HKEX sets out that the amount payable for IPO shares comprises five elements: application money, brokerage (1%), SFC transaction levy (0.0027%), AFRC transaction levy (0.00015%) and the Exchange trading fee (0.00565%). Each is calculated on the application money and rounded to the nearest cent. These are the rates currently published by HKEX and HKEX's publication prevails. Basis: the IPO application example on HKEX's transaction fees page.
The links above lead to official sources such as HKEX and the SFC. The explanation on this site summarises them and may differ from the official definition; the official documents prevail.
This page explains the HK IPO term "IPO Application Costs" and links to related terms. Definitions are compiled from HKEX Practice Note 18 and the Listing Rules, for understanding subscription rules only — not investment advice.