Hi Secok. I'm not an accountant. You need to see a proper tax advisor but these links may help. You may in fact be a share trader rather than a share holder and as such profits would be classed as PAYG income rather than taxed as a CGT event.http://www.ato.gov.au/businesses/content.asp?doc=/content/21749.htm&page=6&H6http://www.ato.gov.au/businesses/content.asp?doc=/content/21749.htmhttp://www.ato.gov.au/content/downloads/IND00191825n26320609.pdfAs far as I know if you only hold shares as an investor then its a CGT event.The 30% referes to the tax rate applied for Non residents on income up to about $35k:http://www.ato.gov.au/individuals/content.asp?doc=/content/12333.htm&mnu=43165&mfp=001/003Good luck.....Please see an accountant to verify.