Publishing contribution margin calculator

Worked example

• Revenue: 10,000 USD
• Variable costs: 3,500 USD

Contribution margin · 65%

How to interpret the result

Include costs that change with serving or acquiring this business. Fixed overhead belongs in a separate profitability calculation.

Publisher example

A campaign brings $6,000 with $7,500 in variable costs. Its contribution margin is −25% before fixed costs. Selling more on the same terms deepens that loss.

Related reading: Ghost self-hosting vs Ghost(Pro): calculate hosting and maintenance break-even

Measurement reference: SBA break-even method