ASBA
ASBA (Application Supported by Blocked Amount) is the mandatory payment mechanism for Indian IPO applications, where the applicant's bank account is blocked for the application amount during the subscription period instead of the funds being debited upfront, with the actual debit occurring only upon allotment.
ASBA was introduced by SEBI in 2008 as an optional alternative to the conventional cheque-based IPO application process, and was made mandatory for all categories of investors in 2016. The ASBA mechanism transformed the IPO application experience for Indian retail investors by eliminating a significant pain point: under the old system, investors had to issue cheques or demand drafts that were encashed upfront, with refunds issued weeks later for unallotted amounts — during which time investors lost the interest-earning potential of those funds. Under ASBA, the funds are merely blocked in the investor's savings account and continue to earn interest until either utilised for allotment or unblocked for unsuccessful applications.
The mechanics of ASBA work through a network of Self-Certified Syndicate Banks (SCSBs) — banks that have registered with SEBI to accept ASBA applications. When an investor submits an ASBA application (either physically at an SCSB branch or electronically through the bank's internet banking or mobile banking platform), the SCSB blocks the application amount in the investor's account and sends the application data to the stock exchange's bidding platform. The investor retains the physical use of the blocked funds for other purposes (such as earning interest on a savings account) until the block is either released or converted into a debit.
SEBI has expanded the ASBA framework significantly over the years. Stockbrokers and trading members are authorised by SEBI to act as intermediaries for submitting ASBA applications (referred to as the "3-in-1" facility offered by banks integrated with their brokerage subsidiaries). This allows investors to apply for IPOs directly through their trading platforms without needing to visit a bank branch. The application data is forwarded to the stock exchange by the broker acting as an intermediary, while the fund block remains with the investor's SCSB.
After the subscription window closes, the registrar to the issue consolidates all application data, conducts the basis of allotment computation, and sends allotment instructions to the depositories and the SCSBs. SCSBs then debit the blocked amounts from successful allottees' accounts and transfer the funds to the escrow account of the issue. For unsuccessful or partially allotted applicants, the block on the remaining amount is released simultaneously, restoring the full liquidity of those funds to the investor. This simultaneous settlement ensures that investors are never in a situation where their funds are held indefinitely.
One important procedural note for investors using ASBA is the requirement to apply with a bank account linked to a PAN and demat account under the same name. Applications where the bank account holder name does not match the demat account holder name are liable to rejection during the technical verification stage conducted by the SCSB and the registrar. Investors must also ensure that the blocked amount in the account is maintained throughout the subscription and allotment period, as a reduction in balance below the blocked amount can lead to application rejection.