Bonsai
Contracts, proposals, and invoicing built for freelancers.
Visit tool →Units sold so contribution margin covers fixed overhead for that horizon.
Results are simplified estimates for educational purposes only and should not be treated as financial, accounting, legal, or tax advice. See our disclaimer for details.
Use when marginal economics are stable enough to pretend one average SKU. Step-changing costs (new warehouse) need a fresh run when crossed.
Fixed costs ÷ (price per unit − variable cost per unit). Tool rounds up to whole units when margin positive.
Using the default example values from the JSON seed for this tool:
Result: 412 units (Break-even units)
Units required so contribution margin covers fixed costs for the period you chose.
Assumes one average price and variable cost per unit—mix changes the truth.
Step-fixed costs need a new run when you cross hiring or capacity thresholds.
You assumed one average price and variable cost. Product mix washes that simplicity away in real carts.
If units look huge, revisit price, variable cost, or fixed cost inputs before cutting spend blindly.
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