Method
Contribution margin equals average pledge minus per-backer product, packaging, fulfillment, shipping subsidy, other variable costs, and entered percentage fees. Fixed campaign costs divided by positive contribution margin gives the break-even backer count.
Example and limits
Use a realistic average pledge rather than a headline tier. This is campaign economics, not a platform fee or tax calculator.
Related tools
Use contribution margin before counting backers
Average pledge is the revenue basis. Product, packaging, fulfillment, subsidy, other variable cost, and editable percentage fees are subtracted per backer; campaign, art, prototype, marketing, video, and other fixed costs are then divided by positive contribution margin.
Use the result in a design decision
If margin is zero or negative, a break-even count does not exist. Test a lower average pledge or higher fulfillment cost before using the result as a launch target, and handle taxes separately for the relevant jurisdiction.