How much tax for R100,000 sign up bonus?

I joined a company which agreed a sign up bonus of R200 000 of which 50% (R100,000) would be paid in first month. And this sign up bonus is taxable, so how much tax would be deducted on my first payment of R100,000?

It would depend on your other earnings, but please make use of our SARS income tax calculator to work out the tax owing.