Let’s work out what the tax payable on the capital gain is.
The tax you pay on your normal income of $105,000 of income is $26,347 (for 2018/19 tax rates).
The tax on the new taxable income of $302,500 is $109,222 (for 2018/19 tax rates) plus Medicare levy. So the tax payable has gone from $26,347 to $109,222, therefore the tax on the capital gain component is $109,222 less $26,347 – which is $82,875 plus Medicare.
So the total capital gains tax is $82,875.
And your net gain after tax (but ignoring Medicare) is approximately $312,125, which is $395,000 (your gross capital gain) less tax of $82,875.
The net amount you have made after tax for the whole 10 years is shown in the table.
This will take you into a higher marginal tax bracket and you need to think about what else might be affected by this change (e.g. Medicare Levy Surcharge).
Please note, this is not a real life example. And it is only one way to evaluate a gearing strategy. Also, to avoid further complicating this calculation, we have not considered inflation, or the time value of money, which can have a significant impact on the outcomes