Gross Margin vs. Contribution Margin: What’s the Difference?

Gross Margin vs. Contribution Margin: An Overview

Gross margin measures the amount of revenue that remains after subtracting costs directly associated with production. Contribution margin is a measure of the profitability of various individual products based on the variable costs associated with those goods.

Gross Margin

Gross margin is synonymous with gross profit margin and includes only revenue and direct production costs. It does not include operating expenses such as sales and marketing expenses, or other items such as taxes or loan interest. Gross margin would include a factory’s direct labor and direct materials costs, but not the administrative costs for operating the corporate office. 

Direct production costs are called cost of goods sold (COGS). This is the cost to produce the goods or services that a company sells. Gross margin shows how well a company generates revenue from direct costs such as direct labor and direct materials costs. Gross margin is calculated by deducting COGS from revenue and dividing the result by revenue. The result can be multiplied by 100 to generate a percentage.

How to Calculate Gross Margin

Gross profit is calculated as the different between net sales and cost of goods sold. Gross profit margin is calculated as the ratio between gross profit and net sales:

Gross Profit Margin = (Net Sales – COGS) / Net Sales

Net sales is determined by taking total gross revenue and deducting residual sale activity such as customer returns, product discounts, or product recalls. Cost of goods sold is the sum of the raw materials, labor, and overhead attributed to each product. Inventory (and by extension cost of goods sold) must be calculated using the absorption costing method as required by generally accepted accounting principles (GAAP).

Contribution Margin

Contribution margin is the revenue remaining after subtracting the variable costs that go into producing a product. Contribution margin calculates the profitability for individual items that a company makes and sells.

Specifically, contribution margin is used to review the variable costs included in the production cost of an individual item. It is a per-item profit metric, whereas gross margin is a company’s total profit metric. Contribution margin ratio is expressed as a percentage, though companies may also be interested in calculating the dollar amount of contribution margin to understand the per-dollar amount attributable to fixed costs.

How to Calculate Contribution Margin

Contribution margin is the difference between revenue and variable costs. It can be calculated on an aggregate basis or a per unit basis, and contribution margin is reported on a dollar basis:

Contribution Margin = Net Sales Revenue – Variable Costs

Net sales is calculated the same for contribution margin as gross margin. However, variable costs are different than cost of goods sold. Often, a company’s cost of goods sold will be comprised of variable costs and fixed costs. Variable costs are only expenses incurred in proportion of manufacturing; for example, manufacturing one additional unit will result in a little bit of materials expense, labor expense, and overhead expenses.

Key Differences

Different Implementations

Most often, a company will analyze gross margin on a company-wide basis. This is how gross margin is communicated on a company’s set of financial reports, and gross margin may be more difficult to analyze on a per-unit basis.

Alternatively, contribution margin is often more accessible and useful on a per-unit or per-product basis. A company will be more interested in knowing how much profit for each unit can be used to cover fixed costs as this will directly impact what product lines are kept.

Different Expense Considerations

Gross margin considers a broader range of expenses than contribution margin. Gross margin encompasses all of the cost of goods sold regardless of if they were a fixed cost or variable cost.

The primary difference is fixed overhead is included in cost of goods sold, while fixed overhead is not considered in the calculation for contribution margin. As contribution margin will have fewer costs, contribution margin will likely always be higher than gross margin.

Different Users

Investors, lenders, government agencies, and regulatory bodies are interested in the total profitability of a company. These users are more interested in the total profitability of a company considering all of the costs required to manufacture a good.

On the other hand, internal management may be most interested in the costs that go into manufacturing a good that are controllable. Management may have little to no say regarding fixed costs; therefore, internal members of a company often focus more on the elements they are responsible for (i.e. the variable costs) that fluctuate with production levels.

Different Reporting Requirements

Technically, gross margin is not explicitly required as part of externally presented financial statements. However, external financial statements must presented showing total revenue and the cost of goods sold. Often, externally presented reports will contain gross margin (or at least both categories required to calculate gross margin).

On the other hand, a company is not required to externally disclose its amount of variable costs. In its financial statements, it is not required to bifurcate fixed expenses from variable costs. For this reason, contribution margin is simply not an external reporting requirement.

Different Levels of Transparency

Under either method, a company’s ultimate net income will be the same. Because gross margin encompasses all costs necessary to manufacture a good, some may argue it is a more transparent figure. On the other hand, a company may be able to shift costs from variable costs to fixed costs to “manipulate” or hide expenses easier.

For example, consider a soap manufacturer that previously paid $0.50 per bar for packaging. Should the company enter into an agreement to pay $500 for all packaging for all bars manufactured this month. Gross margin would report both types of costs the same (include it in its calculation), while contribution margin would consider these costs differently.

Gross Margin vs. Contribution Margin Example

If a company has $2 million in revenue and its COGS is $1.5 million, gross margin would equal revenue minus COGS, which is $500,000 or ($2 million – $1.5 million). As a percentage, the company’s gross profit margin is 25%, or ($2 million – $1.5 million) / $2 million. 

For an example of contribution margin, take Company XYZ, which receives $10,000 in revenue for each widget it produces, while variable costs for the widget is $6,000. The contribution margin is calculated by subtracting variable costs from revenue, then dividing the result by revenue, or (revenue – variable costs) / revenue. Thus, the contribution margin in our example is 40%, or ($10,000 – $6,000) / $10,000.

Contribution margin is not intended to be an all-encompassing measure of a company’s profitability. However, contribution margin can be used to examine variable production costs. Contribution margin can also be used to evaluate the profitability of an item and calculate how to improve its profitability, either by reducing variable production costs or by increasing the item’s price.

Other Profit Metrics

Gross margin and contribution margin are just two of the many different types of profit metrics. Other examples of profit metrics include:

• Operating Profit: Operating profit is the amount of money a company earns after all costs of goods sold, operating expenses, depreciation, and amortization have been subtracted from net revenue.
• Pre-Tax Profit: Pre-tax profit is the amount of money a company earns after all costs except for taxes have been considered. This is often calculated as operating profit less interest expense.
• Net Income: Net income is the amount of money a company earns after all expenses have been deducted from net revenue.
• Accounting Profit: Accounting profit is the amount of money a company earns in accordance with GAAP. GAAP rules require that net income be included on a company’s income statement.
• Economic Profit: Economic profit is the sum of the accounting profit and opportunity cost. It attempts to recognize the all expenses, even ones that result in benefits foregone.
• Other Comprehensive Income: Other comprehensive income (OCI) is an accounting metric that recognized gains and losses yet to be realized.

The Bottom Line

As a company becomes strategic about the customers it serves and products it sells, it must analyze its profit in different ways. Two of those ways are gross margin and contribution margin. Gross margin encompasses all costs of a specific product, while contribution margin encompasses only the variable costs of a good. While gross profit is more useful in identifying whether a product is profitable, contribution margin can be used to determine when a company will breakeven or how well it will be able to cover fixed costs.