue. It determines how many shares each applicant receives based on factors such as subscription demand, investor category and the prescribed allotment rules.

When a public issue receives more applications than the number of shares available, it is called oversubscription. In such cases, shares are allotted according to the prescribed process for each investor category. This ensures that the available shares are distributed in a fair and transparent manner while following applicable regulations.

How allocation works?

The IPO allocation process determines how shares are distributed among eligible investors based on the bids received, investor category and the applicable allotment rules. The process generally works as follows:


  • Investors submit bids stating the number of shares they want to apply for and the bid price during the IPO application process.
  • The total demand is calculated based on the valid bids received across different investor categories.
  • If the IPO is undersubscribed, shares can be allotted to valid applicants based on their bids and the terms of the issue.
  • In an oversubscribed IPO, shares are allotted according to the prescribed rules for each investor category. Retail investors can receive shares through a lottery when valid applications exceed the available lots, while institutional investors follow different allotment mechanisms.
  • Regulatory guidelines govern the distribution of shares across retail, institutional and other investor categories.
  • A lottery can be used to determine allotment among eligible retail investors when demand exceeds the available shares.
  • The final allocation determines the number of shares allotted to each investor before the allotment is confirmed.

Common types of allocation

Allocation refers to distributing available resources, money or assets across different areas based on specific objectives. The term can apply to business planning, financial management and investment decisions.

  • Resource allocation: Assigns available resources to projects, activities or business functions based on their requirements and priorities.
  • Capital allocation: Distributes financial capital among investments, projects or business activities to support growth and financial objectives.
  • Asset allocation: Divides an investment portfolio across asset classes such as equities, bonds and other assets based on an investor’s goals and risk tolerance.
  • Budget allocation: Assigns a defined amount of money to different departments, projects or expenses within an available budget.
  • Time allocation: Distributes available time among tasks or activities to support planning, productivity and operational efficiency.

Understanding these types of allocation can help individuals and organisations manage limited resources based on their specific objectives.

Importance for investors

Allocation determines how shares are distributed among eligible investors, particularly when an IPO is oversubscribed. Understanding the process helps you know how demand, investor categories and allotment rules affect the number of shares you receive.

  • Ensures fair distribution of shares among eligible investors, especially in oversubscribed IPOs.
  • Helps maintain transparency through regulated allotment mechanisms.
  • Allows you to understand the factors that affect your chances of receiving shares.
  • Supports informed decision-making when applying for IPOs.
  • Helps distribute shares across different investor categories according to the prescribed rules.
  • Supports retail investor participation through category-specific allotment rules.
  • Provides clarity on how your bid translates into the number of shares allotted to you.

Allocation is important because it directly affects the number of shares you receive from a public issue and the amount invested in those shares.

Example of allocation

Consider a company launching an IPO with 1,00,000 shares available for subscription. Suppose investors collectively apply for 5,00,000 shares, making the issue oversubscribed by five times. In this case, the allocation process determines how the available shares are distributed among eligible applicants.

If the retail category receives applications for 2,00,000 shares against an allocation of 50,000 shares, investors cannot receive all the shares they applied for. The allotment method depends on the prescribed rules for the issue. For retail investors, a computerised lottery can be used when the number of valid applications exceeds the number of available lots. An investor can therefore receive one lot or no shares.

This example shows how allocation manages excess demand and distributes available shares according to the prescribed guidelines and regulatory requirements.


How is IPO allocation calculated?

IPO allocation is based on factors such as the total number of shares offered, investor category, subscription level and the applicable allotment rules. Investor categories include Retail Individual Investors (RIIs), Qualified Institutional Buyers (QIBs) and Non-Institutional Investors (NIIs).

For an oversubscribed IPO, the allotment method differs by investor category. Retail investors can receive shares through a computerised lottery when valid applications exceed the available lots. QIBs and NIIs follow their respective allotment mechanisms under the applicable rules.

The allocation process determines the number of shares allotted to each eligible applicant. It follows the prescribed regulatory framework and the terms of the IPO.

Allocation methods

Allocation methods determine how available shares are distributed among eligible investors. The method used depends on the type of public issue, investor category and the applicable allotment rules.

  • Proportional allocation: Shares are distributed in proportion to the number of shares applied for by eligible investors.
  • Lottery method: A computerised lottery can be used for retail investors when valid applications exceed the available lots.
  • Priority allocation: Certain investor categories can receive preference when the applicable regulations or issue terms provide for it.
  • Fixed allocation: A specified number or proportion of shares is reserved for different investor categories according to the issue terms and regulatory requirements.

Conclusion

IPO allocation is a key part of the IPO process, as it determines how shares are distributed among investors. It becomes particularly important when an issue is oversubscribed, as the available shares must be allocated among eligible applicants based on the prescribed rules.

Understanding IPO allocation can help you know how applications are processed and why you might receive fewer shares than applied for in an oversubscribed issue. It also helps you set realistic expectations when applying for an IPO.

Overall, IPO allocation supports an organised process for distributing shares among investors. Understanding how allocation works can help you make more informed investment decisions.

Frequently asked questions

Is allocation the same as allotment?

Although related, allocation refers to distributing securities based on demand, whereas allotment refers to the finalized assignment of shares to investors.

Yes, allocations can be revised before final allotment based on changes in demand or regulatory requirements, ensuring better alignment with subscription ratios.

A higher bid can improve allocation chances during competitive IPO bidding, but the process also considers regulatory limits on asset distribution.

A sensible equity allocation for a first-time investor may be around 60% to 80% of the investment portfolio, provided the money is intended for long-term goals and the investor can tolerate market fluctuations.

A salaried professional may consider allocating around 50% to 75% of their investable portfolio to equities, depending on age, income stability and risk tolerance. Diversification across asset classes can help manage portfolio volatility.

A college student may consider allocating around 70% to 90% of their investable portfolio to equities if the money is meant for long-term goals. A longer investment horizon can provide more time to manage market fluctuations.

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