ASBA (Applications Supported by Blocked Amount) is a procedure designed by SEBI, India's stock market regulator, for applying to IPOs, rights issues, and FPS, among other things. An IPO applicant's bank account is not debited until shares are issued to them, according to ASBA.

The acronym ASBA stands for "Applications Supported by Blocked Amount." For subscribing to an issue, ASBA is an application that contains an authority to block money in the application's bank account. If an investor applies through ASBA, the money from his or her account will be deducted only if his or her application is selected for allotment after the basis of allotment is confirmed, or if the issue is withdrawn/failed.