Do I get tax relief when buying a medical aid?

You will be entitled to a tax credit against the taxes owing each year. Currently this stands at R257 per member for the first two members per month.

thank you, if medical aid is deducted by my employer, then how much tax relief do I get?

You would still get the same relief as the tax credit is the same regardless of who pays it, the difference is you will receive this relief via a reduction in PAYE which means slightly more money in your account each month.