Not all IPOs are the same. India has two distinct tracks — Mainboard and SME — and the differences affect how much you invest, where the shares list, and how much risk you take on. Here is a clear comparison.
Two different platforms
Mainboard IPOs are the large, well-known issues that list on the main boards of the NSE and BSE. These are companies that meet the exchanges' full eligibility criteria for size, track record and public shareholding.
SME IPOs are smaller companies that list on the dedicated SME platforms — NSE Emerge and BSE SME. The listing requirements are lighter, which lets younger and smaller businesses raise public capital.
You can browse each track separately on ipostation: Mainboard IPOs and SME IPOs.
The practical differences
| Mainboard | SME | |
|---|---|---|
| Listing platform | NSE / BSE main board | NSE Emerge / BSE SME |
| Minimum investment | ~₹14,000–15,000 (one lot) | Often ₹1–1.5 lakh+ (one lot) |
| Lot size | Small (a few dozen shares) | Large (hundreds/thousands of shares) |
| Investor base | Retail + institutions | Mostly HNIs and informed retail |
| Liquidity after listing | Generally higher | Often thinner |
| Disclosure | Full exchange requirements | Lighter requirements |
The single biggest surprise for new investors is the minimum investment. A mainboard lot usually costs around ₹14,000–15,000, but an SME lot is often ₹1 lakh or more — SME rules require a much larger minimum application, which puts them out of reach for many small investors.
Risk and reward
SME IPOs can deliver dramatic listing gains, and in some periods they have outperformed mainboard issues on average listing pop. But they come with real trade-offs:
- Lower liquidity — it can be harder to buy or sell after listing.
- Less coverage — fewer analysts and less public information.
- Higher volatility — smaller floats mean sharper price moves.
Neither track is "better" — they suit different risk appetites and cheque sizes.
Before you apply
Whichever track an IPO is on, the checklist is the same: read the subscription demand, understand the grey market premium and its limits, look at the fresh-issue-versus-OFS structure, and check the financials on the IPO's own page. The label — mainboard or SME — is just the starting point.
This article is educational and is not investment advice.