Summary
If you make $17,805,840 a year living in Australia, you will be taxed $8,339,412. That means that your net pay will be $9,466,428 per year, or $788,869 per month. Your average tax rate is 46.8% and your marginal tax rate is 47.0%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of $100 in your salary will be taxed $47, hence, your net pay will only increase by $53.
Bonus Example
A $1,000 bonus will generate an extra $530 of net incomes. A $5,000 bonus will generate an extra $2,650 of net incomes.