You'll need to pay Capital Gains Tax. Let's go through this.
Let's say you buy 5,000 shares at a dollar a share in XYZ Engineering Company. They invent some awesome widget, and the share price goes up from a dollar a share to five dollars a share. So you cash in by selling 1,000 shares.
You've made a profit of 1,000 shares x $4.00: $4,000
You need to provide this figure to your accountant, or put it into your tax return so as the govt can decide on how much you owe them. I don't know the exact figures (esuperfund does all my numbers) but you certainly do have to account for it in your tax statements.
