The payment milestones for STP are as follows:

Payment for STP Processing Fees
You will need to pay the processing fee during the application stage. The e-Service for Student's Pass will prompt you that the application is "Pending Processing Fee."
A: For prospective students of Institute of Higher Learning, please click this ICA e-Service.
B: For other prospective students, please click this ICA e-Service.
The available payment modes in the e-Service are eNets; Credit/ Debit Cards; Internet banking or PayNow.

Payment for STP Issuance/Visa Fees
If your application is successful, you will need to make payment for the issuance/visa fees. You can arrange to make the necessary payment once the status reflected in the relevant e-Service for Student's Pass is "IPA (Pending Issuance Fee)".
A: For prospective students of Institute of Higher Learning, please click on this ICA e-Service.
B: For other prospective students, please click this ICA e-Service.
The available payment modes in the e-Service are eNets; Credit/ Debit Cards; Internet banking or PayNow.

Please refer to ICA website for more information on payment-related enquiries.