Use the result as a scenario, not a black box
Find the sales volume required to cover fixed costs before profit begins. Enter monthly fixed expenses, average selling price and variable cost per sale to calculate contribution margin, break-even units and break-even revenue.
Break-even analysis compresses a complicated store into a simple question: how many average sales are needed to cover fixed costs? It is especially useful for scenario testing because you can see how changes in average order value, product cost or rent affect the required volume.
How the math works
Contribution per sale = selling price − variable cost. Contribution margin = contribution ÷ selling price. Break-even units = fixed costs ÷ contribution. Break-even revenue = break-even units × selling price.
With $85,000 in monthly fixed costs, a $55 average sale and $30 of variable cost, each sale contributes $25. Break-even volume is 3,400 sales per month, equal to about $187,000 in revenue.
Review inventory assumptions with Inventory Turnover and keep supplier-side economics separate with Wholesale Margin.
For the broader retail plan, read Business planning tools, Startup budget planner and Setting up a dispensary.
The SBA break-even calculator uses fixed costs divided by the difference between price and variable cost. This tool rounds the resulting sales count up to a whole sale.

