How much once off tax of R200 000?

I'm already paying SARS from my salary, now im in a stokvel and when its my turn to get money, I will get - R200 000 from other members, how much must I pay to sars?

It is like an investment, so you will be taxed on the growth of the amount you invested. So this difference would be treated like a dividend and taxed at 15%.