RE: 20% tax on dividend22 Oct 2025 15:53
Withholding tax applies to all shares, whether held in ISA, trading account, or SIPP. No online platform bothers to claim it on your behalf, even though they have the ability to do so, because South Africa it is such a minority sport that it is not worth them changing their computer systems and procedures. If you hold your own certificates (ie a genuine owner rather than a mere beneficial owner) then you can recover it.
Angels, I have tried that and won, and I have also lost out. While it does probably work looking at the closing price and opening price the next day, I have never hit both. Look at history charts and see if your practical typical timings would have done it on the last dividend, ex-div 18/9. If it did cover trading costs ( I think it would), do it next time.