double taxation treaty
noun [ C ]
TAX, GOVERNMENT ukus(also double taxation agreement)an agreement between two or more countries that reduces the amount of tax that a international worker or company must pay, so they do not have to pay tax twice on the same income:
Under the double taxation treaty, any tax paid in the country of residence will be exempt in the country in which it arises.
Tax deducted at source will be offsettable against your UK liability as the UK has a double taxation agreement with South Africa.