I make about 300 trades per year. My trading account has...

I make about 300 trades per year. My trading account has download trades/statement option, it downloads in excel, and then I modify it a little bit, and have total. Couple of hours job. Another option is to make your trading as income activity, not as an investment. Then you can't claim 50% CGT discount, but much easier to calculate. Just have 2 figures in your trading account - beginning of the year, and end of year, and pay tax on it (or deduct from your salary, I think..)