Gross Margin

Gross margin is gross profit expressed as a share of revenue. Gross profit equals revenue minus cost of goods sold, or cost of revenue in many service businesses. The margin describes what remains after the costs classified in that category, before expenses reported below it. It is a measure of production or delivery economics under a stated accounting boundary, not the company’s final profit.

\[\text{Gross margin (percent)}=\frac{\text{Revenue} - \text{COGS}}{\text{Revenue}}\times100\]

On revenue of 1,000,000 and COGS of 400,000, gross profit is 600,000 and gross margin is 60%. Gross profit is an amount; gross margin is a ratio. Revenue must be nonzero for the ratio to be defined. Markup uses cost as its denominator: the same figures produce a 150% markup on COGS, not a 60% markup. Name the measure before comparing percentages.

Read what belongs in cost of sales

For a physical product, relevant costs can include materials, production labor and allocated production overhead. IAS 2 includes conversion costs such as direct labor and production overhead in inventory cost, with that cost recognized as an expense when the inventory is sold. Thus COGS is not simply “all variable costs,” and a cost can be fixed over a range of output while still belonging in production cost.

For services and software, inspect the reported cost-of-revenue policy and the functions performed by the teams or infrastructure involved. Hosting, delivery staff and customer support can affect service economics, while a customer-success role might combine delivery, retention and sales activities. Classification is not an unrestricted choice made to improve the ratio. Understand the applicable policy, allocation basis and consistent treatment before comparing companies or periods.

A classification change can alter gross margin without changing total expenses. If revenue is 1,000,000 and reported COGS is 400,000, moving an existing 50,000 expense into COGS would lower reported gross margin from 60% to 55%, with operating profit unchanged if nothing else changes. This is an illustrative reconciliation, not a recommendation to reclassify the expense. A cost list and policy explain what the ratio alone cannot.

Separate price, volume, cost and mix

A margin change can reflect selling price, input costs, utilization or the mix of products sold. If a high-margin product occupies a larger share of revenue, total margin can rise without improving either product’s own margin. Compare products on consistent definitions and reconcile the revenue-weighted result. The overall margin is not generally the simple average of product percentages.

Fixed production costs also matter. Assume COGS contains 150,000 of fixed costs plus variable costs equal to 25% of revenue over a specified operating range. At revenue of 400,000, COGS is 250,000 and gross margin is 37.5%. At revenue of 1,000,000, COGS is 400,000 and margin is 60%. The change follows from spreading the fixed amount across more sales. It does not require a lower variable unit cost.

That model does not extend automatically to unlimited growth. Extra capacity, staffing, discounts or supply constraints can change both fixed and variable costs. Negative gross profit can improve with scale when incremental contribution is positive and fixed costs can be covered. If additional sales fail to cover their incremental costs under unchanged conditions, more volume instead adds to the loss.

Distinguish gross margin, contribution and net margin

Contribution margin usually subtracts a defined set of variable or attributable costs for a decision. Gross margin follows the cost-of-sales boundary, which can include allocated fixed production costs and exclude some variable selling costs. Neither can substitute for the other without reconciling those differences. Net margin relates net income to revenue after the remaining expenses and other items included in that income measure.

A business can have positive gross profit while losing money after development, sales, administration, financing and tax. To study a simplified break-even case, if gross margin is assumed constant at 50% and expenses below gross profit are fixed at 2,000,000, revenue of 4,000,000 covers those expenses. If margin itself changes with volume, solve from the underlying cost model rather than treating 50% as a constant.

Use the right margin in customer economics

Margin connects revenue to the resources available to recover acquisition cost. However, multiplying revenue by reported gross margin produces gross profit under that accounting definition. A contribution LTV may require additional attributable costs, and fixed-cost allocation may differ from the cost of serving another customer. Avoid subtracting the same cost twice.

For LTV and payback, align customer segment, period, included costs and timing. A lifetime-average margin can hide expensive onboarding or later usage growth. A gross-profit payback estimate is not automatically cash payback because collection and payment schedules matter. Use gross margin to understand the production or delivery layer, then carry its scope explicitly into the decision being made.

References

• IFRS Foundation, IAS 2 Inventories