Summary
If you make GH₵ 18,240,000 a year living in Ghana, you will be taxed GH₵ 6,157,947. That means that your net pay will be GH₵ 12,082,053 per year, or GH₵ 1,006,838 per month. Your average tax rate is 33.8% and your marginal tax rate is 33.9%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of GH₵ 100 in your salary will be taxed GH₵ 33.85, hence, your net pay will only increase by GH₵ 66.15.
Bonus Example
A GH₵ 1,000 bonus will generate an extra GH₵ 662 of net incomes. A GH₵ 5,000 bonus will generate an extra GH₵ 3,308 of net incomes.