What is the tax rate for trusts in South Africa?

It will be on the net income of the Trust after allowable deductions.

Thanks for the quick reply.
Where can I find out what the allowable deductions for Trusts are?

Trusts can deduct amounts related to income they earn in the same way as a business. So expenses related to income earning activities. However the trust must be paying tax or earning income itself in order to claim deductions and not distribute amounts to the beneficiaries.