How to calculate net income before taxes By pbrennan040 2020 Step 1: Calculating the Gross Profit Total Revenue - Cost of Goods Sold = Gross Profit 2020 Step 2: Calculate the Operating Expenses Salary + Rent + Utilities + Depreciation + Interest = Operating Expenses 2020 Step 3: Calculate the Net Income before taxes Gross Profit - Total Operating Expenses = Net Income before taxes