Break-even
What’s left after variable cost to cover rent?
Contribution margin is price minus what it costs to sell one more unit. That leftover is what chips away at fixed costs. Link it to break-even when you’re ready for unit counts.
Negative contribution means every sale digs a deeper hole. Fix price or variable cost before you buy more ads.
Runs in your browserNo signupNot tax advice
$
What you charge
$
Cost per unit sold
CM = price − variable
Contribution / unit$15.00
CM ratio60.0%
Price$25.00
Estimates only — not tax or accounting advice. Double-check before you print price tags.
How it's calculated
Variable cost is whatever moves with one more unit — materials, packaging, per-order fees you treat as cost. Fixed rent stays out of this page.
contribution = price − variable cost ratio = contribution ÷ price