At the time of applying for an IPO,do I need to pay any brokerage?

No brokerage fee is charged for IPO applications. Only the minimum amount of money in your bank account is required to apply for an IPO. From the time you apply to the finalization, basis of allotment, your money will be frozen. If you have been allotted shares, it will be deducted. Unlocked shares will not be deducted.