Learning Objective 3 Understand how income taxes affect CVP analysis
Net income is operating income plus nonoperating revenues (such as interest revenue) minus nonoperating costs (such as interest cost) minus income taxes. For simplicity, throughout this chapter we assume nonoperating revenues and nonoperating costs are zero. So, the net income equation is:
To make net income evaluations, CVP calculations for target income must be stated in terms of target net income instead of target operating income. For example, Emma may be interested in knowing the quantity of units of GMAT Success she must sell to earn a net income of $1,120, assuming an income tax rate of 30%.
In other words, to earn a target net income of $1,120, Emma’s target operating income is $1,600.

Target operating income: 1,600 dollars
Tax at 30 percent (0.30 times 1,600 dollars): 480 dollars
Target net income: 1,120 dollars
The key step is to take the target net income number and convert it into the corresponding target operating income number. We can then use equation 1 to determine the target operating income and substitute numbers from our GMAT Success example.
Alternatively, we can calculate the number of units Emma must sell by using the contribution margin method and equation 4:

Revenues, 200 dollars per unit times 45 units: 9,000 dollars
Variable costs, 120 dollars per unit times 45 units: 5,400 dollars
Contribution margin: 3,600 dollars
Fixed costs: 2,000 dollars
Operating income: 1,600 dollars
Income taxes, 1,600 dollars times 0.30: 480 dollars
Net income: 1,120 dollars
Emma can also use the PV graph in Exhibit 3-3. To earn the target operating income of $1,600, Emma needs to sell 45 units.
Focusing the analysis on target net income instead of target operating income will not change the breakeven point because, by definition, operating income at the breakeven point is $0 and no income taxes are paid when there is no operating income.