Skip to content
IPO Basics

SME IPO vs Mainboard IPO: Crucial Differences

C
Written by Chandresh Khambhayata Last Updated: Jul 29, 2026
1 min read Editorial Approved

Indian public issues are classified into two distinct markets: Mainboard IPOs and Small & Medium Enterprise (SME) IPOs. While Mainboard IPOs target large, mature companies listing on the main NSE and BSE exchanges, SME IPOs target early-stage growth companies seeking access to capital markets via the NSE Emerge and BSE SME platforms.

Key Differences to Note

1. Minimum Investment: Mainboard IPOs require a minimum retail investment of around ₹14,000 to ₹15,000. SME IPOs, conversely, require a minimum retail lot size bid of ₹1,00,000 to ₹1,40,000.
2. Post-Listing Lot Trading: Mainboard shares trade in quantities of 1 share post-listing. SME shares must be traded in predefined large lot sizes (e.g., 1000 shares), meaning investors cannot sell single shares, creating liquidity challenges.
3. Regulatory Scrutiny: Mainboard IPO filings are audited directly by SEBI. SME IPO drafts are audited by the respective stock exchanges, which is a faster and less stringent process.

SME IPOs carry high growth potential but come with significantly higher volatility and liquidity risks. They are suited for sophisticated investors rather than absolute beginners.

C

About the Author: Chandresh Khambhayata

Chandresh Khambhayata · Founder of IPONow

Chandresh is an experienced financial analyst and equity research advisor specializing in primary markets, corporate balance sheets, and IPO valuation metrics like PE ratio and ROCE.

Share this guide:
Home IPOs GMP News Toolkit