Yes, foreign lottery winnings are taxable in South Africa. The South African Revenue Service (SARS) considers foreign lottery winnings to be gambling winnings, which are subject to a 25% withholding tax.

If you win a foreign lottery, you will receive a Form W-2G from the lottery operator. This form will show the amount of your winnings and the amount of tax that has been withheld. You will need to file Form W-2G with your South African income tax return.

If you are a South African resident, you will also need to pay South African income tax on your foreign lottery winnings. The amount of South African income tax that you will need to pay will depend on your total income.

Here are some tips for avoiding tax on foreign lottery winnings:

• Sign up for a lottery pool. If you sign up for a lottery pool, you will only be taxed on your share of the winnings.
• Don’t claim your winnings. If you don’t claim your winnings, you won’t have to pay any tax on them. However, you will also not be able to use your winnings for anything.
• Move to a country without a tax treaty with South Africa. If you move to a country without a tax treaty with South Africa, you will not have to pay South African income tax on your foreign lottery winnings.

It is important to note that these are just a few tips. It is always best to consult with a tax advisor to get specific advice on your situation.