From the official site:
Online payments: instructions
You can pay your licence fees online by doing an electronic funds transfer (EFT) from your banking website. Follow these three easy steps to do so:
- Complete one of our business or individual online forms, and click on “Submit”
- Wait for our electronic renewal advice (we will send this to you within two working days). This will list the amount that is due, a reference number and our banking details. You can also obtain this information from our Call Centre on 0860 103 089
- Pay your licence fees by transferring the funds electronically
We will process and post your licence within five working days. Please note that this facility is for the payment of vehicle licenses only, and should not be used for the payment of rates, traffic fines and other municipal accounts.
Related Link: http://www.capetown.gov.za/en/Vehiclelicensing/Pages/Licencepayments.aspx