Step 2 - Annualize the taxable income, i.e. multiply by 12
Step 3 - Determine which bracket it falls under of the 4 brackets provided by law and calculate accordingly. E.g. a total annual taxable income of 80,000 is classified under the 0 - 100,000 tax bracket, and therefore the applicable rate would be 20% of the amount = 16,000. An annual taxable income of 180,000 would be under the 150,000 - 200,000 bracket, and therefore the applicable tax rate would be 32,500 on the first 150,000 PLUS 30% on the balance of 30,000 = 9,000; total tax would, therefore, be 32,500 + 9,000 = 41,500.
Step 4 - Apply the rebate amount; every ordinary individual is entitled to a rebate (means of reducing tax liability) amount of E8,200 per annum. E.g., if your tax liability is E41,500, the rebate will reduce it to E33,300.
Step 5 - Convert annual tax liability to a monthly amount by dividing by 12. E.g., the monthly amount on E33,300 is E2,775, which is the tax that will be deducted in that particular month.