What Is Issue Size in an IPO?
Issue size is the total value of securities offered in a public issue, worked out as the number of shares offered multiplied by the price. How much of it reaches the company is a separate question, because an offer for sale pays the selling shareholders instead. Behind the figure sits a rule setting the smallest proportion a company must offer, and that rule was rewritten on 13 March 2026.
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The short version
- The figure = shares offered × price per share, covering fresh issue and offer for sale together
- Only the fresh issue part reaches the company; an offer for sale pays the selling shareholders
- The minimum public offer is set by Rule 19(2)(b) of the Securities Contracts (Regulation) Rules, 1957
- Those bands were replaced by G.S.R. 184(E) dated 13 March 2026
- For a company at ₹2,00,000 crore of post-issue capital, the minimum fell from about ₹10,000 crore to ₹6,250 crore
- The figure is not market capitalisation, and the two are often confused
What is issue size
Issue size is the total value of securities a company offers in a public issue. Multiply the shares on offer by the price per share and the result is the figure. Where a price band applies, the prospectus states both ends, so the final number is fixed only after pricing.
A company offering 10 crore shares at ₹120 has an issue size of ₹1,200 crore. Offer the same 10 crore shares in a band of ₹114 to ₹120 and the prospectus will show ₹1,140 crore to ₹1,200 crore.
The term covers debt as well. A bond or debenture issue has an issue size in the same sense: the face value multiplied by the number of instruments offered. Most searches for the phrase are about share issues, and that is what the rest of this page covers.
Fresh issue and offer for sale are both counted
Two components make up the total, and only one of them brings money into the company. A fresh issue creates new shares and the proceeds go to the company. An offer for sale puts existing shareholders’ shares on the market, and the proceeds go to those shareholders. Both are part of the total.
| Comparison | Fresh issue | Offer for sale |
|---|---|---|
| Are new shares created? | Yes | No |
| Who receives the money? | The company | The selling shareholders |
| Does share count rise? | Yes | No |
| Does promoter holding fall? | By dilution | By sale |
An issue of ₹3,000 crore made up of ₹1,800 crore fresh and ₹1,200 crore offer for sale raises ₹1,800 crore for the business. The remaining ₹1,200 crore is an exit for the people selling. Reading only the headline number tells you nothing about which it is, and the split is stated on the cover page of the prospectus.
The minimum public offer the law requires
Minimum public offer in India is fixed by Rule 19(2)(b) of the Securities Contracts (Regulation) Rules, 1957. The rule sets no single rupee minimum for every issue. Instead it fixes the smallest proportion a company must place in public hands, in bands by size, and every band was replaced on 13 March 2026.
The thresholds are measured by the post issue capital of the company calculated at the offer price, which is the rule’s own wording. The requirement applies to each class or kind of equity shares, or of debentures convertible into equity shares, rather than to a public issue as a single block. The Ministry of Finance notified the change as G.S.R. 184(E) on 13 March 2026, under Section 30 of the Securities Contracts (Regulation) Act, 1956.
| Post issue capital at offer price | Minimum that must be offered | Public shareholding to reach 25% |
|---|---|---|
| Up to ₹1,600 crore | 25% | — |
| Above ₹1,600 crore to ₹4,000 crore | The percentage equal to ₹400 crore | Within 3 years |
| Above ₹4,000 crore to ₹50,000 crore | 10% | Within 3 years |
| Above ₹50,000 crore to ₹1,00,000 crore | ₹1,000 crore, and not less than 8% | Within 5 years |
| Above ₹1,00,000 crore to ₹5,00,000 crore | ₹6,250 crore, and not less than 2.75% | See below |
| Above ₹5,00,000 crore | ₹15,000 crore, and not less than 1% | See below |
For the two largest bands, the timeline splits on where public shareholding stands at listing. Below 15%, the company must reach 15% within five years and 25% within ten. At 15% or above, it must reach 25% within five years.
One further condition applies above ₹5,00,000 crore. Whatever the calculation in that band produces, at least 2.5% of post issue capital must be offered to the public.
Companies listing on an exchange in an International Financial Services Centre work to a single figure of 10%, and the bands above do not apply to them.
| Post issue capital | Before 13 March 2026 | From 13 March 2026 |
|---|---|---|
| ₹4,000 crore to ₹50,000 crore | 10% | 10%, unchanged |
| ₹50,000 crore to ₹1,00,000 crore | 10% | ₹1,000 crore, and not less than 8% |
| ₹1,00,000 crore to ₹5,00,000 crore | ₹5,000 crore, and not less than 5% | ₹6,250 crore, and not less than 2.75% |
| Above ₹5,00,000 crore | ₹5,000 crore, and not less than 5% | ₹15,000 crore, and not less than 1%, floor 2.5% |
Working the rule on real numbers
The band gives two tests and the higher one binds.
A company at ₹60,000 crore of post issue capital. Band four applies. The two tests are ₹1,000 crore and 8%. Eight per cent of ₹60,000 crore is ₹4,800 crore, which is the larger. The minimum is ₹4,800 crore.
A company at ₹2,00,000 crore. Band five applies. The tests are ₹6,250 crore and 2.75%. Two point seven five per cent of ₹2,00,000 crore is ₹5,500 crore, so the rupee figure binds. The minimum is ₹6,250 crore.
Under the old rule the same company faced ₹5,000 crore or 5%, and 5% of ₹2,00,000 crore is ₹10,000 crore. The minimum for that company fell from ₹10,000 crore to ₹6,250 crore.
A company at ₹8,00,000 crore. Band six applies. One per cent is ₹8,000 crore and the rupee test is ₹15,000 crore, so ₹15,000 crore would bind. The 2.5% floor then gives ₹20,000 crore, which is higher still, so ₹20,000 crore is the minimum.
Issue size is not market capitalisation
Issue size and market capitalisation measure different things, and the gap between them is usually large. The first counts only the shares being offered in the public issue. Market capitalisation counts every share the company has after listing, multiplied by the price.
A company with 100 crore shares outstanding after listing, priced at ₹200, has a market capitalisation of ₹20,000 crore. Offer 10 crore existing shares through an offer for sale and the issue comes to ₹2,000 crore, a tenth of the figure, with no change to the share count.
That ratio is the point of Rule 19(2)(b). The rule does not ask how much a company wants to raise. It asks what proportion of itself the company is putting in public hands, which is why the percentage falls as the company gets larger.
How the issue size is split between investors
Allocation of a book-built issue is set by Regulation 32 of the SEBI (ICDR) Regulations, 2018, and the split depends on which eligibility route the company uses. Three categories divide the whole amount, and none can take another’s share except where a portion goes unsubscribed.
These percentages divide an issue that has already been sized. They are separate from the Rule 19(2)(b) minimum above, which decides how large the offer has to be in the first place.
| Category | Regulation 6(1) route | Regulation 6(2) route |
|---|---|---|
| Qualified institutional buyers | Not more than 50% | Not less than 75% |
| Non-institutional investors | Not less than 15% | Not more than 15% |
| Retail individual investors | Not less than 35% | Not more than 10% |
Five per cent of the qualified institutional buyer portion is allocated to mutual funds, subject to valid bids at the applicable price. Up to 60% of that portion may be allotted to anchor investors before the issue opens.
Which route a company uses depends on whether it meets the profitability and net worth conditions in Regulation 6(1). A company that does not meet them uses Regulation 6(2), where three-quarters of the offer must go to institutions. Our pages on qualified institutional buyers and non-institutional investors set out who falls into each category.
Where to find the figure for a live issue
The amount for any public issue is stated on the cover page of the red herring prospectus, filed with SEBI and both exchanges before the issue opens. The cover gives the total, the split between fresh issue and offer for sale, and the price band. Nothing on a third-party site overrides that document.
Three places carry it:
- The Securities and Exchange Board of India filings section, which holds the draft and final offer documents
- The issue pages of the National Stock Exchange and BSE
- The company’s own investor section
Figures quoted before the prospectus is filed are estimates. The number moves when the price band is set, and again when the final price is fixed after the book closes.
Common Questions
The total value of shares a company offers in the public issue, calculated as shares offered multiplied by the price per share. Where a price band applies, the prospectus gives the amount at the lower and upper ends, and the final figure is known once the issue price is fixed.
Rule 19(2)(b) of the Securities Contracts (Regulation) Rules, 1957 sets it by band. A company with post issue capital up to ₹1,600 crore at the offer price must offer at least 25%. Above ₹5,00,000 crore, the figure is ₹15,000 crore and not less than 1%, with at least 2.5% offered to the public. The bands were replaced by G.S.R. 184(E) on 13 March 2026.
Yes. The total covers both the fresh issue and the offer for sale. Only the fresh issue brings money into the company; proceeds of an offer for sale go to the shareholders selling. The split is on the cover page of the prospectus.
Size on its own says nothing about an issue. Allotment odds depend on how heavily your own category is subscribed and on the allotment rules for it, not on the headline figure. A large offer says nothing about the price, the business or the use of proceeds. The choice is yours.
The first counts only the shares being offered. Market capitalisation counts all shares outstanding after listing, multiplied by the price. A company offering a tenth of itself raises a tenth of its market capitalisation.
On the cover page of the red herring prospectus filed with SEBI and the exchanges. The same document carries the fresh issue and offer for sale split and the price band.
Disclaimer: The views expressed here are of the author and do not reflect those of Dhanvantree. Mutual funds are subject to market risks, please read the scheme documents carefully before investing.