Definition of Contribution Margin Ratio



Contribution margin ratio is a percentage of contribution to sales. It is calculated by dividing the total contribution margin by total sales. Contribution margin is calculated by deducting all the variable costs from total sales.

 


The formula for contribution margin ratio is:

Contribution margin ratio = Total Contribution / Total Sales = (Sales – variable costs) / Sales

 


Assume the following contribution income statement:

 

Sales

 

    7,500,000

Less: Variable Costs

   

Material

      (350,000)

 

Labor

      (700,000)

 

Variable FOH

  (1,200,000)

 

Variable Marketing costs

      (370,000)

 

Variable Selling costs

  (1,350,000)

  (3,970,000)

Contribution Margin

 

    3,530,000

Less: Fixed Costs

   

Fixed FOH

      (600,000)

 

Fixed Marketing costs

      (420,000)

 

Fixed Selling costs

      (500,000)

  (1,520,000)

Profit

 

    2,010,000

 

 

In the example above the contribution margin ratio will be 47.06% (3,530,000 / 7,500,000).

 

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